Terminal, base station, wireless communication system, and wireless communication method

Abstract

This terminal comprises: a communication unit that executes communication of uplink and downlink signals in a time-division duplex band; and a control unit that executes, in a case where a synchronization signal from an additional cell is set in a subband of the uplink signal, an operation related to uplink signal transmission in the subband of the uplink signal where the synchronization signal has been set.

Description

Terminal, base station, wireless communication system, and wireless communication method

[0001] The present disclosure relates to a terminal, a base station, a wireless communication system, and a wireless communication method in a next-generation mobile communication system.

[0002] The 3rd Generation Partnership Project (3GPP) has developed 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 18 is considering an extension of the duplex method (Non-Patent Document 1). Specifically, SBFD (Sub-Band non-overlapping Full Duplex) is proposed as a new duplex method that enables simultaneous use of the downlink (DL) and uplink (UL) within a carrier in a time division duplex (TDD) band. SBFD may also be read as XDD (Cross Division Duplex).

[0004] "New SI: Study on evolution of NR duplex operation", RP-213591, 3GPP TSG RAN#94-e, 3GPP, December 2021

[0005] Incidentally, 3GPP Release 16 defines an information element (directionalCollisionHandling-r16) that specifies whether or not to use directional collision handling for DL / UL in half-duplex communication operation between a reference cell and another cell in TDD Carrier Aggregation (CA).

[0006] Similarly, in 3GPP Release 17, in DC (Dual Connectivity), an information element (directionalCollisionHandling-DC-r17) is defined that specifies whether or not to use directional collision handling for DL / UL in half-duplex communication operation between a reference cell and another cell.

[0007] Against this background, the inventors, after careful consideration, have found that there is a need to clarify the operation of an SBFD-aware UE when a case is assumed in which two or more serving cells, including a serving cell that operates in SBFD, may be configured and when it is configured to apply directional collision handling.

[0008] Therefore, the present disclosure has been made to solve the above-mentioned problems, and aims to provide a terminal, a base station, a wireless communication system, and a wireless communication method that can clarify the operation related to SBFD-aware UE when considering cases in which directional collision handling may be configured to be applied.

[0009] The disclosed aspect is a terminal including: a communication unit that communicates with a duplex cell that can perform simultaneous communication of an uplink signal and a downlink signal within a time division duplex band; and a control unit that, when two or more serving cells include the duplex cell, determines whether or not to set a method for dealing with collisions related to the uplink signal and the downlink signal.

[0010] The disclosed aspect is a base station including: a communication unit that communicates with a terminal via a duplex cell that can perform simultaneous communication of an uplink signal and a downlink signal within a time division duplex band; and a control unit that determines whether to set the application of a collision prevention method for the uplink signal and the downlink signal when two or more serving cells include the duplex cell.

[0011] The disclosed aspect is a wireless communication system including a terminal and a base station, wherein the terminal includes a communication unit that communicates with a duplex cell that can perform simultaneous communication of an uplink signal and a downlink signal within a time division duplex band, and a control unit that, when two or more serving cells include the duplex cell, determines whether or not to set a method for dealing with collisions related to the uplink signal and the downlink signal.

[0012] The disclosed aspect is a wireless communication method comprising: step A of communicating with a duplex cell capable of simultaneous communication of uplink signals and downlink signals within a time division duplex band; and step B of determining whether or not a setting is made to apply a collision prevention measure for the uplink signals and the downlink signals when two or more serving cells include the duplex cell.

[0013] FIG. 1 is a diagram illustrating an overall schematic configuration of a wireless communication system 10. FIG. 2 is a diagram illustrating a frequency range used in the wireless communication system 10. FIG. 3 is a diagram illustrating an example configuration of a radio frame, a subframe, and a slot used in the wireless communication system 10. FIG. 4 is a functional block configuration diagram of a UE 200. FIG. 5 is a functional block configuration diagram of a gNB 100. FIG. 6 is a diagram illustrating the problem. FIG. 7 is a diagram illustrating the problem. FIG. 8 is a diagram illustrating Operation Example 3. FIG. 9 is a diagram illustrating Operation Example 4. FIG. 10 is a diagram illustrating Operation Example 4. FIG. 11 is a diagram illustrating Operation Example 5. FIG. 12 is a diagram illustrating Operation Example 5. FIG. 13 is a diagram illustrating Operation Example 6. FIG. 14 is a diagram illustrating Operation Example 6. FIG. 15 is a diagram illustrating an example of the hardware configuration of a gNB 100 and a UE 200. FIG. 16 is a diagram illustrating an example configuration of a vehicle 2001.

[0014] 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.

[0015] (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 an 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 (User Equipment) 200).

[0016] The wireless communication system 10 may be a wireless communication system conforming to a system called Beyond 5G, 5G Evolution, or 6G.

[0017] The NG-RAN 20 includes a base station 100 (hereinafter, gNB 100). Note that the specific configuration of the wireless communication system 10, including the number of gNBs 100 and UEs 200, is not limited to the example shown in FIG.

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

[0019] The gNB100 is a radio base station conforming to 5G, and performs 5G radio communication with the UE 200. The gNB100 and UE 200 are capable of supporting Massive MIMO (Multiple-Input Multiple-Output), which generates a more directional 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 on two or more transport blocks between the UE and each of two NG-RAN nodes.

[0020] The wireless communication system 10 also supports a plurality of frequency ranges (FR).

[0021] First, the wireless communication system 10 may support multiple frequency ranges (FR) as shown in Fig. 2. For example, the wireless communication system 10 supports FR1, FR2-1, and FR2-2. The frequency bands of each FR are as follows:

[0022] ・FR1: 410 MHz to 7.125 GHz ・FR2-1: 24.25 GHz to 52.6 GHz ・FR2-2: Over 52.6 GHz to 71 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 is a higher frequency than FR1 and may use an SCS of 60 kHz or 120 kHz (including 240 kHz) and a bandwidth (BW) of 50 to 400 MHz.

[0023] 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.

[0024] Furthermore, the wireless communication system 10 may also be compatible with frequency bands higher than the FR2 frequency band. Specifically, the wireless communication system 10 may be compatible with frequency bands exceeding 52.6 GHz up to 71 GHz or 114.25 GHz.

[0025] Second, the wireless communication system 10 may support the radio frames, subframes, and slots shown in FIG.

[0026] As shown in Figure 3, one slot consists of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period). In addition to 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz, the SCS may also use 480 kHz, 960 kHz, etc.

[0027] Furthermore, the number of symbols constituting one slot does not necessarily have to be 14 (for example, 28 symbols or 56 symbols). Furthermore, the number of slots per subframe may differ depending on the SCS.

[0028] The time direction (t) shown in Fig. 3 may be called a time domain, a symbol period, a symbol time, etc. The frequency direction may be called a frequency domain, a resource block, a subcarrier, a bandwidth part (BWP), etc.

[0029] (2) Functional Block Configuration of Wireless Communication System Next, the functional block configuration of the wireless communication system 10 will be described.

[0030] First, the functional block configuration of the UE 200 will be described.

[0031] Fig. 4 is a functional block diagram of UE 200. As shown in Fig. 4, UE 200 includes radio signal transmitting / receiving unit 210, amplifier unit 220, modem unit 230, control signal / reference signal processing unit 240, encoding / decoding unit 250, data transmitting / receiving unit 260, and control unit 270.

[0032] The radio signal transmitting / receiving unit 210 transmits and receives radio signals conforming to NR. The radio signal transmitting / receiving unit 210 supports Massive MIMO, CA that uses a bundle of multiple CCs, and DC that simultaneously communicates between a UE and two NG-RAN nodes.

[0033] In the embodiment, the radio signal transceiver 210 constitutes a communication unit that communicates with a duplex cell capable of simultaneous communication of an uplink signal (hereinafter, referred to as a UL signal) and a downlink signal (hereinafter, referred to as a DL signal) within a time division duplex band. Note that a new duplex cell capable of simultaneous communication of a UL signal and a DL signal may be referred to as SBFD (Sub-Band non-overlapping Full Duplex). SBFD may also be read as XDD (Cross Division Duplex).

[0034] Simultaneous communication of UL signals and DL signals may be performed using specific time resources. The specific time resources are time resources to which SBFD can be applied. The specific time resources may also be interpreted as SBFD resources (SBFD symbols / slots) that are quasi-statically or dynamically configured in the time direction (or the time domain). The specific time resources may also be interpreted as resources in which UL sub-band(s) and DL sub-band(s) are simultaneously configured quasi-statically or dynamically in the time direction (or the time domain).

