Terminal, wireless communication method, base station and system

Abstract

A terminal according to one aspect of the present disclosure comprises: a reception unit which receives one signal among a secondary synchronization signal (SSS) and a channel state information (CSI)-reference signal (RS); and a control unit which measures a layer 1 (L1)-signal to interference noise ratio (SINR) on the basis of the signal. The L1-SINR can be obtained by dividing the linear average over the power contributions of a resource element carrying the signal by the linear average of the power contributions of noise and interference. The noise and interference are the total received power on the resource indicated by a higher layer.

Description

[Technical field]

[0001] The present disclosure relates to a terminal and a wireless communication method in a next-generation mobile communication system. 、 base station and systems Regarding. [Background technology]

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of achieving higher data rates and lower latency (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of achieving higher capacity and greater sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later, etc.) are also being considered.

[0004] In existing LTE systems (e.g., 3GPP Rel. 8-14), a user equipment (User Equipment (UE)) transmits uplink control information (Uplink Control Information (UCI)) using at least one of an UL data channel (e.g., a Physical Uplink Shared Channel (PUSCH)) and an UL control channel (e.g., a Physical Uplink Control Channel (PUCCH)). [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention [Problem to be solved by the invention]

[0006] In future wireless communication systems (e.g., NR), the UE measures the signal-to-noise and interference ratio (SINR). However, it is unclear how to measure the interference. If the interference is not measured properly, it may lead to degradation of system performance, such as reduced throughput.

[0007] Therefore, the present disclosure relates to a terminal and a wireless communication method for appropriately measuring interference. 、 base station and systems One of the aims is to provide. [Means for solving the problem]

[0008] A terminal according to an embodiment of the present disclosure includes a receiver for receiving a secondary synchronization signal (SSS) and a controller for measuring a layer 1 (L1)-signal to interference and noise ratio (SINR) based on the SSS, the L1-SINR being obtained by dividing a linear average over a first power contribution of a resource element carrying the SSS by a linear average of a second power contribution of noise and interference, the second power being instructed by a higher layer. Ruri This is the total received power on the source, excluding the L1-SINR measurement. Channel state information ( CSI )For measurements , dried For interference measurement The non-zero power of ( NZP ) CSI- Reference signal ( RS ) Each of the multiple ports of the resource corresponds to one interference transmission layer; Excluding the above L1-SINR measurement In the CSI measurement, all interference measurement layers corresponding to the multiple ports are associated with an energy per resource element (EPRE) ratio. For the CSI measurements other than the measurement of the L1-SINR, the control unit assumes other interference signals on resource elements of the NZP CSI-RS resource for channel measurement, the NZP CSI-RS resource for interference measurement, or the CSI-interference measurement (IM) resource for interference measurement. It is characterized by: Effect of the Invention

[0009] According to one aspect of the present disclosure, the interference is appropriately measured. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram showing an example of an assumed interference measurement resource. [Diagram 2] FIG. 2 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Diagram 3] FIG. 3 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 4] FIG. 4 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Diagram 5] FIG. 5 is a diagram illustrating an example of a hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] (CSI report or reporting) In Rel.15 NR, a terminal (also referred to as a user terminal, User Equipment (UE), etc.) generates (also referred to as determining, calculating, estimating, measuring, etc.) channel state information (CSI) based on a reference signal (RS) (or a resource for the RS), and transmits (also referred to as reporting, feeding back, etc.) the generated CSI to a network (e.g., a base station). The CSI may be transmitted to the base station, for example, using an uplink control channel (e.g., a Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (e.g., a Physical Uplink Shared Channel (PUSCH)).

[0012] The RS used to generate CSI may be at least one of, for example, a Channel State Information Reference Signal (CSI-RS), a Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, a Synchronization Signal (SS), a DeModulation Reference Signal (DMRS), etc.

[0013] The CSI-RS may include at least one of a Non Zero Power (NZP) CSI-RS and a CSI-Interference Management (CSI-IM). The SS / PBCH block is a block including an SS and a PBCH (and a corresponding DMRS), and may be referred to as an SS block (SSB), etc. The SS may include at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).

