Terminal

Abstract

This terminal transmits and receives a wireless signal conforming to a sub-band full-duplex communication scheme in which an uplink sub-band and a downlink sub-band are allocated in a non-overlapping manner in the frequency direction within a prescribed time based on time division duplexing. The terminal determines on the basis of the feature of a reference signal used to measure the downlink wireless quality whether or not it is assumed that the resource of the reference signal is not associated with a resource block other than the available resource block that is usable as the downlink sub-band.

Description

Terminal

[0001] The present disclosure relates to a terminal that supports SBFD.

[0002] The 3rd Generation Partnership Project (3GPP: registered trademark) is developing specifications for the 5th generation mobile communication system (5G, also known as New Radio (NR) or Next Generation (NG)), and is also developing specifications for the next generation, known as Beyond 5G, 5G Evolution, or 6G.

[0003] For example, 3GPP Release 19 is studying an extension of the duplex method (Non-Patent Document 1). Specifically, regarding Sub-Band non-overlapping Full Duplex (SBFD), which is a duplex method that enables simultaneous use of a downlink (DL) and an uplink (UL) within a carrier of a time division duplex (TDD) band, it has been agreed to study a method of indicating to a terminal (User Equipment, UE) the positions (time positions) of the UL sub-band and the DL sub-band (which may also be called SBFD sub-band) in the time direction (e.g., symbols).

[0004] Furthermore, with regard to reports (CSI reports) using Channel State Information-Reference Signals (CSI-RS), which are a type of reference signal (RS) transmitted by a radio base station (gNB) for a UE to estimate the quality of the DL radio channel, options are being considered that specify two types of settings, namely, a setting associated with SBFD symbols and a setting associated with non-SBFD symbols, or an option that specifies only one type of setting (Non-Patent Document 2).

[0005] "New WID: Evolution of NR duplex operation: Sub-band full duplex (SBFD)", RP-234035, 3GPP TSG RAN Meeting #102, 3GPP, December 20233GPP TR 38.858 V18.1.0, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Study on Evolution of NR Duplex Operation (Release 18), 3GPP, March 2024

[0006] As mentioned above, several options are being considered for the CSI report settings when using the SBFD subband, but some of them may not be appropriate from the perspective of reducing energy consumption across the network (NES: Network Energy Saving).

[0007] Therefore, the following disclosure has been made in consideration of such circumstances, and aims to provide a terminal that can transmit a more appropriate and efficient CSI report when using SBFD subbands.

[0008] One aspect of the present disclosure is a terminal that includes a communication unit that transmits and receives radio signals according to a subband full-duplex communication method in which uplink subbands and downlink subbands are allocated non-overlappingly in the frequency direction within a specified time period based on time division duplexing, and a control unit that determines, based on characteristics of a reference signal used to measure downlink radio quality, whether to assume that resources of the reference signal are not associated with resource blocks other than available resource blocks that can be used as the downlink subband.

[0009] One aspect of the present disclosure is a terminal (UE200) that includes a communication unit (radio signal transceiver unit 210) that transmits and receives radio signals according to a subband full-duplex communication method in which uplink subbands or downlink subbands are allocated non-overlappingly in the frequency direction within a specified time period based on time division duplex, and a control unit (control unit 270) that assumes that opportunities to receive reference signals used to measure downlink radio quality are limited to time positions according to the subband full-duplex communication method or time positions according to a communication method other than the subband full-duplex communication method.

[0010] One aspect of the present disclosure is a terminal including: a communication unit that transmits and receives radio signals according to a subband full-duplex communication method in which uplink subbands or downlink subbands are allocated non-overlappingly in the frequency direction within a specified time period based on time division duplex; and a control unit that assumes that settings related to reporting of downlink radio quality when the subband full-duplex communication method is applied are instructed by at least one of parameters of a radio resource control layer, control elements of a medium access control layer, or downlink control information.

[0011] One aspect of the present disclosure is a terminal including: a communication unit that transmits and receives radio signals according to a subband full-duplex communication method in which uplink subbands or downlink subbands are allocated non-overlappingly in the frequency direction within a specified time period based on time division duplex; and a control unit that assumes that resources of reference signals used for measuring downlink radio quality when the subband full-duplex communication method is applied and resources of reference signals used for measuring downlink radio quality when a communication method other than the subband full-duplex communication method is applied are set.

[0012] One aspect of the present disclosure is a terminal including: a communication unit that transmits and receives radio signals according to a subband full-duplex communication method in which uplink subbands or downlink subbands are allocated non-overlapping in the frequency direction within a specified time period based on time division duplex; and a control unit that assumes that the uplink subbands used for reporting downlink radio quality overlap with at least a portion of available resource blocks that can be used as the downlink subbands, or are allocated to resource blocks other than the available resource blocks.

[0013] One aspect of the present disclosure is a terminal including: a communication unit that transmits and receives radio signals according to a subband full-duplex communication method in which uplink subbands or downlink subbands are allocated non-overlappingly in the frequency direction within a specified time period based on time division duplex; and a control unit that assumes that, when the subband full-duplex communication method is applied, no granularity is applied to the setting of the downlink subbands targeted at resources of a reference signal used to measure downlink radio quality.

[0014] FIG. 1 is a diagram illustrating an overall schematic configuration of a wireless communication system 10. FIG. 2 is a diagram illustrating an example configuration of a radio frame, a subframe, and a slot used in the wireless communication system 10. FIG. 3 is a diagram illustrating an example configuration of TDD and XDD / SBFD. FIG. 4 is a functional block diagram of a gNB 100 and a UE 200. FIG. 5 is a diagram illustrating an example configuration of a UL subband and a DL subband according to SBFD. FIG. 6 is a diagram illustrating an example of preconditions for operation according to an embodiment. FIG. 7 is a diagram illustrating an example relationship between a CSI-RS and a CSI report according to precondition 1 of FIG. 6. FIG. 8 is a diagram illustrating an example relationship between a CSI-RS and a CSI report according to precondition 2 of FIG. 6. FIG. 9 is a diagram illustrating an example relationship between a CSI-RS and a CSI report according to precondition 3 of FIG. 6. FIG. 10 is a diagram illustrating an example relationship between a CSI-RS and a CSI report according to precondition 4 of FIG. 6. FIG. 11 is a diagram illustrating an example relationship between a CSI-RS and a CSI report according to precondition 5 of FIG. 6. FIG. 12 is a diagram illustrating an example communication sequence related to a CSI report. FIG. 13 is a diagram showing an example of CSI-RS frequency resource restriction (in the case of premise 1) according to operation example 1. FIG. 14 is a diagram showing an example of CSI-RS frequency resource restriction (in the case of premise 2) according to operation example 1. FIG. 15 is a diagram showing an example of CSI-RS frequency resource restriction (in the case of premise 3) according to operation example 1. FIG. 16 is a diagram showing an example of CSI-RS frequency resource restriction (in the case of premise 4) according to operation example 1. FIG. 17 is a diagram showing an example of CSI-RS frequency resource restriction (in the case of premise 5) according to operation example 1. FIG. 18 is a diagram showing an example configuration of CSI-ReportConfig according to option 2 of operation example 4. FIG. 19 is a diagram showing an example of the hardware configuration of the gNB 100 and the UE 200. FIG. 20 is a diagram showing an example configuration of a vehicle 2001.

[0015] Hereinafter, embodiments will be described with reference to the drawings. Note that the same or similar reference numerals are used to designate the same functions or configurations, and descriptions thereof will be omitted as appropriate.

