Terminal and communication method

Abstract

To provide a terminal that supports half-duplex TDD CA operation, and SBFD operation on one cell and can appropriately measure downlink signals.SOLUTION: A terminal includes a communication unit that communicates in multiple cells using half-duplex time division duplex, and a control unit that determines a reference cell from the multiple cells for each symbol for directional collision processing. One of the multiple cells is capable of simultaneous communication of an uplink signal and a downlink signal, and the control unit controls measurement of the downlink signal in the reference cell or the other cells other than the reference cell.SELECTED DRAWING: Figure 22

Description

[Technical Field]

[0001] The present disclosure relates to a terminal and a communication method. [Background technology]

[0002] The 3rd Generation Partnership Project (3GPP (registered trademark)) has developed specifications for the 5th generation mobile communication system (also known as 5G, 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). [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] "New SI: Study on evolution of NR duplex operation", RP-213591, 3GPP TSG RAN#94-e, 3GPP, December 2021 Summary of the Invention

[0005] There is insufficient research into downstream signal measurements when supporting half-duplex TDD CA operation and SBFD operation on one cell.

[0006] There is insufficient consideration of communications when half-duplex TDD CA operation and SBFD operation on one cell are supported and collision handling is performed.

[0007] One aspect of the present disclosure is to provide a terminal that supports half-duplex TDD CA operation and SBFD operation on one cell and can appropriately perform measurements on downlink signals.

[0008] One aspect of the present disclosure is to provide a terminal that supports half-duplex TDD CA operation and SBFD operation on one cell and can appropriately perform communication when collision processing is performed. [Means for solving the problem]

[0009] A terminal according to one embodiment of the present disclosure includes a communication unit that communicates in a plurality of cells using half-duplex time division duplexing, and a control unit that determines a reference cell from among the plurality of cells for each symbol for directional collision processing, wherein one of the plurality of cells is a cell capable of simultaneous communication of uplink signals and downlink signals, and the control unit controls measurement of link-to-link interference in the reference cell or other cells other than the reference cell.

[0010] A terminal according to one embodiment of the present disclosure includes a communication unit that communicates using half-duplex time division duplex in multiple cells, and a control unit that determines a reference cell from the multiple cells for each symbol for directional collision processing, wherein one cell among the multiple cells is a cell capable of simultaneous communication of uplink signals and downlink signals, and the control unit controls uplink or downlink symbols between the reference cell and cells other than the reference cell. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram illustrating an overall schematic configuration of a wireless communication system. [Figure 2] FIG. 1 illustrates frequency ranges used in wireless communication systems. [Figure 3] 1A to 1C are diagrams illustrating examples of the configuration of radio frames, subframes, slots, and symbols used in a radio communication system. [Figure 4] FIG. 1 is a diagram illustrating SBFD operation. [Figure 5] FIG. 1 is a diagram illustrating SBFD operation. [Figure 6] FIG. 1 is a diagram illustrating UE capabilities. [Figure 7] FIG. 1 is a diagram illustrating UE capabilities. [Figure 8] FIG. 10 is a diagram illustrating parameters for setting directional collision processing. [Figure 9] FIG. 10 is a diagram for explaining determination of a reference cell. [Figure 10] FIG. 10 is a diagram for explaining determination of a reference cell. [Figure 11] FIG. 10 is a diagram illustrating an example of a procedure for determining a reference cell. [Figure 12] FIG. 10 is a diagram illustrating an example of a procedure for determining a reference cell. [Figure 13] FIG. 1 is a diagram illustrating half-duplex CA operation of a UE. [Figure 14] FIG. 1 is a diagram illustrating half-duplex CA operation of a UE. [Figure 15] FIG. 10 is a diagram illustrating directional collision processing when an SBFD operating cell is included. [Figure 16] FIG. 1 is a diagram illustrating Proposal 1. [Figure 17] FIG. 1 is a diagram illustrating Proposal 1. [Figure 18] FIG. 10 is a diagram illustrating Proposal 2. [Figure 19] FIG. 10 is a diagram illustrating Proposal 3. [Figure 20] FIG. 10 is a diagram illustrating Proposal 4. [Figure 21] FIG. 2 is a block diagram showing an example of the configuration of a base station according to the present embodiment. [Figure 22] FIG. 2 is a block diagram showing an example of the configuration of a UE according to the present embodiment. [Figure 23]FIG. 2 is a diagram illustrating an example of a hardware configuration of a base station and a terminal according to the present embodiment. [Figure 24] FIG. 1 is a diagram illustrating an example of a configuration of a vehicle. DETAILED DESCRIPTION OF THE INVENTION

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

[0013] <Wireless communication system configuration> 1 is a wireless communication system conforming to a scheme called 5G. Alternatively, the wireless communication system 10 may be a wireless communication system conforming to a scheme called Beyond 5G, 5G Evolution, or 6G.

[0014] The wireless communication system 10 can support Massive Multiple-Input Multiple-Output (Massive MIMO), which generates more directional beams by controlling wireless signals transmitted from multiple antenna elements, Carrier Aggregation (CA), which uses multiple component carriers (CCs) as a bundle, and Dual Connectivity (DC), which communicates simultaneously with two base stations.

[0015] As shown in FIG. 1, a wireless communication system 10 includes a base station 100 (hereinafter also referred to as a gNodeB (gNB) 100) constituting a Next Generation-Radio Access Network (NG-RAN) 20, and a terminal 200 (hereinafter also referred to as a user equipment (UE) 200) that performs wireless communication with the base station 100. The NG-RAN 20 is connected to a core network (CN) (not shown). The CN is composed of multiple network functions (NFs). The NFs are, for example, an access and mobility management function (AMF) and a network data analytics function (NWDAF). The AMF performs, for example, registration of the terminal 200. The NWDAF performs, for example, optimization of the CN. Note that the specific configuration of the wireless communication system 10, for example, the number of base stations 100 and terminals 200, is not limited to the example shown in FIG. 1. The NG-RAN 20 and the CN may be simply referred to as a "network."

[0016] Base station 100 may be a base station in a Centralized-Radio Access Network (C-RAN) configuration having a distributed unit (DU) having a function for connecting to terminal 200 and a central unit (CU) having a function for connecting to a network. In this case, base station 100 may be read as a DU, a CU, or both a DU and a CU. When base station 100 is read as a DU, it may be called a gNB-DU. When base station 100 is read as a CU, it may be called a gNB-CU. When base station 100 is read as a DU and a CU, the DU portion may be called a gNB-DU and the CU portion may be called a gNB-CU.

[0017] Furthermore, the wireless communication system 10 may support a plurality of frequency ranges (FRs). That is, as shown in FIG. 2, the wireless communication system 10 may support the following FRs: FR1: 410MHz~7.125GHz FR2-1: 24.25GHz~52.6GHz ·FR2-2: More than 52.6GHz~71GHz

[0018] In FR1, a subcarrier spacing (SCS) of 15, 30, or 60 kHz and a bandwidth (BW) of 5 to 100 MHz may be used, and in FR2-1, an SCS of 60 or 120 kHz (or 240 kHz) and a BW of 50 to 400 MHz may be used.

[0019] Note that the SCS may be interpreted as a numerology, which is defined in 3GPP TS 38.300 and corresponds to one subcarrier spacing in the frequency domain.

[0020] In FR2-2, to avoid an increase in phase noise, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) or Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) with a larger SCS may be applied.

[0021] Fig. 3 is a diagram showing an example of the configuration of a radio frame (system frame), subframe, and slot used in the radio communication system 10. As shown in Fig. 3, one slot is made up of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period). However, the SCS is not limited to the interval (frequency) shown in Fig. 3. For example, 480 kHz, 960 kHz, etc. may be used as the SCS.