[0014] The CSI may include at least one parameter (CSI parameter) such as a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a CSI-RS Resource Indicator (CRI), a SS / PBCH Block Indicator (SSBRI), a Layer Indicator (LI), a Rank Indicator (RI), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal-to-Noise and Interference Ratio or Signal to Interference plus Noise Ratio), and L1-SNR (Signal to Noise Ratio).

[0015] The UE may receive information related to CSI reporting (report configuration information) and control CSI reporting based on the report configuration information. The report configuration information may be, for example, "CSI-ReportConfig" of an information element (IE) of Radio Resource Control (RRC). In the present disclosure, the RRC IE may be rephrased as an RRC parameter, a higher layer parameter, or the like.

[0016] The reporting configuration information (eg, the RRC IE "CSI-ReportConfig") may include, for example, at least one of the following: Information about the type of CSI report (report type information, e.g., RRC IE "reportConfigType") Information on one or more quantities of CSI to be reported (one or more CSI parameters) (report quantity information, e.g., RRC IE "reportQuantity") Information on the RS resource used to generate the amount (the CSI parameter) (resource information, for example, the RRC IE "CSI-ResourceConfigId") Information about the frequency domain for which CSI is reported (frequency domain information, e.g., RRC IE "reportFreqConfiguration")

[0017] For example, the report type information may indicate a periodic CSI (P-CSI) report, an aperiodic CSI (A-CSI) report, or a semi-persistent CSI (SP-CSI) report.

[0018] Furthermore, the reporting amount information may specify at least one combination of the above CSI parameters (for example, CRI, RI, PMI, CQI, LI, L1-RSRP, etc.).

[0019] The resource information may also be an ID of a resource for RS. The resource for RS may include, for example, a non-zero power CSI-RS resource or an SSB, and a CSI-IM resource (for example, a zero power CSI-RS resource).

[0020] The frequency domain information may also indicate frequency granularity of the CSI report. The frequency granularity may include, for example, a wideband and a subband. The wideband is the entire CSI reporting band. The wideband may be, for example, the entirety of a certain carrier (a component carrier (CC)), a cell, a serving cell), or the entirety of a bandwidth part (BWP) in a certain carrier. The wideband may be rephrased as a CSI reporting band, the entire CSI reporting band, or the like.

[0021] Also, a subband is a part of a wideband and may be composed of one or more resource blocks (RBs or PRBs). The size of the subband may be determined according to the size of the BWP (the number of PRBs).

[0022] The frequency domain information may indicate whether wideband or subband PMI is to be reported (for example, the frequency domain information may include an RRC IE "pmi-FormatIndicator" used to determine whether wideband PMI reporting or subband PMI reporting is to be performed). The UE may determine the frequency granularity of the CSI report (i.e., whether wideband PMI reporting or subband PMI reporting) based on at least one of the above-mentioned reporting amount information and frequency domain information.

[0023] If wideband PMI reporting is configured, one wideband PMI may be reported for the entire CSI reporting band, whereas if subband PMI reporting is configured, a single wideband indication i 1is reported for the entire CSI reporting band, and one subband indication i for each of one or more subbands within the entire CSI report 2 (eg, a subband representation for each subband) may be reported.

[0024] The UE performs channel estimation using the received RS to estimate a channel matrix H. The UE feeds back a propagation mediation index (PMI) that is determined based on the estimated channel matrix.

[0025] The PMI may indicate a precoder matrix (also referred to as a precoder) that the UE considers appropriate for use in downlink (DL) transmission to the UE. Each value of the PMI may correspond to one precoder matrix. A set of values ​​of the PMI may correspond to a set of different precoder matrices called a precoder codebook (also referred to as a codebook).

