Terminal and wireless communication method

Abstract

Provided are a terminal and a wireless communication method with which A-SRS can be more efficiently transmitted while SBFD is applied. The terminal transmits and receives a radio signal in accordance with a sub-band full-duplex communication system in which uplink sub-bands and downlink sub-bands are allocated non-overlappingly in the frequency direction within a specified time period based on time division duplex. The terminal assumes that an aperiodic sounding reference signal can be transmitted in the uplink sub-bands and / or the downlink sub-bands.

Description

Terminal and wireless communication method

[0001] The present disclosure relates to a terminal and a wireless communication method that supports SBFD.

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

[0003] For example, in 3GPP Release 19, an extension of the duplex method is being considered (Non-Patent Document 1). Specifically, regarding Sub-Band non-overlapping Full Duplex (SBFD), which is a duplex method that enables simultaneous use of a downlink (DL) and an uplink (UL) within a carrier in a time division duplex (TDD) band, transmission and reception across SBFD symbols and non-SBFD symbols is being considered.

[0004] 3GPP has proposed several options for transmitting physical layer channels such as a Physical Uplink Shared Channel (PUSCH) using such SBFD symbols and non-SBFD symbols (Non-Patent Document 2). For example, an option has been agreed upon in which UL and DL Physical Resource Blocks (PRBs) available as UL subbands and DL subbands (which may also be referred to as SBFD subbands), specifically, an UL usable PRB, is determined based on the position where an active bandwidth portion (active UL BWP) in an SBFD symbol intersects with the UL subband, and a DL usable PRB is determined based on the active bandwidth portion (active DL BWP) in an SBFD symbol and the DL subband, and an option in which the UL usable PRB and the DL usable PRB are explicitly set in the active UL BWP and the active DL BWP.

[0005] In addition, 3GPP Release-17 specifies an enhanced sounding reference signal (SRS) (see Non-Patent Document 3). The SRS is a type of uplink reference signal used by a radio base station to measure uplink channel quality, reception timing, etc. The standard also specifies an A-SRS that is transmitted aperiodically from a terminal (User Equipment, UE).

[0006] When SBFD is applied, the count of slots in which A-SRS can be transmitted is based on only UL symbols and SBFD flexible symbols. Note that SBFD flexible symbols may refer to symbols indicated as Flexible (F) by tdd-UL-DL-ConfigurationCommon (and / or tdd-UL-DL-ConfigurationDedicated), and SBFD subbands may be configured in units of symbols.

[0007] "New WID: Evolution of NR duplex operation: Sub-band full duplex (SBFD)", RP-234035, 3GPP TSG RAN Meeting #102, 3GPP, December 2023 "Draft Report of 3GPP TSG RAN WG1 #116b v0.3.0", 3GPP, April 2024 3GPP TS 38.214 V17.9.0, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Physical layer procedures for data (Release 17)

[0008] Although the UL subbands in the DL symbols (time units) where SBFD is applied can also be used for UL transmission, according to the results of previous 3GPP studies and specifications, A-SRS cannot be triggered in the DL symbols where SBFD is applied, which leaves room for improvement in terms of efficiency.

[0009] Therefore, the following disclosure has been made in consideration of such circumstances, and aims to provide a terminal and a wireless communication method that can achieve more efficient A-SRS transmission while applying SBFD.

[0010] 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, and a control unit (control unit 270) that assumes that a non-periodic sounding reference signal can be transmitted in at least one of the uplink subbands and the downlink subbands.

[0011] FIG. 1 is a diagram showing an overall schematic configuration of a wireless communication system 10. FIG. 2 is a diagram showing an example configuration of a wireless frame, subframe, and slot used in the wireless communication system 10. FIG. 3 is a diagram showing an example configuration 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 configuration of a UL subband and a DL subband using SBFD. FIG. 6 is a diagram showing an example count of slots available for A-SRS transmission. FIG. 7 is a diagram showing an example hardware configuration of a gNB 100 and a UE 200. FIG. 8 is a diagram showing an example configuration of a vehicle 2001.

