Terminal and wireless base station

Abstract

This terminal: transmits and receives a radio signal in accordance with a sub-band full-duplex communication system 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 the time division duplex; and receives a message including a higher-layer parameter indicating which of the uplink sub-band or the downlink sub-band is allocated. The terminal controls uplink transmission in the uplink sub-band or downlink reception in the downlink sub-band on the basis of the parameter.

Description

Terminals and wireless base stations

[0001] The present disclosure relates to a terminal and a radio base station that support 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 considering an extension of the duplex method (Non-Patent Document 1). Specifically, regarding Sub-Band non-overlapping Full Duplex (SBFD), a duplex method that enables simultaneous use of downlink (DL) and uplink (UL) within a carrier in a time division duplex (TDD) band, it has been agreed to consider how a terminal (User Equipment, UE) should handle a collision between UL transmission in the UL sub-band and DL reception in the DL sub-band.

[0004] "New WID: Evolution of NR duplex operation: Sub-band full duplex (SBFD)", RP-234035, 3GPP TSG RAN Meeting #102, 3GPP, December 2023

[0005] In the 3GPP Release 18 specifications, a UE cannot know in advance whether a UL subband or a DL subband will be assigned to a frequency domain at a specified time (e.g., symbol or slot) when SBFD is applied.

[0006] For this reason, when the allocation of UL subbands and DL subbands is changed dynamically or frequently within the specified time, it is not possible to flexibly respond to such changes, and there is still room for further improvement.

[0007] Therefore, the following disclosure has been made in consideration of this situation, and aims to provide a terminal and a radio base station that can respond more flexibly even in cases where the allocation of SBFD UL subbands and DL subbands is changed dynamically or frequently.

[0008] 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 and downlink subbands are allocated non-overlappingly in the frequency direction within a specified time period based on time division duplexing, a receiving unit (control signal / reference signal processing unit 240) that receives a message including upper layer parameters indicating which of the uplink subbands or the downlink subbands is allocated, and a control unit (control unit 270) that controls uplink transmission in the uplink subbands or downlink reception in the downlink subbands based on the parameters.

[0009] 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 assigned non-overlappingly in the frequency direction within a specified time period based on time division duplex; a receiving unit that receives downlink control information indicating which of the uplink subbands or the downlink subbands is assigned; and a control unit that controls uplink transmission in the uplink subbands or downlink reception in the downlink subbands based on the downlink control information.

[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; a receiving unit that receives a message including upper layer parameters indicating which of the uplink subbands or the downlink subbands is allocated, and downlink control information indicating which of the uplink subbands or the downlink subbands is allocated; and a control unit that, when the parameters do not indicate whether the uplink subbands or the downlink subbands are allocated, controls uplink transmission in the uplink subbands or downlink reception in the downlink subbands based on the downlink control information.

[0011] One aspect of the present disclosure is a radio base station (gNB100) that includes 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 transmission unit that transmits a message including upper layer parameters indicating which of the uplink subbands or the downlink subbands is allocated.

[0012] One aspect of the present disclosure is a radio base station 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 assigned non-overlappingly in the frequency direction within a specified time period based on time division duplex; and a transmission unit that transmits downlink control information indicating which of the uplink subbands or the downlink subbands is assigned.

[0013] FIG. 1 is a diagram showing an overall schematic configuration of a wireless communication system 10. FIG. 2 is a diagram showing example configurations of radio frames, subframes, and slots used in the wireless communication system 10. FIG. 3 is a diagram showing example configurations of TDD and XDD / SBFD. FIG. 4 is a functional block configuration diagram of a gNB 100 and a UE 200. FIG. 5 is a diagram showing an example sequence of SBFD configuration according to operation example 1 (option 1-1). FIG. 6 is a diagram showing an example sequence of SBFD configuration according to operation example 1 (option 1-2). FIG. 7 is a diagram showing an example sequence of SBFD configuration according to operation example 2 (option 2-1). FIG. 8 is a diagram showing an example sequence of SBFD configuration according to operation example 2 (option 2-2). FIG. 9 is a diagram showing an example of the hardware configuration of a gNB 100 and a UE 200. FIG. 10 is a diagram showing an example configuration of a vehicle 2001.

[0014] (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.

[0015] 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 .

[0016] 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."

[0017] 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.

[0018] 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.

[0019] 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.

[0020] The wireless communication system 10 may also support multiple frequency ranges (FR). Specifically, the wireless communication system 10 may support the following frequency ranges:

[0021] ・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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] If the 14 symbols / slot configuration is maintained, the larger (wider) the SCS, the shorter the symbol period (and slot period). The time direction may be called the time domain, symbol period, symbol length, or symbol time. The frequency direction may be called the frequency domain, resource block, subcarrier, or BWP (Bandwidth part).

[0028] 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.

[0029] 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.

[0030] 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).

[0031] 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.

[0032] 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).

[0033] 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).

[0034] 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.

[0035] On the other hand, in XDD / SBFD, which is being considered in 3GPP Release 18, gNB100 can instruct UE200 to configure specific frequency resources (e.g., subbands) as DL and other frequency resources as UL at a specified time T, such as a symbol.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] (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.

[0040] 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.

[0041] 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. 9.

[0042] 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.

[0043] 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).

[0044] 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.

[0045] 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).

[0046] The control signal and reference signal processor 240 executes 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 .

[0047] 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.