[0026] In the space domain, a CSI report may include one or more types of CSI. For example, the CSI may include at least one of a first type (type-1 CSI) used for selecting a single beam and a second type (type-2 CSI) used for selecting a multi-beam. A single beam may be rephrased as a single layer, and a multi-beam may be rephrased as multiple beams. In addition, type-1 CSI does not assume multi-user multiple input multiple output (MIMO), and type-2 CSI may assume multi-user MIMO.

[0027] The above codebook may include a codebook for type 1 CSI (also referred to as a type 1 codebook, etc.) and a codebook for type 2 CSI (also referred to as a type 2 codebook, etc.). Further, type 1 CSI may include type 1 single panel CSI and type 1 multi-panel CSI, and different codebooks (type 1 single panel codebook, type 1 multi-panel codebook) may be defined respectively.

[0028] In the present disclosure, type 1 and type I may be read as each other. In the present disclosure, type 2 and type II may be read as each other.

[0029] The uplink control information (UCI) type may include at least one of Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), scheduling request (SR), and CSI. The UCI may be carried by the PUCCH or may be carried by the PUSCH.

[0030] In Rel.15 NR, the UCI may include one CSI part for wideband PMI feedback. The CSI report #n includes the PMI wideband information if reported.

[0031] In Rel.15 NR, the UCI may include two CSI parts for subband PMI feedback. CSI part 1 includes the wideband PMI information. CSI part 2 includes one wideband PMI information and several subband PMI information. CSI part 1 and CSI part 2 are separately coded.

[0032] In Rel.15 NR, a UE is configured by a higher layer with report settings of N (N≧1) CSI reporting configurations and resource settings of M (M≧1) CSI resource configurations. For example, a CSI reporting configuration (CSI-ReportConfig) includes a resource setting for channel measurement (resourcesForChannelMeasurement), a CSI-IM resource setting for interference (csi-IM-ResourceForInterference), an NZP CSI-RS setting for interference (nzp-CSI-RS-ResourceForInterference), a report quantity (reportQuantity), etc. Each of the resource setting for channel measurement, the CSI-IM resource setting for interference, and the NZP CSI-RS setting for interference is associated with a CSI resource configuration (CSI-ResourceConfig, CSI-ResourceConfigId). The CSI resource configuration includes a list of CSI-RS resource sets (csi-RS-ResourceSetList, for example, an NZP CSI-RS resource set or a CSI-IM resource set).

[0033] If interference measurements are performed in CSI-IM, each CSI-RS resource for channel measurements is associated with a CSI-IM resource on a resource-by-resource basis in the order of CSI-RS resources and CSI-IM resources in the corresponding resource set, and the number of CSI-RS resources for channel measurements is equal to the number of CSI-IM resources.

[0034] That is, for interference measurement based on CSI-IM, the channel measurement resource (CMR) and the interference measurement resource (IMR) have a one-to-one mapping.

[0035] If the UE is configured with a CSI reporting configuration with the report quantity (higher layer parameter reportQuantity) set to 'cri-RSRP', 'cri-RI-PMI-CQI', 'cri-RI-i1', 'cri-RI-i1-CQI', 'cri-RI-CQI', or 'cri-RI-LI-PMI-CQI', and K S (K S If (k > 1) resources are configured, the UE derives CSI parameters other than CRI subject to the reported CRI. CSI k (k ≥ 0) corresponds to the configured (k + 1)-th entry of the associated NZP CSI-RS resource (nzp-CSI-RSResource) in the corresponding NZP CSI-RS resource set (nzp-CSI-RS-ResourceSet) for channel measurements and the configured (k + 1)-th entry of the associated CSI-IM resource (csi-IM-Resource) in the CSI-IM resource set (csi-IM-ResourceSet), if configured.

[0036] That is, CSI k corresponds to the set (k+1)th CMR and the set (k+1)th IMR.

[0037] In Rel.16, for L1-SINR, both zero power (ZP)-CSI-RS and NZP-CSI-RS can be used for interference measurement. However, it is not clear how to measure interference in this way.

[0038] When calculating L1-SINR for a CMR and an IMR when an individual IMR is set, it is considered that the numerator is the signal power measured on the CMR and the denominator (interference and noise) is the total received power on the associated IMR.