[0016] (1) Overall Schematic Configuration of Wireless Communication System Fig. 1 is a diagram showing the overall schematic configuration of a wireless communication system 10 according to this embodiment. The wireless communication system 10 is a wireless communication system conforming to 5G New Radio (NR) and includes a Next Generation-Radio Access Network 20 (hereinafter, NG-RAN 20) and a terminal 200 (hereinafter, UE 200, User Equipment, UE). Note that the wireless communication system 10 may also be a wireless communication system conforming to a scheme called Beyond 5G, 5G Evolution, or 6G.

[0017] The NG-RAN 20 includes a radio base station 100 (hereinafter, gNB 100). Note that the specific configuration of the radio communication system 10, including the number of gNBs and UEs, is not limited to the example shown in FIG. 1 .

[0018] The NG-RAN 20 actually includes a plurality of NG-RAN nodes, specifically, gNBs (or ng-eNBs), and is connected to a 5G core network (5GC, not shown). The NG-RAN 20 and the 5GC may also be simply referred to as a "network."

[0019] The gNB 100 is a 5G-compliant radio base station that performs 5G-compliant radio communication with the UE 200. The gNB 100 and the UE 200 are capable of supporting Massive MIMO (Multiple-Input Multiple-Output), which generates a more directional antenna beam (hereinafter referred to as beam BM) by controlling radio signals transmitted from multiple antenna elements, Carrier Aggregation (CA), which aggregates multiple component carriers (CCs), and Dual Connectivity (DC), which simultaneously communicates between the UE and two NG-RAN nodes.

[0020] The type of DC may be Multi-RAT Dual Connectivity (MR-DC), which uses multiple radio access technologies, or NR-NR Dual Connectivity (NR-DC), which uses only NR. MR-DC may also be E-UTRA-NR Dual Connectivity (EN-DC), in which the eNB constitutes the master node (MN) and the gNB constitutes the secondary node (SN), or NR-E-UTRA Dual Connectivity (NE-DC), which is the reverse.

[0021] The gNB 100 can transmit multiple beams BM with different transmission directions (which may also be simply referred to as directions, or radiation directions, or coverages) in a space- and time-division manner. Note that the gNB 100 may transmit multiple beams BM simultaneously.

[0022] The wireless communication system 10 may also support multiple frequency ranges (FR). Specifically, the wireless communication system 10 may support the following frequency ranges:

[0023] ・FR1: 410 MHz to 7.125 GHz ・FR2-1: 24.25 GHz to 52.6 GHz FR1 may use a sub-carrier spacing (SCS) of 15, 30, or 60 kHz and a bandwidth (BW) of 5 to 100 MHz. FR2-1 is a higher frequency than FR1 and may use a sub-carrier spacing (SCS) of 60 or 120 kHz (including 240 kHz) and a bandwidth (BW) of 50 to 400 MHz.

[0024] Note that SCS may be interpreted as numerology, which is defined in 3GPP TS38.300 and corresponds to one subcarrier spacing in the frequency domain.

[0025] Furthermore, the wireless communication system 10 also supports a frequency band higher than the FR2-1 frequency band. Specifically, the wireless communication system 10 supports a frequency band exceeding 52.6 GHz up to 71 GHz. Such a high frequency band may be referred to as FR2-2.

[0026] When using bands above 52.6 GHz, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform - Spread (DFT-S-OFDM) with larger Sub-Carrier Spacing (SCS) may be applied.

[0027] Additionally, as mentioned above, in high frequency bands such as FR2-2, increased inter-carrier phase noise becomes an issue, which may necessitate the application of a larger (wider) SCS or a single-carrier waveform.

[0028] The larger the SCS, the shorter the symbol / cyclic prefix (CP) period and slot period (assuming a 14 symbol / slot configuration is maintained). Figure 2 shows an example of the configuration of radio frames, subframes, and slots used in the wireless communication system 10.

[0029] If the 14-symbol / slot configuration is maintained, the larger (wider) the SCS, the shorter the symbol period (and slot period). The time direction may be referred to as the time domain, symbol period, symbol length, or symbol time. The frequency direction may be referred to as the frequency domain, resource block, subcarrier, or BWP (Bandwidth part).

[0030] The frequency resources may include component carriers, subcarriers, resource blocks (RBs), resource block groups (RBGs), bandwidth parts (BWPs), etc. The time resources may include symbols, slots, minislots, subframes, radio frames, discontinuous reception (DRX) periods, etc.

[0031] The number of symbols constituting one slot does not necessarily have to be 14 (for example, 28 or 56 symbols). Also, the number of slots per subframe may differ depending on the SCS.

[0032] The wireless communication system 10 may use an SSB (SS / PBCH Block) that is configured from a synchronization signal (SS) and a downlink physical broadcast channel (PBCH).

[0033] SSBs are transmitted periodically from the network mainly to allow UE 200 to detect cell IDs and reception timings when starting communication. In NR, SSBs are also used to measure the reception quality of each cell. The SSB transmission periodicity may be specified as 5, 10, 20, 40, 80, 160 milliseconds, etc. Note that the initial access UE 200 may assume a transmission period of 20 milliseconds.

[0034] Furthermore, multiple duplexing methods may be used in the wireless communication system 10. Specifically, time division duplexing (TDD) and frequency division duplexing (FDD) may be used. The duplexing method may be interpreted as a method for realizing simultaneous transmission and reception (duplex communication) of downlink (DL) and uplink (UL).

[0035] Furthermore, the wireless communication system 10 may use another duplexing method that enables simultaneous use of DL and UL, specifically, XDD (Cross Division Duplex) / SBFD (Sub-Band non-overlapping Full Duplex).

[0036] Figure 3 shows an example of the configuration of TDD and XDD / SBFD. As shown in Figure 3, in TDD defined in 3GPP Releases 15 to 17, DL, UL, or F (flexible: can be set to DL or UL) can be set for each symbol and instructed to UE 200.

[0037] On the other hand, in XDD / SBFD, gNB100 can configure specific frequency resources (e.g., subbands) as DL and other frequency resources as UL at a specified time T, such as a symbol, and instruct UE200 accordingly.

[0038] XDD / SBFD allows simultaneous use of DL and UL within a carrier (CC) in the TDD band. Using the central portion of the frequency resources within the DL and UL carriers can avoid or mitigate potential cross-link interference (CLI) with adjacent carriers. XDD / SBFD may also be referred to as a type of full duplex, or FDD full duplex, or as sub-band (DL / UL) full duplex, as abbreviated as SBFD.

[0039] In SBFD, frequency resources for DL ​​(DL band) and frequency resources for UL (UL band) are allocated in a non-overlapping manner to the same duplex band on the same time period.

[0040] Specifically, XDD / SBFD is a scheme in which DL bands and UL bands are allocated non-overlappingly in the frequency direction within a specified time T based on time division duplex. The DL band may be interpreted as a DL subband, and the UL band may be interpreted as a UL subband. In the following, XDD / SBFD will be abbreviated simply as SBFD where appropriate.

[0041] (2) Functional Block Configuration of Wireless Communication System Next, a functional block configuration of the wireless communication system 10 will be described. Specifically, a functional block configuration of the UE 200 will be described. Fig. 4 is a functional block configuration diagram of the gNB 100 and the UE 200.

[0042] As shown in FIG. 4 , the UE 200 includes a radio signal transmitting / receiving unit 210, an amplifier unit 220, a modulation / demodulation unit 230, a control signal / reference signal processing unit 240, an encoding / decoding unit 250, a data transmitting / receiving unit 260, and a control unit 270.

[0043] It should be noted that Fig. 4 shows only the main functional blocks relevant to the description of the embodiment, and that the UE 200 (gNB 100) has other functional blocks (e.g., a power supply unit, etc.). Fig. 4 shows the functional block configuration of the UE 200, and for the hardware configuration, please refer to Fig. 8.

