Terminal, wireless communication method, and base station

Abstract

A terminal according to an aspect of the present disclosure includes: a reception unit configured to receive a configuration of a specific index indicating a serving cell and a non-serving cell, which is different from a physical cell ID, based on the physical cell ID; and a control unit configured to control transmission of a channel state information report corresponding to the configured specific index. According to an aspect of the present disclosure, transmission or reception of a plurality of channels / signals from cells including a non-serving cell can be appropriately performed.

Description

Technical Field

[0001] This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems. Background Technology

[0002] In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) was standardized with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) was standardized with the aim of further increasing capacity and improving the height of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] The development of successor systems to LTE is also underway (e.g., also known as the 5th generation mobile communication system (5G), 5G+, the 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.).

[0004] Existing technical documents

[0005] Non-patent literature

[0006] Non-patent document 1: 3GPP TS 36.300V8.12.0 "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

[0007] The problem that the invention aims to solve

[0008] In future wireless communication systems, research is underway on layer 1 / layer 2 (L1 / L2) inter-cell mobility that is easier to manage with more efficient DL / UL beam management (achieving lower latency and overhead).

[0009] In L1 / L2 inter-cell mobility, serving cell changes can be performed using functions such as beam control without Radio Resource Control (RRC) resetting. In other words, transmission and reception with non-serving cells can be performed without handover. Since handover requires RRC reconnection, resulting in periods where data communication is impossible, L1 / L2 inter-cell mobility that does not require handover is preferred.

[0010] However, in at least one of the scenarios involving inter-cell mobility with non-serving cells and multiple TRPs, controlling the transmission or reception of channels / signals from the same cell / TRP or different cells / TRPs becomes problematic. Without proper control over the transmission and reception of channels / signals transmitted from the same cell / TRP or different cells / TRPs, there are concerns about reduced throughput or degraded communication quality.

[0011] Therefore, one of the purposes of this disclosure is to provide a terminal, wireless communication method, and base station capable of appropriately transmitting or receiving multiple channels / signals from a cell including a non-serving cell.

[0012] Methods for solving problems

[0013] The terminal involved in one aspect of this disclosure is characterized by having: a receiving unit that receives a setting of a specific index, which is different from the physical cell ID and represents a serving cell and a non-serving cell, based on the physical cell ID; and a control unit that controls the transmission of a channel state information report corresponding to the set specific index.

[0014] Invention Effects

[0015] According to one aspect of this disclosure, it is possible to appropriately transmit or receive multiple channels / signals from a cell including a non-serving cell. Attached Figure Description

[0016] Figure 1A And 1B is a diagram showing an example of the TCI state settings.

[0017] Figure 2A And 2B is a diagram illustrating an example of inter-cell mobility.

[0018] Figure 3This is a diagram showing an example of a CSI report containing information representing serving cells / non-serving cells.

[0019] Figure 4 This is a diagram illustrating the first example of the relationship between the serving cell / non-serving cell index or PCI and the new ID.

[0020] Figure 5 This is a second example of a diagram illustrating the relationship between the serving cell / non-serving cell index or PCI and the new ID.

[0021] Figure 6 This is a diagram illustrating an example of how to set up the relationship between the serving cell / non-serving cell index or PCI and the new ID.

[0022] Figure 7 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment.

[0023] Figure 8 This is a diagram illustrating an example of the structure of a base station according to one embodiment.

[0024] Figure 9 This is a diagram illustrating an example of the structure of a user terminal according to one embodiment.

[0025] Figure 10 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment. Detailed Implementation

[0026] (CSI Report)

[0027] In NR, the UE uses a specific reference signal (or the resources used by that reference signal) to measure the channel state and feeds back (reports) the Channel State Information (CSI) to the base station.

[0028] The UE can also use Channel State Information-Reference Signal (CSI-RS), Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, Synchronization Signal (SS), DeModulation Reference Signal (DMRS), etc., to measure channel state.

[0029] CSI-RS resources can also include at least one of Non-Zero Power (NZP) CSI-RS and CSI Interference Management (IM). An SS / PBCH block is a block containing synchronization signals (e.g., Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS)) and PBCH (and the corresponding DMRS), and can also be referred to as an SS block (SSB), etc. An SSB index can also be assigned to the time position of the SSB within a half-frame.

[0030] Additionally, CSI can also include Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), SS / PBCH Block Indicator (SSBRI), Layer Indicator (LI), Rank Indicator (RI), Layer 1 (L1) Reference Signal Received Power (RSRP) (the power of the reference signal received in Layer 1), L1 Reference Signal Received Quality (RSRQ), L1 Signal to Interference plus Noise Ratio (SINR), and L1 Signal to Noise Ratio (SNR). At least one of the following: Ratio (SNR) etc.

[0031] A CSI can also have multiple parts. The first part of the CSI (CSI Part 1) can also contain relatively few bits of information (e.g., RI). The second part of the CSI (CSI Part 2) can also contain relatively many bits of information, such as information determined based on CSI Part 1 (e.g., CQI).

[0032] As feedback methods for CSI, research is underway on (1) periodic CSI (P-CSI) reports, (2) aperiodic CSI (A(AP)-CSI) reports, and (3) semi-permanent CSI (SP-CSI) reports.

[0033] The UE may also be notified of information related to CSI reports (also known as CSI report configuration information) using higher-layer signaling, physical-layer signaling (e.g., downlink control information (DCI)) or a combination thereof. CSI report configuration information may also be configured, for example, using the RRC information element “CSI-ReportConfig”.

[0034] Here, higher-level signaling can be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.

[0035] MAC signaling can also use MAC Control Element (MAC CE), MAC Protocol Data Unit (MAC PDU), etc. Broadcast information can also be Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0036] CSI report configuration information may include information related to reporting period, offset, etc., which can be expressed in specific time units (slot units, subframe units, symbol units, etc.). CSI report configuration information may also include a configuration ID (CSI-ReportConfigId). This configuration ID can be used to determine the type of CSI reporting method (whether it is SP-CSI, etc.), reporting period, and other parameters. CSI report configuration information may also include information indicating which signal (or resource used by which signal) was used to report the measured CSI (CSI-ResourceConfigId).

[0037] (Beam Management)

[0038] To date, beam management (BM) methods have been under investigation in Rel-15 NR. Within this beam management, beam selection is being studied based on the L1-RSRP reported by the UE. Changing (switching) the beam of a signal / channel can also be equivalent to changing the transmission configuration indication state of that signal / channel.

[0039] Furthermore, the beam selected via beam selection can be either a transmit beam (Tx beam) or a receive beam (Rx beam). Additionally, the beam selected via beam selection can be either the UE's beam or the base station's beam.

[0040] The UE can also use PUCCH or PUSCH to report (transmit) measurement results used for beam management. These measurement results can be, for example, a CSI including at least one of L1-RSRP, L1-RSRQ, L1-SINR, L1-SNR, etc. Furthermore, these measurement results can also be referred to as beam measurement, beam measurement result, beam report, beam measurement report, etc.

[0041] CSI measurements used for beam reporting can also include interference measurements. The UE can also use resources for CSI measurements to measure channel quality, interference, etc., and derive beam reports. Resources for CSI measurements can be, for example, at least one of the following: SS / PBCH block resources, CSI-RS resources, other reference signal resources, etc. CSI measurement report configuration information can also be set for the UE using higher-layer signaling.

[0042] The beam report may also include the results of at least one of the channel quality measurements and interference measurements. The results of the channel quality measurements may include, for example, L1-RSRP. The results of the interference measurements may include L1-SINR, L1-SNR, L1-RSRQ, and other interference-related metrics (e.g., any metric other than L1-RSRP).

[0043] Additionally, the resources used for CSI measurements for beam management can also be referred to as beam measurement resources. Furthermore, the signal / channel of the CSI measurement object can also be referred to as a beam measurement signal. Moreover, CSI measurement / reporting can also be replaced by at least one of the following: measurement / reporting for beam management, beam measurement / reporting, wireless link quality measurement / reporting, etc.

[0044] Regarding the CSI report settings for beam management of NR that take into account the current situation, these are included in the RRC information element "CSI-ReportConfig". The information within the RRC information element "CSI-ReportConfig" will be explained below.

[0045] CSI report configuration information (CSI-ReportConfig) can also include information about the parameters to be reported, i.e., report quantity information (which can also be expressed as "report quantity" or the RRC parameter "reportQuantity"). Report quantity information is defined using an ASN.1 object type such as "choice". Therefore, one of the parameters specified as report quantity information (cri-RSRP, ssb-Index-RSRP, etc.) is set.

[0046] UEs with high-level parameters (e.g., RRC parameter "groupBasedBeamReporting") set to enabled in the CSI report configuration information can also include multiple beam measurements with resource IDs (e.g., SSBRI, CRI) and their corresponding measurement results (e.g., L1-RSRP) in the beam report for each report configuration.