[0039] The IMR may be ZP CSI-RS or NZP CSI-RS. In the existing specifications, when the CSI signal-to-noise and interference ratio (CSI-SINR, SINR based on CSI-RS) is used for L1-SINR reporting, the CSI-SINR is defined as the linear average over the power contribution [W] of resource elements (REs) carrying the CSI reference signal divided by the linear average of the power contribution [W] of noise and interference, where the interference and noise are measured over the resources indicated by the higher layer. However, the interference and noise are not clear.

[0040] For ZP-IMR, the total received power on the ZP-IMR is assumed as interference and noise.

[0041] For NZP-IMR, the signal power measured on the corresponding NZP-IMR can be assumed as interference and noise, and the sum of the "signal power measured on the corresponding NZP-IMR" and the "residual power measured on the NZP-IMR" can also be assumed as interference and noise.

[0042] Thus, interference plus noise is considered to be the total received power on the associated resource as dictated by higher layers, although this definition may differ from that in other operations.

[0043] For example, for L1-SINR, the interference is considered to be the total received power on IMR (ZP-IMR or NZP-IMR), whereas in non-L1-SINR measurements for NZP-IMR (e.g., existing (Layer 3 (L3)-) SINR measurements for CSI / CQI), the interference is the measured signal strength on NZP-IMR. This interference is different from the interference for L1-SINR.

[0044] Also, when synchronization signal signal-to-noise and interference ratio (SS-SINR, SINR based on SS) is used for L1-SINR reporting, SS-SINR is defined as the linear average over the power contribution [W] of REs carrying secondary synchronization signal (SSS) divided by the linear average of the power contribution [W] of noise and interference, where the interference and noise are measured over the resources indicated by higher layers. However, the interference and noise are not accounted for.

[0045] Unaccounted for interference measurements can result in degraded system performance, such as reduced throughput.

[0046] Therefore, the present inventors have come up with a method for appropriately measuring the SINR.

[0047] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0048] In the present disclosure, "A / B" and "at least one of A and B" may be interchangeable. In the present disclosure, cell, CC, carrier, BWP, and band may be interchangeable. In the present disclosure, index, ID, indicator, and resource ID may be interchangeable. In the present disclosure, RRC parameter, higher layer parameter, RRC information element (IE), and RRC message may be interchangeable.

[0049] In the present disclosure, CSI-RS, NZP CSI-RS, TRS, CSI-RS for tracking, CSI-RS having TRS information (higher layer parameter trs-Info), NZP CSI-RS resources in an NZP CSI-RS resource set having TRS information, repeated CSI-RS, CSI-RS configured with repetition (higher layer parameter repetition), CSI-RS with repetition, and NZP CSI-RS resources in an NZP CSI-RS resource set with repetition may be interpreted as interchangeable.

[0050] In this disclosure, SS / PBCH block, SSB, SS, and SSS may be interpreted as interchangeable.

[0051] (Wireless communication method) The following describes interference measurement in measurements based on either the CSI-RS or SS / PBCH block signal (L1-SINR measurement, non-L1-SINR measurement, CSI measurement).

[0052] <First embodiment> CSI-SINR may be defined as the linear average over the power contribution [W] of resource elements (REs) carrying CSI reference signals divided by the linear average of the power contribution [W] of noise and interference (may be obtained by dividing the linear average over the power contribution [W] of resource elements (REs) carrying CSI reference signals by the linear average of the power contribution [W] of noise and interference). If CSI-SINR is used for L1-SINR reporting, the interference and noise may be the total received power on the associated resources as indicated by higher layers. Otherwise, the interference and noise may be measured over resource elements (REs) carrying CSI-RS within the same frequency bandwidth.

[0053] For CSI measurements other than L1-SINR measurements, the UE may assume at least one or all of the following assumptions 1 to 3.

[0054] [Assumption 1] Each NZP CSI-RS port configured for interference measurement corresponds to one interference transmission layer.