[0022] Furthermore, the number of symbols constituting one slot does not necessarily have to be 14 (for example, it may be 28 or 56 symbols, etc.) Furthermore, the number of slots per subframe may differ depending on the SCS.

[0023] 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.

[0024] The wireless communication system 10 may support coverage enhancement (CE) that expands the coverage of a cell (or a physical channel) formed by the gNB 100. In coverage enhancement, a mechanism for increasing the success rate of reception of various physical channels, such as repeated transmission (repetition) of a physical random access channel (PRACH), may be provided.

[0025] For example, terminal 200 receives information related to the random access procedure from base station 100 as a downlink (DL) signal (for example, SIB1 (System Information Block Type 1) or the like).

[0026] Furthermore, for example, terminal 200 transmits a PRACH as an UL signal to base station 100 using a RACH occasion (RO) or the like, which is a resource for transmitting a random access preamble. For example, terminal 200 repeatedly transmits the PRACH as an UL signal to base station 100.

[0027] The UL signal may include, for example, a UL data signal and control information. For example, the UL signal may include information related to the processing capabilities of terminal 200 (e.g., UE capability). The UL signal may also include a reference signal.

[0028] Channels used for transmitting UL signals include, for example, data channels and control channels. For example, the data channels may include a Physical Uplink Shared Channel (PUSCH), and the control channels may include a Physical Uplink Control Channel (PUCCH). For example, terminal 200 transmits control information using the PUCCH and transmits UL data signals using the PUSCH. Note that the PUSCH is an example of an uplink shared channel, and the PUCCH is an example of an uplink control channel. The shared channels may also be called data channels.

[0029] The reference signal included in the UL signal may include at least one of, for example, a Demodulation Reference Signal (DMRS), a Phase Tracking Reference Signal (PTRS), a Channel State Information-Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), and a Positioning Reference Signal (PRS) for positioning information. For example, reference signals such as the DMRS and PTRS are used to demodulate the UL data signal and are transmitted using the PUSCH.

[0030] Meanwhile, base station 100 transmits information related to the RACH procedure to terminal 200 as a DL signal (for example, SIB1, etc.) in response to the operation of terminal 200.

[0031] Furthermore, for example, base station 100 receives, as an UL signal, a PRACH from terminal 200. For example, base station 100 repeatedly receives a PRACH from terminal 200 as an UL signal.

[0032] The channels used for transmitting DL signals include, for example, data channels and control channels. For example, the data channels may include a Physical Downlink Shared Channel (PDSCH), and the control channels may include a Physical Downlink Control Channel (PDCCH). For example, the base station 100 transmits control information to the terminal 200 using the PDCCH and transmits DL data signals using the PDSCH. Note that the PDSCH is an example of a downlink shared channel, and the PDCCH is an example of a downlink control channel. Note that the PDCCH may be rewritten with downlink control information (DCI), control information, etc. transmitted in the PDCCH.

[0033] The reference signals included in the DL signal may include, for example, at least one of DMRS, PTRS, CSI-RS, SRSRS, and PRS for position information. For example, reference signals such as DMRS and PTRS are used for demodulating DL data signals and are transmitted using the PDSCH.

[0034] <UEs Supporting SBFD and UEs Not Supporting SBFD> In 3GPP, a technical report on SBFD operation has been released (see Figure 4). The SBFD operation within the TDD carrier is studied, and the SBFD method within a single configuration of DL and UL BWP pairs with the same center frequency is taken as the baseline (see Figures 4 and 5).

[0035] Options 1 to 4 have been reported for SBFD operation (see Figure 4). Option 4 for SBFD operation reports the existence of SBFD-capable UE and SBFD-non-capable UE. In other words, in a 3GPP wireless network, SBFD-capable UE and SBFD-non-capable UE may exist. For an SBFD-capable UE, the time and frequency location of the subband for SBFD operation is known. An SBFD-capable UE can communicate in a duplex cell (SBFD operation cell) that can perform simultaneous communication of UL signals and DL signals within a time division duplex band. UE behavior for a SBFD-non-capable UE follows existing specifications.

[0036] From the perspective of RAN1, new UE behavior may be introduced for SBFD-capable UEs based on the time and frequency location of the subbands for SBFD operation. Of the four options, Option 4 for SBFD operation is agreed upon as the baseline for SBFD operation, at least for the RRC_CONNECTED state.

[0037] <Half-duplex CA operation 1> Rel-18 / 19 specifies gNB side SBFD enhancements. The base station side can transmit in DL on one sub-band and receive in UL on another sub-band. The UE side operates in half duplex mode.

[0038] Apart from SBFD, half-duplex operation of UE in TDD carrier aggregation (CA) scenarios was also discussed. · The UE cannot simultaneously receive and transmit within the serving cell or between cells in the same frequency band. Depending on the UE capability, the UE may or may not be able to simultaneously receive and transmit between cells in different frequency bands (see FG 2-5, Figure 6).

[0039] In Rel-16, directional collision handling was introduced for half-duplex TDD CA UEs, for UEs that cannot simultaneously Tx / Rx between cells. FG 14-5 has been introduced to define UE capabilities for directional collision handling for half duplex TDD CA operation (see Figure 7). For UEs reporting FG 14-5, the base station can configure the parameter “directionalCollisionHandling-r16” in higher layers such as RRC per serving cell (see Figure 8). If the UE cannot perform simultaneous Tx / Rx and cannot handle directional conflicts between multiple cells, the network will ensure that all serving cells have the same direction. For example, if the UE reports that it cannot perform simultaneous Tx / Rx and that it cannot handle directional conflicts, the network (base station) will ensure that all serving cells have the same direction. In other words, the network ensures that all serving cells have the same direction for UEs that do not support simultaneous Tx / Rx and directional conflicts.

[0040] <Half-duplex CA operation 2> In half-duplex CA operation, cells are divided into a reference cell and another cell that is not a reference cell for half-duplex CA operation. A UE can determine a reference cell (see Figure 9) if it reports support for the "half-DuplexTDD-CA-SameSCS-r16" capability (see Figure 7) and the parameter "directionalCollisionHandling-r16" (see Figure 8) is set.

[0041] The reference cell is determined for each symbol. In determining the reference cell, only symbols designated as semi-static SFI D / U and symbols designated as semi-static F with DL reception or UL transmission configured by higher layers are considered (see Figures 9 and 10). In other words, if a symbol is designated as semi-static F on a cell and DL or UL is not configured for that symbol by higher layers, that cell is not considered in determining the reference cell for that symbol. Note that SFI stands for Slot Format Indicator, D stands for Downlink, U stands for Uplink, and F stands for Flexible. For details on reference cell determination, see Figures 9 and 10.

[0042] FIG. 11 shows an example of a procedure for determining a reference cell. In step 1, the UE determines a set of cells that can be considered for determining a reference cell. In step 2, the UE determines a reference cell from the set of cells obtained in step 1. In step 3, the UE performs directional collision processing between the reference cell and other cells. The directional collision processing will be described in <Half-Duplex CA Operation 3> below.

[0043] Fig. 12 is a diagram showing an example of a procedure for determining a reference cell. Fig. 12 shows a CA consisting of CC (Component Carriers) #1 to CC #5. CC #1 is excluded from reference cell determination because the symbol is designated as a semi-static F on the cell and no DL or UL is set for that symbol by a higher layer. Cells that can be considered for reference cell determination are CC #2 to CC #5 (Step 1).

[0044] The UE determines as a reference cell (step 2) the active cell with the smallest cell index from CC#2 to CC#5 (the set of cells) acquired in step 1. In the example of Fig. 12, the UE determines CC#2 as the reference cell.

[0045] <Half-duplex CA operation 3> In section 11.1 of TS 38.213, the operations of the UE after determining the reference cell are specified. In section 11.1 of TS 38.213, the UE operations when another cell is in the same frequency band as the reference cell, when another cell is in a different frequency band from the reference cell, and when another cell is in the same or different frequency band from the reference cell are specified.