[0047] UEs that have set more than one number of reporting object RS resources through the high-layer parameters (e.g., RRC parameter "nrofReportedRS") included in the CSI report setting information can also include more than one beam measurement resource ID and more than one corresponding measurement result (e.g., L1-RSRP) in the beam report for each report setting.

[0048] (TCI, Spatial Relations, QCL)

[0049] In NR, research is underway on controlling the reception processing (e.g., at least one of receiving, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmitting, mapping, precoding, modulation, and encoding) of at least one of the signals and channels (referred to as signal / channel) in the UE based on the Transmission Configuration Indication state (TCI state).

[0050] TCI states can also represent the states of signals / channels applied to the downlink. States equivalent to the TCI states of signals / channels applied to the uplink can also be described as spatial relations.

[0051] The TCI status refers to information related to the quasi-co-location (QCL) of a signal / channel, and can also be called spatial reception parameters, spatial relation information, etc. The TCI status can also be set for the UE on a per-channel or per-signal basis.

[0052] QCL is an indicator that describes the statistical properties of a signal / channel. For example, it can also mean that if a signal / channel has a QCL relationship with other signals / channels, it can be assumed that at least one of the following is the same among these different signals / channels: Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter).

[0053] Additionally, the spatial reception parameters may also correspond to the UE's receive beam (e.g., receive analog beam), and the beam may also be determined based on the spatial QCL. The QCL (or at least one element of the QCL) in this disclosure may also be replaced with sQCL (spatial QCL).

[0054] Regarding QCL, multiple types (QCL types) can also be specified. For example, four QCL types AD can be set, in which the parameters (or parameter sets) that can be assumed to be the same are different. The parameters (also referred to as QCL parameters) are represented as follows:

[0055] • QCL Type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread.

[0056] • QCL Type B (QCL-B): Doppler shift and Doppler extension.

[0057] • QCL Type C (QCL-C): Doppler shift and average delay,

[0058] • QCL type D (QCL-D): Space reception parameters.

[0059] The situation in which a UE envisions a specific Control Resource Set (CORESET), a channel or reference signal, and other CORESETs, or a channel or reference signal, being in a specific QCL (e.g., QCL type D), can also be referred to as a QCL assumption.

[0060] The UE may also determine at least one of the transmit beam (Tx beam) and receive beam (Rx beam) of the signal / channel based on the TCI state or QCL assumption of the signal / channel.

[0061] TCI status can also be, for example, information related to the QCL between the target channel (in other words, the reference signal (RS) used by the channel) and other signals (e.g., other RS). TCI status can also be set (indicated) by higher-layer signaling, physical-layer signaling, or a combination thereof.

[0062] In this disclosure, higher-level signaling may be, for example, any one or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc.

[0063] MAC signaling can also use MAC Control Element (MAC CE) or MAC Protocol Data Unit (PDU). Broadcast information can also be, for example, Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), or Other System Information (OSI).

[0064] Physical layer signaling can also be, for example, downlink control information (Downlink Control Information (DCI)).

[0065] The channel that is set (specified) to TCI state or spatial relationship can be, for example, at least one of the following: downlink shared channel (Physical Downlink Shared Channel (PDSCH))), downlink control channel (Physical Downlink Control Channel (PDCCH))), uplink shared channel (Physical Uplink Shared Channel (PUSCH))), and uplink control channel (Physical Uplink Control Channel (PUCCH))).

[0066] Furthermore, the RS that is related to the channel as QCL can be at least one of the following: a Synchronization Signal Block (SSB), a Channel State Information Reference Signal (CSI-RS), a Measurement Reference Signal (Sounding Reference Signal (SRS)), a Tracking CSI-RS (also known as a Tracking Reference Signal (TRS)), or a QCL Detection Reference Signal (also known as a QRS).

[0067] An SSB is a block of signals that contains at least one Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and broadcast channel (Physical Broadcast Channel (PBCH)). An SSB can also be referred to as an SS / PBCH block.

[0068] The TCI state information element ("TCI-state IE" in RRC) set via higher-layer signaling may also contain one or more QCL information ("QCL-Info"). The QCL information may also contain at least one information related to the RS that forms a QCL relationship (RS relationship information) and information indicating the QCL type (QCL type information). The RS relationship information may also contain information such as the RS index (e.g., SSB index, Non-Zero-Power (NZP) CSI-RS resource ID (identifier)), the cell index of the RS, and the index of the Bandwidth Part (BWP) of the RS.

[0069] In Rel.15NR, as a TCI state of at least one of PDCCH and PDSCH, either the RS of QCL type A or the RS of QCL type D, or only the RS of QCL type A, can be set to the UE.

[0070] When the RS is set as QCL type A, it is assumed that the TRS is different from the DeModulation Reference Signal (DMRS) of the PDCCH or PDSCH, and the same TRS is periodically transmitted for a long time. The UE can measure the TRS and calculate the average delay, delay spread, etc.

[0071] A UE whose TRS is set as a QCL type A RS in the TCI state of the DMRS of the PDCCH or PDSCH can assume that the parameters (average delay, delay spread, etc.) of the DMRS of the PDCCH or PDSCH are the same as those of the QCL type A of the TRS. Therefore, it can calculate the type A parameters (average delay, delay spread, etc.) of the DMRS of the PDCCH or PDSCH based on the measurement results of the TRS. When performing channel estimation for at least one of the PDCCH and PDSCH, the UE can use the measurement results of the TRS to perform more accurate channel estimation.

[0072] A UE with a QCL type D RS can use the QCL type D RS to determine the UE receive beam (spatial domain receive filter, UE spatial domain receive filter).

[0073] The RS of QCL type X in TCI state can also refer to the RS that is in a relationship of QCL type X with a certain channel / signal (DMRS), and this RS can also be called the QCL source of QCL type X in TCI state.

[0074] (Unified / Common TCI Framework)

[0075] According to the unified TCI framework, the channels of UL and DL can be controlled through a common framework. Regarding the unified TCI framework, instead of specifying TCI states or spatial relationships for each channel as in Rel.15, it can both indicate a common beam (common TCI state) and apply it to all channels of UL and DL, or apply the common beam used by UL to all channels of UL and the common beam used by DL to all channels of DL.

[0076] We are researching a common beam for both DL and UL, or a common beam for DL ​​and a common beam for UL (integrated as two common beams).

[0077] The UE can also envision the same TCI state for both UL and DL (joint TCI state, joint TCI pool, joint common TCI pool). The UE can also envision different TCI states for UL and DL respectively (separate TCI state, separate TCI pool, UL separate TCI pool and DL separate TCI pool, separate common TCI pool, UL common TCI pool and DL common TCI pool).

[0078] It is also possible to align the default beams of UL and DL through MAC CE-based beam management (MAC CE-level beam indication). The default TCI state of the PDSCH can also be updated to match the default UL beam (spatial relationship).

[0079] Alternatively, a common beam / unified TCI state can be indicated from the same TCI pool (joint common TCI pool, joint TCI pool, set) used by both UL and DL via DCI-based beam management (DCI-level beam indication). M (>1) TCI states can also be activated via MACCE. UL / DL DCI can also select one from the M activated TCI states. The selected TCI state can also be applied to the channels / RS of both UL and DL.

[0080] A TCI pool (set) can be either multiple TCI states set via RRC parameters, or multiple TCI states activated via MAC CE (activating a TCI state, activating a TCI pool, or a set) from among multiple TCI states set via RRC parameters. Each TCI state can also be a QCL type A / D RS. As a QCL type A / D RS, it can also be set as SSB, CSI-RS, or SRS.

[0081] exist Figure 1A In the example, the RRC parameter (information element) sets multiple TCI states for both DL and UL. MACCE can also activate multiple TCI states among the set TCI states. DCI can also indicate one of the activated TCI states. DCI can also be UL / DL DCI. The indicated TCI state can also be applied to at least one (or all) of the UL / DL channel / RS. A DCI can also indicate both UL TCI and DL TCI.

[0082] exist Figure 1A In the example, a point can be either a TCI state applied to both UL and DL, or two TCI states applied to UL and DL respectively.

[0083] At least one of the multiple TCI states set by RRC parameters and the multiple TCI states activated by MAC CE can also be referred to as a TCI pool (common TCI pool, joint TCI pool, TCI state pool). Multiple TCI states activated by MAC CE can also be referred to as an activated TCI pool (activated common TCI pool).

[0084] Furthermore, in this disclosure, the high-level parameters (RRC parameters) for setting multiple TCI states can also be referred to as setting information for setting multiple TCI states, or simply as "setting information". Additionally, in this disclosure, using a DCI to indicate one of the multiple TCI states can either involve receiving indication information contained in the DCI indicating one of the multiple TCI states, or it can involve only receiving the "indication information".