[0035] The duplex mode cell may be referred to as an SBFD operation cell. The additional cell may be referred to as an Additional PCI (Physical Cell Identifier) ​​Cell. The Additional PCI PCI Cell may include an SBFD operation cell or a cell that does not operate in SBFD (Legacy cell).

[0036] 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.

[0037] The modem unit 230 performs data modulation / demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication destination (gNB 100 or another gNB). 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).

[0038] 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 .

[0039] 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.

[0040] 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).

[0041] 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.

[0042] 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.

[0043] The channels include control channels and data channels, such as a PDCCH (Physical Downlink Control Channel), a PUCCH (Physical Uplink Control Channel), a RACH (Random Access Channel), a Downlink Control Information (DCI) including a Random Access Radio Network Temporary Identifier (RA-RNTI), and a Physical Broadcast Channel (PBCH).

[0044] Furthermore, the data channel includes a PDSCH (Physical Downlink Shared Channel) and a PUSCH (Physical Uplink Shared Channel). Data refers to data transmitted via the data channel. The data channel may be interpreted as a shared channel.

[0045] Here, the control signal and reference signal processor 240 may receive downlink control information (DCI). The DCI includes existing fields for storing DCI Formats, Carrier indicator (CI), BWP indicator, FDRA (Frequency Domain Resource Assignment), TDRA (Time Domain Resource Assignment), MCS (Modulation and Coding Scheme), HPN (HARQ Process Number), NDI (New Data Indicator), RV (Redundancy Version), and the like.

[0046] The value stored in the DCI Format field is an information element that specifies the format of the DCI. The value stored in the CI field is an information element that specifies the CC to which the DCI applies. The value stored in the BWP indicator field is an information element that specifies the BWP to which the DCI applies. The BWP that can be specified by the BWP indicator is set by an information element (BandwidthPart-Config) included in the RRC message. The value stored in the FDRA field is an information element that specifies the frequency domain resource to which the DCI applies. The frequency domain resource is identified by the value stored in the FDRA field and an information element (RA Type) included in the RRC message. The value stored in the TDRA field is an information element that specifies the time domain resource to which the DCI applies. The time domain resource is identified by the value stored in the TDRA field and information elements (pdsch-TimeDomainAllocationList, pusch-TimeDomainAllocationList) included in the RRC message. The time domain resource may be identified by the value stored in the TDRA field and a default table. The value stored in the MCS field is an information element that specifies the MCS to which the DCI applies. The MCS is identified by the value stored in the MCS and an MCS table. The MCS table may be specified by an RRC message or may be determined by RNTI scrambling. The value stored in the HPN field is an information element that specifies the HARQ process to which the DCI is applied. The value stored in the NDI field is an information element for specifying whether the data to which the DCI is applied is initial transmission data. The value stored in the RV field is an information element that specifies the redundancy of the data to which the DCI is applied.

[0047] The encoding / decoding unit 250 performs data division / concatenation and channel coding / decoding for each predetermined communication destination (gNB100 or another gNB).

[0048] 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.

[0049] 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 (HARQ).

[0050] The control unit 270 controls each functional block constituting the UE 200. In the embodiment, the control unit 270 configures a control unit that, when two or more serving cells include a SBFD operation cell, assumes whether or not a setting is made to apply a collision handling for UL signals and DL signals. The collision handling for UL signals and DL signals may be referred to as directional collision handling. The directional collision handling may be a half-duplex communication operation between a reference cell and another cell in TDD Carrier Aggregation (CA), or may be a half-duplex communication operation between a reference cell and another cell in DC (Dual Connectivity).

[0051] Secondly, we will explain the functional block configuration of gNB100.

[0052] Fig. 5 is a functional block diagram of the gNB 100. As shown in Fig. 5, the gNB 100 has a receiving unit 110, a transmitting unit 120, and a control unit 130.

[0053] The receiving unit 110 receives various signals from the UE 200. The receiving unit 110 may receive an UL signal via a PUCCH or a PUSCH.

[0054] The transmitter 120 transmits various signals to the UE 200. The transmitter 120 may transmit the DL signal via the PDCCH or the PDSCH.

[0055] In the embodiment, the receiving unit 110 and the transmitting unit 120 constitute a communication unit that communicates with the UE 200 via a SBFD operation cell that can perform simultaneous communication of UL signals and DL signals within the TDD band.

[0056] The control unit 130 controls the gNB 100. In the embodiment, the control unit 130 configures a control unit that determines whether to set directional collision handling when two or more serving cells include a SBFD operation cell.

[0057] (3) Issues First, we will explain resource allocation for gNB100.

[0058] In Releases 15, 16, and 17, the gNB 100 sets or designates "DL," "F (Flexible)," or "UL" for each symbol, as shown in the upper part of Figure 6. Simultaneous transmission of DL and UL signals is not permitted in a given time resource.

[0059] On the other hand, in Release 18, as shown in the lower part of Figure 6, the gNB 100 sets or designates "DL" for symbols of certain frequency resources (e.g., sub-band(s)) and sets or designates "UL" for symbols of other frequency resources (e.g., sub-band(s)). Simultaneous communication of DL signals and UL signals is permitted in certain time resources. This method may be referred to as SBFD (Sub-Band non-overlapping Full Duplex).

[0060] Second, directional collision handling will be described. As described above, directional collision handling is a half-duplex communication operation between a reference cell and another cell in CA, DC, or the like. In CA, the information element for setting directional collision handling may be referred to as directionalCollisionHandling-r16. In DC, the information element for setting directional collision handling may be referred to as directionalCollisionHandling-DC-r17. Hereinafter, the information element for setting directional collision handling may be simply referred to as directionalCollisionHandling. In directional collision handling, collisions related to DL / UL are handled according to the following procedure.

[0061] In the first step, UE200 determines a set of cells (candidate reference cells) to be considered in determining a reference cell when two or more serving cells are configured and directionalCollisionHandling is configured in at least one of the two or more configured serving cells.

[0062] In the second procedure, the UE 200 determines a reference cell from the set of cells. For example, the UE 200 determines a cell with the smallest cell index as the reference cell.

[0063] In a third step, the UE 200 determines how to handle collisions (directional collision handling method) corresponding to the symbols of the reference cell and the symbols of other cells.

[0064] Against this background, the inventors conducted extensive research and, as a result, focused on the fact that cases can be anticipated in which two or more serving cells, including a serving cell operating in SBFD, may be configured, and came up with the following considerations.

[0065] First, when two or more serving cells include an SBFD operation cell, it is necessary to consider the fact that an SBFD-aware UE exists, and it is necessary to consider whether or not there is a restriction on two or more serving cells including an SBFD operation cell from the viewpoint of UE 200. For example, it is necessary to consider whether or not it is permitted for two or more serving cells to include an SBFD operation cell, whether the SBFD operation cell may be a PCell / PSCell / SCell, etc.

[0066] Second, when two or more serving cells, including a serving cell operating in SBFD, are configured in UE 200, the operation regarding directional collision handling is unclear. For example, as shown in Fig. 7, SBFD in CC#1 is assumed in addition to D in CC#3 and U in CC#2. In such a case, it is necessary to consider whether the SBFD operation cell (CC#1) should be taken into consideration, or whether the SBFD symbol of the SBFD operation cell (CC#1) should be taken into consideration.

[0067] As described above, after careful consideration, the inventors have envisaged a case in which two or more serving cells, including a serving cell that operates in SBFD, may be configured, and have found that there is a need to clarify the operation of an SBFD-aware UE when directional collision handling is configured.

[0068] (4) Definition of Terms The following explains the definitions of terms related to SBFD.

[0069] The SBFD operation cell is a cell in which the position of the SBFD sub-band in the time or frequency direction is configured in the serving cell.

[0070] A non-SBFD operation cell is a cell in which no SBFD sub-bands are configured in the serving cell.

[0071] Half duplex CA serving cells is a serving set in which directionalCollisionHandling-r16 with a value of "enabled" is provided to UE 200 when UE 200 supports half-duplex communication in CA. The following variations of Half duplex CA serving cells may be assumed:

[0072] In variation 1, as an additional condition, a new UE capability may be defined in which UE 200 supports directional collision handling for half-duplex communication in CA in a case including an SBFD operation cell. When the new UE capability is reported, directional collision handling for half-duplex communication in CA in a case including an SBFD operation cell may be performed.

[0073] In Variation 2, a new upper layer parameter (e.g., directionalCollisionHandling-SBFD-CA-r19) may be introduced to apply directional collision handling for half-duplex communication in CA in a case including an SBFD operation cell. The new upper layer parameter may be a parameter transmitted from the SBFD operation cell. In such a case, directionalCollisionHandling-r16 having a value of "enabled" may be provided to UE200 from the non-SBFD operation cell, and directionalCollisionHandling-SBFD-CA-r19 having a value of "enabled" may be provided to UE200 from the SBFD operation cell.