[0046] Figures 13 and 14 are diagrams for explaining the half-duplex CA operation of the UE. The explanation shown in Figure 13 continues with the explanation in Figure 14. Before "And if another cell among..." in Figure 13, it is an explanation regarding the determination of the reference cell, which is the same as in Figure 9. After "And if another cell among...", the UE operations when another cell is in the same frequency band as the reference cell, when another cell is in a different frequency band from the reference cell, and when another cell is in the same or different frequency band from the reference cell are specified.

[0047] The UE operations when another cell is in the same frequency band as the reference cell can be divided into three cases: Case1-1, Case1-2, and Case1-3, as shown in Figure 13.

[0048] The UE operations when another cell is in a different frequency band from the reference cell can be divided into three cases: Case2-1, Case2-2, and Case2-3, as shown in Figure 14.

[0049] The UE operations when another cell is in the same or different frequency band from the reference cell can be divided into seven cases: Case3-1, Case3-2, Case3-3, Case3-4, Case3-5, Case3-6, and Case3-7, as shown in Figure 14.

[0050] For details of the UE operations, please refer to Figures 13 and 14.

[0051] <SBFD operation cell> A case where two or more serving cells include at least one SBFD operation cell and directional collision handling for half-duplex communication is configured will be described.

[0052] First, an example of an operation relating to a first procedure for determining a set of cells (reference cell candidates) to be considered in determining a reference cell will be described. As such an example of an operation, the following options are possible.

[0053] In option 1, the UE determines reference cell candidates according to existing rules without considering SBFD symbols and non-SBFD symbols.

[0054] Specifically, the UE determines the reference cell candidates according to existing rules, for example, the UE may treat SBFD symbols and DL symbols without distinction.

[0055] According to Option 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.

[0056] In option 2, the UE determines reference cell candidates without considering SBFD operating cells.

[0057] Specifically, the UE excludes SBFD operating cells and determines reference cell candidates from non-SBFD operating 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 operating cell or a non-SBFD symbol.

[0058] In Option 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 become the reference cell, the priority of the SBFD operation cell is low in the directionality conflict processing.

[0059] In option 3, the UE determines reference cell candidates without considering the SBFD symbol.

[0060] Specifically, the UE determines reference cell candidates for the symbols. In such a case, the symbols may be as follows:

[0061] A symbol is downlink or uplink as specified by an RRC higher layer parameter (parameter signaled by RRC signaling) such as tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated if SBFD UL Sub-band is not configured for the symbol.

[0062] A symbol is uplink if the symbol is Flexible, the SBFD UL Sub-band is not configured for the symbol, and the UE transmits SRS, PUCCH, PUSCH, or PRACH in the symbol.

[0063] A symbol is downlink if the symbol is Flexible, SBFD UL Sub-band is not configured for the symbol, and the UE receives PDCCH, PDSCH, or CSI-RS in the symbol.

[0064] In option 3, if the symbol is an SBFD symbol of an SBFD operating cell, the SBFD operating cell is not considered as a candidate for the reference cell. If the symbol is a Non-SBFD symbol of an SBFD operating cell, the SBFD operating cell is considered as a candidate for the reference cell.

[0065] According to Option 3, reference cell candidates are determined from cells whose symbols are non-SBFD symbols, so existing rules can be reused. Since SBFD operation cells of SBFD symbols cannot become reference cells, the priority of SBFD operation cells is low in directional conflict processing.

[0066] In option 4, the UE determines reference cell candidates without considering the SBFD symbol or by considering the SBFD symbol.

[0067] Specifically, the UE determines whether to take SBFD symbols into consideration when determining reference cell candidates depending on whether PDCCH / PDSCH / CSI-RS (in the DL sub-band) are configured by a higher layer and whether PUCCH / PUSCH / PRACH / SRS (in the UL sub-band) are configured by a higher layer.

[0068] 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:

[0069] Case-a is a case in which the UE transmits PUCCH / PUSCH / PRACH / SRS in symbols (within the UL-Sub-band) as shown in FIG.

[0070] Case-b is a case in which the UE receives the PDCCH / PDSCH / CSI-RS in a symbol (in the DL-sub-band) as shown in FIG.

[0071] Case-c is a case in which the UE 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.

[0072] Case-d is a case in which the UE 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 Figure 15.

[0073] Which case to apply may be predetermined in the wireless communication system 10 or may be set by the RRC.

[0074] For example, for Case-a and Case-b, an SBFD operating cell of the SBFD symbol may be considered as a reference cell candidate. 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 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 receives PDCCH, PDSCH, or CSI-RS at the symbol" may be applied to the SBFD symbol.

[0075] For example, in Case-c, the SBFD operating cell may not be considered as a candidate for the reference cell.

[0076] For example, for Case-d, an SBFD operating cell may be considered as a reference cell candidate, or an SBFD operating cell may not be considered as a reference cell candidate. 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), an SBFD operating cell may be considered as a reference cell candidate, and the symbol may be assumed to be an (RRC) UL / DL symbol.

[0077] In Option 4, different cases may be applied to the SBFD DL symbol and the SBFD Flexible symbol. For example, for the SBFD DL symbol, the SBFD operating cell may be considered as a reference cell candidate in Case-a to Case-d. For the SBFD Flexible symbol, the SBFD operating cell may be considered as a reference cell candidate in Case-a and Case-b, but may not be considered as a reference cell candidate in Case-c and Case-d.

[0078] 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.

[0079] In Alt.a, the reference cell may be the cell with the smallest cell index among the reference cell candidates. Alt.a is the same as the existing rule.

[0080] In Alt.b, the reference cell may be a high-priority SBFD operating cell. For example, if there is at least one SBFD operating cell among the reference cell candidates, the reference cell may be a cell with the smallest cell index among the at least one SBFD operating cell. If there is no SBFD operating cell among the reference cell candidates, the reference cell may be a cell with the smallest cell index among the reference cell candidates.

[0081] In Alt.c, the reference cell may be a non-SBFD operating cell with a high priority. For example, if there is at least one non-SBFD operating 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 operating cell. If there is no non-SBFD operating cell among the reference cell candidates, the reference cell may be the cell with the smallest cell index among the reference cell candidates.

[0082] In Alt.d, the reference cell may be an SBFD operating cell with a higher priority SBFD symbol. For example, if there is an SBFD operating cell with 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 operating cells with at least one SBFD symbol. If there is not an SBFD operating cell with 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.

[0083] In Alternative e, the reference cell may be a non-SBFD operating cell with a non-SBFD symbol having a higher priority. For example, if there is at least one non-SBFD operating cell with 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 operating cells with at least one non-SBFD symbol. If there is not at least one non-SBFD operating cell with 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.

[0084] As described above, when it is assumed that the directional collision processing is configured to be applied in the SBFD operating cell, the UE 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 the conditions defined in the above-mentioned options and alternatives.

[0085] <Terminology> The following explains the definitions of terms related to SBFD.

[0086] SBFD symbol: Symbol set in SBFD sub-band Non-SBFD symbols: Symbols that are not configured in the SBFD sub-bands DL (or semi-static D) symbol: A symbol designated as DL by tdd-UL-DL-ConfigurationCommon and / or tdd-UL-DL-ConfigDedicated UL (or semi-static U) symbol: A symbol designated as UL by tdd-UL-DL-ConfigurationCommon and / or TDD-UL-DL-ConfigDedicated Flexible (or Semi-Static F, or Flexible) Symbol: A symbol designated as flexible by tdd-UL-DL-ConfigurationCommon and / or tdd-UL-DL-ConfigDedicated SBFD DL symbol: A symbol indicated as downlink (DL) by the tdd-UL-DL-Configuration Common and / or tdd-UL-DL-Configuration Dedicated, in which the SBFD subband is configured SBFD Flexible (FL) Symbol: A symbol indicated as flexible by the tdd-UL-DL-Configuration Common and / or tdd-UL-DL-Configuration Dedicated, in which SBFD sub-bands are configured.