[0055] [Assumption 2] All interference transmission layers on the NZP CSI-RS ports for interference measurement take into account the associated energy per resource element (EPRE) ratios.

[0056] The EPRE ratio may be set by a power offset (powerControlOffsetSS) configured via higher layer parameters (NZP-CSI-RS-Resource, CSI-ResourceConfig, NZP-CSI-RS-ResourceSet). The power offset may be a ratio of the EPRE of the NZP CSI-RS to the EPRE of the SS / PBCH block (power offset of the RE of the NZP CSI-RS to the RE of the SSS).

[0057] [Assumption 3] Other interfering signals on resource elements (REs) of an NZP CSI-RS resource for channel measurement, an NZP CSI-RS resource for interference measurement, or a CSI-IM resource for interference measurement.

[0058] As shown in Fig. 1, if the CSI measurement is an L1-SINR measurement (S10:Y), the UE may assume that the interference and noise in the L1-SINR measurement is the total received power on the associated resource indicated by the higher layer (S20).If the CSI measurement is not an L1-SINR measurement (S10:N), the UE may assume the above-mentioned Assumptions 1 to 3 for the CSI measurement (S30).

[0059] According to this embodiment, interference in at least one of L1-SINR measurement and CSI measurement can be appropriately measured.

[0060] <Second embodiment> SS-SINR may be defined as the linear average over the power contribution [W] of the resource elements (REs) carrying the SSS divided by the linear average of the power contribution [W] of the noise and interference (may be obtained by dividing the linear average over the power contribution [W] of the resource elements (REs) carrying the SSS by the linear average of the power contribution [W] of the noise and interference). If SS-SINR is used for L1-SINR reporting, the interference and noise may be the total received power on the resources indicated by the higher layers or on the associated resources indicated by the higher layers. Otherwise, the interference and noise may be measured over the resource elements (REs) carrying the SSS within the same frequency bandwidth.

[0061] In addition to the SSS, the DMRS for the PBCH may be used to determine the SS-SINR.

[0062] For CSI measurements other than L1-SINR measurements, the UE may assume at least one or all of assumptions 1 to 3 described in the first embodiment.

[0063] According to this embodiment, interference in at least one of L1-SINR measurement and CSI measurement can be appropriately measured.

[0064] (Wireless communication systems) A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of the present disclosure.

[0065] 2 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) specified by Third Generation Partnership Project (3GPP).

[0066] Furthermore, the wireless communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0067] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN) and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN and the LTE (E-UTRA) base station (eNB) is the SN.

[0068] The wireless communication system 1 may support dual connectivity between multiple base stations in the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0069] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged in the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1. A user terminal 20 may be located in at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as a base station 10.

[0070] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0071] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

[0072] Furthermore, the user terminal 20 may perform communication in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0073] The multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0074] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0075] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0076] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.

[0077] The radio access scheme may be called a waveform. In the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0078] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as a downlink channel.

[0079] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0080] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0081] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information of at least one of the PDSCH and the PUSCH.

[0082] In addition, DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and DCI for scheduling PUSCH may be called UL grant, UL DCI, etc. In addition, PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

[0083] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or multiple search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0084] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in the present disclosure may be read as interchangeable terms.

[0085] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and a scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0086] In the present disclosure, a downlink, an uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning of the channels.

[0087] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0088] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) may be called an SS / PBCH block, an SS Block (SSB), or the like. In addition, the SS, SSB, and the like may also be called a reference signal.

[0089] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may be called a user equipment specific reference signal (UE-specific reference signal).

[0090] (base station) 3 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0091] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the base station 10 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0092] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0093] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission and reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0094] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0095] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0096] The transmitting / receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0097] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0098] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0099] The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0100] The transceiver 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0101] The transceiver unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna .

[0102] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna .

[0103] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0104] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0105] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data) for the user terminal 20, control plane data, etc.