[0044] The radio signal transmitting and receiving unit 210 transmits and receives radio signals conforming to NR. The radio signal transmitting and receiving unit 210 can support Massive MIMO, which generates a more directional beam by controlling radio (RF) signals transmitted from multiple antenna elements, Carrier Aggregation (CA), which aggregates and uses multiple component carriers (CCs), and Dual Connectivity (DC), which simultaneously communicates between a UE and two NG-RAN nodes.

[0045] Furthermore, the radio signal transceiver 210 can transmit and receive radio signals in accordance with SBFD, i.e., subband full-duplex (SBFD) in which uplink subbands (UL subbands) and downlink subbands (DL subbands) are allocated non-overlappingly in the frequency direction within a specified time based on time division duplex. In this embodiment, the radio signal transceiver 210 constitutes a communication unit. Of course, the radio signal transceiver 210 may also support duplexing methods such as TDD and FDD (Frequency Division Duplex).

[0046] The amplifier unit 220 is configured by a PA (Power Amplifier) / LNA (Low Noise Amplifier) ​​etc. The amplifier unit 220 amplifies the signal output from the modulation / demodulation unit 230 to a predetermined power level. The amplifier unit 220 also amplifies the RF signal output from the radio signal transmission / reception unit 210.

[0047] The modem unit 230 performs data modulation / demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication destination (e.g., gNB 100). The modem unit 230 may apply Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform - Spread (DFT-S-OFDM). Furthermore, DFT-S-OFDM may be used not only for the uplink (UL) but also for the downlink (DL).

[0048] The control signal and reference signal processor 240 performs processing related to various control signals transmitted and received by the UE 200 and processing related to various reference signals transmitted and received by the UE 200 .

[0049] Specifically, the control signal / reference signal processing unit 240 receives various control signals, for example, control signals of a radio resource control layer (RRC), transmitted via a predetermined control channel from the gNB 100. In addition, the control signal / reference signal processing unit 240 transmits various control signals to the gNB 100 via a predetermined control channel.

[0050] The control signal and reference signal processor 240 performs processing using reference signals (RS) such as a Demodulation Reference Signal (DMRS) and a Phase Tracking Reference Signal (PTRS).

[0051] DMRS is a reference signal (pilot signal) known between the base station and the terminal for estimating the fading channel used for data demodulation, while PTRS is a terminal-specific reference signal for estimating phase noise, which is an issue in high frequency bands.

[0052] In addition to the DMRS and PTRS, the reference signals may also include a Channel State Information-Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), and a Positioning Reference Signal (PRS) for position information.

[0053] The channels include a control channel and a data channel, which may include a PDCCH, a PUCCH (Physical Uplink Control Channel), a RACH (Random Access Channel, Downlink Control Information (DCI) including a Random Access Radio Network Temporary Identifier (RA-RNTI)), a Physical Broadcast Channel (PBCH), etc.

[0054] Furthermore, the data channel includes a PDSCH and a PUSCH (Physical Uplink Shared Channel), etc. Data may refer to data transmitted via a data channel.

[0055] The control signal and reference signal processor 240 may transmit capability information of the UE 200 (UE Capability Information) to the network. Particularly, in this embodiment, the control signal and reference signal processor 240 may transmit capability information related to SBFD. The capability information may include, for example, capabilities related to the configuration of CSI-RS and / or CSI reports in SBFD subbands. Specifically, the capability information may include capabilities related to CSI-RS occasions (reception opportunities) in SBFD symbols or non-SBFD symbols, capabilities related to CSI reports associated with the opportunities, etc.

[0056] The encoding / decoding unit 250 performs data division / concatenation and channel coding / decoding for each predetermined communication destination (gNB 100 or another gNB).

[0057] Specifically, the encoding / decoding unit 250 divides the data output from the data transmitting / receiving unit 260 into pieces of a predetermined size, performs channel coding on the divided data, decodes the data output from the modem unit 230, and concatenates the decoded data.

[0058] The data transmitter / receiver 260 transmits and receives Protocol Data Units (PDUs) and Service Data Units (SDUs). Specifically, the data transmitter / receiver 260 assembles and disassembles PDUs / SDUs in multiple layers (such as the Medium Access Control layer (MAC), the Radio Link Control layer (RLC), and the Packet Data Convergence Protocol layer (PDCP)). The data transmitter / receiver 260 also performs data error correction and retransmission control based on Hybrid Automatic Repeat Request (Hybrid ARQ).

[0059] The control unit 270 controls each functional block constituting the UE 200. In particular, in this embodiment, the control unit 270 can execute control related to SBFD.

[0060] Specifically, the control unit 270 can execute control related to reception of CSI-RS in the SBFD subband and transmission of CSI reports. CSI-RS is a type of reference signal (RS) used to measure radio quality in the downlink (DL). Here, the description is based on the CSI-RS, but it does not necessarily have to be CSI-RS, and other RSs may be used as long as they are reference signals used to measure radio quality in the DL.

[0061] More specifically, the control unit 270 may determine, based on the characteristics of the CSI-RS, whether to assume that CSI-RS resources are not associated with resource blocks other than usable resource blocks (which may be referred to as DL usable PRBs) that can be used as DL subbands. For example, if a predetermined condition is satisfied, the control unit 270 may not assume that the CSI-ReportConfig (or a sub-configuration of the CSI-ReportConfig) is associated with a (Non Zero power (NZP)) CSI-RS resource (for channel measurement and / or interference measurement) configured in a frequency band (freqBand) that includes RBs outside the DL usable PRBs. The predetermined condition will be described later.

[0062] Furthermore, the control unit 270 may assume that the opportunity to receive the CSI-RS (CSI-RSOccasion) is limited to a time position according to SBFD or a time position according to a communication method other than SBFD (for example, TDD). Here, the time position may refer to a position in the time direction of the SBFD subband (UL subband or DL ​​subband). The time period (time unit) may typically refer to a symbol, but may refer to an SBFD symbol here. However, the time unit is not necessarily limited to a symbol, and a slot, minislot, or the like may be used.

[0063] For example, the control unit 270 may assume that the CSI-RS Occasion of the (NZP) CSI-RS resource (for channel measurement and / or interference measurement) associated with the CSI-ReportConfig (or a subset of the CSI-ReportConfig) is restricted to only SBFD symbols or to only non-SBFD symbols.

[0064] In addition, the control unit 270 may assume that the settings regarding reporting of downlink radio quality when SBFD is applied are indicated by at least one of parameters of the radio resource control layer (RRC), a control element (MAC-CE) of the medium access control layer (MAC), or downlink control information (DCI).

[0065] For example, the control unit 270 may assume that whether to target a CSI report when SBFD is used or a CSI report when SBFD is not used is instructed by an RRC parameter of CSI-ReportConfig, a sub-setting of CSI-ReportConfig, or an Activation DCI / MAC CE.

[0066] In addition, the control unit 270 may assume that CSI-RS resources used to measure DL radio quality when SBFD is applied and CSI-RS resources used to measure DL radio quality when a communication method other than SBFD (e.g., TDD) is applied are configured.

[0067] Specifically, control unit 270 may assume that both CSI-RS resources when SBFD is applied and CSI-RS resources when SBFD is not applied are configured. For example, control unit 270 may assume that two CSI-RS resource sets (for channel measurement and / or interference measurement) are configured by CSI-ReportConfig, one CSI-RS resource set (for channel measurement and / or interference measurement) is for SBFD, and the other CSI-RS resource set (for channel measurement and / or interference measurement) is for non-SBFD.

[0068] In addition, the control unit 270 may assume that the UL subband used for reporting the downlink radio quality (CSI report) overlaps with at least a portion of the usable resource blocks (DL usable PRBs) that can be used as DL subbands, or is assigned to resource blocks (RBs) other than the usable resource blocks (DL usable PRBs).