[0087] <Considerations> At the RAN1#120 meeting, it was agreed that in the CA case, SBFD operation will be supported on one cell. The impact on half-duplex TDD CA operation may be further discussed.

[0088] Half duplex CA collision handling with SBFD cells is proposed, and the method of determining the reference cell and the collision handling between cells can be discussed.

[0089] However, the following points can be further discussed: 1.P / SP / AP / L1 CLI-RSSI / SRS-RSRP measurement resources were introduced in Rel-19, but the handling of L1 CLI-RSSI / SRS-RSRP measurement resources has not been considered. Note that P stands for periodic, SP stands for semi-persistent, and AP stands for aperiodic. CLI-RSSI stands for Cross-Link Interference-Received Signal Strength Indicator. SRS-RSRP stands for Sounding Reference Signal-Reference Signal Received Power. 2. Some of the cases described in Figures 13 and 14 do not cover collision handling.

[0090] In the present disclosure, a technique for half-duplex CA collision handling that takes into account P / SP / AP / L1 CLI-RSSI / SRS-RSRP measurement resources is provided.

[0091] This disclosure provides techniques for UE operation covering half-duplex TDD CA collision handling.

[0092] <Proposal overview> In this disclosure, techniques of Proposal 1 to Proposal 4 are provided. Proposal 1: Consider L1 SRS-RSRP / CLI-RSSI measurements for half-duplex CA collision handling for configured or scheduled DL reception. Proposal 2: Changes to UE operation / specifications for Case 1-1 / Case 1-2 / Case 1-3 shown in Figure 13 Proposal 3: Changes to UE operation / specifications for Case 2-1 / Case 2-2 / Case 2-3 shown in Figure 14 Proposal 4: Changes to UE operation / specifications for Case 3-1 / Case 3-2 / Case 3-3 / Case 3-4 / Case 3-5 / Case 3-6 / Case 3-7 shown in Figure 14

[0093] <Proposal 1> In Proposal 1, for configured or scheduled DL reception, L1 SRS-RSRP / CLI-RSSI measurements are taken into account for half-duplex CA collision handling.

[0094] Regarding the determination of the reference cell, a part of the above <SBFD operation cell> is updated. For example, “PDCCH / PDSCH / CSI-RS set by the upper layer” includes “L1 SRS-RSRP / CLI-RSSI measurements set by the upper layer”. Specifically, “receiving PDCCH, PDSCH, or CSI-RS” is replaced with “receiving PDCCH, PDSCH, or CSI-RS, or measuring L1 SRS-RSRP / CLI-RSSI”.

[0095] Note that Proposal 1 is combined with Proposals 2 / 3 / 4 described below. For example, Proposals 2 / 3 / 4 may include configured DL reception, configured PDCCH, PDSCH, or CSI-RS, or L1 SRS-RSRP / CLI-RSSI measurements. Also, “P / SP / AP” may be added to “L1 SRS-RSRP / CLI-RSSI” described below, or only a part of P / SP / AP, for example, only P, or only P / SP may be added.

[0096] FIGs. 16 and 17 are diagrams for explaining Proposal 1. The explanation shown in FIG. 16 continues with the explanation of FIG. 17.

[0097] As described in the above <half-duplex CA operation 2>, the UE determines the reference cell symbol by symbol. If the symbol is flexible and the UE is configured by the upper layer to receive PDCCH, PDSCH, or CSI-RS in the symbol, or to measure L1 SRS-RSRP / CLI-RSSI, the symbol is set as downlink by the upper layer.

[0098] If other cells with directionalCollisionHandling-r16 configured operate in the same frequency band as the reference cell, the UE does not expect to be configured by higher layers to receive PDCCH, PDSCH, or CSI-RS on the flexible symbols of the reference cell or to measure L1 SRS-RSRP / CLI-RSSI, and does not expect to detect DCI formats that schedule transmissions on the symbols of other cells.

[0099] If the reference cell and other cells among the cells with directionalCollisionHandling-r16 configured operate in different frequency bands, if tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated indicate symbols as downlink or uplink of other cells and uplink or downlink of reference cell, respectively, the UE shall assume the symbols to be flexible and shall not receive PDCCH, PDSCH, or CSI-RS configured by higher layers, or L1 SRS-RSRP / CLI-RSSI measurements, and shall not transmit SRS, PUCCH, PUSCH, or PRACH configured by higher layers.

[0100] If the reference cell and other cells with directionalCollisionHandling-r16 configured operate in different frequency bands, when the UE detects a DCI format that schedules transmission on one or more symbols in the symbol set of the other cell, the UE does not need to receive PDCCH, PDSCH, or CSI-RS, or L1 SRS-RSRP / CLI-RSSI measurements configured by higher layers, on the flexible symbols of the reference cell in the symbol set.

[0101] Regardless of whether the reference cell and other cells operate in the same frequency band or different frequency bands, if at least one symbol of the symbol set is indicated as downlink by the tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated, or is a symbol corresponding to PDCCH, PDSCH, or CSI-RS reception configured by higher layers in the reference cell, or L1 SRS-RSRP / CLI-RSSI measurement, the UE shall not transmit PUCCH, PUSCH, or PRACH configured by higher layers in the symbol set of other cells.

[0102] Regardless of whether the reference cell and other cells operate in the same frequency band or different frequency bands, the reference cell shall not transmit SRS configured by higher layers on the symbol set of other cells if the symbol set is indicated as downlink by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated, or corresponds to PDCCH, PDSCH, or CSI-RS reception or L1 SRS-RSRP / CLI-RSSI measurement configured by higher layers in the reference cell.

[0103] Regardless of whether the reference cell and other cells operate in the same frequency band or different frequency bands, if at least one symbol of the symbol set is indicated as uplink by the tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated or is a symbol corresponding to an SRS, PUCCH, PUSCH, or PRACH transmission configured by higher layers in the reference cell, the UE will not receive PDCCH, PDSCH, or CSI-RS configured by higher layers in the symbol set of other cells, or L1 SRS-RSRP / CLI-RSSI measurements.

[0104] Regardless of whether the reference cell and other cells operate in the same frequency band or different frequency bands, if the UE is configured by higher layers to transmit SRS, PUCCH, PUSCH, or PRACH, or to receive PDCCH, PDSCH, or CSI-RS, or to measure L1 SRS-RSRP / CLI-RSSI in the reference cell, respectively, the UE shall assume that the symbols indicated as downlink or uplink by the tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated of the other cells are flexible.

[0105] <Proposal 1: Summary> According to the above process, the UE can support half-duplex TDD CA operation and SBFD operation on one cell and can perform L1 SRS-RSRP / CLI-RSSI measurements properly.

[0106] <Proposal 2> Proposal 2 provides a technique for the case where SBFD operation and directionalCollisionHandling-r16 are configured and the UE operates in the same frequency band as the reference cell in other cells. That is, it provides a technique for changing the UE operation / specifications for Case 1-1 / Case 1-2 / Case 1-3 when SBFD operation is supported.

[0107] In Proposal 2, Proposal 2-1 explains cases in which the current restrictions when the SBFD subband is set to the reference cell / other cell are relaxed, and Proposal 2-2 explains UE operation in each case of Proposal 2-1.