[0048] The control signal / reference signal processor 240 performs processing using reference signals (RS) such as a Demodulation Reference Signal (DMRS) and a Phase Tracking Reference Signal (PTRS).

[0049] DMRS is a terminal-specific reference signal (pilot signal) known between the base station and the terminal to estimate the fading channel used for data demodulation, while PTRS is a terminal-specific reference signal intended to estimate phase noise, which is an issue in high frequency bands.

[0050] 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.

[0051] The channels include a control channel and a data channel, and the control channel 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.

[0052] 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.

[0053] The control signal and reference signal processor 240 may transmit capability information of the UE 200 (UE Capability Information) to the network. The control signal and reference signal processor 240 may also receive a message including higher layer parameters indicating whether a UL subband or a DL subband is to be allocated. In this embodiment, the control signal and reference signal processor 240 may constitute a receiver that receives the message including the higher layer parameters.

[0054] Specifically, the control signal and reference signal processor 240 may receive an RRC message including tdd-UL-DL-ConfigurationDedicated. tdd-UL-DL-ConfigurationDedicated is a type of RRC layer parameter and may be interpreted as an information element (IE) or a field constituting the IE. tdd-UL-DL-ConfigurationDedicated may be included in, for example, ServingCellConfig (see 3GPP TS38.331) that defines the configuration of a serving cell.

[0055] As described above, the parameter may be notified by higher layer signaling (e.g., RRC), but may also be notified by lower layer signaling (e.g., MAC-CE). Hereinafter, signaling from the network may include signaling from higher or lower layers.

[0056] The control signal and reference signal processor 240 includes downlink control information (DCI) indicating whether a UL subband or a DL subband is allocated. The DCI may be interpreted as control information transmitted in the downlink (DL), including scheduling information required for each user equipment (UE) to demodulate data, information on data modulation and channel coding rate, etc. In this embodiment, the control signal and reference signal processor 240 may constitute a receiver that receives the downlink control information.

[0057] The DCI may reuse, for example, the indication (display) of a dynamic SFI (Slot Format Indication) in DCI format 2_0.

[0058] Alternatively, the DCI may conform to a new DCI format. Note that other signaling (for example, MAC-CE) may be used instead of DCI.

[0059] In addition, the control signal / reference signal processing unit 240 may receive a message including upper layer parameters indicating whether a UL subband or a DL subband is to be allocated, and downlink control information indicating whether a UL subband or a DL subband is to be allocated.

[0060] Specifically, the control signal and reference signal processor 240 may receive an RRC message including the above-mentioned tdd-UL-DL-ConfigurationDedicated and DCI (or signaling of another layer) indicating whether a UL subband or a DL subband is allocated. It is preferable that the parameters and the DCI are received within a predetermined time, but they do not necessarily have to be received simultaneously. That is, there may be a certain time difference between the reception of the parameters and the reception of the DCI.

[0061] The encoding / decoding unit 250 performs data division / concatenation and channel coding / decoding for each predetermined communication destination (gNB 100 or another gNB).

[0062] 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.

[0063] 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 a Medium Access Control layer (MAC), a Radio Link Control layer (RLC), and a 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).

[0064] 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.

[0065] Specifically, the control unit 270 can control uplink transmission in the UL subband or downlink reception in the DL subband based on a parameter of a higher layer indicating whether the UL subband or the DL subband is allocated.

[0066] More specifically, when the parameter indicates that a UL subband is to be allocated, the control unit 270 may perform UL transmission in the UL subband.Furthermore, when the parameter indicates that a DL subband is to be allocated, the control unit 270 may perform DL reception in the DL subband.

[0067] Furthermore, the control unit 270 can also control uplink transmission in the UL subband or downlink reception in the DL subband based on DCI indicating whether the UL subband or the DL subband is allocated. Specifically, when the DCI indicates that the UL subband is allocated, the control unit 270 may perform UL transmission in the UL subband. Furthermore, when the DCI indicates that the DL subband is allocated, the control unit 270 may perform DL reception in the DL subband.

[0068] If the parameter of the higher layer does not indicate whether to allocate a UL subband or a DL subband, the control unit 270 may control uplink transmission in the UL subband or downlink reception in the DL subband based on the DCI.

[0069] Here, the UL subband or DL ​​subband allocation instruction according to the parameter may be interpreted as semi-static subband configuration, and the UL subband or DL ​​subband allocation instruction according to the DCI may be interpreted as dynamic subband configuration, which may override the semi-static subband configuration.

[0070] Furthermore, the gNB100 may have functions corresponding to the functions of the above-mentioned UE 200. Specifically, the radio signal transceiver 210 of the gNB100 may constitute a communication unit that transmits and receives radio signals according to a subband full-duplex communication scheme in which UL subbands or DL ​​subbands are allocated non-overlappingly in the frequency direction within a specified time period based on time division duplex, and the control signal and reference signal processor 240 of the gNB100 may constitute a transmission unit that transmits a message including upper layer parameters indicating which of the UL subbands or DL ​​subbands is allocated.

[0071] In addition, the control signal / reference signal processing unit 240 of the gNB 100 may constitute a transmission unit that transmits downlink control information indicating whether a UL subband or a DL subband is allocated.

[0072] (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 allocation of UL subbands and DL subbands for SBFD.

[0073] (3.1) Operation Overview In the wireless communication system 10, a mechanism may be provided to explicitly notify a UE whether a UL subband or a DL subband is allocated to a frequency domain at a specified time (e.g., a symbol or a slot) when SBFD is applied.