[0085] exist Figure 1B In the example, the RRC parameter sets multiple TCI states (joint common TCI pool) for both DL and UL. MAC CE can also activate multiple TCI states among the set TCI states (activate TCI pool). It can also be set / activated for UL and DL respectively (different, separate) activated TCI pools.

[0086] The DL DCI or new DCI format can also select (indicate) more than one (e.g., one) TCI state. The selected TCI state can also be applied to more than one (or all) DL channels / RS. The DL channel can also be PDCCH / PDSCH / CSI-RS. The UE can also use the Rel.16 TCI state operation (TCI framework) to determine the TCI state of each DL channel / RS. The UL DCI or new DCI format can also select (indicate) more than one (e.g., one) TCI state. The selected TCI state can also be applied to more than one (or all) UL channels / RS. The UL channel can also be PUSCH / SRS / PUCCH. Thus, different DCIs can indicate both UL TCI and DL DCI separately.

[0087] The existing DCI format 1_2 / 1_2 can also be used to indicate the public TCI status.

[0088] The public TCI framework can also have different TCI states for DL ​​and UL.

[0089] The common TCI framework can also have different TCI states for DL ​​and UL. It is not preferable to use DCI format 1_1 / 1_2 to indicate the common TCI state for UL only.

[0090] (Inter-cell mobility)

[0091] However, in NR, DL transmission to the UE via one or more Transmission / Reception Points (TRPs) (Multi-TRPs (MTRPs)) is being investigated. Furthermore, UL transmission to one or more TRPs via the UE is also being investigated.

[0092] Considering inter-cell mobility (e.g., L1 / L2 inter-cell mobility), the UE receives channels / signals from multiple cells / TRPs (see reference). Figure 2A B).

[0093] Figure 2AAn example of inter-cell mobility involving a non-serving cell (e.g., inter-cell mobility with a single TRP) is shown. A single TRP can also refer to the case where only one of multiple TRPs transmits to the UE (also known as single-mode). The CORESET pool index can also represent a single TRP. Here, a case is shown where the UE receives channels / signals from a base station / TRP of cell #1, which becomes the serving cell, and from a base station / TRP of cell #3, which becomes a non-serving cell (non-serving cell / non-operating cell). For example, this is equivalent to the UE switching / changing from cell #1 to cell #3 (e.g., fast cell switch).

[0094] In this case, the TCI status can also be updated via DCI / MAC CE, and the selection of ports (e.g., antenna ports) / TRPs / points can be performed dynamically. Different physical cell IDs (e.g., PCIs) are assigned to cells #1 and #3.

[0095] Figure 2B An example of a multi-TRP scenario (e.g., inter-cell mobility utilizing multiple TRPs) is shown. Here, the case where the UE receives channels / signals from TRP#1 and TRP#2 is shown. Here, the case where TRP#1 exists in cell #1 (PCI#1) and TRP#2 exists in cell #2 (PCI#2) is shown.

[0096] Multiple TRPs (TRP #1, #2) can also be connected via ideal / non-ideal backhaul and exchange information and data. Different codewords (CWs) and different layers can also be sent from each TRP within a multi-TRP network. As one method of multi-TRP transmission, such as... Figure 1B As shown, non-coherent joint transmission (NCJT) can also be used. Here, the case of NCJT being performed between multiple cells (e.g., cells with different PCIs) is illustrated. Additionally, the same serving cell settings can be applied / configured for TRP#1 and TRP#2.

[0097] In NCJT, for example, TRP#1 modulates and maps the first codeword, and performs layer mapping, using the first precoding on a first number of layers (e.g., 2 layers) to transmit the first signal / channel (e.g., PDSCH). Furthermore, TRP#2 modulates and maps the second codeword, and performs layer mapping, using the second precoding on a second number of layers (e.g., 2 layers) to transmit the second signal / channel (e.g., PDSCH).

[0098] Multiple PDSCHs (multiple PDSCHs) of NCJT can also be defined as partially or completely overlapping in terms of at least one of the time and frequency domains. That is, at least one of the time and frequency resources of the first PDSCH from TRP#1 and the second PDSCH from TRP#2 can also overlap.

[0099] It can also be envisioned that these first PDSCHs and second PDSCHs are not in a quasi-co-location (QCL) relationship (not quasi-co-located). The reception of multiple PDSCHs can also be replaced by the simultaneous reception of PDSCHs that are not of a certain QCL type (e.g., QCL type D).

[0100] Multiple PDSCHs from multiple TRPs (also known as multiple PDSCHs) can be scheduled using a single DCI (single DCI, single PDCCH) (single-master mode). A single DCI can also be sent from a single TRP within a multiple TRP. A structure utilizing a single DCI in a multiple TRP can also be called a single-DCI-based multiple TRP (mTRP / MTRP).

[0101] It can also be applied to a situation where each of the multiple TRPs sends a portion of the control signal to the UE, and the multiple TRPs send data signals (which can also be called master-slave mode).

[0102] Multiple PDSCHs from multiple TRPs can also be scheduled separately using multiple DCIs (multiple DCIs (M-DCI) or multiple PDCCHs (multiple PDCCH)) (multi-master mode). Multiple DCIs can also be sent separately from multiple TRPs. The structure utilizing multiple DCIs in a multiple TRP can also be called a multiple TRP based on multiple DCIs (mTRP / MTRP).

[0103] The UE can also be envisioned as sending different CSI reports related to different TRPs. Such CSI feedback can also be referred to as separate feedback, separate CSI feedback, etc. In this disclosure, "separate" and "independent" can be used interchangeably.

[0104] A mechanism using the TCI states of Rel. 15 / 16 is being investigated for inter-cell mobility using multiple TRPs, and a new mechanism is being investigated for inter-cell mobility using a single TRP. In the TCI state mechanism of Rel. 15 / 16, the TCI state as PDSCH / PDCCH (DMRS of PDSCH / PDCCH) can set the CSI-RS (TCI state of PDSCH / PDCCH refers to CSI-RS). Furthermore, the TCI state as CSI-RS can set the SSB. However, the TCI state as PDSCH / PDCCH cannot directly set the SSB. In the new mechanism of Rel. 17 (inter-cell mobility using a unified TCI state), the setting of the SSB as the TCI state of PDSCH / PDCCH is being investigated.

[0105] In addition, the settings X as the TCI state of PDSCH / DCCH, the TCI state reference X of PDSCH / PDCCH, and the QCL source X of PDSCH / PDCCH can also be interchanged.

[0106] In future wireless communication systems, inter-cell mobility (L1 / L2 inter-cell mobility) as described above is being investigated for easier and more efficient DL / UL beam management (achieving lower latency and overhead).

[0107] In L1 / L2 inter-cell mobility, serving cell changes can be performed using functions such as beam control without RRC resetting. In other words, transmission and reception with non-serving cells can be performed without handover. Since handover requires RRC reconnection, resulting in periods where data communication is impossible, L1 / L2 inter-cell mobility that does not require handover is preferred.

[0108] However, in at least one of the scenarios involving inter-cell mobility with non-serving cells and multiple TRPs, controlling the transmission or reception of channels / signals from the same cell / TRP or different cells / TRPs becomes problematic. Without proper control over the transmission and reception of channels / signals transmitted from the same cell / TRP or different cells / TRPs, there are concerns about reduced throughput or degraded communication quality.

[0109] Therefore, the inventors of this invention have conceived of control for the appropriate transmission or reception of multiple channels / signals from a cell containing a non-serving cell.

[0110] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods involved in each embodiment can be applied individually or in combination.

[0111] In this disclosure, CSI reports and beam reports are interchangeable. Reports and measurements are also interchangeable.

[0112] In this disclosure, panel, uplink (UL) transmitting entity, point, TRP, spatial relationship, control resource set (CORESET), PDSCH, codeword, base station, antenna port of a signal (e.g., DeModulation Reference Signal (DMRS) port), antenna port group of a signal (e.g., DMRS port group), group for multiplexing (e.g., Code Division Multiplexing (CDM) group, reference signal group, CORESET group), CORESET pool, CORESET subset, CW, redundancy version (RV)), and layer (MIMO layer, transmitting layer, spatial layer) can also be interchanged. Furthermore, panel identifier (Identifier (ID)) and panel can also be interchanged. In this disclosure, TRP index, TRP ID, CORESET pool index, ordinal numbers of two TCI states (first, second), and TRP can also be interchanged.

[0113] In this disclosure, TCI state, common beam, common TCI, common TCI state, unified TCI, unified TCI state, UL TCI, DL TCI, joint TCI state, joint UL / DL TCI state, TCI state applicable in DL and UL, TCI state applicable in multiple channels / RS, TCI state applicable in multiple channels / RS, and PL-RS can also be interchanged.