[0074] A semi-static DL slot / symbol is a slot / symbol configured as DL by higher layer parameters (tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated).

[0075] A semi-static UL slot / symbol is a slot / symbol configured as a UL by higher layer parameters (tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated).

[0076] A semi-static flexible slot / symbol is a slot / symbol that is set as Flexible by a higher layer parameter (tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated).

[0077] A Dynamic DL slot / symbol is a slot / symbol that is set as Flexible by higher layer parameters (tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated) and is specified as DL by DCI Format 2_0.

[0078] A Dynamic UL slot / symbol is a slot / symbol that is set as Flexible by the upper layer parameters (tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated) and is specified as UL by DCI Format 2_0.

[0079] A dynamic flexible slot / symbol is a slot / symbol that is set as Flexible by higher layer parameters (tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated) and is specified as Flexible by DCI Format 2_0.

[0080] The SBFD DL symbol is a symbol configured as DL by the higher layer parameters (tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated), and is the symbol in which the UL Sub-band is configured.

[0081] The SBFD flexible symbol is a symbol that is set as Flexible by the higher layer parameters (tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated), and is a symbol in which the UL Sub-band is set.

[0082] (5) Operational Example In order to solve the above-described problem, the following operational example may be defined. Specifically, the following mainly describes a case in which the UE 200 communicates with two or more serving cells in CA or DC.

[0083] (5.1) Operation Example 1 In Operation Example 1, it will be explained whether or not two or more serving cells are allowed to include an SBFD operation cell. As Operation Example 1, the following options are considered.

[0084] In option 1-1, UE 200 supports two or more serving cells including at least one SBFD operation cell.

[0085] Specifically, the UE 200 assumes the configuration of two or more serving cells including X or less serving cells configured at the time and frequency positions of the SBFD sub-band. Hereinafter, the serving cell configured at the time and frequency positions of the SBFD sub-band is referred to as an SBFD operation cell.

[0086] The maximum number of SBFD operation cells may be X. The value of X may be defined or reported separately or individually for a case where the serving cell is included in a PUCCH group (within PUCCH Group) and a case where the serving cell spans PUCCH groups (across PUCCH Group). The value of X may be 1 or a number greater than 1. The value of X may be predetermined in the wireless communication system 10, or may be equal to or less than the capability reported in the UE capability.

[0087] In option 1-1, when two or more serving cells are configured, at least one of the PCell, the PSCell, and the SCell may be configured in the UE 200 as the SBFD operation cell.

[0088] In option 1-1, when two or more serving cells include an SBFD operation cell, the same numerology may be assumed for the SBFD operation cell.

[0089] In option 1-2, UE 200 does not support two or more serving cells including at least one SBFD operation cell.

[0090] Specifically, the UE 200 does not assume the configuration of two or more serving cells, including a serving cell configured at the time and frequency position of the SBFD sub-band.

[0091] In option 1-2, when two or more serving cells are configured for UE 200, the time and frequency locations of the SBFD sub-band are not configured in any of the serving cells (in the cell group of the SBFD operation cell).

[0092] In the operation example 2 and operation example 3 described below, option 1-1 may be assumed.

[0093] (5.2) Operation Example 2 In Operation Example 2, directional collision handling in half-duplex communication will be described in a case where two or more serving cells include at least one SBFD operation cell. As Operation Example 2, the following options are considered.

[0094] In option 2-1, UE 200 may assume that directional collision handling is not configured in any of the two or more serving cells.

[0095] Specifically, when two or more serving cells include at least one SBFD operation cell, the higher layer parameter (e.g., directionalCollisionHandling-r16) is not set in any of the serving cells.

[0096] In other words, when two or more serving cells include at least one SBFD operation cell, UE 200 does not assume the setting of a higher layer parameter (e.g., directionalCollisionHandling-r16) in any of the serving cells.

[0097] The UE 200 does not assume directional collision handling between serving cells where the UE 200 cannot transmit and receive simultaneously.

[0098] According to Option 2-1, there is no need to change the existing directional collision handling applied to CA, etc.

[0099] In option 2-2, UE 200 may assume that directional collision handling is not configured in the SBFD operation cells included in two or more serving cells.

[0100] Specifically, when two or more serving cells include at least one SBFD operation cell, the higher layer parameters (eg, directionalCollisionHandling-r16) are not set in the SBFD operation cell.

[0101] In other words, when two or more serving cells include at least one SBFD operation cell, UE 200 does not assume the setting of a higher layer parameter (for example, directionalCollisionHandling-r16) in the SBFD operation cell.

[0102] After performing directional collision handling for the non-SBFD operation cell, the UE 200 does not assume directional collision handling between serving cells with which the UE 200 cannot simultaneously perform transmission and reception.

[0103] The UE 200 may not always assume the setting of an upper layer parameter (e.g., directionalCollisionHandling-r16) in the SBFD operation cell. For example, when an upper layer parameter (e.g., directionalCollisionHandling-r16) is set in the SBFD operation cell, the UE 200 may ignore the upper layer parameter (e.g., directionalCollisionHandling-r16).

[0104] In option 2-2, if the setting of directional collision handling is not performed or assumed in the SBFD operation cell, the setting of directional collision handling may not be performed or assumed in any cell in the same frequency band as the SBFD operation cell.If the setting of directional collision handling is not performed or assumed in the SBFD operation cell, the setting of directional collision handling may not be performed or assumed in any cell in the same cell group as the SBFD operation cell.

[0105] In option 2-2, UE200 may not always assume the setting of an upper layer parameter (e.g., directionalCollisionHandling-r16) in any cell in the same frequency band as the SBFD operation cell. UE200 may not always assume the setting of an upper layer parameter (e.g., directionalCollisionHandling-r16) in any cell in the same cell group as the SBFD operation cell. For example, when an upper layer parameter (e.g., directionalCollisionHandling-r16) is set in any cell in the same frequency band or cell group as the SBFD operation cell, UE200 may ignore the upper layer parameter (e.g., directionalCollisionHandling-r16).

[0106] According to Option 2-2, there is no need to change the existing directional collision handling applied to CA, etc.

[0107] In option 2-3, UE 200 may assume that directional collision handling is configured in an SBFD operation cell included in two or more serving cells.

[0108] Specifically, when two or more serving cells include at least one SBFD operation cell, the higher layer parameters (e.g., directionalCollisionHandling-r16) are configured for the SBFD operation cell.

[0109] In other words, when two or more serving cells include at least one SBFD operation cell, UE 200 assumes the setting of a higher layer parameter (eg, directionalCollisionHandling-r16) in the SBFD operation cell.

[0110] In Option 2-3, a new higher layer parameter (e.g., directionalCollisionHandling-SBFD-CA-r19) may be introduced. The new higher layer parameter may be configured in the SBFD operation cell or any other serving cell.

[0111] For example, if a new upper layer parameter (e.g., directionalCollisionHandling-SBFD-CA-r19) is not set for an SBFD operation cell and an existing upper layer parameter (e.g., directionalCollisionHandling-r16) is set for a set of other cells that do not involve SBFD operation, UE200 may apply directional collision handling to a set of non-SBFD operation cells (other cells).

[0112] For example, when a new upper layer parameter (e.g., directionalCollisionHandling-SBFD-CA-r19) is configured for an SBFD operation cell and an existing upper layer parameter (e.g., directionalCollisionHandling-r16) is configured for a set of other cells without SBFD operation, UE200 may apply directional collision handling to the SBFD operation cell and the non-SBFD operation cell.

[0113] For example, when a new upper layer parameter (e.g., directionalCollisionHandling-SBFD-CA-r19) is configured for a set of SBFD operation cells and an existing upper layer parameter (e.g., directionalCollisionHandling-r16) is configured for another set of cells without SBFD operation, UE200 may perform the following operations.

[0114] In Step 1, UE 200 applies directional collision handling to a set of non-SBFD operation cells (other cells) based on existing higher layer parameters. As a result, the directions of half-duplex TDD CA cells without SBFD operation are aligned.

[0115] In Step 2, the UE 200 applies directional collision handling to the set of SBFD operation cells based on the new upper layer parameters, resulting in the direction of the half-duplex TDD CA cells with SBFD operation being aligned.

[0116] In Step 3, UE 200 applies directional collision handling between the set of non-SBFD operation cells and the set of SBFD operation cells. In such a case, the following options are considered.