[0012] Hereinafter, embodiments will be described with reference to the drawings. Note that the same or similar reference numerals are used to designate the same functions or configurations, and descriptions thereof will be omitted as appropriate.

[0013] (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.

[0014] 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 .

[0015] 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."

[0016] 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.

[0017] 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.

[0018] 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.

[0019] The wireless communication system 10 may also support multiple frequency ranges (FR). Specifically, the wireless communication system 10 may support the following frequency ranges:

[0020] ・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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] If the 14-symbol / slot configuration is maintained, the larger (wider) the SCS, the shorter the symbol period (and slot period). The time direction may be referred to as the time domain, symbol period, symbol length, or symbol time. The frequency direction may be referred to as the frequency domain, resource block, subcarrier, or BWP (Bandwidth part).

[0027] 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.

[0028] 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.

[0029] 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).

[0030] 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.

[0031] 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).

[0032] 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).

[0033] 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.

[0034] On the other hand, in XDD / SBFD, gNB100 can configure specific frequency resources (e.g., subbands) as DL and other frequency resources as UL at a specified time T, such as a symbol, and instruct UE200 accordingly.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] (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.

[0039] 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.

[0040] It should be noted that Fig. 4 shows only the main functional blocks relevant to the description of the embodiment, and that the UE 200 (gNB 100) has other functional blocks (e.g., a power supply unit, etc.). Fig. 4 shows the functional block configuration of the UE 200, and for the hardware configuration, please refer to Fig. 8.

[0041] 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.

[0042] 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 duplexing. In this embodiment, the radio signal transceiver 210 may constitute a communication unit. Of course, the radio signal transceiver 210 may also support duplexing methods such as TDD and FDD (frequency division duplexing). The amplifier 220 is constituted by a PA (power amplifier) / LNA (low noise amplifier), etc. The amplifier 220 amplifies the signal output from the modem 230 to a predetermined power level. The amplifier 220 also amplifies the RF signal output from the radio signal transceiver 210.

[0043] 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).

[0044] The control signal and reference signal processor 240 performs processing related to various control signals transmitted and received by the UE 200 and processing related to various reference signals transmitted and received by the UE 200 .

[0045] 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.

[0046] The control signal and reference signal processor 240 performs processing using reference signals (RS) such as a Demodulation Reference Signal (DMRS) and a Phase Tracking Reference Signal (PTRS).

[0047] DMRS is a reference signal (pilot signal) known between the base station and the terminal for estimating the fading channel used for data demodulation, while PTRS is a terminal-specific reference signal for estimating phase noise, which is an issue in high frequency bands.

[0048] 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.

[0049] The channels include a control channel and a data channel. The control channel may include a physical downlink control channel (PDCCH), a physical uplink control channel (PUCCH), a random access channel (RACH, downlink control information (DCI) including a random access radio network temporary identifier (RA-RNTI)), a physical broadcast channel (PBCH), etc.

[0050] 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.

[0051] The control signal and reference signal processor 240 may transmit capability information of the UE 200 (UE Capability Information) to the network. In particular, in this embodiment, the control signal and reference signal processor 240 may transmit capability information related to SBFD. The capability information may include, for example, capabilities related to support of SBFD symbols and / or PUSCH transmission using SBFD symbols. The capability information may also include capabilities related to support of aperiodic sounding reference signals (A-SRS).

[0052] The encoding / decoding unit 250 performs data division / concatenation and channel coding / decoding for each predetermined communication destination (gNB 100 or another gNB).

[0053] 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.

[0054] The data transmitter / receiver 260 transmits and receives Protocol Data Units (PDUs) and Service Data Units (SDUs). Specifically, the data transmitter / receiver 260 assembles and disassembles PDUs / SDUs in multiple layers (such as the Medium Access Control layer (MAC), the Radio Link Control layer (RLC), and the Packet Data Convergence Protocol layer (PDCP)). The data transmitter / receiver 260 also performs data error correction and retransmission control based on Hybrid Automatic Repeat Request (Hybrid ARQ).