[0106] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0107] The transceiver 120 may transmit one of the following signals: a Secondary Synchronization Signal (SSS) and a Channel State Information (CSI)-Reference Signal (RS). The transceiver 120 may receive a Layer 1 (L1)-Signal to Interference and Noise Ratio (SINR) report based on the signal. The L1-SINR may be obtained by dividing a linear average over the power contributions of resource elements carrying the signal by a linear average of the power contributions of noise and interference. The noise and interference may be the total received power over resources as indicated by higher layers.

[0108] (User terminal) 4 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0109] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0110] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0111] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission / reception unit 220.

[0112] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on the common knowledge in the technical field related to the present disclosure.

[0113] The transceiver unit 220 may be configured as an integrated transceiver unit, or may be composed of a transmitter unit and a receiver unit. The transmitter unit may be composed of the transmission processing unit 2211 and the RF unit 222. The receiver unit may be composed of the reception processing unit 2212, the RF unit 222, and the measurement unit 223.

[0114] The transceiver antenna 230 may be composed of an antenna described based on the common knowledge in the technical field related to the present disclosure, such as an array antenna.

[0115] The transceiver unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0116] The transceiver unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.

[0117] The transceiver unit 220 (transmission processing unit 2211) may perform processing of the PDCP layer, processing of the RLC layer (e.g., RLC retransmission control), processing of the MAC layer (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, for example, and generate a bit sequence to be transmitted.

[0118] The transceiver 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit sequence to be transmitted, and output a baseband signal.

[0119] Whether or not to apply the DFT process may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver 220 (transmission processor 2211) may perform the DFT process as the transmission process to transmit the channel using a DFT-s-OFDM waveform, and may not perform the DFT process as the transmission process if transform precoding is enabled for the channel.

[0120] The transceiver unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna 230.

[0121] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna 230.

[0122] The transceiver 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0123] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0124] In addition, the transmitting section and the receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0125] The transceiver 220 may receive any of the following signals: a Secondary Synchronization Signal (SSS) and a Channel State Information (CSI)-Reference Signal (RS). The controller 210 may measure a Layer 1 (L1)-Signal to Interference and Noise Ratio (SINR) based on the signals. The L1-SINR may be obtained by dividing a linear average over the power contributions of resource elements carrying the signal by a linear average of the power contributions of noise and interference. The noise and interference may be the total received power on resources as indicated by higher layers.

[0126] For CSI measurements other than the L1-SINR measurement, each non-zero power (NZP) CSI-RS port configured for interference measurement may correspond to one interfering transmission layer. For CSI measurements other than the L1-SINR, all interference measurement layers on an NZP CSI-RS port for interference measurement may take into account an energy per resource element (EPRE) ratio.

[0127] For CSI measurements other than the measurement of the L1-SINR, the control unit may assume other interfering signals on resource elements of an NZP CSI-RS resource for channel measurement, an NZP CSI-RS resource for interference measurement, or a CSI-interference measurement (IM) resource for interference measurement.

[0128] The resource may be associated with the signal.

[0129] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically combined, or may be realized by using two or more devices that are physically or logically separated and directly or indirectly connected (for example, by wire, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

[0130] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission may be called a transmitting unit, a transmitter, and the like. In either case, as described above, the method of realization is not particularly limited.

[0131] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 5 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. The above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0132] In this disclosure, the terms "apparatus," "circuit," "device," "section," "unit," and the like can be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0133] For example, although only one processor 1001 is shown, there may be multiple processors. Also, the processes may be performed by one processor, or the processes may be performed by two or more processors simultaneously, sequentially, or in other manners. Also, the processor 1001 may be implemented by one or more chips.

[0134] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading a specific software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications via a communication device 1004, and controls at least one of reading and writing of data in the memory 1002 and the storage 1003.

[0135] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0136] Moreover, the processor 1001 reads out programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to the programs. As the programs, programs that cause a computer to execute at least a part of the operations described in the above-mentioned embodiments are used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks may be realized in a similar manner.