[0117] In option a, UE 200 may always prioritize the direction of the SBFD operation cell, or alternatively, UE 200 may always prioritize the direction of the non-SBFD operation cell.

[0118] In option b, UE 200 may treat the SBFD operation cell as a reference cell in Step 2. The method of treating the SBFD operation cell as a reference cell may be the method of operation example 4 described later or an existing method. For example, when the symbol of the reference cell is an SBFD symbol, the method of operation example 4 described later may be applied, and when the symbol of the reference cell is a non-SBFD symbol, the existing method may be applied.

[0119] In option c, UE 200 may treat the non-SBFD operation cell in Step 1 as a reference cell. The method of treating the non-SBFD operation cell as a reference cell may be the method of operation example 5 described later or an existing method. For example, when the symbol of the other cell is an SBFD symbol, the method of operation example 5 described later may be applied, and when the other symbol is a non-SBFD symbol, the existing method may be applied.

[0120] (5.3) Operation Example 3 In Operation Example 3, a case will be described in which directional collision handling for half-duplex communication is set when two or more serving cells include at least one SBFD operation cell. That is, Operation Example 3 may be considered to be an operation example based on Option 2-3 of Operation Example 2 described above.

[0121] First, an example of an operation relating to the first procedure for determining a set of cells (reference cell candidates) to be considered in determining the reference cell will be described. As such an example of an operation, the following options are possible.

[0122] In option 3-1, the UE 200 determines the reference cell candidates according to existing rules without considering SBFD symbols and non-SBFD symbols.

[0123] Specifically, the UE 200 determines the reference cell candidates according to existing rules. For example, the UE 200 may handle the SBFD symbol and the DL symbol without distinguishing between them.

[0124] According to Option 3-1, there is no need to change the existing rules. However, the existing rules are based on semi-static configuration (e.g., semi-static SFI (Slot Format Indicator), RRC configured DL / UL reception / transmission). Therefore, Flexible symbols without semi-static configuration are not considered when determining reference cell candidates.

[0125] In option 3-2, UE 200 determines the reference cell candidates without considering the SBFD operation cell.

[0126] Specifically, UE 200 excludes SBFD operation cells and then determines reference cell candidates from non-SBFD operation cells according to existing rules. That is, the reference cell candidates are determined without considering whether the symbol is an SBFD symbol of an SBFD operation cell or a non-SBFD symbol.

[0127] According to Option 3-2, the reference cell candidate is determined from among the non-SBFD operation cells, so the existing rules can be reused. However, since the SBFD operation cell cannot be the reference cell, the priority of the SBFD operation cell is low in directional collision handling.

[0128] In option 3-3, the UE 200 determines the reference cell candidates without taking the SBFD symbol into consideration.

[0129] Specifically, the UE 200 determines candidate reference cells for the symbols. In such a case, the symbols may be as follows:

[0130] A symbol is downlink or uplink as specified by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated if SBFD UL Sub-band is not configured for the symbol.

[0131] A symbol is uplink if the symbol is Flexible, the SBFD UL sub-band is not configured for the symbol, and the UE 200 transmits SRS, PUCCH, PUSCH, or PRACH in the symbol.

[0132] A symbol is downlink if the symbol is Flexible, the SBFD UL sub-band is not configured for the symbol, and the UE 200 receives a PDCCH, a PDSCH, or a CSI-RS in the symbol.

[0133] In option 3-3, if the symbol is an SBFD symbol of an SBFD operation cell, the SBFD operation cell is not considered as a candidate for the reference cell. If the symbol is a Non-SBFD symbol of an SBFD operation cell, the SBFD operation cell is considered as a candidate for the reference cell.

[0134] According to option 3-3, reference cell candidates are determined from cells whose symbols are non-SBFD symbols, so existing rules can be reused. Since the SBFD operation cell of an SBFD symbol cannot be used as a reference cell, the priority of the SBFD operation cell is low in directional collision handling.

[0135] In option 3-4, the UE 200 determines the reference cell candidates without taking the SBFD symbol into consideration or taking the SBFD symbol into consideration.

[0136] Specifically, UE200 determines whether to take SBFD symbols into consideration when determining candidate reference cells depending on whether PDCCH / PDSCH / CSI-RS (in DL sub-band) is configured by a higher layer and whether PUCCH / PUSCH / PRACH / SRS (in UL sub-band) is configured by a higher layer.

[0137] For example, if the symbol is the SBFD symbol of the serving cell, the serving cell is considered in determining the reference cell candidates in one or more of the following cases:

[0138] Case-a is a case in which UE 200 transmits PUCCH / PUSCH / PRACH / SRS in symbols (within the UL-Sub-band) as shown in FIG. 8 .

[0139] Case-b is a case in which UE 200 receives PDCCH / PDSCH / CSI-RS in symbols (in the DL-sub-band) as shown in FIG. 8 .

[0140] Case-c is a case in which UE 200 does not transmit PUCCH / PUSCH / PRACH / SRS in symbols (in the UL-subband) and does not receive PDCCH / PDSCH / CSI-RS in symbols (in the DL-subband), as shown in FIG. 8 .

[0141] Case-d is a case in which UE 200 simultaneously transmits PUCCH / PUSCH / PRACH / SRS in symbols (in the UL-subband) and receives PDCCH / PDSCH / CSI-RS in symbols (in the DL-subband), as shown in FIG. 8 .

[0142] Which case to apply may be predetermined in the wireless communication system 10 or may be set by the RRC.

[0143] For example, for Case-a and Case-b, the SBFD operation cell of the SBFD symbol may be considered as a candidate for the reference cell. For Case-a, the symbol may be considered to be an (RRC) UL symbol. A rule similar to the existing rule that "the symbol is Flexible and the UE 200 transmits SRS, PUCCH, PUSCH, or PRACH at the symbol" may be applied to the SBFD symbol. For Case-b, the symbol may be considered to be an (RRC) DL symbol. A rule similar to the existing rule that "the symbol is Flexible and the UE 200 receives PDCCH, PDSCH, or CSI-RS at the symbol" may be applied to the SBFD symbol.

[0144] For example, in Case-c, the SBFD operation cell may not be considered as a candidate for the reference cell.

[0145] For example, for Case-d, the SBFD operation cell may be considered as a candidate for the reference cell, or the SBFD operation cell may not be considered as a candidate for the reference cell. For example, when it is defined in the wireless communication system 10 that UL / DL transmission / reception (of UL / DL sub-bands) (configured by a higher layer) always takes priority over DL / UL transmission / reception (of DL / UL sub-bands) (configured by a higher layer), the SBFD operation cell may be considered as a candidate for the reference cell, and the symbol may be assumed to be an (RRC) UL / DL symbol.

[0146] In Option 3-4, different cases may be applied for the SBFD DL symbol and the SBFD Flexible symbol. For example, for the SBFD DL symbol, the SBFD operation cell may be considered as a candidate for the reference cell in Case-a to Case-d. For the SBFD Flexible symbol, the SBFD operation cell may be considered as a candidate for the reference cell in Case-a and Case-b, but may not be considered as a candidate for the reference cell in Case-c and Case-d.

[0147] Secondly, an example of the operation of the first procedure for determining a reference cell from among the reference cell candidates will be described. As an example of such an operation, the following Alt. can be considered.

[0148] In Alt.3-a, the reference cell may be the cell with the smallest cell index among the reference cell candidates. Alt.3-1 is the same as the existing rule.

[0149] In Alt.3-b, the reference cell may be an SBFD operation cell with a higher priority. For example, if there is at least one SBFD operation cell among the reference cell candidates, the reference cell may be the cell with the smallest cell index among the at least one SBFD operation cell. If there is no SBFD operation cell among the reference cell candidates, the reference cell may be the cell with the smallest cell index among the reference cell candidates.

[0150] In Alt.3-c, the reference cell may be a non-SBFD operation cell with a higher priority. For example, if there is at least one non-SBFD operation cell among the reference cell candidates, the reference cell may be the cell with the smallest cell index among the at least one non-SBFD operation cell. If there is no non-SBFD operation cell among the reference cell candidates, the reference cell may be the cell with the smallest cell index among the reference cell candidates.

[0151] In Alt.3-d, the reference cell may be the SBFD operation cell of the SBFD symbol with the highest priority. For example, if there is an SBFD operation cell of at least one SBFD symbol among the reference cell candidates, the reference cell may be the cell with the smallest cell index among the SBFD operation cells of at least one SBFD symbol. If there is not an SBFD operation cell of at least one SBFD symbol among the reference cell candidates, the reference cell may be the cell with the smallest cell index among the reference cell candidates.