[0055] 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.

[0056] Specifically, the control unit 270 can determine the frequency resource of the PUSCH in a time unit to which the subband full duplex (SBFD) is applied, based on a frequency domain resource assignment (FDRA) and an offset of a resource block (RB). The FDRA may be referred to as a 3GPP frequency domain resource allocation, and may be interpreted as information indicating resource allocation in the frequency domain.

[0057] Furthermore, the time unit to which SBFD is applied may typically refer to an SBFD symbol, but is not necessarily limited to a symbol, and may also be a slot or minislot (or subslot).

[0058] The control unit 270 may assume that an aperiodic sounding reference signal (A-SRS) can be transmitted in at least one of the UL subband and the DL subband. The A-SRS may be interpreted as a type of reference signal transmitted aperiodically by the UE. The A-SRS may be used by the gNB 100 to measure uplink channel quality, reception timing, and the like. Furthermore, aperiodic may be interpreted as aperiodic, irregular, or the like.

[0059] The control unit 270 may assume that A-SRS can be transmitted in a time unit (e.g., SBFD symbol) to which SBFD is applied. Note that the time unit may be continuous or discontinuous. Furthermore, as described above, a unit other than a symbol may also be applied.

[0060] The control unit 270 may determine the slots used for transmitting the A-SRS based on a first specification or a second specification in which the target slots are expanded from the first specification. Specifically, the control unit 270 may determine the slots used for transmitting the A-SRS based on a specification (first specification) regarding the slot count in accordance with an existing 3GPP specification (e.g., Release-17), or based on a specification (second specification) regarding the slot count in a new 3GPP specification (e.g., Release-19) in which the target slots are expanded from the first specification (e.g., the target is expanded to slots corresponding to SBFD subbands or SBFD symbols).

[0061] Here, the control unit 270 may apply either the first rule or the second rule based on the position of the reference slot.

[0062] (3) Operation of the Wireless Communication System Next, a description will be given of the operation of the wireless communication system 10. Specifically, a description will be given of the operation related to the transmission of A-SRS when SBFD is applied.

[0063] (3.1) Assumptions and Issues Regarding SBFD, 3GPP has agreed on the term "DL / UL usable PRB," which means a Physical Resource Block (PRB) that can be used as either DL or UL. Specifically, a UL subband frequency resource in an active UL BWP is called a UL usable PRB, and a DL subband frequency resource in an active DL BWP is called a DL usable PRB.

[0064] 5 shows an example of the configuration of UL subbands and DL subbands according to SBFD. As shown in FIG. 5, UL subbands (UL usable PRBs) may be configured in a UL BWP, and DL subbands (DL usable PRBs) may be configured in a DL BWP.

[0065] When SBFD is applied, the count of slots in which A-SRS can be transmitted is based on only UL symbols and SBFD flexible symbols. Of course, the UL subband in the DL symbol (time unit) in which SBFD is applied can also be used for UL transmission.

[0066] However, if there is no extension to the specifications regarding the available slot count for triggering A-SRS, there is a problem that A-SRS cannot be triggered in the SBFD DL symbol.

[0067] In the following, "SBFD DL symbol" may refer to a symbol indicated as downlink by tdd-UL-DL-ConfigurationCommon (and / or tdd-UL-DL-ConfigurationDedicated), and the SBFD subband may be configured in units of symbols.

[0068] "SBFD flexible symbol" may mean a symbol indicated as Flexible (F) by tdd-UL-DL-ConfigurationCommon (and / or tdd-UL-DL-ConfigurationDedicated), and SBFD subbands may be configured on a symbol-by-symbol basis.

[0069] A "non-SBFD symbol" may refer to a symbol for which no SBFD subband is configured.

[0070] (3.2) Operation Overview With regard to A-SRS transmission when SBFD is applied, the following operations may be performed.