[0114] In this disclosure, TCI states, multiple TCI states set via RRC, multiple TCI states activated via MAC CE, pools, TCI state pools, activated TCI state pools, common TCI state pools, joint TCI state pools, individual TCI state pools, common TCI state pools for UL, common TCI state pools for DL, common TCI state pools set / activated via RRC / MAC CE, and TCI state information can also be interchanged.

[0115] In this disclosure, beam, spatial domain filter, spatial setting, TCI state, UL TCI state, unified TCI state, unified beam, common TCI state, common beam, TCI concept, QCL concept, QCL parameter, spatial domain receive filter, UE spatial domain receive filter, UE receive beam, DL beam, DL receive beam, DL precoder, DL precoder, DL-RS, RS of QCL type D in TCI state / QCL concept, RS of QCL type A in TCI state / QCL concept, spatial relationship, spatial domain transmit filter, UE spatial domain transmit filter, UE transmit beam, UL beam, UL transmit beam, UL precoder, UL precoder, and PL-RS can also be interchanged. In this disclosure, QCL type X-RS, DL-RS associated with QCL type X, DL-RS having QCL type X, source of DL-RS, SSB, CSI-RS, and SRS can also be interchanged.

[0116] In this disclosure, a single TRP, a channel using a single TRP, a channel using a single TCI state / spatial relationship, multiple TRPs not activated via RRC / DCI, multiple TCI states / spatial relationships not activated via RRC / DCI, a CORESET pool index value not set to 1 for any CORESET, and no code points in the TCI field being mapped to two TCI states can also be interchanged.

[0117] In this disclosure, multiple TRPs, channels using multiple TRPs, channels using multiple TCI state / spatial relationships, multiple TRPs activated by RRC / DCI, multiple TCI state / spatial relationships activated by RRC / DCI, multiple TRPs based on a single DCI, and at least one of multiple TRPs based on multiple DCIs can also be interchanged.

[0118] In this disclosure, cell, CC, carrier, BWP, and band can be interchanged.

[0119] In this disclosure, index, ID, indicator, and resource ID can be used interchangeably.

[0120] In this disclosure, “A / B” can also be replaced with “at least one of A and B”.

[0121] In this disclosure, CSI report settings (CSI-ReportConfig) and CSI reportsetting can be interchanged. CSI resource settings (CSI-ResourceConfig) and CSI resource settings (CSIresource setting) can also be interchanged.

[0122] In this disclosure, RS, beam, measurement result, and RS setting can be used interchangeably. RS can also refer to at least one of CRI and SSBRI in the CSI report. L1-RSRP and L1-SINR can also be used interchangeably. SSB, SSB index, and SSBRI can also be used interchangeably.

[0123] (Wireless communication method)

[0124] The UE can also receive settings for a specific index (the new ID described below) that is different from the physical cell ID (Physical Cell Identifier (PCI)) and represents the serving cell and non-serving cell, and control the transmission of the channel state information report (CSI report) corresponding to the set specific index.

[0125] <CSI Report Based on New ID>

[0126] [1-bit indicator]

[0127] A 1-bit indicator representing the serving cell / non-serving cell can also be used. For example, "0" can represent the serving cell and "1" can represent the non-serving cell. Alternatively, "1" can represent the serving cell and "0" can represent the non-serving cell.

[0128] [New ID]

[0129] As information indicating serving / non-serving cells, new IDs (e.g., a re-indexed (re-indexed, re-numbered) index representing a non-serving cell, or a CMR group ID) or PCIs (the directly used PCIs) can also be applied. The new IDs can also be set only for the serving and non-serving cells used by the UE. That is, the new IDs are fewer than the sum of the serving and non-serving cell IDs or the PCIs, thus reducing the number of bits.

[0130] The new ID can also rely on RS configuration signaling (CSI report configuration / CSI resource configuration). For example, the new ID could be "0" for the serving cell, "1" for non-serving cell #1, and "2" for non-serving cell #2. That is, the new ID can also represent the serving cell and any one of more than one non-serving cell.

[0131] The reconstructed index of a non-serving cell can also be associated with a portion of the PCI. By using this reconstructed index instead of the PCI, the number of information bits is reduced, thus decreasing the overhead of RRC signaling. The reconstructed index can also be referred to as a reconstructed index.

[0132] In the case of a single non-serving cell, the new ID can also contain the same information as the 1-bit indicator mentioned above. That is, the new ID can also refer to the 1-bit indicator mentioned above. The parameter name of the new ID is not limited to "NewID" and can use any name.

[0133] [CSI Report]

[0134] When the UE receives the same CSI report setting / CSI resource setting that includes both the RS (e.g., SSB) setting of the serving cell and the RS (e.g., SSB) setting of the non-serving cell, it can control the transmission (reporting) of a CSI report containing information indicating the serving cell / non-serving cell (corresponding to that information) in addition to the previous report content. This information represents the reference signal / measurement result, information related to the serving cell or non-serving cell, such as the aforementioned 1-bit indicator, a new ID, etc. The report content can also be at least one of the following: SSB index, CRI, L1-RSRP, L1-SINR, L1-SNR, LI, RI, PMI, CQI.

[0135] For example, the UE can also use a new ID to set multiple non-serving cells through different RRC parameters, and set L1 beam reports (CSI reports) for multiple non-serving cells. Then, it can also select one of the multiple non-serving cells and set the TCI status.

[0136] Figure 3 This is a diagram showing an example of a CSI report containing information representing serving / non-serving cells. Figure 3 In this context, the 1-bit indicator (1-bit indicator) or a new ID (new ID) representing the serving cell / non-serving cell is used, as described above. For example... Figure 3As shown, "1-bit indicator" or "new ID" corresponds to "CRI or SSBRI#X" (X = 1 to N), respectively.

[0137] <First Implementation>

[0138] UE mobility within a small cell where a single transmit / receive point (single TRP) is applied (e.g., reference) Figure 2A or inter-cell mobility of multiple transmit and receive points (multiple TRPs) (e.g., reference) Figure 2B In the case of a TCI state corresponding to and containing the cell index (PCI / serving cell index / new ID), the UE can also receive the TCI state (or receive the TCI state together with the cell index). This TCI state can also be a unified TCI state. The UE can also determine that this TCI state corresponds to / is associated with the cell index. This TCI state can also be a TCI state with the received cell index or a cell index corresponding to / associated with the cell index as the QCL source. Regarding this TCI state, the UE can also determine that a channel / signal is being transmitted from a cell with a cell index corresponding to / associated with the cell index (received cell index).

[0139] Below, inter-cell mobility of a single TRP (e.g., referring to...) Figure 2A ) or inter-cell mobility of multiple TRPs (e.g., referencing Figure 2B This is often referred to as inter-cell mobility. Sometimes, at least one of the following—PCI, serving cell index / non-serving cell index, or the new ID—is called the cell index.

[0140] In single-TRP / multi-TRP inter-cell mobility, the cell index can also be transmitted in the CSI-RS resources (resourcesForChannelMeasurement (CMR)) corresponding to the CSI report of the L1-RSRP / SINR (or the cell index can also be transmitted together with the CMR). The UE can also determine that the L1-RSRP / SINR measured using the CMR corresponds to / is associated with the cell index. The L1-RSRP / SINR can also be an L1-RSRP / SINR with the cell index or a cell index corresponding to / associated with the cell index as the QCL source. The UE can also determine that the L1-RSRP / SINR is an L1-RSRP / SINR from a cell (other cells) with a cell index corresponding to / associated with the cell index (received cell index).

[0141] <Second Implementation>

[0142] The bit size (number of bits) of the new ID can also correspond to the number of non-serving cells (number of non-serving cell IDs, number of PCIs) set by higher-layer signaling, etc. For example, the number of bits N is determined by the following equation (1). In addition, ceil(X) represents the smallest integer greater than or equal to X.

[0143] N = ceil(log2(number of non-serving cells + 1))

[0144] In equation (1) above, "+1" corresponds to the serving cell (this cell). For example, if the number of non-serving cells is 3, then 2 bits can be used to represent the serving cell and the three non-serving cells (non-serving cell #1, non-serving cell #2, and non-serving cell #3).

[0145] The upper limit on the number of cells that can be supported can also be specified in the specification (e.g., four cells including the current cell). This is to prevent the UE from becoming "UE-impossible" due to factors such as an excessively large number of bits in the new ID or an increase in the number of cells that the UE needs to perform L1 measurements.

[0146] Another simple method for supporting the setting of TCI states associated with non-serving cells is to directly set the PCI in the QCL / TCI state. However, setting the PCI directly in the QCL / TCI state increases the overhead of RRC. 10 bits of RRC signaling are used for each PCI. With 64 TCI state settings from non-serving cells, this consumes 640 bits of cost. Furthermore, when setting the SSB of a non-serving cell in L1 beam measurement / reporting, each CMR for the SSB of the non-serving cell uses 10 bits, thus further increasing the total overhead.