[0152] In Alt.3-e, the reference cell may be a non-SBFD operation cell of a non-SBFD symbol with a higher priority. For example, if there is at least one non-SBFD operation cell of a non-SBFD symbol among the reference cell candidates, the reference cell may be the cell with the smallest cell index among the non-SBFD operation cells of at least one non-SBFD symbol. If there is not at least one non-SBFD operation cell of a non-SBFD symbol among the reference cell candidates, the reference cell may be the cell with the smallest cell index among the reference cell candidates.

[0153] As described above, in the third operation example, when it is assumed that the SBFD operation cell is set to apply directional collision handling, the UE 200 determines the procedure for determining the reference cell according to the conditions. The procedure for determining the reference cell may include at least one of the first procedure and the second procedure described above. The conditions are those defined in the above-mentioned options and Alt.

[0154] (5.4) Operation Example 4 In Operation Example 4, a case will be described in which directional collision handling for half-duplex communication is configured when two or more serving cells include at least one SBFD operation cell. That is, Operation Example 4 may be considered to be an operation example based on Options 2-3 of Operation Example 2 described above.

[0155] In Operation Example 4, the third procedure for determining how to handle collisions (Directional Collision Handling method) corresponding to the symbol of the reference cell and the symbols of other cells will be mainly described. In Operation Example 4, the case where the symbol of the reference cell is an SBFD symbol and the symbols of other cells are Non-SBFD symbols will be described.

[0156] In the fourth operational example, the directional collision handling method may be determined based on the SBFD symbol of the reference cell (SBFD operation cell) from the following viewpoints.

[0157] Case 1 is a case in which UE 200 receives PDCCH, PDSCH, or CSI-RS in the SBFD symbol in the DL sub-band.

[0158] Case 2 is a case in which UE 200 transmits SRS, PUCCH, PUSCH, or PRACH in the SBFD symbol in the UL sub-band.

[0159] Case 3 is a case in which UE 200 does not receive PDCCH, PDSCH, or CSI-RS in the SBFD symbol in the DL sub-band, and does not transmit SRS, PUCCH, PUSCH, or PRACH in the SBFD symbol in the UL sub-band.

[0160] Case 4 is a case in which UE 200 receives PDCCH, PDSCH, or CSI-RS in SBFD symbols in the DL sub-band, and transmits SRS, PUCCH, PUSCH, or PRACH in SBFD symbols in the UL sub-band.

[0161] A specific method for directional collision handling is shown in FIGS.

[0162] As shown in FIG. 9, six cases are assumed for Case 1 depending on the types of symbols in other cells.

[0163] In Case 1-1, the symbol of the other cell is Semi-SFI DL, and no collision occurs in this case.

[0164] In Case 1-2, the symbols of the other cells are Semi-SFI UL. In such a case, UE 200 may assume that the symbols of the other cells are Flexible (Option 1-2a), may not receive PDCCH / PDSCH / CSI-RS in the reference cell (Option 1-2b), or may not assume Case 1-2 (Option 1-2c).

[0165] In Cases 1-3, the symbols of other cells are Semi-SFI DLs configured for DL ​​reception by RRC, and no collision occurs in these cases.

[0166] In Case 1-4, the symbol of the other cell is a Semi-SFI UL for which UL transmission is configured by RRC. In such a case, UE 200 may not transmit PUSCH / PUCCH / PRACH / SRS in the other cell (Option 1-4a), may not receive PDCCH / PDSCH / CSI-RS in the reference cell (Option 1-4b), and may not assume Case 1-4 (Option 1-4c).

[0167] In Cases 1-5, the symbols of other cells are Semi-SFI DLs scheduled for DL ​​reception by DCI, and no collision occurs in these cases.

[0168] In Case 1-6, the symbol of another cell is a Semi-SFI DL whose UL transmission is scheduled by DCI. In such a case, UE 200 may not transmit PUSCH / PUCCH / PRACH / SRS in another cell (Option 1-6a), may not receive PDCCH / PDSCH / CSI-RS in the reference cell (Option 1-6b), and may not assume Case 1-6 (Option 1-6c).

[0169] As shown in FIG. 9, six cases are assumed for Case 2 depending on the types of symbols in other cells.

[0170] In Case 2-1, the symbols of the other cells are Semi-SFI DL. In such a case, UE 200 may assume that the symbols of the other cells are Flexible (Option 2-1a), may not transmit PUSCH / PUCCH / PRACH / SRS in the reference cell (Option 2-1b), or may not assume Case 2-1 (Option 2-1c).

[0171] In Case 2-2, the symbol of the other cell is Semi-SFI UL, and no collision occurs in this case.

[0172] In Case 2-3, the symbols of the other cells are Semi-SFI DL in which DL reception is configured by RRC. In such a case, UE 200 may not receive PDCCH / PDSCH / CSI-RS in the other cells (Option 2-3a), may not transmit PUSCH / PUCCH / PRACH / SRS in the reference cell (Option 2-3b), and may not assume Case 2-3 (Option 2-3c).

[0173] In Cases 2-4, the other cell's symbol is a Semi-SFI UL with UL transmission configured by RRC, and no collision occurs in these cases.

[0174] In Case 2-5, the symbols of other cells are Semi-SFI DLs scheduled for DL ​​reception by DCI. In such a case, UE 200 may not receive PDCCH / PDSCH / CSI-RS in other cells (Option 2-5a), may not transmit PUSCH / PUCCH / PRACH / SRS in the reference cell (Option 2-5b), and may not assume Case 2-5 (Option 2-5c).

[0175] In Cases 2-6, the symbols of other cells are Semi-SFI DLs whose UL transmissions are scheduled by DCI. In such cases, no collision occurs.

[0176] As shown in FIG. 10, in Case 3, the following options are possible, depending on the type of symbol in other cells or regardless of the type of symbol in other cells.

[0177] In Option 3a, Case 3 may not be present. For example, SBFD symbols for which DL reception or UL transmission is not configured by RRC may be excluded in the Reference cell determination (first procedure or second procedure).

[0178] In Option 3b, Case 3 exists, but UE 200 may assume that no collision occurs.

[0179] In Option 3c, the UE 200 may follow the same rules as in Case 1 or Case 2.

[0180] In Option 3d, the UE 200 may follow existing rules, assuming that the symbol of the reference cell is a Non-SBFD DL symbol.

[0181] As shown in FIG. 10, in Case 4, the following options are possible, depending on the type of symbol in other cells or regardless of the type of symbol in other cells.

[0182] In Option 4a, Case 4 may not be present. For example, SBFD symbols for which DL reception or UL transmission is not configured by RRC may be excluded in the Reference cell determination (first procedure or second procedure).

[0183] In Option 4b, existing rules may be followed, assuming that the reference cell symbol is a Non-SBFD DL / UL symbol.

[0184] In Option 4c, UE 200 may follow the same rules as Case 1 or Case 2. For example, whether to apply Case 1 or Case 2 may be determined based on the priority used in a case where PDCCH / PDSCH / CSI-RS in the DL sub-band and PUCCH / PUSCH / PRACH / SRS in the UL sub-band overlap in the same SBFD symbol. The priority may be predetermined by wireless communication system 10 or may be set by RRC. For example, Case 2 may be applied when the priority of PUCCH / PUSCH / PRACH / SRS in the UL sub-band set by a higher layer is higher than the priority of PDCCH / PDSCH / CSI-RS in the DL sub-band set by a higher layer. On the other hand, Case 1 may be applied when the priority of PDCCH / PDSCH / CSI-RS in the DL sub-band set by a higher layer is higher than the priority of PUCCH / PUSCH / PRACH / SRS in the UL sub-band set by a higher layer.

[0185] In operation example 4, in addition to the four cases described above, UE 200 does not assume detection of the first DCI format that schedules transmission or reception in the SBFD symbol of the first cell, and UE 200 does not assume detection of the first DCI format that schedules transmission or reception in the non-SBFD symbol of the second cell.

[0186] As described above, in the fourth operation example, when it is assumed that the SBFD operation cell is set to apply directional collision handling, the UE 200 determines directional collision handling according to the conditions. The conditions are the conditions defined in the above-mentioned options and alternatives (see, for example, FIGS. 9 and 10 ).

[0187] (5.5) Operation Example 5 In Operation Example 5, a case will be described in which directional collision handling for half-duplex communication is set when two or more serving cells include at least one SBFD operation cell. That is, Operation Example 5 may be considered to be an operation example based on Options 2-3 of Operation Example 2 described above.