[0069] For example, when UE 200 is configured using a csi-ReportingBand that specifies a reporting band and the band (frequency band) includes a subband that is partially outside a DL usable PRB (i.e., overlaps with RBs outside the DL usable PRB and simultaneously overlaps with RBs within the DL usable PRB), control unit 270 may derive CSI based on the CSI-RS in the SBFD symbol by excluding the RBs located outside the DL usable PRB. Furthermore, control unit 270 may not assume that csi-ReportingBand includes a subband that is completely outside the DL usable PRB.

[0070] Alternatively, the control unit 270 may assume that two CSI report band settings, SBFD and non-SBFD, are configured in the CSI-ReportConfig, one csi-ReportingBand is for non-SBFD, and the other parameter (e.g., csi-ReportingBand-sbfd-r19) is for SBFD.

[0071] Furthermore, when SBFD is applied, control unit 270 may assume that no granularity is applied to the configuration of DL subbands targeted at CSI-RS resources used for measuring downlink radio quality.

[0072] For example, when SBFD is used, the control unit 270 does not need to expect that subband frequency granularity is applied to the CSI.

[0073] (3) Operation of the Wireless Communication System Next, a description will be given of the operation of the wireless communication system 10. Specifically, a description will be given of the operation related to the configuration of the CSI-RS, the measurement using the CSI-RS, and the CSI report when SBFD is applied.

[0074] (3.1) Assumptions and Issues Regarding SBFD, 3GPP has agreed on the term "DL / UL usable PRB," which means a Physical Resource Block (PRB) that can be used as either DL or UL. Specifically, a UL subband frequency resource in an active UL BWP is called a UL usable PRB, and a DL subband frequency resource in an active DL BWP is called a DL usable PRB.

[0075] 5 shows an example of the configuration of UL subbands and DL subbands according to SBFD. As shown in FIG. 5, UL subbands (UL usable PRBs) may be configured in a UL BWP, and DL subbands (DL usable PRBs) may be configured in a DL BWP.

[0076] Also, 3GPP is studying CSI reports related to periodic (P) / semi-static (SP) CSI-RS. Note that static and semi-static (which may also be called semi-persistent) may be interpreted as persistent and semi-persistent. Static may also be interpreted as static, and SP may be interpreted as an intermediate concept between static and dynamic. P may also be interpreted as being repeated with a certain periodicity.

[0077] Specifically, 3GPP is considering an option (Option 1) that specifies two types of settings for CSI reports: a setting associated with SBFD symbols and a setting associated with non-SBFD symbols, or an option (Option 2) that specifies only one type of setting.

[0078] For SBFD-aware UEs, in the case of periodicity where CSI-RS instances occur in both SBFD and non-SBFD symbols in different slots (when all SBFD symbols or all non-SBFD symbols are present in each CSI-RS resource within a slot), the following options are considered for CSI reports associated with periodic / semi-static CSI-RS:

[0079] (Option 1): Use two CSI-ReportConfigs, one associated with SBFD symbols and one associated with non-SBFD symbols.

[0080] (Option 1-1): The first CSI-ReportConfig is associated with a CSI-RS restricted to only SBFD symbols, and the second CSI-ReportConfig is associated with a second CSI-RS restricted to only non-SBFD symbols.

[0081] (Option 1-2): Both CSI-ReportConfigs are associated with the same CSI-RS. The CSI report associated with the first CSI-ReportConfig is derived based on CSI-RS instances with only SBFD symbols. The CSI report associated with the second CSI-ReportConfig is derived based on CSI-RS instances with only non-SBFD symbols.

[0082] (Option 2): One CSI-ReportConfig is used that is associated with both SBFD and non-SBFD symbols.

[0083] (Option 2-1): The first CSI-ReportConfig is associated with two CSI-RSs, each restricted to SBFD symbols and non-SBFD symbols. Separate CSI measurements are derived based on the first and second CSI-RSs, respectively.

[0084] (Option 2-2): One CSI-ReportConfig is associated with one CSI-RS. The CSI report is derived based on the CSI-RS, which can be an SBFD symbol or a non-SBFD symbol at different time instances.

[0085] Note that whether CSI-RS resources can be used for SBFD symbols and non-SBFD symbols may depend on the gNB implementation, e.g., the same or different antenna configurations for both symbols.

[0086] 6 shows example assumptions for operation according to an embodiment. As shown in FIG. 6, CSI reports for one symbol type (SBFD symbols or non-SBFD symbols) or both symbol types (SBFD symbols and non-SBFD symbols) may be applied. For one symbol type, three assumptions (1 to 3) may be applied, and for both symbol types, two assumptions (4 and 5) may be applied.

[0087] Premise 2 corresponds to the above-mentioned Option 1-1, Premise 3 corresponds to Option 1-2, Premise 4 corresponds to Option 2-1, and Premise 5 corresponds to Option 2-2.

[0088] Fig. 7 shows an example of the relationship between the CSI-RS and a CSI report according to premise 1 of Fig. 6. Fig. 8 shows an example of the relationship between the CSI-RS and a CSI report according to premise 2 of Fig. 6. Fig. 9 shows an example of the relationship between the CSI-RS and a CSI report according to premise 3 of Fig. 6. Fig. 10 shows an example of the relationship between the CSI-RS and a CSI report according to premise 4 of Fig. 6. Fig. 11 shows an example of the relationship between the CSI-RS and a CSI report according to premise 5 of Fig. 6. Fig. 12 shows an example of a communication sequence related to a CSI report.

[0089] As shown in FIGS. 7 to 12, the UE can receive a CSI-RS including a CSI-RS Resource Index (CRI) and measure (estimate) the DL radio channel quality.

[0090] (3.2) Operational Overview The following operational examples may be included regarding the configuration of CSI-RS and CSI report when using SBFD subbands.

[0091] (Operational Example 1): Restriction of CSI-RS frequency resources associated with a CSI report configuration (Operational Example 2): Restriction of CSI-RS opportunities associated with a CSI report configuration (Operational Example 3): SBFD / non-SBFD type of CSI report configuration (or sub-configuration) (Alt 1): Explicit configuration of CSI report configuration (or sub-configuration) (Alt 2): Implicit indication by CSI report band (Alt 3): Pre-definition by rule (Operational Example 4): Extended CSI-RS configuration for sub-configuration of CSI-ReportConfig (Operational Example 5): Extension / restriction of CSI report band configuration Reporting sub-bands that partially overlap with DL usable PRBs The CSI based on the CSI-RS Occasion of an SBFD symbol may be derived by excluding RBs located outside the DL usable PRBs.

[0092] - Reporting sub-bands located outside the DL usable PRB - (Alt 1): It is not expected that the csi-ReportingBand will include sub-bands outside the DL usable PRB.

[0093] (Alt 2): CSI is derived by excluding subbands outside the DL usable PRB.

[0094] Extension of CSI report band configuration (Option 1): Two CSI report band configurations, one for SBFD and one for non-SBFD, are configured by CSI-ReportConfig. One csi-ReportingBand may be for non-SBFD, and the other (e.g., csi-ReportingBand-sbfd-r19) may be for SBFD.

[0095] (Option 2): A separate csi-ReportingBand may be configured for each sub-setting.

[0096] (Operation Example 6): Extension / Limitation of CSI Report Frequency Granularity Setting (Alt 1): Subband frequency granularity is not set for SBFD CSI.

[0097] ・(Alt 2): Wideband frequency granularity is applied to CSI for SBFD.

[0098] (Alt 3): Two cqi-FormatIndicator (or pmi-FormatIndicator) are set, one for SBFD and one for non-SBFD.

[0099] (Alt 4): In each sub-setting, a separate cqi-FormatIndicator (or pmi-FormatIndicator) is set.