[0147] On the other hand, a new ID can be created based on the PCI, and the QCL / TCI status / CMR can be used instead to set the new ID. In the new ID, if there is only one non-serving cell, a new ID of 1 bit is sufficient to represent the non-serving cell, and a new ID of 2 bits is sufficient to represent a maximum of three non-serving cells. By creating a new ID based on the PCI, signaling overhead can be significantly reduced.

[0148] In the case of inter-cell mobility at L1 / L2 centers, it is preferable to import a new ID representing non-serving cell information associated with TCI status / QCL information (e.g., a re-indexed non-serving cell ID). The link between the PCI and the new ID can also be configured via higher-layer signaling. The bit size of the new ID can also be determined by the number of non-serving cells supported in the cell (component carrier).

[0149] The UE can also support multiple non-serving cells being configured in the CC. It can also support setting a maximum of one non-serving cell based on a re-indexed configuration to associate it with the CC's TCI / QCL structure.

[0150] According to this embodiment, an appropriate number of bits can be set for a new ID, thus suppressing overhead.

[0151] <Third Implementation Method>

[0152] [Method 3-1]

[0153] The UE can also receive the relationship between the serving cell / non-serving cell index or PCI and the new ID via higher-layer signaling (this relationship can also be set via higher-layer signaling). For example, this relationship can also be set via RRC and updated via MAC CE. Updating via MAC CE eliminates the need for RRC resetting, enabling cell handovers between a large number of cells. If a large number of non-serving cells are set from the beginning via RRC, no RRC reconnection is required (in an extreme case, setting 1007 non-serving cells), but the number of bits in the new ID increases, or the number of cells the UE needs to measure in the L1 beam increases, increasing the UE load.

[0154] The UE can also measure the CMR of the configured serving cell / non-serving cell index or the serving cell index corresponding to the PCI to perform L1-RSRP / SINR beam reporting (CSI reporting). In addition, the TCI status or unified TCI status of the configured non-serving cell index or the serving cell index corresponding to the PCI can also be configured.

[0155] Figure 4 This is a diagram illustrating the first example of the relationship between the serving cell / non-serving cell index or PCI and the new ID. For example, it can also be explicitly set via higher-layer signaling, etc. Figure 4 Examples of non-serving cells or PCI relationships with new IDs.

[0156] Specific methods (sequences) can also be used to define (set) the relationship between the serving cell / non-serving cell index or PCI and the new ID. For example, a smaller non-serving cell index (PCI) can be assigned a smaller new ID (e.g., refer to...). Figure 5 Alternatively, the larger the non-serving cell's index (PCI), the smaller the new ID it can be assigned. The serving cell can also always be assigned the same new ID (e.g., 0).

[0157] Figure 5 This is a second example of a diagram illustrating the relationship between the serving cell / non-serving cell index or PCI and the new ID. Figure 5In the example, the smaller the PCI of the non-serving cell, the smaller the new ID is assigned. For example, when the PCI of the non-serving cell is set to 124, 51, and 1005, the non-serving cell with PCI of 51 is assigned a new ID=1, the non-serving cell with PCI of 124 is assigned a new ID=2, and the non-serving cell with PCI of 1005 is assigned a new ID=3.

[0158] [Method 3-2]

[0159] The UE can also receive a MAC CE for activating (limiting, selecting, determining) at least one of a plurality of serving cell / non-serving cell indices or PCIs (candidates of serving cell / non-serving cell indices or PCIs) received via higher-layer signaling (RRC). The activated serving cell / non-serving cell index or PCI (candidate) can also correspond to a new ID.

[0160] Before being activated by MAC CE, the UE can either be set not to assume a non-serving cell (performing operations without assuming a non-serving cell), or it can choose to use a specific non-serving cell. For example, it can also assume a non-serving cell corresponding to the new ID=1, 2, 3.

[0161] Figure 6 This is a diagram illustrating an example of how to configure the relationship between the serving cell / non-serving cell index or PCI and the new ID. Figure 6 In the example shown, the UE is configured with the serving cell and non-serving cells #1 to #7 via RRC, and a portion of them are activated via MAC CE. Figure 6 In the example, the activated non-serving cell #1 (PCI=124), non-serving cell #1 (PCI=24), and non-serving cell #1 (PCI=456) are all active. Additionally, the serving cell can also be activated via MAC CE, and even if the serving cell is not activated via MAC CE, a new ID can still be assigned.

[0162] exist Figure 6 The example shows how new IDs corresponding to PCIs are set in the order configured via RRC. However, similar to method 3-2, smaller new IDs can also be set for non-serving cells with smaller PCIs. For example, a new ID of 1 could be set for PCI=24, a new ID of 2 could be set for PCI=124, and a new ID of 3 could be set for PCI=456.

[0163] According to this implementation, an appropriate number of new IDs can be set / activated without being limited to the number of PCIs, thus suppressing overhead.

[0164] <UE Capability>

[0165] The examples of this disclosure can also be applied based on at least one of reporting (sending) the corresponding UE capability (UE capability information) or setting the corresponding higher-layer signaling (RRC parameters). The UE capability can be, for example, the following (1) to (5), but is not limited to the following examples, and can also use UE capabilities that indicate whether or not the examples of this disclosure are supported.

[0166] (1) Does the UE support single TRP or multiple TRP functions (L1 / L2 inter-cell mobility)?

[0167] (2) In L1 / L2 inter-cell mobility, what is the number of TCI states (or the total number of TCI states for both serving and non-serving cells) from each CC (or all CCs as a whole, or all CCs in each band) that can be set via RRC? Additionally, the number of TCI states set via RRC can also be associated with the UE's storage function.

[0168] (3) In L1 / L2 inter-cell mobility, what is the number of TCI states (or the total number of TCI states for both serving and non-serving cells) from each CC (or all CCs, or all CCs in each band) that can be activated via MAC CE? Additionally, the number of TCI states activated via MAC CE can also be correlated with the UE's processing capacity.

[0169] (4) The number of non-serving cells (the number of different PCIs) that the UE can support in L1 / L2 inter-cell mobility in each CC (or between all CCs, or between all CCs in each band).

[0170] (5) Whether dynamic changes to the DCI level of the serving cell are supported. If not, the UE can only support dynamic changes to the MAC CE level of the serving cell (which is slower than DCI).

[0171] (Wireless Communication System)

[0172] The structure of a wireless communication system according to one embodiment of this disclosure will now be described. 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 this disclosure.

[0173] Figure 7This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment. The wireless communication system 1 can also be a system that uses Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) as standardized by the Third Generation Partnership Project (3GPP).

[0174] Furthermore, the wireless communication system 1 can also support dual connectivity between multiple radio access technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC can also 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)), etc.

[0175] 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.

[0176] Wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (e.g., MN and SN are dual connectivity of NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0177] The wireless communication system 1 may also include a base station 11 forming a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a-12c) configured within the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. The user terminal 20 may also be located within at least one cell. The configuration and number of each cell and the user terminal 20 are not limited to the arrangement shown in the figure. Hereinafter, without distinguishing between base stations 11 and 12, they will be collectively referred to as base station 10.

[0178] User terminal 20 may also connect to at least one of multiple base stations 10. User terminal 20 may also utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0179] Each CC can also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). Macro cell C1 can also be included in FR1, and small cell C2 can also be included in FR2. For example, FR1 can also be a frequency band below 6 GHz (sub-6 GHz), and FR2 can also be a frequency band above 24 GHz (above-24 GHz). Furthermore, the frequency bands and definitions of FR1 and FR2 are not limited to these; for example, FR1 can also be equivalent to a frequency band higher than FR2.

[0180] In addition, user terminal 20 can also use at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) to communicate in each CC.

[0181] Multiple base stations 10 can also be connected via wired (e.g., fiber optic cable based on the Common Public Radio Interface (CPRI), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, base station 11, which is equivalent to a host station, can also be referred to as an Integrated Access Backhaul (IAB) donor, and base station 12, which is equivalent to a relay station, can also be referred to as an IAB node.

[0182] Base station 10 may also be connected to core network 30 via other base stations 10 or directly. Core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0183] User terminal 20 can also be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0184] In wireless communication system 1, wireless access methods based on Orthogonal Frequency Division Multiplexing (OFDM) can also be used. For example, in at least one of the downlink (DL) and uplink (UL) links, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA) can also be used.

[0185] The wireless access method can also be referred to as a waveform. In addition, in the wireless communication system 1, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be used in the wireless access methods of UL and DL.

[0186] As a downlink channel, the wireless communication system 1 can also use downlink shared channels (Physical Downlink Shared Channel (PDSCH)), broadcast channels (Physical Broadcast Channel (PBCH)), downlink control channels (Physical Downlink Control Channel (PDCCH)) and so on, which are shared by each user terminal 20.