[0071] (Operation Example 1): The SBFD symbol is considered available in counting available slots for A-SRS transmission.

[0072] (Operation Example 2): Whether to apply the extended available slot counting rule or the conventional available slot counting rule to trigger A-SRS is determined by the following method.

[0073] (Alt 1): Predefined by the specification; (Alt 2): Configured by RRC; (Alt 3): Explicitly or implicitly determined based on the DCI that triggers the A-SRS resource set; (Alt 4): Implicitly determined based on the SRS frequency resource; (Alt 5): Implicitly determined based on the reference slot (i.e., reference slot n+k used as the starting point for counting available slots). Figure 6 shows an example of counting available slots for A-SRS transmission. As shown in Figure 6, A-SRS can also be triggered by DCI. In Figure 6, the first available slot (SRS#1) is triggered at slot N+4, and the second available slot (SRS#2) is triggered at slot N+9. This slot counting may also be applied in SBFD.

[0074] (3.3) Operational Example 1 In this operational example, the SBFD symbol is considered available in counting available slots for A-SRS transmission.

[0075] If the UE is provided with time and frequency domain locations in the SBFD subbands, if one or more SRS resource sets are configured in all configured BWPs within a component carrier, or if at least one resource set is configured with a multi-valued availableSlotOffsetList parameter, one of the following options may be assumed:

[0076] (Option 1): The usable slots are those that satisfy the UL symbols, flexible symbols or SBFD (DL and / or flexible) symbols for the time domain positions of all SRS resources in the resource set, and satisfy the UE capabilities regarding the minimum timing requirements between the trigger of the PDCCH and all SRS resources in the resource set.

[0077] (Option 2): The usable slots are those that satisfy UL symbols, flexible symbols, or SBFD (DL and / or flexible) symbols for the time domain positions of all SRS resources in the resource set, where the time domain position of each SRS resource in the resource set is within the range of only UL or non-SBFD flexible symbols, or only SBFD symbols, and satisfy the UE capability for minimum timing requirements between the trigger of the PDCCH and all SRS resources in the resource set.

[0078] (Option 3): The available slots are those that fill UL symbols or non-SBFD flexible symbols for the time domain positions of all SRS resources in the resource set, or those that fill SBFD symbols (DL and / or flexible) symbols for the time domain positions of all SRS resources in the resource set, and that satisfy the UE capabilities regarding the minimum timing requirement between the trigger of the PDCCH and all SRS resources in the resource set.

[0079] (Option 4): The available slots are those that satisfy the UL or flexible symbols for the time domain positions of all SRS resources in the resource set, or those that satisfy the SBFD (DL) symbols for the time domain positions of all SRS resources in the resource set, and satisfy the UE capabilities regarding the minimum timing requirement between the trigger of the PDCCH and all SRS resources in the resource set.

[0080] (Option 5): The usable slots are those that satisfy the SBFD symbols for the time domain positions of all SRS resources in the resource set and satisfy the UE capabilities regarding the minimum timing requirements between the trigger of the PDCCH and all SRS resources in the resource set.

[0081] (Option 6): A usable slot is a slot that satisfies the following conditions: there is a UL symbol, a flexible symbol, or an SBFD (DL and / or flexible) symbol at the time domain position of all SRS resources in the resource set, the SRS frequency resource does not overlap with a UL usable PRB outside the RB of the SRS resource within the SBFD (DL and / or flexible) symbol (or if overlapping with an SBFD symbol), and the UE capability regarding the minimum timing requirement between the trigger of the PDCCH and all SRS resources in the resource set is met.

[0082] (Option 7): An available slot is a slot where there is a UL symbol, a flexible symbol, or an SBFD (DL and / or flexible) symbol for the time domain location for all SRS resources in the resource set, the time domain location for each SRS resource in the resource set is within the UL symbol, only the non-SBFD flexible symbol, or only the SBFD symbol, and if an SRS frequency resource exists, does not overlap with an RB outer UL available PRB for SRS resources within the SBFD symbol, and satisfies the UE capability for minimum timing requirements between triggering the PDCCH and all SRS resources in the resource set.