[0074] Specifically, the following operations may be performed:

[0075] (Operational Example 1): Semi-static configuration of the link direction of the SBFD symbol and support of the corresponding UE functions. (Option 1-1): The parameter (tdd-UL-DL-ConfigurationDedicated) is reused or reinterpreted to indicate the link direction of the SBFD symbol.

[0076] - (Option 1-2): A new RRC parameter setting is introduced to indicate the link direction of the SBFD symbol.

[0077] (Operational example 2): Dynamic indication of the link direction of the SBFD symbol, processing timeline and support for corresponding UE functions. (Option 2-1): The dynamic SFI of DCI format 2_0 is reused or reinterpreted to indicate the link direction of the SBFD symbol.

[0078] - (Option 2-2): A new dynamic display is introduced to indicate the link direction of the SBFD symbol.

[0079] (Operation Example 3): Both semi-static setting and dynamic display of the link direction of the SBFD symbol are supported, enabled or configured.

[0080] In this case, for SBFD symbols that are not indicated as "D" (downstream) or "U" (upstream) by the semi-static link direction setting, the dynamic link direction indication, such as by the DCI, may override the semi-static link direction indication.

[0081] Alternatively, for SBFD symbols that are not indicated as "D" (downstream) or "U" (upstream) by the semi-static link direction setting, a dynamic link direction indication, such as by a DCI, may or may not be able to override the semi-static link direction indication.

[0082] (3.2) Operation Example 1 (3.2.1) Option 1-1 Fig. 5 shows an example sequence of SBFD configuration related to Operation Example 1 (Option 1-1). As shown in Fig. 5, the UE may receive the tdd-UL-DL-ConfigurationDedicated included in the ServingCellConfig and configure the UL and DL to which SBFD is applied based on the content of the received tdd-UL-DL-ConfigurationDedicated. The UE may perform transmission and reception via the configured UL / DL.

[0083] The UE may support semi-static configuration of the link direction of SBFD symbols and corresponding UE capabilities. Specifically, the existing parameter tdd-UL-DL-ConfigurationDedicated may be reused or reinterpreted to indicate the link direction (UL or DL) of the SBFD symbols.

[0084] In the existing 3GPP specification, the tdd-UL-DL-ConfigurationDedicated may only override the Flexible symbols set by the tdd-UL-DL-ConfigurationCommon. Flexible time-resource (F) is the radio resource (time resource and / or frequency resource) available for either DL or UL.

[0085] For SBFD symbols configured as DL by tdd-UL-DL-ConfigurationCommon, tdd-UL-DL-ConfigurationDedicated may indicate DL only. For SBFD symbols configured as Flexible by tdd-UL-DL-ConfigurationCommon, the UE may operate as follows:

[0086] The UE may receive DL channels / signals in DL subbands (or DL ​​usable Physical Resource Blocks (PRBs)) of an SBFD symbol if the tdd-UL-DL-ConfigurationDedicated indicates that symbol as DL.

[0087] The UE may transmit UL channels / signals in UL sub-bands (or PRBs that can be used as UL) of an SBFD symbol if the tdd-UL-DL-ConfigurationDedicated indicates this symbol as UL.

[0088] The UE may receive DL channels / signals in DL subbands (or PRBs usable as DL) or transmit UL channels / signals in UL subbands (or PRBs usable as UL) of an SBFD symbol if the tdd-UL-DL-ConfigurationDedicated indicates that symbol as Flexible.

[0089] Whether the UE transmits or receives may depend on a dynamic instruction from the network (e.g., Operation Example 2) or on configured / scheduled transmission / reception and collision handling. As a variation, in the case of Flexible, only configured transmission / reception (based on collision handling) or scheduled transmission / reception with a specific scheduling offset (DCI indicating that scheduling was received well before the symbol in question) may be allowed.

[0090] For SBFD symbols configured as DL by tdd-UL-DL-ConfigurationCommon, the UE may operate as follows:

[0091] (Alt-a): (The indication by tdd-UL-DL-ConfigurationDedicated does not indicate the link direction of the SBFD symbol) The UE may receive DL channels / signals in the DL subband (or PRB usable as DL) or transmit UL channels / signals in the UL subband (or PRB usable as UL) in the SBFD symbol.

[0092] In addition, whether the UE transmits or receives may depend on dynamic instructions from the network (e.g., Operation Example 2) or configured / scheduled transmission / reception and collision handling (which may include variations as described above).

[0093] (Alt-b): Relaxes the previous restriction of tdd-UL-DL-ConfigurationDedicated to override the DL symbol set by tdd-UL-DL-ConfigurationCommon (if the symbol is an SBFD symbol).

[0094] For example, tdd-UL-DL-ConfigurationDedicated may indicate the DL symbol configured by tdd-UL-DL-ConfigurationCommon as DL or UL (or Flexible) if the DL symbol is configured as an SBFD symbol. This relaxed restriction allows for reuse of the UE behavior described above for SBFD Flexible symbols.

[0095] Whether or not to reinterpret the tdd-UL-DL-ConfigurationDedicated for link direction indication of SBFD symbols may be defined by 3GPP specifications, e.g., reinterpretation may be enabled by the gNB (e.g., an RRC parameter to enable / disable reinterpretation).