[0187] In addition, as uplink channels, the wireless communication system 1 may also use uplink shared channels (Physical Uplink Shared Channel (PUSCH)), uplink control channels (Physical Uplink Control Channel (PUCCH)), random access channels (Physical Random Access Channel (PRACH)) and so on, which are shared by each user terminal 20.

[0188] User data, high-level control information, and System Information Blocks (SIBs) are transmitted via the PDSCH. User data and high-level control information can also be transmitted via the PUSCH. Furthermore, the Master Information Block (MIB) can also be transmitted via the PBCH.

[0189] Lower-layer control information can also be transmitted via PDCCH. Lower-layer control information may include, for example, downlink control information (DCI), which includes scheduling information for at least one of PDSCH and PUSCH.

[0190] Additionally, the DCI that schedules PDSCH can also be called DL allocation, DL DCI, etc., and the DCI that schedules PUSCH can also be called UL authorization, UL DCI, etc. Furthermore, PDSCH can also be replaced with DL data, and PUSCH can also be replaced with UL data.

[0191] In PDCCH detection, a Control Resource Set (CORESET) and a search space can be utilized. A CORESET corresponds to the resources used to search for DCIs. The search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor CORESETs associated with a specific search space based on search space settings.

[0192] A search space can also correspond to one or more PDCCH candidates equivalent to one or more aggregation levels. One or more search spaces can also be referred to as a search space set. In addition, the terms "search space", "search space set", "search space setting", "search space set setting", "CORESET", and "CORESET setting" used in this disclosure can be used interchangeably.

[0193] Uplink control information (UCI) including at least one of Channel State Information (CSI), delivery confirmation information (such as Hybrid Automatic Repeat reQuest ACK knowledgement (HARQ-ACK), ACK / NACK, etc.), and Scheduling Request (SR) can also be transmitted via PUCCH. Random access preambles used for establishing a connection with the cell can also be transmitted via PRACH.

[0194] Furthermore, in this disclosure, downlink, uplink, etc., may be described without the word "link". Additionally, various channels may be described without the word "physical".

[0195] In wireless communication system 1, synchronization signals (SS) and downlink reference signals (DL-RS) can also be transmitted. As DL-RS, wireless communication system 1 can also transmit cell-specific reference signals (CRS), channel state information reference signals (CSI-RS), demodulation reference signals (DMRS), positioning reference signals (PRS), phase tracking reference signals (PTRS), etc.

[0196] Synchronization signals can be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SS (PSS, SSS) and PBCH (and DMRS for PBCH) can also be called an SS / PBCH block, SS block (SSB), etc. Furthermore, SS, SSB, etc., can also be called reference signals.

[0197] Furthermore, in the wireless communication system 1, the uplink reference signal (UL-RS) can also transmit measurement reference signals (sounding reference signals (SRS)) and demodulation reference signals (DMRS). Additionally, the DMRS can also be referred to as a user terminal-specific reference signal (UE-specific reference signal).

[0198] (Base station)

[0199] Figure 8 This diagram illustrates an example of the structure of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmit / receive unit 120, a transmit / receive antenna 130, and a transmission path interface (transmission line interface) 140. Alternatively, the control unit 110, the transmit / receive unit 120, the transmit / receive antenna 130, and the transmission path interface 140 may each be provided in more than one manner.

[0200] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it can also be envisioned that the base station 10 also possesses other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0201] The control unit 110 performs overall control of the base station 10. The control unit 110 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the art to which this disclosure pertains.

[0202] The control unit 110 can also control signal generation and scheduling (e.g., resource allocation, mapping). The control unit 110 can also control transmission, reception, and measurement using the transmit / receive unit 120, transmit / receive antenna 130, and transmission path interface 140. The control unit 110 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmit / receive unit 120. The control unit 110 can also perform call processing (setting, releasing, etc.) of the communication channel, status management of the base station 10, and management of wireless resources.

[0203] The transmitting / receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting / receiving unit 120 can be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0204] The transmitting and receiving unit 120 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 1211 and an RF unit 122. The receiving unit can also be composed of a receiving processing unit 1212, an RF unit 122, and a measurement unit 123.

[0205] The transmitting and receiving antenna 130 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0206] The transmitting / receiving unit 120 can also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 can also receive the aforementioned uplink channel, uplink reference signal, etc.

[0207] The transmitting and receiving unit 120 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0208] The transmitting and receiving unit 120 (transmitting processing unit 1211) may, for example, perform processing at the Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer (e.g., RLC retransmission control), and Medium Access Control (MAC) layer (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 110, and generate a bit string to be transmitted.

[0209] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform transmission processing such as channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), Discrete Fourier Transform (DFT) processing (as needed), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output the baseband signal.

[0210] The transmitting and receiving unit 120 (RF unit 122) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 130.

[0211] On the other hand, the transmitting and receiving unit 120 (RF unit 122) can also amplify, filter, and demodulate the signals of the wireless frequency band received through the transmitting and receiving antenna 130 into the baseband signal.

[0212] The transmitting and receiving unit 120 (receiving and processing unit 1212) can also perform receiving and processing on the acquired baseband signal, including analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to acquire user data, etc.

[0213] The transmitting / receiving unit 120 (measurement unit 123) can also perform measurements related to the received signal. For example, the measurement unit 123 can also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc., based on the received signal. The measurement unit 123 can also 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 can also be output to the control unit 110.

[0214] The transmission path interface 140 can also transmit and receive signals (backhaul signaling) between the device included in the core network 30 and other base stations 10, and can also acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0215] In addition, the transmitting unit and receiving unit of the base station 10 in this disclosure may also be composed of at least one of a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface 140.

[0216] Additionally, the transmitting / receiving unit 120 can also transmit settings for specific indices, created based on the physical cell ID and different from the physical cell ID, representing serving cells and non-serving cells. The transmitting / receiving unit 120 can also receive channel state information reports corresponding to the set specific indices.

[0217] The control unit 110 can also control the reception of channel status information reports corresponding to the set specific index.

[0218] (User terminal)

[0219] Figure 9This diagram illustrates an example of the structure of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Alternatively, more than one of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be included.

[0220] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the user terminal 20 may also have other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0221] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the technical field to which this disclosure pertains.

[0222] The control unit 210 can also control signal generation, mapping, etc. The control unit 210 can also control transmission, reception, measurement, etc., using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmission / reception unit 220.

[0223] The transmitting / receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting / receiving unit 220 may be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0224] The transmitting and receiving unit 220 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit can also be composed of a receiving processing unit 2212, an RF unit 222, and a measurement unit 223.

[0225] The transmitting and receiving antenna 230 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0226] The transmitting / receiving unit 220 can also receive the downlink channel, synchronization signal, downlink reference signal, etc., mentioned above. The transmitting / receiving unit 220 can also transmit the uplink channel, uplink reference signal, etc., mentioned above.

[0227] The transmitting and receiving unit 220 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0228] The transmitting and receiving unit 220 (transmitting processing unit 2211) may, for example, perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 210, and generate the bit string to be transmitted.

[0229] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output the baseband signal.

[0230] Furthermore, the application of DFT processing can be based on the transform precoding settings. For a specific channel (e.g., PUSCH), if transform precoding is enabled, the transmit / receive unit 220 (transmit processing unit 2211) can perform DFT processing as described above for transmitting the channel using the DFT-s-OFDM waveform. Otherwise, the transmit / receive unit 220 (transmit processing unit 2211) can perform DFT processing as described above without performing DFT processing.

[0231] The transmitting and receiving unit 220 (RF unit 222) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 230.

[0232] On the other hand, the transmitting and receiving unit 220 (RF unit 222) can also amplify, filter, and demodulate the baseband signal for the wireless frequency band signal received by the transmitting and receiving antenna 230.

[0233] The transmitting and receiving unit 220 (receiving and processing unit 2212) can also perform receiving and processing on the acquired baseband signal, such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to acquire user data.

[0234] The transmitting / receiving unit 220 (measurement unit 223) can also perform measurements related to the received signal. For example, the measurement unit 223 can also perform RRM measurements, CSI measurements, etc., based on the received signal. The measurement unit 223 can also 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 can also be output to the control unit 210.

[0235] Alternatively, the transmitting and receiving units of the user terminal 20 in this disclosure may also be composed of at least one transmitting / receiving unit 220 and transmitting / receiving antenna 230.

[0236] In addition, the transmitting and receiving unit 220 can also receive a specific index setting that is different from the physical cell ID, based on the physical cell ID, and represents the serving cell and non-serving cells.

[0237] In the case of inter-cell mobility applied to a single transmit / receive point or multiple transmit / receive points, transmit / receive unit 220 can also receive the transmit setting indication (TCI) state corresponding to the specific index.