[0083] (Option 8): Usable slots are those that satisfy the presence of UL or non-SBFD flexible symbols for the time domain locations of all SRS resources in the resource set, or those that satisfy the presence of SBFD symbols for the time domain locations of all SRS resources in the resource set, and SRS frequency resources that do not overlap with RB outer UL usable PRBs within the SBFD symbols, and that satisfy the UE capabilities regarding the minimum timing requirement between the triggering of the PDCCH and all SRS resources in the resource set.

[0084] (Option 9): Usable slots are slots that satisfy the presence of UL symbols or flexible symbols for the time domain positions for all SRS resources in the resource set, or slots that satisfy the presence of SBFD (DL) symbols for the time domain positions for all SRS resources in the resource set, and SRS frequency resources (if any) that do not overlap with UL usable PRBs outside the RB for SRS resources in the SBFD symbols, and satisfy the UE capability for minimum timing requirements between triggering the PDCCH and all SRS resources in the resource set.

[0085] (Option 10): Usable slots are slots that satisfy that there is an SBFD symbol for the time domain position of all SRS resources in the resource set, and SRS frequency resources that do not overlap with UL usable PRBs outside of RBs within the SBFD symbol, and that satisfy the UE capability regarding the minimum timing requirement between the trigger of the PDCCH and all SRS resources in the resource set.

[0086] (3.4) Operation Example 2 In this operation example, whether to apply the extended available slot counting rule or the conventional available slot counting rule to trigger A-SRS is determined by the following method.

[0087] (Alt 1): Predefined by the specification. For example, if the UE is provided with the time and frequency domain locations of the SBFD subbands, if one or more SRS resource sets are configured in all configured BWPs within a component carrier, and at least one resource set is configured with a multi-value availableSlotOffsetList parameter, the UE may apply the extended available slot counting rule as in Operation Example 1.

[0088] (Alt 2): Configured by RRC. For example, a new RRC parameter (availableSlotCounting-sbfd (a tentative name is acceptable)) may be configured for an SRS resource set whose upper layer parameter resourceType is set to "aperiodic", or may be configured for an SRS resource within an SRS resource set whose upper layer parameter resourceType is set to "aperiodic".

[0089] The RRC parameter may indicate whether to enable or disable the extended available slot counting rule as in Operation Example 1. Also, if the RRC parameter is specified as "enabled" (or "sbfd"), the extended available slot counting rule may be applied as in Operation Example 1. Otherwise, the conventional available slot counting rule may be applied to trigger A-SRS.

[0090] For example, a new available slot offset list for SBFD (e.g., availableSlotOffsetList-sbfd (may be tentatively named)) may be configured. When the new available slot offset list for SBFD is configured for the SRS resource set, the extended available slot count rule as in Operation Example 1 may be applied to trigger A-SRS. In other cases, the conventional available slot count rule may be applied to trigger A-SRS.

[0091] When a new available slot offset list for SBFD is configured for an SRS resource set, the SOI (SRS offset indicator) field of the DCI format that triggers A-SRS may be mapped to the value of the new available slot offset list for SBFD.

[0092] (Alt 3): Determined explicitly or implicitly based on the DCI that triggers the A-SRS resource set. For example, a new field for triggering A-SRS may be added to the DCI format (DCI 0_1 / 0_2 / 0_3 / 1_1 / 1_2 / 1_3). Whether or not to apply the extended available slot count for triggering A-SRS may be explicitly indicated.

[0093] The presence of the new field may be configured by RRC, for example, it may be configured for each DCI format, and the length of the new field may be 1 bit.

[0094] If a new field exists in the DCI format that triggers A-SRS and indicates an extended available slot count for SBFD, the extended available slot count rule may be applied as in Operation Example 1. Otherwise, the conventional available slot count rule may be applied to trigger A-SRS.