[0096] Whether to reinterpret tdd-UL-DL-ConfigurationDedicated may be determined based on whether explicit setting of link direction indication is enabled (e.g., option 1-2) and / or whether dynamic indication of link direction indication is enabled (e.g., operation example 2).

[0097] For example, if explicit configuration of link direction indication is enabled, the UE may not reinterpret the tdd-UL-DL-ConfigurationDedicated for link direction indication of SBFD symbols, otherwise the UE may reinterpret the tdd-UL-DL-ConfigurationDedicated for link direction indication of SBFD symbols.

[0098] Also, if dynamic indication of link direction indication is enabled / configured, the UE may not reinterpret tdd-UL-DL-ConfigurationDedicated for link direction indication in SBFD symbols, otherwise the UE may reinterpret tdd-UL-DL-ConfigurationDedicated for link direction indication in SBFD symbols.

[0099] The UE capability to reinterpret the tdd-UL-DL-ConfigurationDedicated parameter for link direction indication in SBFD symbols may be defined as follows:

[0100] New UE capability and reporting signaling (and RRC configuration) may be defined regarding whether the UE supports reinterpreting tdd-UL-DL-ConfigurationDedicated for link direction indication in SBFD symbols.

[0101] If the UE does not report this capability, the link direction of the SBFD symbol may depend on the configured / scheduled transmission / reception and collision handling, or the capability may be defined as a basic capability for SBFD operation (i.e., support for dynamic indication of link direction and / or support for SBFD operation without the need for explicit indication of link direction in the SBFD symbol may be a more advanced capability).

[0102] (3.2.2) Option 1-2 Figure 6 shows an example of the SBFD configuration sequence related to operation example 1 (option 1-2). As shown in Figure 6, the UE may receive new RRC parameters indicating the link direction of the SBFD symbol, and may configure UL and DL to which SBFD is applied based on the content of the received parameters. The UE may perform transmission and reception via the configured UL / DL.

[0103] In this option, a new RRC parameter may be introduced to indicate the link direction of SBFD symbols. As described in Option 1-1, in the existing 3GPP specification, tdd-UL-DL-ConfigurationDedicated can only override Flexible symbols configured by tdd-UL-DL-ConfigurationCommon. To indicate the link direction of SBFD DL symbols, relaxation of the current restriction may be required (e.g., Alt-b in Option 1-1).

[0104] In the existing 3GPP specification, tdd-UL-DL-ConfigurationDedicated can indicate a slot as "allDownlink", "allUplink", or "first DL symbol and last UL symbol, remaining intermediate symbols (if any)". This means that the DL and UL usage in SBFD slots is not flexible enough to accommodate dynamic DL and UL traffic.

[0105] The Reference SCS for setting the link direction of the SBFD symbol may be any of the following:

[0106] - (Opt 1): The same Reference SCS as that specifying the SBFD subband time domain position or the SCS indicated by referenceSubcarrierSpacing in tdd-UL-DL-ConfigurationCommon. - (Opt 2): The same SCS as the Reference SCS configured for the SFI indication of the serving cell. - (Opt 3): The Reference SCS is explicitly configured for link direction configuration. - (Opt 4): Predefined by 3GPP specifications (e.g., fixed to one of 15 / 30 / 60 / 120 / 480 / 960 kHz SCS). The periodicity of the link direction indication of the SBFD symbol may be one of the following:

[0107] (Alt-1): Equal to the periodicity of the SBFD subband time position indication. (Alt-2): Integer multiple of the periodicity of the SBFD subband time position indication. The integer value may be configured by the gNB or predefined by 3GPP specifications (default value may be used). Candidate values ​​for the integer value may be natural numbers such as 1, 2, 4, 5, 8, 10, 12, 15, 16, 18, 20, etc., and may be predefined by 3GPP specifications. As a variation, the UE may assume the periodicity of the link direction indication divided by 20 ms.

[0108] (Alt-3): A fixed value predefined by configuration or specification, e.g., 5 / 10 / 20 / 40 / 80 / 100 milliseconds.

[0109] The details / content of the link direction indication may be any of the following:

[0110] (Opt-a): A bitmap is indicated for the SBFD symbols within the link direction indication period, and one bit is assigned to each SBFD symbol within that period.

[0111] The candidate values ​​for each bit may be {D, U} or {D, U, F}. As a variation, the bitmap may be shown only for SBFD symbols configured as DL by tdd-UL-DL-ConfigurationCommon. For SBFD symbols configured as Flexible by tdd-UL-DL-ConfigurationCommon, option 1 may apply (i.e., the existing tdd-UL-DL-ConfigurationDedicated).

[0112] (Opt-a'): A bitmap is shown for all symbols within the link direction indication period, and one bit is assigned to each symbol within the period.

[0113] The possible values ​​of each bit indication may be {D, U}, {D, U, F}, or {D, U, F, non-SBFD}. As a variation, in the case of a non-SBFD symbol, the UE may expect "non-SBFD" to be indicated and may ignore the corresponding bit indication. Also, some restrictions may be predefined. For example, the D and U transitions may be limited in number (e.g., "1") within a set of consecutive SBFD symbols.

[0114] (Opt-b): A set of {slot index, SBFD-direction-pattern} is set.

[0115] The SBFD direction pattern may be a bitmap where each bit is mapped one to a (SBFD) symbol in the slot (e.g., the content of the bitmap may be similar to Opt-a / a'), or a value of "all-downlink" (indicating the DL direction of all SBFD symbols in the slot) or "all-uplink" (indicating the UL direction of all SBFD symbols in the slot), or "number of SBFD symbols in DL direction, number of SBFD symbols in UL direction".