[0238] The transmitting and receiving unit 220 can also receive the relationship between the serving cell index, the non-serving cell index, or the physical cell ID and the specific index via higher-layer signaling.

[0239] The transmitting / receiving unit 220 can also receive candidates of the serving cell index, the non-serving cell index, or the physical cell ID via higher-layer signaling, and receive a Media Access Control (MAC) element (CE) for activating at least one of the candidates. The activated candidate may also correspond to the specific index.

[0240] The control unit 210 can also control the transmission of channel status information reports corresponding to the set specific index.

[0241] (Hardware Structure)

[0242] Furthermore, the block diagrams used in the description of the above embodiments illustrate functional units. These functional blocks (structural units) are implemented through any combination of at least one of hardware and software. Moreover, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented using a single device that is physically or logically combined, or it can be implemented by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices. A functional block can also be implemented by combining the aforementioned single device or multiple devices with software.

[0243] Here, the functions include judgment, decision, determination, calculation, calculation, processing, export, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, choosing, establishing, comparison, assumption, expectation, regard as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, a functional block (structural unit) that implements the sending function can also be called a transmitting unit, transmitter, etc. As described above, the implementation method is not particularly limited.

[0244] For example, the base station, user terminal, etc. in one embodiment of this disclosure can also function as a computer for processing the wireless communication method of this disclosure. Figure 10 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment. The base station 10 and the user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0245] Furthermore, in this disclosure, terms such as apparatus, circuit, device, section, and unit are interchangeable. The hardware structure of base station 10 and user terminal 20 can be configured to include one or more of the apparatuses shown in the figures, or it can be configured not to include any of the apparatuses.

[0246] For example, only one processor 1001 is shown, but there can be multiple processors. Furthermore, processing can be performed by one processor, or simultaneously, sequentially, or by two or more processors using other methods. Additionally, processor 1001 can be implemented using more than one chip.

[0247] The functions of the base station 10 and the user terminal 20 are implemented, for example, by reading specific software (programs) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 can perform calculations and control communication via the communication device 1004, or control at least one of reading out and writing data in the memory 1002 and the storage device 1003.

[0248] The processor 1001, for example, enables the operating system to operate and control the computer as a whole. The processor 1001 may also be composed of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic devices, registers, etc. For example, at least a portion of the control unit 110 (210), the transmit / receive unit 120 (220), etc., described above may also be implemented by the processor 1001.

[0249] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and performs various processes accordingly. As a program, a program that causes the computer to perform at least a portion of the operations described in the above embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001; similar implementations can be made for other functional blocks.

[0250] The memory 1002 may also be a computer-readable recording medium, such as being composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage media. The memory 1002 may also be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 is capable of storing executable programs (program code), software modules, etc., for implementing the wireless communication method according to an embodiment of this disclosure.

[0251] Storage device 1003 may also be a computer-readable recording medium, such as comprising at least one of the following: flexible disc, floppy disk, optical disk (e.g., compact disc ROM, CD-ROM, etc.), digital multifunction disk, Blu-ray disc, removable disk, hard disk, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium. Storage device 1003 may also be referred to as an auxiliary storage device.

[0252] The communication device 1004 is hardware (transmitting and receiving device) used for communication between computers via at least one of a wired network and a wireless network. It is also referred to as a network device, network controller, network interface card (NIC), communication module, etc. To implement at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD), the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the aforementioned transmit / receive unit 120 (220) and transmit / receive antenna 130 (230) may also be implemented by the communication device 1004. The transmit / receive unit 120 (220) may also be implemented by physically or logically separating the transmit unit 120a (220a) and the receive unit 120b (220b).

[0253] Input device 1005 is an input device that receives input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, light-emitting diode (LED) lamp, etc.). Alternatively, input device 1005 and output device 1006 can also be an integrated structure (e.g., touch panel).

[0254] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 can be configured as a single bus or as different buses between the devices.

[0255] Furthermore, the base station 10 and the user terminal 20 can also 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), or a field-programmable gate array (FPGA), and can be used to implement some or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0256] (Modified Example)

[0257] Furthermore, the terms described in this disclosure, as well as those necessary for understanding this disclosure, may be replaced with terms that have the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be used interchangeably. Additionally, a signal may also be a message. A reference signal may also be abbreviated as RS, and may be referred to as pilot, pilot signal, etc., depending on the applied standard. Furthermore, a component carrier (CC) may also be referred to as cell, frequency carrier, carrier frequency, etc.

[0258] A radio frame can also be composed of one or more periods (frames) in the time domain. Each of these periods (frames) that constitutes a radio frame can also be called a subframe. Furthermore, a subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) independent of the parameter set (numerology).

[0259] Here, the parameter set can also be communication parameters applied in at least one of the transmission and reception of a signal or channel. For example, the parameter set can also represent at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0260] In the time domain, a time slot can also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.). Furthermore, a time slot can also be a time unit based on a set of parameters.

[0261] A time slot can also contain multiple mini-time slots. Each mini-time slot can also consist of one or more symbols in the time domain. Furthermore, a mini-time slot can also be called a sub-time slot. A mini-time slot can also consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-time slot can also be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using mini-time slots can also be called PDSCH (PUSCH) mapping type B.

[0262] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols can also use their respective other names. Furthermore, the time units such as frames, subframes, time slots, mini-time slots, and symbols used in this disclosure can be used interchangeably.

[0263] For example, a subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, a time slot or a mini-time slot can also be called a TTI. That is, at least one of a subframe and a TTI can be a subframe in existing LTE (1ms), a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing TTI may not be called a subframe, but a time slot, mini-time slot, etc.

[0264] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules radio resources (frequency bandwidth, transmit power, etc., available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0265] TTI can also be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., and can also be a unit of processing such as scheduling and link adaptation. In addition, when a TTI is given, the actual time interval (e.g., the number of symbols) mapped to transmission blocks, code blocks, codewords, etc. can be shorter than the TTI.

[0266] Additionally, where a time slot or a mini-time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini-time slot) can also serve as the minimum time unit for scheduling. Furthermore, the number of time slots (mini-time slots) constituting the minimum time unit of the schedule can also be controlled.

[0267] A TTI with a duration of 1 ms can also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), standard TTI, long TTI, normal subframe, standard subframe, long subframe, time slot, etc. A TTI shorter than a normal TTI can also be referred to as a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, mini time slot, sub-time slot, time slot, etc.

[0268] In addition, long TTIs (e.g., normal TTIs, subframes, etc.) can be replaced with TTIs with a duration of more than 1 ms, and short TTIs (e.g., shortened TTIs, etc.) can be replaced with TTIs with a duration of less than long TTIs but more than 1 ms.

[0269] A resource block (RB) is a unit of resource allocation in both the time and frequency domains. In the frequency domain, it can also contain one or more consecutive subcarriers. The number of subcarriers in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers in an RB can also be determined based on the parameter set.

[0270] Furthermore, an RB can contain one or more symbols in the time domain, and can also be a time slot, a mini-time slot, a subframe, or the length of a TTI. A TTI, a subframe, etc., can also be composed of one or more resource blocks.

[0271] In addition, one or more RBs can also be referred to as Physical Resource Blocks (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0272] Furthermore, a resource block can also consist of one or more resource elements (REs). For example, an RE can also be a radio resource area consisting of a subcarrier and a symbol.

[0273] The Bandwidth Part (BWP) (also known as partial bandwidth, etc.) can also represent a subset of consecutive common resource blocks (RBs) used for a certain parameter set in a certain carrier. Here, common RBs can also be determined by the index of RBs based on the common reference point of the carrier. PRBs can also be defined in a BWP and appended with numbers within that BWP.

[0274] A BWP can also include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs can also be set within a single carrier.

[0275] At least one of the configured BWPs can be active, and the UE may not intend to transmit or receive specific signals / channels outside of the active BWPs. Furthermore, terms such as "cell" and "carrier" in this disclosure can be replaced with "BWP".

[0276] Furthermore, the structures described above, such as radio frames, subframes, time slots, mini-time slots, and symbols, are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, and the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in many ways.

[0277] Furthermore, the information, parameters, etc., described in this disclosure can be represented by absolute values, relative values ​​with respect to a specific value, or other corresponding information. For example, wireless resources can also be indicated by a specific index.

[0278] In this disclosure, the names used for parameters, etc., are not limiting names in any respect. Furthermore, the mathematical expressions, etc., using these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name; therefore, the various names assigned to these various channels and information elements are not limiting names in any respect.

[0279] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be mentioned throughout the above description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0280] Furthermore, information, signals, etc., can be output in at least one of the following directions: from higher level (upper layer) to lower level (lower layer), and from lower layer to higher level. Information, signals, etc., can also be input and output via multiple network nodes.