[0188] In Operation Example 5, the third procedure for determining how to handle collisions (Directional Collision Handling method) corresponding to the symbol of the reference cell and the symbol of another cell will be mainly described. In Operation Example 5, the case where the symbol of the reference cell is a Non-SBFD symbol and the symbol of another cell is an SBFD symbol will be described.

[0189] In the fifth operational example, the directional collision handling method may be determined based on the SBFD symbol of another cell (SBFD operation cell) from the following viewpoints.

[0190] Case 5 is a case in which UE 200 receives PDCCH, PDSCH, or CSI-RS in the SBFD symbol in the DL sub-band.

[0191] Case 6 is a case in which UE 200 transmits SRS, PUCCH, PUSCH, or PRACH in the SBFD symbol in the UL sub-band.

[0192] Case 7 is a case in which UE 200 does not receive PDCCH, PDSCH, or CSI-RS in the SBFD symbol in the DL sub-band, and does not transmit SRS, PUCCH, PUSCH, or PRACH in the SBFD symbol in the UL sub-band.

[0193] Case 8 is a case in which UE 200 receives PDCCH, PDSCH, or CSI-RS in the SBFD symbol in the DL sub-band, and transmits SRS, PUCCH, PUSCH, or PRACH in the SBFD symbol in the UL sub-band.

[0194] Case 9 is the case where a Dynamic UL transmission is scheduled in the SBFD symbol.

[0195] Case 10 is the case where Dynamic DL reception is scheduled in the SBFD symbol.

[0196] A specific method for directional collision handling is shown in FIGS.

[0197] As shown in FIG. 11, four cases are assumed for Case 5 depending on the type of symbol of the reference cell.

[0198] In Case 5-1, the symbol of the reference cell is Semi-SFI DL. In such a case, no collision occurs.

[0199] In Case 5-2, the symbol of the reference cell is Semi-SFI UL. In such a case, UE 200 does not need to receive PDCCH / PDSCH / CSI-RS in other cells (Option 5-2a), and does not need to assume Case 5-2 (Option 5-2b).

[0200] In Case 5-3, the symbol of the reference cell is a Semi-SFI DL with DL reception set by RRC, and no collision occurs in this case.

[0201] In Case 5-4, the symbol of the reference cell is a Semi-SFI DL in which UL reception is configured by RRC. In such a case, UE 200 does not need to receive PDCCH / PDSCH / CSI-RS in other cells (Option 5-4a), and does not need to assume Case 5-4 (Option 5-4b).

[0202] As shown in FIG. 11, four cases are assumed for Case 6 depending on the type of symbol of the reference cell.

[0203] In Case 6-1, the symbol of the reference cell is Semi-SFI DL. In such a case, UE 200 does not need to transmit PUSCH / PUCCH / PRACH / SRS in other cells (Option 6-1a), and does not need to assume Case 6-1 (Option 6-1b).

[0204] In Case 6-2, the symbol of the reference cell is Semi-SFI UL. In such a case, no collision occurs.

[0205] In Case 6-3, the symbol of the reference cell is a Semi-SFI DL in which DL reception is configured by RRC. UE 200 does not need to transmit PUSCH / PUCCH / PRACH / SRS in other cells (Option 6-3a), and does not need to assume Case 6-3 (Option 6-3b).

[0206] In Case 6-4, the symbol of the reference cell is Semi-SFI DL with UL reception configured by RRC, and no collision occurs in this case.

[0207] As shown in FIG. 11, in Case 7, no collision occurs regardless of the type of symbol of the reference cell.

[0208] As shown in FIG. 12, in Case 8, the following options are possible depending on the type of symbol of the reference cell or regardless of the type of symbol of the reference cell.

[0209] In Option 8a, the UE 200 may follow existing rules, assuming that the symbol of the reference cell is a Non-SBFD DL / Flexible / UL symbol.

[0210] In Option 8b, UE 200 may follow the same rules as Case 1 or Case 2. For example, whether to apply Case 1 or Case 2 may be determined based on the priority used in a case where PDCCH / PDSCH / CSI-RS in the DL sub-band and PUCCH / PUSCH / PRACH / SRS in the UL sub-band overlap in the same SBFD symbol. The priority may be predetermined by the wireless communication system 10 or may be set by RRC. For example, Case 1 may be applied when the priority of PDCCH / PDSCH / CSI-RS in the DL sub-band set by a higher layer is higher than the priority of the SBFD symbol. On the other hand, Case 2 may be applied when the priority of PUCCH / PUSCH / PRACH / SRS in the UL sub-band set by a higher layer is higher than the priority of the SBFD symbol.

[0211] As shown in FIG. 12, four cases are assumed for Case 9 depending on the type of symbol of the reference cell.

[0212] In Case 9-1, the symbol of the reference cell is Semi-SFI DL. In such a case, UE 200 may not transmit PUSCH / PUCCH / PRACH / SRS in other cells (Option 9-1a), may not receive PDCCH / PDSCH / CSI-RS in the reference cell, or may assume that the symbol of the reference cell is Flexible (Option 9-1b), or may not assume Case 9-1 (Option 9-1c).

[0213] In Case 9-2, the symbol of the reference cell is Semi-SFI UL. In such a case, no collision occurs.

[0214] In Case 9-3, the symbol of the reference cell is a Semi-SFI DL in which DL reception is configured by RRC. UE 200 may not transmit PUSCH / PUCCH / PRACH / SRS in other cells (Option 9-3a), may not receive PDCCH / PDSCH / CSI-RS in the reference cell (Option 9-3b), and may not assume Case 9-3 (Option 9-3c).

[0215] In Case 9-4, the symbol of the reference cell is Semi-SFI DL with UL reception configured by RRC, and no collision occurs in this case.

[0216] As shown in FIG. 12, four cases are assumed for Case 10 depending on the type of symbol of the reference cell.

[0217] In Case 10-1, the symbol of the reference cell is Semi-SFI DL. In such a case, no collision occurs.

[0218] In Case 10-2, the symbol of the reference cell is Semi-SFI UL. In such a case, UE 200 may not receive PDCCH / PDSCH / CSI-RS in other cells (Option 10-2a), may not transmit PUSCH / PUCCH / PRACH / SRS in the reference cell, or may assume that the symbol of the reference cell is Flexible (Option 10-2b), or may not assume Case 10-2 (Option 10-2c).

[0219] In Case 10-3, the symbol of the reference cell is a Semi-SFI DL for which DL reception is set by RRC. In such a case, no collision occurs.

[0220] In Case 10-4, the symbol of the reference cell is a Semi-SFI UL for which UL reception is configured by RRC. In such a case, UE 200 does not need to transmit PUSCH / PUCCH / PRACH / SRS in the reference cell (Option 10-4a), does not need to receive PDCCH / PDSCH / CSI-RS in other cells (Option 10-4b), and does not need to assume Case 10-4 (Option 10-4c).

[0221] In operation example 5, in addition to the six cases described above, UE 200 does not assume detection of the first DCI format that schedules transmission or reception in the SBFD symbol of the first cell, and UE 200 does not assume detection of the first DCI format that schedules transmission or reception in the non-SBFD symbol of the second cell.

[0222] As described above, in the fifth operation example, when it is assumed that the SBFD operation cell is set to apply directional collision handling, the UE 200 determines directional collision handling according to the conditions. The conditions are the conditions defined in the above-mentioned options and alternatives (see, for example, FIGS. 11 and 12 ).

[0223] (5.6) Operation Example 6 In Operation Example 6, a case will be described in which directional collision handling for half-duplex communication is set when two or more serving cells include at least one SBFD operation cell. That is, Operation Example 6 may be considered to be an operation example based on Options 2-3 of Operation Example 2 described above.

[0224] In Operation Example 6, the third procedure for determining how to handle collisions (Directional Collision Handling method) corresponding to the symbol of the reference cell and the symbol of another cell will be mainly described. In Operation Example 6, the case where the symbol of the reference cell is an SBFD symbol and the symbol of another cell is an SBFD symbol will be described.

[0225] In the sixth operational example, the directional collision handling method may be determined based on the SBFD symbol of the reference cell (SBFD operation cell) from the following viewpoints.

[0226] Case 11 is a case in which UE 200 receives PDCCH, PDSCH, or CSI-RS in the SBFD symbol in the DL sub-band.

[0227] Case 12 is a case in which UE 200 transmits SRS, PUCCH, PUSCH, or PRACH in the SBFD symbol in the UL sub-band.

[0228] Case 13 is a case in which UE 200 does not receive PDCCH, PDSCH, or CSI-RS in the SBFD symbol in the DL sub-band, and does not transmit SRS, PUCCH, PUSCH, or PRACH in the SBFD symbol in the UL sub-band.