[0100] Operation example 1 is mainly for the above-mentioned premise 1. Operation example 2 is mainly for the premise 2 and 4. Operation example 3 is for the premise 3 and 5. Operation example 4 is for the premise 4 and 5. Operation examples 5 and 6 can be applied to all the premise.

[0101] (3.3) Operational Example 1 This operational example relates to a restriction on frequency resources of CSI-RS associated with a CSI report configuration. Specifically, if one or more of the following conditions are met, the UE may not assume that the CSI-ReportConfig (or a sub-configuration of the CSI-ReportConfig) is associated with (NZP) CSI-RS resources (for channel measurement and / or interference measurement) configured in a frequency band (freqBand) that includes RBs outside the DL usable PRB:

[0102] (Condition 1): CSI-RS resources (for channel measurement and / or interference measurement) that include (NZP) opportunities for SBFD symbols (and non-SBFD symbols).

[0103] (Condition 2): (NZP) CSI-RS resources are periodic, semi-static or aperiodic CSI-RS.

[0104] (Condition 3a): CSI-ReportConfig (or a sub-configuration of CSI-ReportConfig) is configured with a csi-ReportingBand that includes sub-bands that overlap with RBs outside the DL usable PRB.

[0105] (Condition 3b): CSI-ReportConfig (or a sub-configuration of CSI-ReportConfig) is configured with a csi-ReportingBand that includes sub-bands that are completely outside the DL usable PRB.

[0106] (Condition 4): CSI-ReportConfig is a periodic, semi-static, or aperiodic CSI report.

[0107] (Condition 5): CSI-ReportConfig (or a sub-configuration of CSI-ReportConfig) is configured with subband frequency granularity.

[0108] Note that new conditions may be defined that combine multiple of the above-mentioned conditions. This operation example is mainly for premise 1 (see FIG. 6 ). However, application to other premise is not excluded. Note that this operation example may also be applied to premise 2 to 5 if CSI-RS overlapping with RBs outside the DL usable PRB is not supported. If non-contiguous CSI-RS resources spanning two DL subbands are realized by excluding RBs outside the DL usable PRB of the SBFD symbol, operation example 2 may not be applicable to premise 2 to 5.

[0109] Fig. 13 shows an example of restriction of CSI-RS frequency resources according to Operation Example 1 (for premise 1). Fig. 14 shows an example of restriction of CSI-RS frequency resources according to Operation Example 1 (for premise 2). Fig. 15 shows an example of restriction of CSI-RS frequency resources according to Operation Example 1 (for premise 3). Fig. 16 shows an example of restriction of CSI-RS frequency resources according to Operation Example 1 (for premise 4). Fig. 17 shows an example of restriction of CSI-RS frequency resources according to Operation Example 1 (for premise 5). In Figs. 13 to 17, the restricted CSI-RS frequency resources are indicated by dotted frames.

[0110] (3.4) Operational Example 2 This operational example relates to restricting CSI-RS opportunities for CSI-RS associated with a CSI report configuration. For example, a UE may assume that the (NZP) CSI-RS opportunities for CSI-RS resources (for channel measurement and / or interference measurement) associated with a CSI-ReportConfig (or sub-configuration) are restricted to only SBFD symbols or only non-SBFD symbols.

[0111] The UE may also assume that the (NZP) CSI-RS opportunities of the CSI-RS resources (for channel measurement and / or interference measurement) in one CSI-RS resource set are limited to only SBFD symbols or only non-SBFD symbols. This operation example is mainly for assumptions 2 and 4.

[0112] (3.5) Operation Example 3 This operation example relates to the SBFD / non-SBFD type of the CSI report configuration (or sub-configuration). Specifically, any of the following operations may be performed.

[0113] (Alt 1): Explicit configuration of CSI report configuration (or sub-configuration) "SBFD CSI report" or "non-SBFD CSI report" is indicated by the RRC parameters of CSI-ReportConfig, a sub-configuration of CSI-ReportConfig, or activation DCI / MAC CE. If "SBFD CSI report" is specified in CSI-ReportConfig, the CSI in CSI-ReportConfig may be derived based on CSI-RS of SBFD symbols only. If "non-SBFD CSI report" is specified in CSI-ReportConfig, the CSI in CSI-ReportConfig may be derived based on CSI-RS of non-SBFD symbols only.

[0114] If "SBFD CSI report" is specified for a subset, the CSI for the subset may be derived based on CSI-RS for SBFD symbols only. If "non-SBFD CSI report" is specified for a subset, the CSI for the subset may be derived based on CSI-RS for non-SBFD symbols only.

[0115] (Alt 2): Implicit indication by CSI report band If csi-ReportingBand is set in CSI-ReportConfig and includes a subband completely outside the DL usable PRB, the CSI report configuration may be derived based on CSI-RS of non-SBFD symbols only. Otherwise, the CSI of the report configuration may be derived based on CSI-RS of SBFD symbols only.

[0116] Note that the CSI for the report configuration may be derived based on the CSI-RS of the SBFD symbol or a symbol other than SBFD.

[0117] (Alt 3): Predefined by rules If two subsets in a CSI-ReportConfig are associated with the same CSI-RS resource and configured with the same port number and power, the first subset (or the subset with an odd / even subset index) may be derived based on CSI-RS of only SBFD symbols / non-SBFD symbols, and the second subset (or the subset with an odd / even subset index) may be derived based on CSI-RS of only SBFD symbols / non-SBFD symbols.

[0118] (3.6) Operational Example 4 This operational example relates to an extended CSI-RS configuration for a sub-configuration of CSI-ReportConfig. Specifically, any of the following options may be applied:

[0119] (Option 1): Two CSI-RS resource sets (for channel measurement and / or interference measurement) are configured in CSI-ReportConfig.

[0120] One CSI-RS resource set (for channel measurement and / or interference measurement) may be for SBFD, and the other CSI-RS resource set (for channel measurement and / or interference measurement) may be for non-SBFD.

[0121] If two CSI-RS resource sets (for channel and / or interference measurements) are configured in CSI-ReportConfigSBFD and non-SBFD, it may be explicitly configured in the sub-configuration whether the sub-configuration is associated with the first or second resource set.

[0122] For example, the parameter "sbfd" or "non-sbfd" may be configured for each subset. If a subset is configured with "sbfd", the nzp-CSI-RS-ResourceList of the subset may indicate CSI-RS resources in the corresponding CSI-RS resource set for SBFD. Otherwise, the nzp-CSI-RS-ResourceList of the subset may indicate CSI-RS resources in the corresponding CSI-RS resource set for non-SBFD.

[0123] The UE may assume that (NZP) CSI-RS resources (for channel and / or interference measurements) within an SBF / non-SBFD CSI-RS resource set are restricted to only SBFD / non-SBFD symbols.

[0124] (Option 2): A separate CSI-RS resource set is configured for each sub-configuration.

[0125] If a CSI-RS resource set is configured for a subset, the nzp-CSI-RS-ResourceList of the subset may indicate the CSI-RS resources in the corresponding CSI-RS resource set. Otherwise, the nzp-CSI-RS-ResourceList of the subset may indicate the CSI-RS resources in the CSI-RS resource set of the CSI-ReportConfig.

[0126] Fig. 18 illustrates an example configuration of CSI-ReportConfig according to option 2 of operation example 4. As illustrated in Fig. 18, sub-configurations (Sub-config#0, 1) may be associated with CSI-RS resources.