[0281] Input and output information, signals, etc., can be stored in a specific location (e.g., memory) or managed using a management table. Input and output information, signals, etc., can be overwritten, updated, or appended. Output information, signals, etc., can also be deleted. Input information, signals, etc., can also be sent to other devices.

[0282] The notification of information is not limited to the methods / implementations described in this disclosure, and may also be carried out by other methods. For example, the notification of information in this disclosure may also be implemented by physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI), etc.), higher layer signaling (e.g., radio resource control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB) etc.), medium access control (MAC) signaling), other signals, or combinations thereof.

[0283] In addition, physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. Furthermore, RRC signaling can also be referred to as RRC messages, such as RRC connection setup messages, RRC connection reconfiguration messages, etc. Additionally, MAC signaling can also be notified using, for example, the MAC control element (CE).

[0284] Furthermore, notification of specific information (e.g., a notification that “is X”) is not limited to explicit notification, but can also be implicit (e.g., by not providing that specific information, or by providing other information).

[0285] The determination can be made by a value represented by a single bit (0 or 1), by a true or false value (boolean), or by a numerical comparison (e.g., a comparison with a specific value).

[0286] Whether software is called software, firmware, middleware, microcode, hardware description language, or any other name, it should be broadly interpreted to refer to instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0287] Furthermore, software, instructions, and information can also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL) etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0288] The terms “system” and “network” as used in this disclosure are used interchangeably. “Network” may also mean devices included in a network (e.g., base stations).

[0289] In this disclosure, the terms "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", "beamwidth", "beam angle", "antenna", "antenna element", and "panel" are used interchangeably.

[0290] In this disclosure, the terms "Base Station (BS)", "Wireless 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", and "Component Carrier" are used interchangeably. There are also instances where the terms macro cell, small cell, femtocell, and picocell are used to refer to a base station.

[0291] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​at least one of the base station and base station subsystem providing communication services within that coverage area.

[0292] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "user equipment (UE)", and "terminal" are used interchangeably.

[0293] There are also instances where mobile stations are referred to as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or several other appropriate terms.

[0294] At least one of the base station and the mobile station can also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Additionally, at least one of the base station and the mobile station can also be a device mounted on a mobile body, the mobile body itself, etc. This mobile body can be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body moving in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanized or unmanned). Furthermore, at least one of the base station and the mobile station also includes devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station can also be an Internet of Things (IoT) device such as a sensor.

[0295] Furthermore, the base station in this disclosure can also be replaced by a user terminal. For example, various methods / implementations of this disclosure can be applied to a structure where the communication between the base station and the user terminal is replaced by communication between multiple user terminals (e.g., also referred to as device-to-device (D2D) or vehicle-to-everything (V2X)). In this case, it can also be configured such that the user terminal 20 has the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be replaced with terms corresponding to inter-terminal communication (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can also be replaced with sidelink channel.

[0296] Similarly, the user terminal in this disclosure can also be replaced by a base station. In this case, it can also be configured such that the base station 10 has the functions of the user terminal 20 described above.

[0297] In this disclosure, actions purported to be performed by the base station are sometimes also performed by its upper node, depending on the circumstances. Clearly, in a network containing one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (e.g., considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited to these), or combinations thereof.

[0298] The various methods / implementations described in this disclosure can be used individually or in combination, and can be switched as needed during execution. Furthermore, the processing procedures, sequences, flowcharts, etc., of the various methods / implementations described in this disclosure can be rearranged as long as they do not contradict each other. For example, with respect to the methods described in this disclosure, the illustrated order is used to indicate various steps, but the order in which they are indicated is not limited.

[0299] The various methods / implementations described in this disclosure can also be applied to 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 This includes 802.11 (Wi-Fi, registered trademark), IEEE 802.16 (WiMAX, registered trademark), IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (registered trademark), systems utilizing other suitable wireless communication methods, and next-generation systems derived from them. Furthermore, multiple systems can be combined (e.g., LTE or LTE-A, combinations with 5G, etc.) for application.

[0300] As used in this disclosure, the term "based on" does not mean "based on only" unless otherwise specified. In other words, the term "based on" means both "based on only" and "based on at least".

[0301] The term "determining" as used in this disclosure can encompass a wide variety of actions. For example, "determining" can also refer to judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), and ascertaining.

[0302] In addition, "judgment (decision)" can also refer to receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, accessing (e.g., accessing data in memory), etc., as situations where "judgment (decision)" is performed.

[0303] Furthermore, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, or comparing are considered as making a "judgment (decision)". In other words, "judgment (decision)" can also refer to certain actions as situations where a "judgment (decision)" is made.

[0304] In addition, "judgment (decision)" can also be replaced by "assuming", "expecting", "considering", etc.

[0305] As used in this disclosure, the terms "connected," "coupled," or any variations thereof, refer to all direct or indirect connections or combinations between two or more elements, and can include cases where there is one or more intermediate elements between two mutually "connected" or "coupled" elements. The connections or combinations between elements can be physical, logical, or a combination thereof. For example, "connected" can also be replaced with "access."

[0306] In this disclosure, when two elements are connected, it is possible to use more than one wire, cable, printed electrical connection, etc., and to use electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region as several non-limiting and non-inclusive examples, so that they are "connected" or "combined" with each other.

[0307] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other." Additionally, the term can also mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[0308] When the terms "include," "including," and variations thereof are used in this disclosure, these terms, like the term "comprising," mean inclusive. Furthermore, the term "or" as used in this disclosure does not mean XOR.

[0309] In this disclosure, for example, in cases where articles are added through translation, such as a, an, and the in English, the disclosure may also include cases where the noun following these articles is in a plural form.

[0310] The invention disclosed herein has been described in detail above. However, it will be apparent to those skilled in the art that the invention is not limited to the embodiments described herein. The invention can be implemented with modifications and variations without departing from the spirit and scope of the invention as defined by the claims. Therefore, the description in this disclosure is for illustrative purposes only and is not intended to limit the invention in any way.

Claims

1. A terminal, comprising: The receiving unit receives a specific index that is different from the physical cell ID; that is, the specific index represents the serving cell when set to a specific value and represents a non-serving cell when set to a value other than the specific value. It also receives the relationship between the physical cell ID and the specific index via higher-layer signaling, wherein the maximum number of specific indexes is less than the maximum number of physical cell IDs. The control unit controls the transmission of the Channel State Information (CSI) report corresponding to the specific index.

2. The terminal as described in claim 1, wherein, In the case of inter-cell mobility with multiple transmit and receive points, the receiving unit receives the transmit setting indication state (TCI state) of the downlink (DL) or uplink (UL) corresponding to the specific index.

3. The terminal as described in claim 1, wherein, The receiving unit receives the indices of multiple non-serving cells via Radio Resource Control (RRC) signaling, and receives a Media Access Control (MAC) control element (CE) for activating at least one of the multiple non-serving cells. The activated non-serving cell corresponds to the specific index.

4. The terminal as described in claim 1, wherein, The control unit measures the Channel Measurement Resources (CMR) corresponding to the non-serving cell and controls the transmission of the CSI report, which includes the Layer 1 Reference Signal Received Power (L1-RSRP).

5. The terminal as described in claim 1, wherein, The terminal further includes a transmitting unit that transmits the number of non-serving cells for each component carrier, i.e., each CC, supported by the terminal as capability information.

6. A wireless communication method for a terminal, comprising: The steps include receiving a specific index that is different from the physical cell ID (i.e., the specific index representing the serving cell when set to a specific value and the non-serving cell when set to a value other than the specific value), receiving the relationship between the physical cell ID and the specific index via higher-layer signaling, wherein the maximum number of the specific indexes is less than the maximum number of the physical cell IDs; and receiving the relationship between the physical cell ID and the specific indexes via higher-layer signaling. The steps for controlling the transmission of the Channel State Information (CSI) report corresponding to the specific index.

7. A base station, comprising: The transmitting unit transmits a specific index different from the physical cell ID; that is, the specific index represents the serving cell when set to a specific value and represents a non-serving cell when set to a value other than the specific value. It also transmits the relationship between the physical cell ID and the specific index via higher-layer signaling, wherein the maximum number of the specific indexes is less than the maximum number of physical cell IDs. The control unit controls the reception of the Channel State Information (CSI) report corresponding to the specific index.

8. A system comprising a terminal and a base station, The terminal has: The receiving unit receives a specific index that is different from the physical cell ID; that is, the specific index represents the serving cell when set to a specific value and represents a non-serving cell when set to a value other than the specific value. It also receives the relationship between the physical cell ID and the specific index via higher-layer signaling, wherein the maximum number of specific indexes is less than the maximum number of physical cell IDs. The control unit controls the transmission of the Channel State Information (CSI) report corresponding to the specific index. The base station has: The control unit controls the reception of the CSI report.

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