[0095] For example, the least significant / most significant (LSB / MSB) bits of the SOI field may be reinterpreted to indicate whether or not to apply an extended available slot count for triggering A-SRS. Specifically, whether or not to reinterpret the LSB / MSB bits of the SOI field for the available slot count rule of A-SRS may be configured by the RRC (e.g., in the case of a per DCI format).

[0096] If the RRC reinterprets the LSB / MSB bits of the SOI field and sets them to indicate "extended available slot count for SBFD," the extended available slot count rule of Operation Example 1 may be applied. Otherwise, the conventional available slot count rule may be applied to trigger A-SRS.

[0097] The maximum length of the SOI field may be increased to, for example, 3 bits. For example, whether to apply the extended available slot count rule may be implicitly determined based on the PDCCH symbol of the DCI format that triggers the SRS resource set, or, if the PDSCH / PUSCH / PUCCH is scheduled by the DCI, may be implicitly determined based on the PDSCH / PUSCH / PUCCH symbol scheduled by the DCI format that triggers the SRS resource set.

[0098] For example, if the PDCCH symbol that triggers A-SRS is present in the SBFD symbol, the extended available slot count rule may be applied as in Operation Example 1. Otherwise, the conventional available slot count rule may be applied to trigger A-SRS.

[0099] Furthermore, if the PDSCH / PUSCH / PUCCH symbol scheduled by the PDCCH that triggers A-SRS is present in the SBFD symbol (if the PDSCH / PUSCH / PUCCH is scheduled by DCI), the extended available slot count rule as in Operation Example 1 may be applied. Otherwise, the conventional available slot count rule may be applied to trigger A-SRS.

[0100] (Alt 4): Implicitly determined based on the frequency resource of the SRS. If the frequency resource of the SRS does not overlap with RBs outside the UL usable PRB, the extended usable slot count rule of Operation Example 1 may be applied. Otherwise, the conventional usable slot count rule may be applied to trigger A-SRS.

[0101] (Alt 5): Implicitly determined based on the reference slot (i.e., the reference slot n+k used as the starting point for the available slot count). For example, if the reference slot is configured with only SBFD symbols, the extended available slot count rule of Operation Example 1 may be applied. Otherwise, the conventional available slot count rule may be applied to trigger A-SRS.

[0102] Also, if the reference slot contains at least one SBFD symbol, the extended available slot counting rule of Operation Example 1 may be applied. Otherwise, the conventional available slot counting rule may be applied to trigger A-SRS.

[0103] (3.5) Modifications Which option in the above-described operation example 1 is applied may be defined by the 3GPP specifications, configured by the RRC (e.g., SRS resource set configuration, SRS resource configuration, or common configuration of all SRS resource sets on one BWP or across multiple BWPs of a serving cell), or indicated by the DCI that triggers A-SRS.

[0104] (3.6) UE Capability A UE may report the presence or absence of the following capabilities (UE Capability Information) regarding SBFD to the network. The UE Capability Information may be specified for each UE, frequency range (FR), frequency channel (FC), etc. Furthermore, RRC signaling and configuration for reporting the UE Capability Information may be specified (for each UE / FR / FC / etc.).

[0105] The following operational examples are possible: Supports an available slot count to trigger A-SRS taking SBFD symbols into consideration Supports A-SRS resources in an SRS resource set spanning SBFD symbols and non-SBFD symbols Supports A-SRS resources spanning SBFD symbols and non-SBFD symbols According to the above-described operational examples, the UE can assume that it can transmit A-SRS in at least one of the UL subband and the DL subband. The UE can also determine the slot to use for A-SRS transmission based on the conventional first rule or the second rule, which extends the target slot. This allows the UE to achieve more efficient A-SRS transmission while applying SBFD.

[0106] (4) Other Embodiments The contents of the present proposal have been explained above using examples, but it will be obvious to those skilled in the art that the present proposal is not limited to these descriptions and that various modifications and improvements are possible.

[0107] 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.

[0108] 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.