[0108] <Proposal 2: Proposal 2-1> The specifications (Case 1-1, Case 1-2, and Case 1-3) when SBFD operation and directionalCollisionHandling-r16 are configured and the UE operates in the same frequency band as the reference cell in other cells are changed as follows (see also Figure 18). Case 1-1 The UE does not expect symbols to be indicated as non-SBFD downlink or uplink in the reference cell by the tdd-UL-DL-Configuration Common or tdd-UL-DL-Configuration Dedicated, respectively, and as uplink or non-SBFD downlink in other cells. Case 1-2 The UE does not expect to detect a DCI format in which tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated indicates the reference cell's symbols as non-SBFD downlink and schedules the transmission of other cells' symbols. Case 1-3 The UE receives PDCCH, PDSCH, or CSI-RS in the flexible or SBFD symbols of the reference cell and does not expect to be configured by higher layers to detect DCI formats that schedule transmissions in the symbols of other cells.

[0109] With the above specification change (when the SBFD subband is configured in the reference cell / other cell), the current restrictions are relaxed and the following cases may be allowed: Case 1-A The symbol is configured as an SBFD DL symbol in the reference cell and as a semi-static UL symbol in other cells. Case 1-B The symbol is configured as a semi-static SFI UL symbol in the reference cell and as a SBFD DL symbol in other cells. Case 1-C The symbol is configured as an SBFD DL symbol in the reference cell, and the UE detects DCI that schedules UL transmission in the symbol of other cells.

[0110] <Proposal 2: Proposal 2-2> In Proposal 2-2, UE operations in Case 1-A, Case 1-B, and Case 1-C of Proposal 2-1 will be explained.

[0111] <Proposal 2: Proposal 2-2: Case 1-A> The symbols are configured as SBFD DL symbols in the reference cell and as semi-SFI UL symbols in other cells. As UE operations, the following Case 1A-1, Case 1A-2, and Case 1A-3 are provided.

[0112] Case 1A-1 If the UE is scheduled by DCI to receive DL reception on the symbols of the reference cell, -Alt.1A-1-1 The UE can receive DL transmissions in the symbols of the reference cell. The UE does not transmit UL transmissions in the symbols of other cells. -Alt.1A-1-2 UE does not expect this to be the case. Case 1A-2 If the UE is configured to receive DL reception on the symbols of the reference cell, -Alt.1A-2-1 The UE assumes symbol flexibility: it does not need to (or does not) receive configured DL reception, and does not expect to transmit configured UL transmissions on symbols of the reference cell or other cells. -Alt.1A-2-2 The UE receives configured DL reception in the symbols of the reference cell. The UE does not transmit configured UL transmission in the symbols of other cells. -Alt.1A-2-3 The UE does not need to (or does not) receive configured DL reception on symbols of the reference cell. The UE can transmit configured UL transmissions on other cells.

[0113] Case 1A-3 If the UE is configured or scheduled by the DCI to send an UL transmission on the symbol of the reference cell, there is no collision.

[0114] <Proposal 2: Proposal 2-2: Case 1-B> The symbols are configured as semi-SFI UL symbols in the reference cell and as SBFD DL symbols in other cells. As UE operations, the following Case 1B-1, Case 1B-2, and Case 1B-3 are provided.

[0115] Case 1B-1 If the UE is scheduled by DCI to receive DL reception on symbols of other cells, -Alt.1B-1-1 The UE receives DL transmissions in the symbols of other cells, and does not transmit UL transmissions in the symbols of the reference cell. -Alt.1B-1-2 UE does not expect this to be the case.

[0116] Case 1B-2 If the UE is configured to receive DL reception on symbols of other cells, -Alt.1B-2-1 The UE assumes symbol flexibility: it does not need to (or does not) receive configured DL reception and does not expect to transmit configured UL transmissions on symbols of the reference cell or other cells. -Alt.1B-2-2 The UE receives configured DL reception in the symbols of other cells. The UE does not transmit configured UL transmission in the symbols of the reference cell. -Alt.1B-2-3 The UE does not need to (or does not) receive configured DL reception on symbols of other cells. The UE can / may transmit configured UL transmission on the reference cell.

[0117] Case 1B-3 If the UE is scheduled by DCI or configured to send UL transmissions in other cells, there is no collision.

[0118] <Proposal 2: Proposal 2-2: Case 1-C> The symbol is configured as an SBFD DL symbol in the reference cell, and the UE detects DCI that schedules UL transmission in the symbol of another cell. As UE operations, the following Case 1C-1, Case 1C-2, and Case 1C-3 are provided.

[0119] Case 1C-1 If the UE is scheduled by the DCI to receive DL reception on the symbols of the reference cell, the UE does not expect this to be the case.

[0120] Case 1C-2 If the UE is configured to receive DL reception on the symbols of the reference cell, -Alt.1C-2-1 UE does not expect this to be the case. -Alt.1C-2-2 The UE does not need to (or does not) receive configured DL reception on the reference cell's symbols, and the UE transmits UL transmissions on other cells.

[0121] Case 1C-3 If the UE is configured or scheduled by DCI to send an UL transmission on the symbol of the reference cell, there is no collision.

[0122] <Proposal 2: Summary> According to the above process, the UE can support half-duplex TDD CA operation and SBFD operation on one cell, and can properly perform communications when collision handling is performed.

[0123] <Proposal 3> Proposal 3 provides a technique for the case where SBFD operation and directionalCollisionHandling-r16 are configured and the UE operates in a frequency band where other cells are different from the reference cell. That is, it provides a technique for changing the UE operation / specifications of Case 2-1 when SBFD operation is supported.

[0124] Case 2-2 can function when the symbol of the reference cell is SBFD DL or non-SBFD DL. Case 2-3 is not related to semi-static SFI DL symbols. Therefore, Case 2-2 and Case 2-3 remain unchanged. Case 2-1 is modified as follows (see also Figure 19): Case 2-1 If the tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated respectively indicate a symbol as a non-SBFD downlink or uplink of another cell, or as an uplink or non-SBFD downlink of a reference cell, the UE shall assume the symbol to be flexible and shall not need to receive PDCCH, PDSCH, or CSI-RS configured by higher layers, and shall not expect to transmit SRS, PUCCH, PUSCH, or PRACH configured by higher layers.

[0125] The above changes are limited to the non-SBFD DL case. With the above changes, the UE behavior for the following cases is clarified: Case 2-A The UE is configured to receive DL reception on SBFD DL symbols of other cells, and the symbols are configured as semi-SFI U in the reference cell. Case 2-B The UE is scheduled by DCI to receive DL reception on the SBFD DL symbol of another cell, and the symbol is configured as semi-SFI U in the reference cell. Case 2-C The UE is configured or scheduled by DCI to transmit UL transmissions in the SBFD DL symbols of another cell, and the symbols are configured as semi-SFI U in the reference cell. Case 2-D The UE is configured to receive DL reception on the SBFD DL symbol of the reference cell, and the symbol is configured as semi-SFI U in other cells. Case 2-E The UE is scheduled by the DCI to receive DL reception on the SBFD DL symbol of the reference cell, and the symbol is configured as semi-SFI U in other cells. Case 2-F The UE is configured or scheduled by DCI to transmit UL transmissions on SBFD DL symbols of the reference cell, and the symbols are configured as semi-SFI U in other cells.