[0116] (Opt-c): A set of {slot index, SBFD direction pattern index} is set.

[0117] The list of SBFD direction patterns may be set or defined by 3GPP specifications. For example, it may be a list / table with each row / element indicating the SBFD direction pattern of a slot. An SBFD direction pattern index may correspond to one SBFD direction pattern. The contents of the SBFD direction pattern may be the same as those of Opt-b described above.

[0118] (Opt-d): The start symbol of UL is set for each set of consecutive SBFD symbols (i.e., DL reception can be assumed before the symbol).

[0119] The UE's action based on the link direction indication may be one of the following:

[0120] If the link direction indication indicates DL for the SBFD symbol, the UE may receive DL channels / signals in the DL subbands (or DL ​​enabled PRBs) of the SBFD symbol.

[0121] If the link direction indication indicates UL for the SBFD symbol, the UE may transmit UL channels / signals in the UL sub-bands (or UL enabled PRBs) of the SBFD symbol.

[0122] As a variation, if the link direction indication indicates Flexible for an SBFD symbol, the UE may receive DL channels / signals in the DL subband (or PRB usable as DL) of the SBFD symbol or transmit UL channels / signals in the UL subband (or PRB usable as UL).

[0123] Whether the UE transmits or receives may depend on a dynamic instruction from the network (e.g., Operation Example 2) or on configured / scheduled transmission / reception and collision handling. As a variation, in the case of Flexible, only configured transmission / reception (based on collision handling) or scheduled transmission / reception with a specific scheduling offset (DCI indicating that scheduling was received well before the symbol in question) may be allowed.

[0124] The UE capability to determine the link direction of the SBFD symbols based on the semi-static link direction configuration may be defined as follows:

[0125] - New UE capability and reporting signaling (and RRC configuration) may be defined per UE / FR / FC (Frequency Channel) regarding whether the UE supports semi-static configuration of the link direction indication of SBFD symbols.

[0126] If the UE does not report such capability, the link direction of the SBFD symbol may depend on the configured / scheduled transmission / reception and collision handling, or may depend on dynamic indication (e.g., operation example 2) if the UE reports the corresponding capability. Alternatively, the capability may be defined as a basic capability for SBFD operation (i.e., support for dynamic indication of link direction and / or support for SBFD operation without requiring explicit indication of link direction in the SBFD symbol may be a more advanced capability).

[0127] As a variation, for non-SBFD symbols, the UE may assume that the new RRC parameters can indicate D / U / F for non-SBFD symbols. For example, for non-SBFD symbols indicated as Flexible by tdd-UL-DL-ConfigurationCommon, if the new RRC parameters indicate D / U, the non-SBFD symbols may be overridden as non-SBFD DL / UL symbols. Also, if new RRC parameters are configured at the same time, the UE may not expect tdd-UL-DL-ConfigurationDedicated to be configured. The UE may not apply the configuration of tdd-UL-DL-ConfigurationDedicated if new RRC parameters are configured at the same time.

[0128] (3.3) Operation Example 2 (3.3.1) Option 2-1 Fig. 7 shows an example sequence of SBFD configuration related to operation example 2 (option 2-1). As shown in Fig. 7, the UE may receive the dynamic SFI included in the DCI (DCI format 2_0) and configure the UL and DL to which SBFD is applied based on the content of the received dynamic SFI. The UE may perform transmission and reception via the configured UL / DL.

[0129] In this operation example, dynamic indication of link direction in SBFD symbols may be supported, and in this option, the dynamic SFI in DCI format 2_0 may be reused or reinterpreted to indicate the link direction of SBFD symbols.

[0130] In the existing 3GPP specifications, the dynamic SFI may only override Flexible symbols configured by tdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationDedicated. For SBFD symbols configured as DL by tdd-UL-DL-ConfigurationCommon, the SFI may indicate only that DL. For SBFD symbols configured as Flexible by tdd-UL-DL-ConfigurationCommon, the UE may behave as follows:

[0131] If the dynamic SFI in DCI format 2_0 indicates that the symbol is DL, the UE may receive DL channels / signals in the DL subbands (or PRBs that can be used as DL) of the SBFD symbol.

[0132] If the symbol is indicated as UL by the dynamic SFI of DCI format 2_0, the UE may transmit an UL channel / signal in the UL subband (or PRB that can be used as UL) of the SBFD symbol.

[0133] If the symbol is indicated as Flexible by the dynamic SFI of DCI format 2_0, the UE may receive DL channels / signals in DL subbands (or PRBs usable as DL) or transmit UL channels / signals in UL subbands (or PRBs usable as UL) of the SBFD symbol.

[0134] Note that whether a UE transmits or receives may depend on the configured / scheduled transmission / reception and collision handling.

[0135] For SBFD symbols configured as DL by tdd-UL-DL-ConfigurationCommon, the UE may operate as follows:

[0136] (Alt-a): (The dynamic SFI of DCI format 2_0 does not indicate the direction of the SBFD symbol.) The UE may receive DL channels / signals in the DL subbands (or PRBs usable as DL) of the SBFD symbol, or may transmit UL channels / signals in the UL subbands (or PRBs usable as UL).