[0127] (3.7) Operational Example 5 This operational example relates to an extension / restriction of CSI report band configuration. The reporting subband may partially overlap with a DL usable PRB. When a UE is configured using a csi-ReportingBand and the csi-ReportingBand includes a subband that is partially outside a DL usable PRB (i.e., overlapping with RBs outside a DL usable PRB and simultaneously overlapping with RBs within a DL usable PRB), the CSI derived based on the CSI-RS in the SBFD symbol may be derived based on excluding RBs outside the DL usable PRB.

[0128] If the reporting subband is completely outside the DL usable PRB, one of the following actions may be performed:

[0129] (Alt 1): Do not assume that the csi-ReportingBand includes subbands that are completely outside the DL usable PRB.

[0130] (Alt 1-1): If the CSI-ReportConfig is associated with a CSI-RS resource (for channel measurement and / or interference measurement) that has SBFD and non-SBFD symbol opportunities (NZP), the UE does not assume that the CSI-ReportConfig is configured with a csi-ReportingBand and includes subbands completely outside the DL usable PRB (case 1).

[0131] (Alt 1-2): If a CSI-ReportConfig or a subset of a CSI-ReportConfig is associated with a CSI-RS resource (for channel measurement and / or interference measurement) with SBFD symbol opportunities (NZP), the UE does not assume that it is configured with a csi-ReportingBand that includes subbands that are completely outside the DL usable PRB (in the case of Assumptions 2 and 4).

[0132] (Alt 1-3): If the CSI-ReportConfig or a subset of the CSI-ReportConfig is configured with "SBFD symbol type", the UE does not assume that it is configured with a csi-ReportingBand that includes subbands that are completely outside the DL usable PRB (in the case of Assumptions 3 and 5).

[0133] (Alt 2): CSI is derived based on excluding subbands that are completely outside the DL usable PRB.

[0134] (Alt 2-1): If the CSI-ReportConfig is associated with a CSI-RS resource (for channel measurement and / or interference measurement) having (NZP) SBFD symbol opportunities and non-SBFD symbol opportunities, the CSI-ReportConfig is configured with a csi-ReportingBand, and the subband in question is located completely outside the DL usable PRB, the CSI (derived based on the CSI-RS opportunities of the SBFD symbols) may be derived based on the exclusion of the subband (in the case of premise 1).

[0135] (Alt 2-2): If a CSI-ReportConfig or a sub-configuration of a CSI-ReportConfig is associated with a CSI-RS resource (for channel measurement and / or interference measurement) with SBFD symbol opportunities (NZP), the CSI-ReportConfig is configured with a csi-ReportingBand, and the sub-band is completely outside the DL usable PRB, the CSI may be derived based on the exclusion of the sub-band (for Assumptions 2 and 4).

[0136] (Alt 2-3): If CSI-ReportConfig or a sub-configuration of CSI-ReportConfig is configured with "SBFD symbol type", CSI-ReportConfig is configured with csi-ReportingBand, and the sub-band is completely outside the DL usable PRB, CSI may be derived based on the exclusion of the sub-band (for Assumptions 3 and 5).

[0137] Regarding the extension of the CSI report band configuration, one of the following options may be applied:

[0138] (Option 1): Two CSI report band settings, SBFD and non-SBFD, are configured in CSI-ReportConfig, one csi-ReportingBand for non-SBFD and the other parameter (e.g., csi-ReportingBand-sbfd-r19) for SBFD (for Assumptions 1, 4, and 5).

[0139] The UE does not need to assume that csi-ReportingBand-sbfd-r19 includes subbands completely outside the DL usable PRB. In the case of premise 1, in CSI calculation based on CSI-RS occasions of SBFD symbols, csi-ReportingBand-sbfd-r19 may be applied to the CSI report band. Also, in CSI calculation based on CSI-RS occasions of non-SBFD symbols, csi-ReportingBand may be applied to the CSI report band.

[0140] In the case of premise 4, in the CSI calculation of a subset associated with a CSI-RS opportunity limited only by SBFD symbols, csi-ReportingBand-sbfd-r19 may be applied to the CSI report band, and in the CSI calculation of a subset associated with a CSI-RS opportunity limited only by non-SBFD symbols, csi-ReportingBand may be applied to the CSI report band.

[0141] In the case of premise 5, in CSI calculation of the SBFD type subsetting, csi-ReportingBand-sbfd-r19 may be applied to the CSI report band. Also, in CSI calculation of the non-SBFD type subsetting, csi-ReportingBand may be applied to the CSI report band.

[0142] (Option 2): A separate csi-ReportingBand is configured for each sub-setting.

[0143] This option may be applied to Assumptions 4 and 5. In Assumption 4, if a subset is associated with CSI-RS resources limited by SBFD symbols, the UE may not assume that the subset is configured using the csi-ReportingBand and includes subbands that are completely outside the DL usable PRB.

[0144] In premise 5, if the sub-configuration is configured with the SBFD type, the UE does not need to assume that the sub-configuration is configured using the csi-ReportingBand and includes subbands that are completely outside the DL usable PRB.

[0145] (3.8) Operation Example 6 This operation example relates to setting extension / limitation of CSI report frequency granularity. Specifically, any of the following operations may be performed.

[0146] ・(Alt 1): Subband frequency granularity is not assumed to be applied to SBFD CSI.

[0147] (Alt 1-1): If the CSI-ReportConfig is associated with (NZP) CSI-RS resources (for channel and / or interference measurements) with SBFD and non-SBFD symbol opportunities, the UE does not need to assume a cqi-FormatIndicator (or pmi-FormatIndicator) indicating "subband CQI" (or "subband PMI") (in the case of premise 1).

[0148] (Alt 1-2): If a CSI-ReportConfig or a subset of a CSI-ReportConfig is associated with a (NZP) CSI-RS resource (for channel and / or interference measurements) with an occurrence of an SBFD symbol, the UE may not assume a cqi-FormatIndicator (or pmi-FormatIndicator) indicating "subbandCQI" (or "subbandPMI") (in the case of Assumptions 2 and 4).

[0149] (Alt 1-3): If CSI-ReportConfig or a subset of CSI-ReportConfig is configured with "SBFD symbol type", the UE does not need to assume a cqi-FormatIndicator (or pmi-FormatIndicator) indicating "subbandCQI" (or "subbandPMI") (in the case of Assumptions 3 and 5).

[0150] Note that if the number of RBs indicated by the csi-ReportingBand in the DL usable PRB is smaller than a certain value, the UE may not assume the cqi-FormatIndicator (or pmi-FormatIndicator) indicating "subbandCQI" (or "subbandPMI") (the value may be defined by the 3GPP specifications or may be set by the gNB).

[0151] - (Alt 2): Wideband frequency granularity is applied to CSI for SBFD.

[0152] (Alt 2-1): If the CSI-ReportConfig is associated with (NZP) CSI-RS resources (for channel measurement and / or interference measurement) and SBFD symbol opportunities and non-SBFD symbol opportunities, wideband frequency granularity may be applied to the CSI report (which may be derived based on the CSI-RS opportunities of the SBFD symbols) (in the case of premise 1).

[0153] (Alt 2-2): If a CSI-ReportConfig or a subset of a CSI-ReportConfig is associated with a (NZP) CSI-RS resource (for channel measurement and / or interference measurement) and an SBFD symbol opportunity, wideband frequency granularity may be applied to the CSI report (in the case of Assumptions 2 and 4).

[0154] (Alt 2-3): If CSI-ReportConfig or a subset of CSI-ReportConfig is configured with "SBFD symbol type", wideband frequency granularity may be applied to the CSI report (in the case of premise 3.5).

[0155] Note that if the number of RBs indicated by the csi-ReportingBand in the DL usable PRB is smaller than a specific value (the value may be defined by the 3GPP specifications or may be set by the gNB), the wideband frequency granularity may be applied. Otherwise, the frequency granularity may be determined based on the granularity setting.