[0229] Case 14 is a case in which UE 200 receives PDCCH, PDSCH, or CSI-RS in the SBFD symbol in the DL sub-band, and transmits SRS, PUCCH, PUSCH, or PRACH in the SBFD symbol in the UL sub-band.

[0230] A specific method for directional collision handling is shown in FIGS.

[0231] As shown in FIG. 13, five cases are assumed for Case 11 depending on the types of symbols in other cells.

[0232] In Case 11-1, the symbol of another cell is an SBFD symbol for which DL reception is set by RRC within the DL sub-band, and no collision occurs in this case.

[0233] Case 11-2 is a case where the symbol of another cell is an SBFD symbol for which UL transmission is configured by RRC in the UL sub-band. In such a case, UE 200 does not need to transmit PUSCH / PUCCH / PRACH / SRS in another cell (Option 11-2a), and does not need to assume Case 11-2 (Option 11-2b).

[0234] In Case 11-3, the symbol of another cell is an SBFD symbol configured by RRC for DL ​​reception in the DL sub-band and UL transmission in the UL sub-band simultaneously. In such a case, UE 200 may follow the same rule as Case 11-1 or Case 11-2. For example, whether to apply Case 11-1 or Case 11-2 may be determined based on the priority used in a case where the PDCCH / PDSCH / CSI-RS in the DL sub-band and the PUCCH / PUSCH / PRACH / SRS in the UL sub-band overlap in the same SBFD symbol. The priority may be predetermined by the wireless communication system 10 or may be configured by RRC. For example, Case 11-1 may be applied when the priority of the PDCCH / PDSCH / CSI-RS in the DL sub-band configured by a higher layer is higher than the priority of the SBFD symbol. On the other hand, if the priority of PUCCH / PUSCH / PRACH / SRS in the UL-Sub-band set by a higher layer is higher than the priority of the SBFD symbol, Case 11-2 may be applied.

[0235] In Case 11-4, the symbol of another cell is an SBFD symbol scheduled for DL ​​reception by DCI, and no collision occurs in this case.

[0236] In Case 11-5, the symbol of the other cell is an SBFD symbol whose UL transmission is scheduled by DCI. In such a case, the reference cell does not need to receive PDCCH / PDSCH / CSI-RS (Option 11-5a), the other cell does not need to transmit PUSCH / PUCCH / PRACH / SRS (Option 11-5b), and Case 11-5 does not need to be assumed (Option 11-5c).

[0237] As shown in FIG. 13, five cases are assumed for Case 12 depending on the types of symbols in other cells.

[0238] Case 12-1 is a case where the symbol of another cell is an SBFD symbol for which DL reception is configured by RRC in the DL sub-band. In such a case, UE 200 does not need to receive PDCCH / PDSCH / CSI-RS in another cell (Option 12-1a), and does not need to assume Case 12-1 (Option 12-1b). Case 12-2 is a case where the symbol of another cell is an SBFD symbol for which UL transmission is configured by RRC in the UL sub-band. In such a case, no collision occurs.

[0239] In Case 11-4, the symbol of another cell is an SBFD symbol configured by RRC for DL ​​reception in the DL sub-band and UL transmission in the UL sub-band simultaneously. In such a case, UE 200 may follow the same rule as Case 12-1 or Case 12-2. For example, whether to apply Case 12-1 or Case 12-2 may be determined based on the priority used in a case where the PDCCH / PDSCH / CSI-RS in the DL sub-band and the PUCCH / PUSCH / PRACH / SRS in the UL sub-band overlap in the same SBFD symbol. The priority may be predetermined by the wireless communication system 10 or may be configured by RRC. For example, Case 12-1 may be applied when the priority of the PDCCH / PDSCH / CSI-RS in the DL sub-band configured by a higher layer is higher than the priority of the SBFD symbol. On the other hand, if the priority of PUCCH / PUSCH / PRACH / SRS in the UL-Sub-band set by a higher layer is higher than the priority of the SBFD symbol, Case 12-2 may be applied.

[0240] In Case 12-4, the symbol of another cell is an SBFD symbol scheduled for DL ​​reception by DCI. In such a case, the reference cell does not need to transmit PUSCH / PUCCH / PRACH / SRS (Option 12-4a), the other cell does not need to receive PDCCH / PDSCH / CSI-RS (Option 12-4b), and Case 12-4 does not need to be assumed (Option 12-4c).

[0241] In Case 12-5, the symbol of another cell is an SBFD symbol scheduled for UL transmission by DCI, in which case there is no collision.

[0242] As shown in FIG. 14, in Case 13, the following options are possible, depending on the type of symbol in other cells or regardless of the type of symbol in other cells.

[0243] In Option 13a, Case 13 may not be present. For example, SBFD symbols for which DL reception or UL transmission is not configured by RRC may be excluded in Reference cell determination (first procedure or second procedure).

[0244] In Option 13b, Case 13 exists, but UE 200 may assume that no collision occurs.

[0245] In Option 13c, UE 200 may follow the same rules as in Case 11 or Case 12.

[0246] As shown in FIG. 14, in Case 14, the following options are possible, depending on the type of symbol in other cells or regardless of the type of symbol in other cells.

[0247] In Option 14a, Case 14 may not be present. For example, an SBFD symbol for which DL reception or UL transmission is not configured by RRC may be excluded in the Reference cell determination (first procedure or second procedure).

[0248] In Option 14b, UE 200 may follow the same rules as Case 11 or Case 12. For example, whether to apply Case 11 or Case 12 may be determined based on the priority used in a case where the PDCCH / PDSCH / CSI-RS in the DL sub-band and the PUCCH / PUSCH / PRACH / SRS in the UL sub-band overlap in the same SBFD symbol. The priority may be predetermined by the wireless communication system 10 or may be set by RRC. For example, Case 11 may be applied when the priority of the PDCCH / PDSCH / CSI-RS in the DL sub-band set by a higher layer is higher than the priority of the SBFD symbol. On the other hand, Case 12 may be applied when the priority of the PUCCH / PUSCH / PRACH / SRS in the UL sub-band set by a higher layer is higher than the priority of the SBFD symbol.

[0249] In operation example 6, in addition to the four cases described above, UE 200 does not assume detection of the first DCI format that schedules transmission or reception in the SBFD symbol of the first cell, and UE 200 does not assume detection of the first DCI format that schedules transmission or reception in the non-SBFD symbol of the second cell.

[0250] As described above, in Operation Example 6, when it is assumed that the SBFD operation cell is set to apply directional collision handling, UE 200 determines directional collision handling according to a condition. The condition is a condition defined by the above-mentioned Option and Alt. (see, for example, FIGS. 13 and 14 ).

[0251] (6) Actions and Effects In the embodiment, the UE 200 considers whether to configure directional collision handling when two or more serving cells include an SBFD operation cell. According to this configuration, when two or more serving cells include an SBFD operation cell, the operation related to directional collision handling is clarified, and therefore, appropriate communication can be performed in SBFD.

[0252] (7) Other Embodiments The contents of the present invention have been described above in accordance with the embodiments, but it will be obvious to those skilled in the art that the present invention is not limited to these descriptions and that various modifications and improvements are possible.

[0253] Although not specifically mentioned in the above disclosure, which of Operational Examples 1 to 5 to use (hereinafter, referred to as which aspect to use) may be set by a higher layer parameter. Which of each option or Alt. of Operational Examples 1 to 5 to use (hereinafter, referred to as which aspect to use) may be set by a higher layer parameter. Which aspect to support may be reported from UE 200 as UE capability(ies). Which aspect to use may be defined in advance in wireless communication system 20. Which aspect to use may be set by a higher layer parameter and reported from UE 200 as UE capability(ies).

[0254] Although not particularly limited, the UE capability(ies) may include an information element indicating whether two or more serving cells support including at least one SBFD operation cell.

[0255] Although not particularly limited, the UE capability(ies) may include an information element indicating whether or not the UE supports at least one maximum number (X) of SBFD operation cells included in two or more serving cells. Such an information element may include a value of the maximum number (X).

[0256] Although not particularly limited, the UE capability(ies) may include an information element indicating whether two or more serving cells support including two or more SBFD operation cells.

[0257] Although not particularly limited, the UE capability(ies) may include an information element indicating whether or not the UE supports a maximum number (X) of SBFD operation cells of two or more in two or more serving cells. Such an information element may include a value of the maximum number (X).

[0258] Although not particularly limited, the UE capability(ies) may include an information element indicating whether or not directional collision handling for DL / UL is supported in a non-SBFD operation cell when two or more serving cells include at least one SBFD operation cell.