[0137] Note that whether a UE transmits or receives may depend on the configured / scheduled transmission / reception and collision handling, and a variation may be to only allow configured transmission / reception (based on collision handling) or scheduled transmission / reception with a specific scheduling offset (DCI indicating that scheduling was received well before the symbol in question).

[0138] (Alt-b): Relaxes the previous restriction on dynamic SFIs in DCI format 2_0 overriding DL symbols set by tdd-UL-DL-ConfigurationCommon.

[0139] For example, a dynamic SFI in DCI format 2_0 may indicate a DL symbol configured by tdd-UL-DL-ConfigurationCommon as DL or UL (or Flexible) if the symbol is an SBFD symbol. This relaxed restriction allows the UE behavior similar to that described above to be reused for SBFD Flexible symbols.

[0140] Whether or not to reinterpret the dynamic SFI of DCI format 2_0 for the link direction indication of the SBFD symbol may be defined by the 3GPP specifications, such as reinterpreting by default, or reinterpretation may be enabled by the gNB (e.g., an RRC parameter to enable / disable reinterpretation).

[0141] Whether or not to reinterpret the dynamic SFI of DCI format 2_0 may be determined based on whether explicit setting of link direction indication is enabled (e.g., option 2-2) and / or whether or not dynamic indication of link direction indication is enabled (e.g., operation example 2).

[0142] For example, if explicit configuration of link direction indication is enabled, the UE may not reinterpret the dynamic SFI of DCI format 2_0 for the link direction indication of the SBFD symbol, otherwise the UE may reinterpret the dynamic SFI of DCI format 2_0 for the link direction indication of the SBFD symbol.

[0143] Alternatively, some restrictions may be predefined. For example, the dynamic SFI indicating the link direction of the SBFD symbol must be received well before the SBFD symbol. For example, this may be M symbols, N slots, or L milliseconds. The required offset (M / N / L) may be reported as a UE capability.

[0144] Regarding whether the UE supports reinterpreting the dynamic SFI of DCI format 2_0 for the link direction indication of the SBFD symbol, new UE capability and reporting signaling (and RRC configuration) may be defined for each UE / FR / FC (Frequency Channel).

[0145] If the UE does not report this capability, the link direction of the SBFD symbol may depend on the configured / scheduled transmission / reception and collision handling, or the capability may be defined as a basic capability for SBFD operation (i.e., support for dynamic indication of link direction and / or support for SBFD operation without the need for explicit indication of link direction in the SBFD symbol may be a more advanced capability).

[0146] (3.3.2) Option 2-2 Fig. 8 shows an example sequence of SBFD configuration according to operation example 2 (option 2-2). As shown in Fig. 8, the UE may receive DCI according to a new DCI format indicating the link direction of the SBFD symbol, and may configure UL and DL to which SBFD is applied based on the content of the received DCI. The UE may perform transmission and reception via the configured UL / DL.

[0147] In this option, a new dynamic indication may be introduced to indicate the link direction of the SBFD symbol. As described in Option 2-1, in the existing 3GPP specification, the dynamic SFI can only override the Flexible symbol set by tdd-UL-DL-ConfigurationCommon. To indicate the link direction of the SBFD DL symbol, it may be necessary to relax the current restriction (e.g., Alt-b in Option 2-1).

[0148] DCI format 2_0 may not be suitable for indicating the direction of SBFD symbols, since it is a DCI common to a group and the direction may be UE specific considering UE traffic.

[0149] The signaling of the dynamic link direction indication may be either:

[0150] Dynamic indication, for example, DCI (existing or new DCI format, UE-specific DCI or group-common DCI, existing RNTI or new RNTI) and / or MAC CE may be used.

[0151] Existing DCI formats are UE-specific DCI formats (e.g., DCI formats 0_1 / 0_2 / 0_3 / 1_1 / 1_2 / 1_3) or group-common or multicast DCI formats (e.g., DCI 2_0 / 2_1 / 2_2 / 2_3 / 2_4 / 2_5 / 2_6 / 2_7 / 4_0 / 4_1 / 4_2 / 5_0).

[0152] (Alt-1): Use a new DCI field for direction indication in the existing DCI format, regardless of whether DL-SCH (Shared Channel) and / or UL-SCH are scheduled.

[0153] Whether or not the new DCI field is included in the DCI format may be configured by the RRC. For example, if the new parameter SBFD-link-direction is set to "enabled" for the DCI format, the new DCI field may be included in the DCI format. In other cases, the new DCI field may not be included in the DCI format.

[0154] (Alt-2): Reuse / reinterpret existing DCI fields in existing DCI format, regardless of whether DL-SCH and / or UL-SCH are scheduled.

[0155] Whether a specific existing DCI field is reinterpreted to indicate the link direction of the SBFD symbol may be based on a flag. The flag may be indicated by a new DCI field (e.g., the value of the specific DCI field may be used as the flag). As a variation, if the UE determines that the DCI indicates the link direction (e.g., based on the above-mentioned flag) and is in a UE-specific DCI format (e.g., DCI format 0_1 / 0_2 / 0_3 / 1_1 / 1_2 / 1_3), it may assume that no PDSCH / PUSCH is scheduled by the DCI.

[0156] If the dynamic link direction indication uses the new DCI format, the DCI monitor may either:

[0157] (Alt-a): Monitor DCI periodically. The monitoring period may be explicitly set, or may be the same as the monitoring period of DCI 2_0.