[0156] (Alt 3): The two cqi-FormatIndicator (or pmi-FormatIndicator) settings, SBFD and non-SBFD, are configured in the CSI-ReportConfig, respectively.

[0157] One cqi-FormatIndicator (or pmi-FormatIndicator) may be for non-SBFD, and the other parameter (e.g., cqi-FormatIndicator-sbfd-r19 or pmi-FormatIndicator-sbfd-r19) may be for SBFD.

[0158] The UE may not assume that cqi-FormatIndicator-sbfd-r19 or pmi-FormatIndicator-sbfd-r19 indicates "subbandCQI" (or "subbandPMI").

[0159] In the case of premise 1, in CSI calculation based on CSI-RS occurrence in SBFD symbols, cqi-FormatIndicator-sbfd-r19 or pmi-FormatIndicator-sbfd-r19 may be applied to the granularity of the frequency of CSI reports. In CSI calculation based on CSI-RS occurrence in non-SBFD symbols, cqi-FormatIndicator (or pmi-FormatIndicator) may be applied to the granularity of the frequency of CSI reports.

[0160] In the case of premise 4, in CSI calculation based on subsetting related to CSI-RS limited by only SBFD symbols, cqi-FormatIndicator-sbfd-r19 or pmi-FormatIndicator-sbfd-r19 may be applied to the frequency granularity of the CSI report. In CSI calculation based on subsetting related to the occurrence of CSI-RS limited by only non-SBFD symbols, cqi-FormatIndicator (or pmi-FormatIndicator) may be applied to the frequency granularity of the CSI report.

[0161] In the case of premise 5, in CSI calculation based on the SBFD-type subsetting, cqi-FormatIndicator-sbfd-r19 or pmi-FormatIndicator-sbfd-r19 may be applied to the granularity of the frequency of CSI reports. In CSI calculation based on the non-SBFD-type subsetting, cqi-FormatIndicator (or pmi-FormatIndicator) may be applied to the granularity of the frequency of CSI reports.

[0162] (Alt 4): A separate cqi-FormatIndicator (or pmi-FormatIndicator) is set for each sub-setting.

[0163] In premise 4, if a subset is associated with CSI-RS resources limited by SBFD symbols, the UE need not assume that cqi-FormatIndicator-sbfd-r19 or pmi-FormatIndicator-sbfd-r19 indicates "subbandCQI" (or "subbandPMI") for the subset.

[0164] In premise 5, if a sub-configuration is configured with the SBFD type, the UE does not need to assume that cqi-FormatIndicator-sbfd-r19 or pmi-FormatIndicator-sbfd-r19 indicates "subbandCQI" (or "subbandPMI") for the sub-configuration.

[0165] (3.9) Modification Examples Whether to apply any of the above-described operation examples (including options, etc.) may be defined by the 3GPP specifications and / or may be set / instructed by the gNB.

[0166] Different operation examples (including options, etc.) may be applied to a CSI report using wideband frequency granularity and a CSI report using subband frequency granularity. Different operation examples (including options, etc.) may be applied to a CSI report including a different reporting quantity. Different operation examples (including options, etc.) may be applied to a P / SP / AP CSI report. Different operation examples (including options, etc.) may be applied to a PUCCH or PUSCH CSI report.

[0167] (3.10) UE Capability A UE may report the presence or absence of the following capabilities (UE Capability Information) regarding SBFD to the network. The UE Capability Information may be defined for each UE, frequency range (FR), frequency channel (FC), etc. Furthermore, RRC signaling and configuration for reporting the UE Capability Information may be defined.

[0168] Support for one CSI report configuration associated with CSI-RS opportunities restricted to only SBFD symbols / non-SBFD symbols Support for one CSI report configuration associated with CSI-RS opportunities with SBFD symbols / non-SBFD symbols Support for CSI with a CSI report configuration derived based on CSI-RS opportunities with SBFD symbols / non-SBFD symbols Support for a CSI report configuration configured with "SBFD / non-SBFD type" Support for one CSI report configuration including a sub-configuration associated with CSI-RS opportunities restricted to only SBFD symbols / non-SBFD symbols Support for one CSI report configuration including a sub-configuration associated with CSI-RS opportunities with SBFD symbols / non-SBFD symbols Support for CSI with a sub-configuration derived based on CSI-RS opportunities with SBFD symbols / non-SBFD symbols Support for a CSI sub-configuration configured with "SBFD / non-SBFD type" According to the above-described operational examples, the UE may apply reasonable assumptions regarding the limitations on CSI-RS frequency resources and CSI-RS opportunities associated with a CSI report configuration when SBFD is applied. The UE may also apply reasonable assumptions regarding the SBFD / non-SBFD type of the CSI report configuration (or sub-configuration), the extended CSI-RS configuration for the sub-configuration of CSI-ReportConfig, and the configuration extension / restriction of the CSI report frequency granularity.

[0169] Therefore, when using the SBFD subband, more appropriate and efficient CSI reports can be transmitted, which may contribute to reducing energy consumption (NES) across the entire network.

[0170] (4) Other Embodiments Although the embodiments have been described above, it will be obvious to those skilled in the art that the present invention is not limited to the description of the embodiments, and that various modifications and improvements are possible.

[0171] For example, in the above-described embodiment, the term "subband" is used, but the subband may simply be called a "band," or may be called by other similar terms such as an auxiliary band, a spare band, etc. Furthermore, XDD / SBFD may be a provisional name, and may be called by other similar terms as described above.

[0172] Also, in the above description, configure, activate, update, indicate, enable, specify, and select may be interchangeable. Similarly, link, associate, correspond, and map may be interchangeable, and allocate, assign, monitor, and map may be interchangeable.

[0173] Furthermore, specific, dedicated, UE-specific, and UE-dedicated may be interchangeable. Similarly, common, shared, group-common, UE-common, and UE-shared may be interchangeable.

[0174] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," etc. may be used interchangeably.

[0175] The block diagram ( FIG. 4 ) used to explain the above-described embodiment shows functional blocks. These functional blocks (components) are realized by any combination of hardware and / or software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (e.g., wired, wireless, etc.) and these multiple devices. The functional block may also be realized by combining software with the single device or multiple devices.

[0176] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how each is implemented.

[0177] Furthermore, the above-described gNB100 and UE200 (the devices) may function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 19 is a diagram showing an example of the hardware configuration of the devices. As shown in Figure 19, the devices may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0178] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of the apparatus may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0179] Each functional block of the device (see FIG. 4) is realized by any hardware element of the computer device or a combination of the hardware elements.

[0180] In addition, each function of the device is realized by loading specified software (programs) onto hardware such as processor 1001 and memory 1002, causing processor 1001 to perform calculations, control communication via communication device 1004, and control at least one of reading and writing data in memory 1002 and storage 1003.

[0181] The processor 1001 controls the entire computer by running, for example, an operating system, and may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control unit, an arithmetic unit, and registers.

[0182] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. Furthermore, the various processes described above may be executed by a single processor 1001, or may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line.

[0183] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The memory 1002 may also be called a register, a cache, a main memory (primary storage device), etc. The memory 1002 may store a program (program code), a software module, etc., capable of executing a method according to an embodiment of the present disclosure.

[0184] Storage 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. Storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned recording medium may be, for example, a database, a server, or other suitable medium including at least one of memory 1002 and storage 1003.

[0185] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, or a communication module.

[0186] The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize, for example, at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD).

[0187] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0188] Furthermore, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0189] Furthermore, the device may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0190] Furthermore, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB))), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0191] Each aspect / embodiment described in the present disclosure may be applied to at least one of a system using Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, a 4th generation mobile communication system (4G), a 5th generation mobile communication system (5G), a 6th generation mobile communication system (6G), an xth generation mobile communication system (xG) (where x is, for example, an integer or a decimal), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable system, and a next-generation system extended based on these. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G) may also be applied.