[0137] The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be called a register, a cache, a main memory (primary storage device), and the like. The memory 1002 can store a program (program code), a software module, and the like that is executable to implement a wireless communication method according to an embodiment of the present disclosure.

[0138] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0139] The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0140] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0141] In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0142] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0143] (Modification) In addition, the terms explained in this disclosure and the terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be read as mutually interchangeable. A signal may also be a message. A reference signal may also be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applied standard. A component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, etc.

[0144] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0145] Here, the numerology may be a communication parameter applied to at least one of the transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0146] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may also be a time unit based on numerology.

[0147] The slot may include a plurality of mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. Also, the mini-slot may be called a sub-slot. The mini-slot may be composed of a smaller number of symbols than the slot. The PDSCH (or PUSCH) transmitted in a time unit larger than the mini-slot may be called PDSCH (PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using the mini-slot may be called PDSCH (PUSCH) mapping type B.

[0148] The radio frame, sub-frame, slot, mini-slot, and symbol all represent time units for transmitting signals. Different names corresponding to each of them may be used. Note that the time units such as frames, sub-frames, slots, mini-slots, and symbols in this disclosure may be read interchangeably with each other.

[0149] For example, one sub-frame may be called a TTI, or a plurality of consecutive sub-frames may be called a TTI, or one slot or one mini-slot may be called a TTI. That is, at least one of the sub-frame and the TTI may be the sub-frame (1 ms) in the existing LTE, or a period shorter than 1 ms (for example, 1 - 13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, a mini-slot, etc. instead of a sub-frame.

[0150] Here, the TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) to each user terminal in TTI units. Note that the definition of the TTI is not limited to this.

[0151] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI.

[0152] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0153] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, etc.

[0154] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0155] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0156] In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. Each of one TTI, one subframe, etc. may be composed of one or more resource blocks.

[0157] In addition, one or more RBs may be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0158] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0159] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a numerology on a carrier, where the common RBs may be identified by the index of the RBs relative to a common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0160] The BWP may include a UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0161] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell", "carrier", etc. in this disclosure may be replaced with "BWP".

[0162] The above-mentioned structures of radio frames, subframes, slots, minislots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

[0163] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0164] The names used for parameters and the like in this disclosure are not limiting in any way. Furthermore, the formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

[0165] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0166] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via a plurality of network nodes.

[0167] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0168] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0169] The physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. The MAC signaling may be notified, for example, by using a MAC Control Element (CE).

[0170] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0171] The determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented as true or false, or by comparing numerical values ​​(e.g., with a predetermined value).

[0172] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0173] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0174] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0175] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," and the like may be used interchangeably.

[0176] In this disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc.

[0177] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0178] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0179] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0180] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may include a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0181] Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may be read as a side channel.

[0182] Similarly, the user terminal in the present disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0183] In the present disclosure, an operation performed by a base station may be performed by its upper node in some cases. It is clear that in a network including one or more network nodes having base stations, various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0184] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect / embodiment described in this disclosure may be reordered unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0185] Each aspect / embodiment described in the present disclosure may be implemented using any of a wide variety of standards, including Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems using 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other appropriate wireless communication methods, next-generation systems that are based on these, etc. Also, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0186] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0187] Any reference to an element using a designation such as "first," "second," etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.

[0188] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, and the like.

[0189] A "determining" may also be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.

[0190] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. That is, "determination" may be considered to be "deciding" to perform some action.

[0191] Additionally, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc.

[0192] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, may mean the nominal UE maximum transmit power, or may mean the rated UE maximum transmit power.

[0193] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0194] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, and the like, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, and the like, as some non-limiting and non-exhaustive examples.

[0195] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0196] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0197] In this disclosure, where articles have been added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0198] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modified and altered forms without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the invention according to the present disclosure.

[0199] This application is based on Japanese Patent Application No. 2020-030454, filed on February 26, 2020, the contents of which are incorporated herein in their entirety.