[0158] (Alt-b): Aperiodic method, for example, the UE may monitor DCI based on existing monitoring configuration (e.g., search space and CORESET configuration).

[0159] The Reference SCS for setting the link direction of the SBFD symbol may be any of the following:

[0160] - (Opt 1): The same Reference SCS as that specifying the SBFD subband time domain position or the SCS indicated by referenceSubcarrierSpacing in tdd-UL-DL-ConfigurationCommon. - (Opt 2): The same SCS as the Reference SCS set for the SFI indication of the serving cell. - (Opt 3): The Reference SCS is explicitly set for link direction setting. - (Opt 4): Predefined by 3GPP specifications (e.g., fixed to one of 15 / 30 / 60 / 120 / 480 / 960 kHz SCS). The details / contents of the link direction indication may be one of the following:

[0161] (Opt-a): A bitmap is indicated for the SBFD symbols within the link direction indication period, and one bit is assigned to each SBFD symbol within that period.

[0162] The candidate values ​​for each bit indication may be {D, U}, ({D, U, F} or {D, U, F, non-SBFD}. The "duration / period" may be defined by the 3GPP specification, may be explicitly set, or may be equal to the DCI monitoring period (in case of periodic DCI for link direction indication).

[0163] The start position of the bitmap application may be defined by the specification, for example, the first slot (including the SBFD symbol) or the first (SBFD) symbol of the (current or next) DCI monitoring period.

[0164] Alternatively, the start position of the bitmap application may be the first slot (including the SBFD symbol) or the first (SBFD) symbol, which is a T1 slot / symbol after the slot or end / start symbol of the DCI (which may be a PDSCH including MAC CE).

[0165] Alternatively, the start position of the bitmap application may be the first slot (including the SBFD symbol) or the first (SBFD) symbol, which is the T2 slot / symbol after the slot or end / start symbol of the HARQ (Hybrid automatic repeat request)-ACK PUCCH corresponding to the DCI (which may be a PDSCH including MAC CE).

[0166] Here, the value of T1 / T2 may be predefined by a 3GPP specification or may be configured by the gNB (or indicated using DCI / MAC CE). When configured by the gNB or indicated by DCI / MAC CE, the minimum value of T1 / T2 may be defined by a 3GPP specification or may depend on the UE capabilities (which may be reported to the network in advance).

[0167] (Opt-b): May indicate a set of {slot index, bitmap} where each bit in the bitmap is mapped one by one to a (SBFD) symbol in the slot.

[0168] (Opt-c): A set of {slot index, SBFD direction pattern index} may be set.

[0169] The list of SBFD direction patterns may be predefined by 3GPP specifications or configured by the gNB. For example, it may be a list / table with each row / element indicating an SBFD direction pattern for a slot. An SBFD direction pattern index may correspond to one SBFD direction pattern.

[0170] The SBFD direction pattern may be a bitmap in which each bit is mapped one by one to a (SBFD) symbol in a slot (e.g., the content of the bitmap may be the same as that of Opt-a), or the value of "all-downlink" (indicating the DL direction of all SBFD symbols in a slot) or "all-uplink" (indicating the UL direction of all SBFD symbols in a slot), or "number of SBFD symbols in DL direction, number of SBFD symbols in UL direction".

[0171] The dynamic link direction indication may be applied only once, or periodically until another link direction indication is detected, or periodically within K1 slots / subframes / ms, or K times, or periodically within a DCI monitoring period.

[0172] The UE's action based on the link direction indication may be one of the following:

[0173] If the link direction indication indicates DL for the SBFD symbol, the UE may receive DL channels / signals in the DL subbands (or DL ​​enabled PRBs) of the SBFD symbol.

[0174] If the link direction indication indicates UL for the SBFD symbol, the UE may transmit UL channels / signals in the UL sub-bands (or UL enabled PRBs) of the SBFD symbol.

[0175] As a variation, if the link direction indication indicates Flexible for an SBFD symbol, the UE may receive DL channels / signals in the DL subband (or PRB usable as DL) of the SBFD symbol or transmit UL channels / signals in the UL subband (or PRB usable as UL).

[0176] Note that whether a UE transmits or receives may depend on the configured / scheduled transmission / reception and collision handling, and a variation may be to only allow configured transmission / reception (based on collision handling) or scheduled transmission / reception with a specific scheduling offset (DCI indicating that scheduling was received well before the symbol in question).

[0177] Alternatively, some restrictions may be predefined. For example, the dynamic SFI indicating the link direction of the SBFD symbol must be received well before the SBFD symbol. For example, this may be M symbols, N slots, or L milliseconds. The required offset (M / N / L) may be reported as a UE capability.

[0178] Regarding whether the UE supports dynamic indication of the link direction of the SBFD symbol, new UE capability and reporting signaling (and RRC configuration) may be defined for each UE / FR / FC (Frequency Channel).

[0179] If the UE does not report this capability, the link direction of the SBFD symbol may depend on the configured / scheduled transmission / reception and collision handling, or the capability may be defined as a basic capability for SBFD operation (i.e., support for dynamic indication of link direction and / or support for SBFD operation without the need for explicit indication of link direction in the SBFD symbol may be a more advanced capability).

[0180] (3.4) Operational Example 3 In this operational example, both semi-static setting and dynamic indication of the link direction of the SBFD symbol may be supported, enabled, or set.