[0192] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0193] In the present disclosure, a specific operation described as being performed by a base station may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal may be performed by at least one of the base station and another network node other than the base station (e.g., MME or S-GW, etc., but are not limited to these). Although the above example illustrates a case where there is one other network node other than the base station, a combination of multiple other network nodes (e.g., MME and S-GW) may also be used.

[0194] Information, signals (information, etc.) may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input and output via multiple network nodes.

[0195] The input and output information may be stored in a specific location (for example, a memory) or may be managed using a management table. The input and output information may be overwritten, updated, or added to. The output information may be deleted. The input information may be transmitted to another device.

[0196] The determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0197] The aspects / embodiments described in this disclosure may be used alone, in combination, or switched depending on the implementation. Notification of predetermined information (e.g., notification that "X is true") is not limited to explicit notification, but may be implicit (e.g., not notifying the predetermined information).

[0198] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0199] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0200] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0201] Note that terms described in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0202] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0203] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by an index.

[0204] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0205] In this disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0206] A base station can accommodate one or more (e.g., three) cells (also called sectors). When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head: RRH)).

[0207] The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication services within that coverage area.

[0208] In the present disclosure, the base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.

[0209] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0210] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0211] At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, etc. The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0212] Furthermore, a base station in the present disclosure may be read as a mobile station (user terminal, the same applies hereinafter). For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a mobile station is replaced with communication between multiple mobile stations (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the mobile station may be configured to have the functions of a base station. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel (or sidelink).

[0213] Similarly, a mobile station in the present disclosure may be interpreted as a base station, in which case the base station may have the functions of a mobile station.

[0214] A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0215] Numerology may be communication parameters that apply to the transmission and / or reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0216] A slot may consist of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) A slot may be a numerology-based time unit.

[0217] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0218] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0219] For example, one subframe may be referred to as a transmission time interval (TTI), multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0220] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station schedules each user terminal to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) in TTI units. Note that the definition of TTI is not limited to this.

[0221] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0222] In addition, when one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling, and the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0223] A TTI having a time length of 1 ms may be referred to as a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be referred to as a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0224] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0225] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0226] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI, each of which may consist of one or more resource blocks.

[0227] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0228] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0229] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0230] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0231] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a predetermined signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0232] The above-described structures of the radio frame, subframe, slot, minislot, and symbol are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations may be changed in various ways.

[0233] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0234] The reference signal may also be abbreviated as Reference Signal (RS) and may be called a pilot depending on the applicable standard.

[0235] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0236] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0237] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed therein or that the first element must precede the second element in some way.

[0238] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0239] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0240] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0241] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0242] 20 shows an example of the configuration of a vehicle 2001. As shown in Fig. 20, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013.

[0243] The drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user. The electronic control unit 2010 is composed of a microprocessor 2031, memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals from various sensors 2021 to 2027 provided in the vehicle are input to the electronic control unit 2010. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0244] The signals from the various sensors 2021 to 2028 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front and rear wheels obtained by a rotation speed sensor 2022, an air pressure signal of the front and rear wheels obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0245] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing various types of information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 2012 uses information obtained from external devices via the communication module 2013, etc., to provide various types of multimedia information and multimedia services to the occupants of the vehicle 1.

[0246] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS, etc.), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 2030 also transmits and receives various information via the communication module 2013 to realize driving assistance functions or autonomous driving functions.

[0247] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 1 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from a driving unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, an axle 2009, a microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 2028, which are provided in the vehicle 2001.

[0248] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station, a mobile station, or the like.

[0249] The communication module 2013 transmits, via wireless communication to an external device, a current signal from the current sensor that is input to the electronic control unit 2010. The communication module 2013 also transmits, via wireless communication to an external device, the rotation speed signals of the front and rear wheels acquired by a rotation speed sensor 2022, the air pressure signals of the front and rear wheels acquired by an air pressure sensor 2023, the vehicle speed signal acquired by a vehicle speed sensor 2024, the acceleration signal acquired by an acceleration sensor 2025, the accelerator pedal depression amount signal acquired by an accelerator pedal sensor 2029, the brake pedal depression amount signal acquired by a brake pedal sensor 2026, the shift lever operation signal acquired by a shift lever sensor 2027, and the detection signals for detecting obstacles, vehicles, pedestrians, etc. acquired by an object detection sensor 2028, all of which are input to the electronic control unit 2010.

[0250] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on an information service unit 2012 provided in the vehicle. The communication module 2013 also stores the various information received from the external devices in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, axle 2009, sensors 2021 to 2028, and the like provided in the vehicle 2001.

[0251] 10 Wireless communication system 20 NG-RAN 100 gNB 200 UE 210 Wireless signal transceiver 220 Amplifier 230 Modulation / demodulation unit 240 Control signal / reference signal processing unit 250 Encoding / decoding unit 260 Data transceiver 270 Control unit 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus 2001 Vehicle 2002 Drive unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Left and right front wheels 2008 Left and right rear wheels 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication module 2021 Current sensor 2022 RPM sensor 2023 Air pressure sensor 2024 Vehicle speed sensor 2025 Acceleration sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor 2030 Driving assistance system section 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port

Claims

1. A terminal comprising: a communication unit that transmits and receives radio signals according to a subband full-duplex communication method in which uplink subbands and downlink subbands are allocated non-overlapping in the frequency direction within a specified time based on time division duplex; and a control unit that determines, based on the characteristics of a reference signal used to measure downlink radio quality, whether to assume that resources of the reference signal are not associated with resource blocks other than available resource blocks that can be used as the downlink subband.

2. A terminal comprising: a communication unit that transmits and receives radio signals according to a subband full-duplex communication method in which uplink subbands or downlink subbands are assigned non-overlapping in the frequency direction within a specified time based on time division duplex; and a control unit that assumes that opportunities to receive reference signals used to measure downlink radio quality are limited to time positions according to the subband full-duplex communication method or time positions according to a communication method other than the subband full-duplex communication method.

3. A terminal comprising: a communication unit that transmits and receives radio signals according to a subband full-duplex communication method in which uplink subbands or downlink subbands are allocated non-overlapping in the frequency direction within a specified time based on time division duplex; and a control unit that assumes that settings related to reporting of downlink radio quality when the subband full-duplex communication method is applied are instructed by at least one of parameters of a radio resource control layer, control elements of a medium access control layer, or downlink control information.

4. A terminal comprising: a communication unit that transmits and receives radio signals according to a subband full-duplex communication method in which uplink subbands or downlink subbands are allocated non-overlapping in the frequency direction within a specified time based on time division duplex; and a control unit that assumes that resources of reference signals used to measure downlink radio quality when the subband full-duplex communication method is applied and resources of reference signals used to measure downlink radio quality when a communication method other than the subband full-duplex communication method is applied are set.

5. A terminal comprising: a communication unit that transmits and receives radio signals according to a subband full-duplex communication method in which uplink subbands or downlink subbands are allocated non-overlapping in the frequency direction within a specified time based on time division duplex; and a control unit that assumes that the uplink subbands used for reporting downlink radio quality overlap with at least a portion of available resource blocks that can be used as the downlink subbands, or are allocated to resource blocks other than the available resource blocks.

6. A terminal comprising: a communication unit that transmits and receives radio signals according to a subband full-duplex communication method in which uplink subbands or downlink subbands are allocated non-overlapping in the frequency direction within a specified time based on time division duplex; and a control unit that, when the subband full-duplex communication method is applied, assumes that no granularity is applied to the setting of the downlink subbands targeted at resources of reference signals used to measure downlink radio quality.

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