[0259] Although not particularly limited, the UE capability(ies) may include an information element indicating whether or not the SBFD operation cell supports DL / UL collision handling (directional collision handling) when two or more serving cells include at least one SBFD operation cell.

[0260] Although not particularly limited, the UE capability(ies) may include an information element indicating whether or not directional collision handling for DL / UL is supported in a non-SBFD operation cell and an SBFD operation cell when two or more serving cells include at least one SBFD operation cell.

[0261] Although not particularly limited, the UE capability(ies) may include an information element indicating whether or not to support existing higher layer parameters (e.g., directionalCollisionHandling-r16 or directionalCollisionHandling-DC-r17) when two or more serving cells include at least one or more SBFD operation cells.

[0262] Although not particularly limited, the UE capability(ies) may include an information element indicating whether or not to support existing higher layer parameters (e.g., directionalCollisionHandling-r16 or directionalCollisionHandling-DC-r17) configured for the SBFD operation cell when two or more serving cells include at least one or more SBFD operation cells.

[0263] Although not particularly limited, the UE capability(ies) may include an information element indicating whether or not a newly introduced higher layer parameter (e.g., directionalCollisionHandling-SBFD-CA-r19) for an SBFD operation cell is supported when two or more serving cells include at least one SBFD operation cell.

[0264] Although not particularly limited, the UE capability(ies) may include an information element indicating whether or not directional collision handling is supported using the SBFD operation cell as the reference cell when two or more serving cells include at least one SBFD operation cell.

[0265] Although not particularly limited, the UE capability(ies) may include an information element indicating whether directional collision handling is supported when two or more serving cells include at least one SBFD operation cell and the symbol is an SBFD symbol.

[0266] In the above disclosure, 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.

[0267] Furthermore, specific, dedicated, UE-specific, and UE-dedicated may be interchangeable. Similarly, common, shared, group-common, UE-common, and UE-shared may be interchangeable.

[0268] The block diagrams (FIGS. 4 and 5) used to explain the above-described embodiments show 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.

[0269] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, regard, 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.

[0270] 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 15 is a diagram showing an example of the hardware configuration of the devices. As shown in Figure 15, the devices may be configured as a computer 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.

[0271] 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.

[0272] Each functional block of the device (see FIGS. 4 and 5) is realized by any hardware element of the computer device or a combination of the hardware elements.

[0273] 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.

[0274] 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.

[0275] 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 one 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.

[0276] 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.

[0277] 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.

[0278] 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.

[0279] 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).

[0280] 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).

[0281] 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.

[0282] 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.

[0283] 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.

[0284] 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.

[0285] 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.

[0286] In the present disclosure, a specific operation described as being performed by a base station may, in some cases, be performed by its upper node. It is clear that in a network consisting of one or more network nodes having a base station, 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 (such as, but not limited to, an MME or an S-GW). While the above example illustrates a case in which there is one other network node other than the base station, a combination of multiple other network nodes (such as an MME and an S-GW) may also be used.

[0287] 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 / output via multiple network nodes.

[0288] 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.

[0289] 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).

[0290] 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).

[0291] 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.

[0292] 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.

[0293] 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.

[0294] 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.

[0295] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0296] 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.

[0297] 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.

[0298] 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.

[0299] 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)).

[0300] 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.

[0301] 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.

[0302] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0303] 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.

[0304] 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.

[0305] 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.

[0306] 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.

[0307] A radio frame may be composed of one or more frames in the time domain, each of which may be called a subframe.

[0308] A subframe may further be composed of one or more slots in the time domain, and may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0309] Numerology may be a communication parameter applied to the transmission and / or reception of a signal or channel, and may indicate, for example, at least one of a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a particular filtering operation performed by a transceiver in the frequency domain, a particular windowing operation performed by a transceiver in the time domain, etc.

[0310] A slot may consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) A slot may be a numerology-based time unit.

[0311] A slot may include multiple minislots. Each minislot may consist of one or multiple 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.

[0312] 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.

[0313] 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 referred to as a slot, minislot, etc. instead of a subframe.

[0314] 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.

[0315] 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.

[0316] 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. Furthermore, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0317] A TTI having a time length of 1 ms may be called 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 called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0318] 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.

[0319] 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.

[0320] 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. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0321] 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.

[0322] 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.

[0323] 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.

[0324] 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.

[0325] 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."

[0326] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. 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, etc. may be variously changed.

[0327] 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.

[0328] The reference signal may also be abbreviated as Reference Signal (RS) and may be called a pilot depending on the applicable standard.

[0329] 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."

[0330] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0331] 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.

[0332] 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.

[0333] 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.

[0334] 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.

[0335] 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."

[0336] 16 shows an example of the configuration of a vehicle 2001. As shown in Fig. 16, 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.

[0337] The drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.

[0338] 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.

[0339] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2027 provided in the vehicle. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0340] 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.

[0341] 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.

[0342] 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.

[0343] 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.

[0344] 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.

[0345] 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.

[0346] 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.

[0347] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure.

[0348] (Additional Note) The above disclosure may be expressed as follows.

[0349] A first feature is a terminal including: a communication unit that communicates with a duplex cell that can perform simultaneous communication of an uplink signal and a downlink signal within a time division duplex band; and a control unit that, when two or more serving cells include the duplex cell, determines whether or not to set a method for dealing with collisions related to the uplink signal and the downlink signal.

[0350] A second feature is that, in the terminal of the first feature, the control unit assumes that the application of the collision handling method is not set in the duplexed cell, or that the application of the collision handling method is set in the duplexed cell.

[0351] A third feature is a terminal in which, in the first or second feature, the control unit determines at least one of the collision handling methods corresponding to the reference cell and the symbol of the reference cell according to a condition when it is assumed that the collision handling method is set to be applied in the duplexed cell.

[0352] A fourth feature is a base station including: a communication unit that communicates with a terminal via a duplex cell that can perform simultaneous communication of an uplink signal and a downlink signal within a time division duplex band; and a control unit that, when two or more serving cells include the duplex cell, determines whether to set a method for dealing with collisions between the uplink signal and the downlink signal.

[0353] A fifth feature is a wireless communication system including a terminal and a base station, wherein the terminal includes a communication unit that communicates with a duplex cell that can perform simultaneous communication of an uplink signal and a downlink signal within a time division duplex band, and a control unit that, when two or more serving cells include the duplex cell, determines whether to set application of a collision prevention method for the uplink signal and the downlink signal.

[0354] A sixth feature is a wireless communication method including: a step A of communicating with a duplex cell that can perform simultaneous communication of an uplink signal and a downlink signal within a time division duplex band; and a step B of assuming whether or not a setting is made to apply a collision prevention method for the uplink signal and the downlink signal when two or more serving cells include the duplex cell.

[0355] 10 Wireless communication system 20 NG-RAN 100 gNB 110 Receiving unit 120 Transmitting unit 130 Control unit 200 UE 210 Radio signal transmitting / receiving unit 220 Amplifying unit 230 Modulation / demodulation unit 240 Control signal / reference signal processing unit 250 Encoding / decoding unit 260 Data transmitting / receiving unit 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 communicates with a duplex cell that can perform simultaneous communication of uplink signals and downlink signals within a time division duplex band; and a control unit that, when two or more serving cells include the duplex cell, determines whether or not to set a method for dealing with collisions regarding the uplink signals and the downlink signals.

2. The terminal according to claim 1, wherein the control unit assumes that the application of the collision handling method is not set in the duplexed duplex cell, or assumes that the application of the collision handling method is set in the duplexed duplex cell.

3. The terminal according to claim 1, wherein the control unit determines at least one of the procedure for determining the reference cell and the collision handling method in accordance with conditions when it is assumed that the collision handling method is set to be applied in the duplexed cell.

4. A base station comprising: a communication unit that communicates with a terminal via a duplex cell that can perform simultaneous communication of uplink signals and downlink signals within a time division duplex band; and a control unit that determines whether to set the application of a collision prevention method for the uplink signals and the downlink signals when two or more serving cells include the duplex cell.

5. A wireless communication system comprising a terminal and a base station, wherein the terminal comprises: a communication unit that communicates with a duplex cell capable of simultaneous communication of uplink signals and downlink signals within a time division duplex band; and a control unit that, when two or more serving cells include the duplex cell, determines whether or not to set a method for dealing with collisions regarding the uplink signals and the downlink signals.

6. A wireless communication method comprising: step A of communicating with a duplex cell capable of simultaneous communication of uplink signals and downlink signals within a time division duplex band; and step B of determining whether or not a setting is made to apply a collision prevention method for the uplink signals and the downlink signals when two or more serving cells include the duplex cell.

Images