[0126] The UE behavior in the above case is as follows: UE behavior for Case 2-A The UE is configured to receive DL reception on SBFD DL symbols of other cells, and the symbols are configured as semi-SFI U in the reference cell. Alt.1B-2-1 / Alt.1B-2-2 / Alt.1B-2-3 in Case 1B-2 of Proposal 2 can be reused. If Alt.1B-2-1 is applied, it is the same as legacy (Case 2-1). UE behavior for Case 2-B The UE is scheduled by DCI to receive DL reception on the SBFD DL symbol of another cell, and the symbol is configured as semi-SFI U in the reference cell. Alt1.B-1-1 / Alt.1B-1-2 in Case 1B-1 of Proposal 2 can be reused. UE behavior for Case 2-C The UE is configured or scheduled by DCI to send an UL transmission in the SBFD DL symbol of another cell, and the symbol is configured as semi-SFI U in the reference cell. In this case, there is no collision. UE behavior for Case 2-D The UE is configured to receive DL reception on the SBFD DL symbol of the reference cell, and the symbol is configured as semi-SFI U in other cells. Alt.1A-2-1 / Alt.1A-2-2 / Alt.1A-2-3 in Case 1A-2 of Proposal 2 can be reused. When Alt.1A-2-1 is applied, it is the same as legacy (Case 2-1). UE behavior for Case 2-E The UE is scheduled by the DCI to receive DL reception on the SBFD DL symbol of the reference cell, and the symbol is configured as semi-SFI U in other cells. Alt.1A-1-1 / Alt.1A-1-2 in Case 1A-1 of Proposal 2 can be reused. UE behavior for Case 2-F The UE is configured or scheduled by DCI to send UL transmission in the SBFD DL symbol of the reference cell, and the symbol is configured as semi-SFI U in the other cell. In this case, there is no collision.

[0127] <Proposal 3: Summary> According to the above process, the UE can support half-duplex TDD CA operation and SBFD operation on one cell, and can properly perform communications when collision handling is performed.

[0128] <Suggestion 4> Proposal 4 provides techniques for the case where SBFD operation and directionalCollisionHandling-r16 are configured, regardless of whether other cells use the same or different frequency band as the reference cell. That is, it provides techniques for changing UE operation / specifications for Case 3-3, Case 3-4, and Case 3-6 when SBFD operation is supported.

[0129] Case 3-1, Case 3-2, Case 3-5, and Case 3-7 are not related to the semi-static SFI DL symbol. Therefore, these cases are unchanged. Case 3-3, Case 3-4, and Case 3-6 are changed as follows (see also Figure 20): Case 3-3 The UE shall not transmit PUCCH, PUSCH, or PRACH configured by higher layers in a symbol set of another cell if at least one symbol of the symbol set is indicated as non-SBFD downlink by the tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated, or is a symbol corresponding to PDCCH, PDSCH, or CSI-RS reception configured by higher layers in the reference cell. Case 3-4 The UE shall not transmit SRS configured by higher layers on symbol sets of other cells if the symbol set is indicated as non-SBFD downlink by tdd-UL-DL-ConfigurationCommon or corresponds to PDCCH, PDSCH, or CSI-RS reception configured by higher layers in the reference cell. Case 3-6 If the UE is configured by higher layers to transmit SRS, PUCCH, PUSCH, or PRACH or to receive PDCCH, PDSCH, or CSI-RS, respectively, in the reference cell, the UE shall assume as flexible the symbols indicated as non-SBFD downlink or uplink by the tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated of other cells.

[0130] Case 3-3 / Case 3-4 / Case 3-6 may be restricted to non-SBFD DL cases. With the above changes, the UE behavior in the following cases is clarified: Case 3-A The UE is configured to transmit an UL transmission (eg, SRS, PUCCH, PUSCH, or PRACH) on a symbol of another cell, and the symbol is configured as an SBFD DL symbol on the reference cell. Case 3-B The UE is configured for UL transmission (eg, SRS, PUCCH, PUSCH, or PRACH) on symbols of the reference cell, and the symbols are configured as SBFD DL symbols in other cells.

[0131] The UE operations in the above Case 3-A and Case 3-B are as follows. UE behavior for Case 3-A The UE is configured to transmit UL transmission (e.g., SRS, PUCCH, PUSCH, or PRACH) on a symbol of another cell, and the symbol is configured as an SBFD DL symbol in the reference cell. The following Case 3A-1, Case 3A-2, and Case 3A-3 are provided as UE operations. Case 3A-1 If the UE is scheduled by DCI to receive DL reception on the symbols of the reference cell, -Alt.3A-1-1 UE does not expect this to be the case. -Alt.3A-1-2 The UE does not send configured UL transmissions in symbols of other cells. The UE can receive scheduled DL receptions in the reference cell. Case 3A-2 If the UE is configured to receive DL reception on the symbols of the reference cell, -Alt.3A-2-1 UE does not expect this to be the case. -Alt.3A-2-2 The UE does not need to (or does not) receive configured DL reception on symbols of the reference cell. The UE can transmit configured UL transmissions on other cells. -Alt.3A-2-3 The UE does not transmit configured UL transmissions in symbols of other cells. The UE can receive configured DL receptions in the reference cell. Case 3A-3 If the UE is configured or scheduled by DCI to send an UL transmission on the symbol of the reference cell, there is no collision.

[0132] UE behavior for Case 3-B The UE is configured for UL transmission (e.g., SRS, PUCCH, PUSCH, or PRACH) on symbols of the reference cell, and the symbols are configured as SBFD DL symbols in other cells. The following Case 3B-1, Case 3B-2, and Case 3B-3 are provided as UE operations. Case 3B-1 If the UE is scheduled by DCI to receive DL reception on other cell symbols, -Alt.3B-1-1 UE does not expect this to be the case. -Alt.3B-1-2 The UE does not send configured UL transmissions on the symbols of the reference cell. The UE can receive scheduled DL receptions on other cells. ··Case3B-2 If the UE is configured to receive DL reception with symbols of other cells, -Alt.3B-2-1 The UE does not expect such a case. -Alt.3B-2-2 The UE does not need to (or does not) receive configured DL reception with symbols of other cells. The UE can transmit configured UL transmission on the reference cell. -Alt.3B-2-3 The UE does not transmit configured UL transmission with symbols of the reference cell. The UE can receive configured DL reception on other cells. ··case3B-3 If the UE is configured or scheduled by DCI to transmit UL transmission with symbols of other cells, there is no collision.

[0133] <Proposal 4: Summary> According to the above processing, the UE can support semi-duplex TDD CA operation and SBFD operation on one cell, and can appropriately execute communication when collision processing is performed.

[0134] <UE Capability> In the UE capability indicating the UE's capabilities, information indicating the following UE capabilities may be included. For example, the following new UE capabilities and reporting signaling (and RRC configuration) may be defined. Note that the information indicating the UE's capabilities may correspond to the information defining the UE's capabilities. The UE may report information indicating the following UE capabilities to the gNB. · UE capabilities regarding each proposal · Capabilities regarding each option in each proposal, or combinations of each option · Capabilities regarding each alternative in each proposal, or combinations of each alternative The UE may report information indicating the above UE capabilities to the gNB for each frequency. · Capabilities for each UE / FR1 / FR2 / FR2-1 / FR2-2 / FR3 / SCS / Band / BC / FC / FSPC, etc. The UE may report to the gNB information indicating the capabilities of the UE as described above for each cell. · Capabilities for each UE / cell / TDD / FDD, etc.

[0135] The above UE capabilities and the configurations of this proposal are closely related. When the functions related to each option in each proposal depend on the UE capabilities, the gNB may select or permit the functions related to each option based on the capabilities reported by the UE.

[0136] <Combination with options> In the proposals of this disclosure, it may be determined as follows which proposal is applied or which option or alternative is used. · Set by upper layer parameters · Determined by related upper layer parameters · Indicated in MAC CE or DCI · Determined based on UE capabilities · Described in the specification · Determined based on the conditions described in the specification · Determined by upper layer parameter / MAC CE / DCI configurations and reported UE functions (combinations of the above determinations)

[0137] In each proposal of this disclosure, a plurality of options and alternatives may be combined as one option / alternative. Also, throughout the proposal, the measured RS (reference signal) becomes the QCL source RS of the active TCI state / indicated TCI state.