Claims

1. A receiver for receiving a secondary synchronization signal (SSS); A control unit that measures a layer 1 (L1)-signal to interference and noise ratio (SINR) based on the SSS, the L1-SINR is obtained by dividing a linear average over first power contributions of resource elements carrying the SSS by a linear average of second power contributions of noise and interference; the second power being a total received power on resources indicated by a higher layer; For channel state information (CSI) measurements other than the L1-SINR measurement, each of a plurality of ports of a non-zero power (NZP) CSI-reference signal (RS) resource for interference measurement corresponds to one interference transmission layer; In the CSI measurements except for the L1-SINR measurements, all interference measurement layers corresponding to the multiple ports are associated with an energy per resource element (EPRE) ratio; For the CSI measurements other than the measurement of the L1-SINR, the control unit assumes other interference signals on resource elements of the NZP CSI-RS resource for channel measurement, an NZP CSI-RS resource for interference measurement, or a CSI-interference measurement (IM) resource for interference measurement.

2. receiving a secondary synchronization signal (SSS); measuring a Layer 1 (L1)-signal to interference and noise ratio (SINR) based on the SSS; the L1-SINR is obtained by dividing a linear average over first power contributions of resource elements carrying the SSS by a linear average of second power contributions of noise and interference; the second power being a total received power on resources indicated by a higher layer; For channel state information (CSI) measurements other than the L1-SINR measurement, each of a plurality of ports of a non-zero power (NZP) CSI-reference signal (RS) resource for interference measurement corresponds to one interference transmission layer; In the CSI measurements except for the L1-SINR measurements, all interference measurement layers corresponding to the multiple ports are associated with an energy per resource element (EPRE) ratio; A wireless communication method for a terminal, in which other interference signals on resource elements of an NZP CSI-RS resource for channel measurement, an NZP CSI-RS resource for interference measurement, or a CSI-interference measurement (IM) resource for interference measurement are assumed for the CSI measurement excluding the measurement of the L1-SINR.

3. A transmitter for transmitting a secondary synchronization signal (SSS); a receiver for receiving a Layer 1 (L1)-Signal to Interference and Noise Ratio (SINR) report based on the SSS; the L1-SINR is obtained by dividing a linear average over first power contributions of resource elements carrying the SSS by a linear average of second power contributions of noise and interference; the second power being a total received power on resources indicated by a higher layer; For channel state information (CSI) measurements other than the L1-SINR measurement, each of a plurality of ports of a non-zero power (NZP) CSI-reference signal (RS) resource for interference measurement corresponds to one interference transmission layer; In the CSI measurements except for the L1-SINR measurements, all interference measurement layers corresponding to the multiple ports are associated with an energy per resource element (EPRE) ratio; A base station in which other interference signals on resource elements of an NZP CSI-RS resource for channel measurement, an NZP CSI-RS resource for interference measurement, or a CSI-interference measurement (IM) resource for interference measurement are assumed for the CSI measurements other than the measurement of the L1-SINR.

4. A system having a terminal and a base station, The terminal includes: A receiver for receiving a secondary synchronization signal (SSS); A control unit that measures a layer 1 (L1)-signal to interference and noise ratio (SINR) based on the SSS, the L1-SINR is obtained by dividing a linear average over first power contributions of resource elements carrying the SSS by a linear average of second power contributions of noise and interference; the second power being a total received power on resources indicated by a higher layer; For channel state information (CSI) measurements other than the L1-SINR measurement, each of a plurality of ports of a non-zero power (NZP) CSI-reference signal (RS) resource for interference measurement corresponds to one interference transmission layer; In the CSI measurements except for the L1-SINR measurements, all interference measurement layers corresponding to the multiple ports are associated with an energy per resource element (EPRE) ratio; For the CSI measurements other than the measurement of the L1-SINR, the control unit assumes other interference signals on resource elements of an NZP CSI-RS resource for channel measurement, an NZP CSI-RS resource for interference measurement, or a CSI-interference measurement (IM) resource for interference measurement; The base station, A transmission unit for transmitting the SSS; a receiver for receiving the L1-SINR report based on the SSS.

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