[0181] If both semi-static and dynamic link direction indication for SBFD symbols are supported, the dynamic link direction indication may override the link direction for SBFD symbols that are not indicated as "D" or "U" direction by the semi-static link direction setting, i.e., the dynamic link indication (dynamic indication) may take precedence.

[0182] For example, for the SBFD symbol, if the semi-static setting indicates "F" (i.e., does not indicate the "D" or "U" orientation of the SBFD symbol), it may be overridden as "D" or "U" by the dynamic indication.

[0183] For SBFD symbols that are not indicated as a "D" or "U" direction by the semi-static configuration, the link direction may or may not be overridden by the dynamic indication. For example, for an SBFD symbol, if the semi-static configuration indicates "D" (indicating reception in the DL subband of the SBFD symbol), it may be overridden as "U" (or "F") by the dynamic indication. Also, for an SBFD symbol, if the semi-static configuration indicates "U" (indicating transmission in the UL subband of the SBFD symbol), it may be overridden as "D" (or "F") by the dynamic indication.

[0184] Alternatively, for an SBFD symbol, if the semi-static configuration indicates "D" (indicating reception on the DL subband of the SBFD symbol), the UE may not expect a dynamic indication of "U" (or "F"). Also, for an SBFD symbol, if the semi-static configuration indicates "U" (indicating transmission on the UL subband of the SBFD symbol), the UE may not expect a dynamic indication of "D" (or "F").

[0185] According to the above-described operational example, semi-static configuration and / or dynamic indication of the link direction of the SBFD symbol is provided to the UE, so that the UE can know in advance whether a UL subband or a DL subband is assigned to a region in the frequency direction at a specified time (e.g., symbol or slot) when SBFD is applied.

[0186] Therefore, the UE can flexibly respond to changes, such as when the allocation of UL subbands and DL subbands is dynamically or frequently changed within a specified time (e.g., symbol or slot), etc. This makes it possible to dynamically and frequently change the subbands to which SBFD is applied in response to demand, etc., which can contribute to improving the capacity of the wireless communication system 10 and providing timely service in response to communication demands.

[0187] (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.

[0188] 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 auxiliary band, spare band, etc. Furthermore, XDD / SBFD may be a provisional name, and may be called by other similar terms as described above.

[0189] 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.

[0190] Furthermore, specific, dedicated, UE-specific, and UE-dedicated may be interchangeable. Similarly, common, shared, group-common, UE-common, and UE-shared may be interchangeable.

[0191] 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.

[0192] 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.

[0193] 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.

[0194] 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 9 is a diagram showing an example of the hardware configuration of the devices. As shown in Figure 9, 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.

[0195] 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.

[0196] 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.

[0197] 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.

[0198] 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.

[0199] 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.

[0200] 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.

[0201] 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.

[0202] 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.

[0203] 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).

[0204] 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).

[0205] 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.

[0206] 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.

[0207] 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.

[0208] 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.

[0209] 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.

[0210] 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.

[0211] 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.

[0212] 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. The output information may be deleted. The input information may be transmitted to another device.

[0213] 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).

[0214] 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).

[0215] 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.

[0216] 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.

[0217] 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.

[0218] 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.

[0219] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0220] 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.

[0221] 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.

[0222] 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.

[0223] 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)).

[0224] 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.

[0225] 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.

[0226] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0227] 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.

[0228] 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.

[0229] 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).

[0230] 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.

[0231] 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.

[0232] 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.

[0233] 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.

[0234] 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.

[0235] 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.

[0236] 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.

[0237] 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.

[0238] 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.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] 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.

[0243] 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.

[0244] 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.

[0245] 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.

[0246] 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.

[0247] 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.

[0248] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0249] 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.

[0250] 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.

[0251] The reference signal may also be abbreviated as Reference Signal (RS) and may be called a pilot depending on the applicable standard.

[0252] 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."

[0253] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0254] 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.

[0255] 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.

[0256] 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.

[0257] 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.

[0258] 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."

[0259] 10 shows an example of the configuration of a vehicle 2001. As shown in Fig. 10, 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.

[0260] 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).

[0261] 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.

[0262] 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.

[0263] 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.

[0264] 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.

[0265] 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.

[0266] 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.

[0267] 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.

[0268] 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; a receiving unit that receives a message including a parameter of an upper layer indicating which of the uplink subbands or the downlink subbands is allocated; and a control unit that controls uplink transmission in the uplink subband or downlink reception in the downlink subband based on the parameter.

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-overlappingly in the frequency direction within a specified time based on time division duplex; a receiving unit that receives downlink control information indicating which of the uplink subbands or the downlink subbands is assigned; and a control unit that controls uplink transmission in the uplink subbands or downlink reception in the downlink subbands based on the downlink control information.

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; a receiving unit that receives a message including upper layer parameters indicating which of the uplink subbands or the downlink subbands is allocated, and downlink control information indicating which of the uplink subbands or the downlink subbands is allocated; and a control unit that controls uplink transmission in the uplink subbands or downlink reception in the downlink subbands based on the downlink control information when the parameters do not indicate whether the uplink subbands or the downlink subbands are allocated.

4. A radio base station 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-overlappingly in the frequency direction within a specified time based on time division duplex; and a transmission unit that transmits a message including upper layer parameters indicating which of the uplink subbands or the downlink subbands is assigned.

5. A radio base station 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 transmission unit that transmits downlink control information indicating which of the uplink subbands or the downlink subbands is assigned.

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