[0138] <Signal from NW to UE> In this disclosure, the UE may receive the following types of information from the network (NW): Also, throughout the proposal, the network (NW) may be referred to as a gNB. Information via higher layer signaling (e.g., RRC messages / LPP (LTE propositioning protocol) messages) MAC CE Subheader with new LCID in the subheader Extending an existing MAC CE (e.g., introducing a new octet) DCI DCI Field: Existing DCI field or newly introduced DCI field RNTI: DCI with CRC scrambled by the existing RNTI or the newly introduced RNTI DCI Format: Existing DCI format or newly introduced DCI format Combination of the above information

[0139] In the present disclosure, the UE may receive information from the network (NW) in the following periodic format: Option 1: Receive periodic updates Option 2: Semi-persistent reception of information (triggered by UE or gNB instructions) Option 3: Aperiodic information reception (triggered by UE or gNB instructions)

[0140] In the present disclosure, the UE may receive information from the network (NW) as the following QCL rules: QCL Type A QCL Type B QCL Type C QCL Type D

[0141] In this disclosure, the QCL resource RS for each QCL type may be configured as follows: SSB (SS / PBCH Block) ·With / without CSI-RS repetition ·TRS (tracking reference signal) ·PDCCH / PDSCH DMRS

[0142] In the present disclosure, information from the network (NW) is set / shown as follows. ·UE common / UE dedicated ·Cell-specific / cell common ·Per UE / CC / BWP / band / cell / CG

[0143] <Signal from UE to NW> In the present disclosure, the UE may report the following types of information to the network (NW). Also, throughout the proposal, the network (NW) may relay it to the gNB. ·Information via higher layer signaling (e.g., RRC message / LPP message) ·MAC CE Sub-header with a new LCID in the sub-header Extend existing MAC CE (e.g., introduce new octets) ·UCI UCI on PUCCH or PUSCH ·Combination of the above information

[0144] In the present disclosure, the UE may report information to the network (NW) in the following periodic formats. Option 1: Transmit information periodically Option 2: Transmit information semi-persistently (triggered by UE or gNB instruction) Option 3: Transmit information aperiodically (triggered by UE or gNB instruction)

[0145] <Base station configuration> Fig. 21 is a block diagram showing an example of the configuration of a base station 100 (gNodeB (gNB) 100) according to this embodiment. The gNB 100 includes, for example, a transmitter 101, a receiver 102, and a controller 103. The gNB 100 communicates with a UE 200 (see Fig. 22) wirelessly.

[0146] The transmitter 101 transmits a downlink (DL) signal to the UE 200. For example, under the control of the controller 103, the transmitter 101 transmits a DL signal (for example, the above-mentioned RRC, SIB, MAC CE, DCI, notification, confirmation, etc.).

[0147] The DL signal may include, for example, a downlink data signal and control information (e.g., Downlink Control Information (DCI)). The DL signal may also include information indicating scheduling related to signal transmission by the UE 200 (e.g., an UL grant). The DL signal may also include control information of higher layers (e.g., control information of Radio Resource Control (RRC)). The DL signal may also include a reference signal.

[0148] The channels used for transmitting DL signals include, for example, a downlink data channel and a downlink control channel. For example, the downlink data channel may include a PDSCH (Physical Downlink Shared Channel), and the downlink control channel may include a PDCCH (Physical Downlink Control Channel). For example, the gNB 100 transmits downlink control information to the UE 200 using the PDCCH and transmits downlink data signals using the PDSCH.

[0149] The reference signal included in the DL signal may include at least one of a demodulation reference signal (Demodulation Reference Signal (DMRS)), a Phase Tracking Reference Signal (PTRS), a Channel State Information-Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), and a Positioning Reference Signal (PRS) for position information. For example, reference signals such as DMRS and PTRS are used for demodulating downlink data signals and are transmitted using the PDSCH.

[0150] The receiver 102 receives an uplink (UL) signal transmitted from the UE 200. For example, under the control of the controller 103, the receiver 102 receives an UL signal (for example, the above-mentioned request, notification, etc.).

[0151] The transmitting unit 101 and the receiving unit 102 may be collectively referred to as a communication unit.

[0152] The control unit 103 controls the communication operations of the gNB 100, including the transmission processing of the transmission unit 101 and the reception processing of the reception unit 102.

[0153] For example, the control unit 103 acquires information such as data and control information from the upper layer and outputs it to the transmitting unit 101. The control unit 103 also outputs the data, control information, etc. received from the receiving unit 102 to the upper layer.

[0154] For example, the control unit 103 allocates resources (or channels) used for transmitting and receiving DL signals and / or resources used for transmitting and receiving UL signals based on a signal (e.g., data and control information, etc.) received from the UE 200 and / or data and control information, etc. acquired from an upper layer. Information on the allocated resources may be included in control information transmitted to the UE 200.

[0155] <Device configuration> 22 is a block diagram showing an example of the configuration of UE 200 according to the present embodiment. UE 200 includes, for example, a receiving unit 201, a transmitting unit 202, and a control unit 203. UE 200 communicates with gNB 100, for example, by radio.

[0156] The transmitter 202 transmits an UL signal to the gNB 100. For example, the transmitter 202 transmits the UL signal under the control of the controller 203. For example, the transmitter 202 may transmit an MsgA PRACH in a valid MsgA RO determined by the controller 203, and may transmit an MsgA PUSCH in a valid MsgA PO determined by the controller 203.

[0157] The UL signal may include, for example, an uplink data signal and control information (e.g., UCI). For example, information related to the processing capability of the UE 200 (e.g., UE capability) may be included. The UL signal may also include a reference signal.

[0158] The channels used for transmitting UL signals include, for example, an uplink data channel and an uplink control channel. For example, the uplink data channel includes a PUSCH (Physical Uplink Shared Channel), and the uplink control channel includes a PUCCH (Physical Uplink Control Channel). For example, the UE 200 transmits uplink control information to the gNB 100 using the PUCCH and transmits an uplink data signal using the PUSCH.

[0159] The reference signals included in the UL signal may include, for example, at least one of DMRS, PTRS, CSI-RS, SRS, and PRS. For example, the reference signals such as DMRS and PTRS are used for demodulating the uplink data signal and are transmitted using an uplink channel (for example, PUSCH).

[0160] The receiving unit 201 and the transmitting unit 202 may be collectively referred to as a communication unit.

[0161] The control unit 203 controls the communication operations of the UE 200, including the reception processing in the reception unit 201 and the transmission processing in the transmission unit 202.

[0162] For example, the control unit 203 acquires information such as data and control information from a higher layer and outputs it to the transmitting unit 202. Also, the control unit 203 outputs, for example, the data and control information received from the receiving unit 201 to the higher layer.

[0163] For example, the control unit 203 controls transmission of information to be fed back to the gNB 100. The information to be fed back to the gNB 100 may include, for example, HARQ-ACK, Channel State Information (CSI), or a Scheduling Request (SR). The information to be fed back to the gNB 100 may be included in UCI.

[0164] Here, the communication units (receiving unit 201 and transmitting unit 202) may communicate using half-duplex time division duplexing in multiple cells. For example, the communication units may communicate using half-duplex TDD CA operation. The control unit 203 may determine a reference cell from multiple cells for each symbol for directional collision processing. One of the multiple cells may be a cell capable of simultaneous communication of uplink signals and downlink signals. For example, one of the multiple cells may be an SBFD operating cell. The control unit 203 may control measurement of link interference in the reference cell or cells other than the reference cell. The measurement of link interference may be L1 SRS-RSRP / CLI-RSSI measurement. The measurement of link interference may be interpreted as measurement of uplink / downlink interference or measurement of resources for link interference measurement. The control unit 203 may determine the uplink or downlink of a symbol between the reference cell and cells other than the reference cell.

[0165] The present disclosure has been described above. Note that the division of items in the above description is not essential to the present disclosure, and items described in two or more items may be used in combination as needed, and items described in one item may be applied to items described in another item (unless they are inconsistent).