[0109] Furthermore, specific, dedicated, UE-specific, and UE-dedicated may be interchangeable. Similarly, common, shared, group-common, UE-common, and UE-shared may be interchangeable.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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 7 is a diagram showing an example of the hardware configuration of the devices. As shown in Figure 7, 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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).

[0123] 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).

[0124] Furthermore, each device such as the processor 1001 and the memory 1002 is connected to 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.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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).

[0133] 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).

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0139] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or other corresponding information. For example, a radio resource may be indicated by an index.

[0140] 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.

[0141] 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.

[0142] 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)).

[0143] 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.

[0144] 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.

[0145] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0146] 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.

[0147] 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.

[0148] 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).

[0149] 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.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] 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.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] 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.

[0162] 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.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] 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.

[0167] 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."

[0168] 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.

[0169] 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.

[0170] The reference signal may also be abbreviated as Reference Signal (RS) and may be called a pilot depending on the applicable standard.

[0171] 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."

[0172] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0173] 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.

[0174] 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.

[0175] 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.

[0176] 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.

[0177] 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."

[0178] Fig. 8 shows an example of the configuration of a vehicle 2001. As shown in Fig. 8, 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.

[0179] 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).

[0180] 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.

[0181] 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.

[0182] 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.

[0183] 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.

[0184] 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.

[0185] 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.

[0186] 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.

[0187] (Additional Note) The above disclosure may be expressed as follows: A first feature is a terminal including: a communication unit that transmits and receives radio signals in accordance with a subband full-duplex communication scheme in which uplink subbands and downlink subbands are allocated non-overlappingly in the frequency direction within a specified time period based on time division duplexing, and a control unit that assumes that a non-periodic sounding reference signal can be transmitted in at least one of the uplink subbands and the downlink subbands.

[0188] In a second feature based on the first feature, it is assumed that the control unit can transmit the sounding reference signal in a time unit in which the subband full-duplex communication scheme is applied.

[0189] A third feature is that, in the first or second feature, the control unit determines the slots to be used for transmitting the sounding reference signal based on a first rule or a second rule in which the target slots are expanded more than the first rule.

[0190] A fourth feature is any one of the first to third features, wherein the control unit applies either the first rule or the second rule based on a position of a reference slot.

[0191] 10 Wireless communication system 20 NG-RAN 100 gNB 200 UE 210 Wireless signal transceiver 220 Amplifier 230 Modulation / demodulation unit 240 Control signal / reference signal processing unit 250 Encoding / decoding unit 260 Data transceiver 270 Control unit 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus 2001 Vehicle 2002 Drive unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Left and right front wheels 2008 Left and right rear wheels 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication module 2021 Current sensor 2022 RPM sensor 2023 Air pressure sensor 2024 Vehicle speed sensor 2025 Acceleration sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor 2030 Driving assistance system section 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port

Claims

1. A terminal comprising: a communication unit that transmits and receives radio signals according to a subband full-duplex communication method in which uplink subbands and downlink subbands are allocated non-overlapping in the frequency direction within a specified time based on time division duplex; and a control unit that assumes that a non-periodic sounding reference signal can be transmitted in at least one of the uplink subbands and the downlink subbands.

2. The terminal according to claim 1, wherein the control unit assumes that the sounding reference signal can be transmitted in a time unit in which the subband full-duplex communication method is applied.

3. The terminal according to claim 1, wherein the control unit determines the slots to be used for transmitting the sounding reference signal based on a first rule or a second rule in which the target slots are expanded more than those of the first rule.

4. The terminal according to claim 3, wherein the control unit applies either the first rule or the second rule based on the position of the reference slot.

5. A wireless communication method in a terminal, comprising: a step of transmitting and receiving wireless signals according to a subband full-duplex communication method in which uplink subbands or downlink subbands are allocated non-overlapping in the frequency direction within a specified time based on time division duplex; and a step of assuming that a non-periodic sounding reference signal can be transmitted in at least one of the uplink subbands and the downlink subbands.

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