[0166] <Hardware configuration> The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and 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 (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining the single device or multiple devices with software.

[0167] 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, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocation, 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 these functions are implemented.

[0168] For example, a base station, a terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 23 is a diagram illustrating an example of the hardware configuration of a base station and a terminal according to this embodiment. The above-described base station 100 and terminal 200 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0169] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of base station 100 and terminal 200 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.

[0170] Each function in the base station 100 and the terminal 200 is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and the memory 1002, causing the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0171] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 103 and control unit 203 may be realized by the processor 1001.

[0172] Furthermore, the processor 1001 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. For example, the control unit 203 of the terminal 200 may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be made for other functional blocks. While the above-described various processes have been described as being executed by one processor 1001, they may also 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 also be transmitted from a network via a telecommunications line.

[0173] The memory 1002 is a computer-readable recording medium and may be configured, for example, by at least one of 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 can store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0174] Storage 1003 is a computer-readable recording medium, and may be composed of at least one of, for example, an optical disk such as a CD-ROM (Compact Disc 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 storage medium may be, for example, a database, a server, or other appropriate medium including at least one of memory 1002 and storage 1003.

[0175] 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 referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmitter 101, receiver 102, receiver 201, transmitter 202, etc. may be realized by the communication device 1004.

[0176] The input device 1005 is an input device (for example, 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 (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0177] 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.

[0178] Furthermore, base station 100 and terminal 200 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, processor 1001 may be implemented using at least one of these pieces of hardware.

[0179] <Information notification, signaling> 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., Radio Resource Control (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.

[0180] <Applicable systems> Each aspect / embodiment described in the present disclosure may be any of the following: LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or decimal number)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to at least one of systems using 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), or other appropriate systems, and next-generation systems that are extended, modified, created, or defined based on these systems. The present invention may also be applied to a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G).

[0181] <Processing procedures, etc.> 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.

[0182] <Base station operation> In the present disclosure, a specific operation described as being performed by a base station may be performed by its upper node in some cases. In a network consisting of one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal may be performed by at least one of the base station and another network node other than the base station (for example, but not limited to, an MME or an S-GW). Although the above example illustrates a case where there is one other network node other than the base station, a combination of multiple other network nodes (for example, an MME and an S-GW) may also be used.

[0183] <Input / output direction> Information, etc. (see the section on information and signals) can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may also be input and output via multiple network nodes.

[0184] <Handling of input and output information> Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

[0185] <Judgment method> 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).

[0186] <Variations of form, etc.> Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0187] 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.

[0188] <Software> 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.

[0189] 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.

[0190] <Information, Signals> 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.

[0191] Note that terms explained 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.

[0192] <System, Network> As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0193] <Parameter, channel name> Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or other corresponding information. For example, a radio resource may be indicated by an index.

[0194] 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.

[0195] <Base station> 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.

[0196] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0197] 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.

[0198] <Mobile station> In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0199] 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.

[0200] <Base station / mobile station> 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 refers to a movable object, and may move at any speed. Naturally, this also includes cases where the mobile object is stationary. Examples of the mobile object include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon. The mobile object may also be an autonomous mobile object operating based on an operational command. It 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 be a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0201] Furthermore, a base station in the present disclosure may be read as a terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the terminal 200 may be configured to have the functions of the base station 100 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0202] Similarly, the term "terminal" in the present disclosure may be read as "base station." In this case, the base station 100 may be configured to have the functions of the terminal 200 described above.

[0203] Fig. 24 shows an example configuration of a vehicle 2001. As shown in Fig. 24, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, 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. Each aspect / embodiment described in the present disclosure may be applied to a communication device mounted on the vehicle 2001, and may be applied to the communication module 2013, for example.

[0204] The drive unit 2002 is configured, for example, by an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0205] 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 2029 provided in the vehicle 2001. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0206] The signals from the various sensors 2021 to 2029 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.

[0207] 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 (outputting) various 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 acquired from external devices via the communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.

[0208] The information service unit 2012 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0209] 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 a millimeter-wave radar, a LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high-definition (HD) map, autonomous vehicle (AV) map, etc.), a gyro system (e.g., an IMU (Inertial Measurement Unit), an INS (Inertial Navigation System), etc.), an AI (Artificial Intelligence) chip, and an AI processor, 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 the driving assistance function or the autonomous driving function.

[0210] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided in the vehicle 2001.

[0211] 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.

[0212] The communication module 2013 may transmit at least one of signals from the above-mentioned various sensors 2021-2029 input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021-2029, the information service unit 2012, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above-mentioned input.

[0213] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on the information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 2013 (or data / information decoded from the PDSCH)).

[0214] Furthermore, the communication module 2013 stores various information received from 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, front wheels 2007, rear wheels 2008, axle 2009, sensors 2021 to 2029, and the like provided in the vehicle 2001.

[0215] <Terminology and interpretation> 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.

[0216] 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.

[0217] <Reference signal> The reference signal may be abbreviated as RS (Reference Signal), and may also be called a pilot or pilot signal depending on the applicable standard.

[0218] <The meaning of "based on"> 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."

[0219] <"First", "Second"> 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 or that the first element must in some way precede the second element.

[0220] <Means> In the configurations of each of the above devices, the "means" may be replaced with "section", "circuit", "device", etc.

[0221] <Open format> In the present disclosure, when the terms "include", "including" and their variants are used, these terms are intended to be inclusive, similar to the term "comprising". Further, the term "or" used in the present disclosure is not intended to be an exclusive disjunction.

[0222] <Time units such as TTI, frequency units such as RB, radio frame configuration> A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) independent of numerology.

[0223] Numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology may indicate, for example, at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processing performed by a transceiver in the frequency domain, specific windowing processing performed by a transceiver in the time domain, etc.

[0224] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may be a time unit based on numerology.

[0225] 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.

[0226] 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.

[0227] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called 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 (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0228] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. However, the definition of TTI is not limited to this.

[0229] 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.

[0230] 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. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0231] A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0232] 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.

[0233] A resource block (RB) is a resource allocation unit in the time domain and 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 also be determined based on numerology.

[0234] 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.

[0235] 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, or the like.

[0236] 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.

[0237] 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.

[0238] 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.

[0239] 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."

[0240] 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 changed in various ways.

[0241] <Maximum transmission power> The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0242] <Article> 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.

[0243] <"Different"> 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." [Industrial Applicability]

[0244] One aspect of the present disclosure is useful in wireless communication systems. [Explanation of symbols]

[0245] 10. Wireless communication systems 20 NG-RAN 100 base stations (gNB) 200 User Equipment (UE) 101,202 Transmitter 102,201 Receiver 103,203 Control unit

Claims

1. a communication unit that communicates using half-duplex time division duplex in a plurality of cells; a control unit that determines a reference cell from among the plurality of cells for each symbol for directional collision processing; Equipped with One cell among the plurality of cells is a cell capable of simultaneous communication of an uplink signal and a downlink signal, The control unit controls measurement of a downstream signal in the reference cell or in a cell other than the reference cell. A terminal having:

2. a communication unit that communicates using half-duplex time division duplex in a plurality of cells; a control unit that determines a reference cell from among the plurality of cells for each symbol for directional collision processing; Equipped with One cell among the plurality of cells is a cell capable of simultaneous communication of an uplink signal and a downlink signal, The control unit controls the upward or downward movement of symbols between the reference cell and other cells other than the reference cell. Terminal.

3. The frequency band of the reference cell and the other cells is the same. The terminal according to claim 2.

4. The frequency bands of the reference cell and the other cells are different. The terminal according to claim 2.

5. The device is communicating in a plurality of cells using half-duplex time division duplex; determining a reference cell from among the plurality of cells for each symbol for directional collision processing; One cell among the plurality of cells is a cell capable of simultaneous communication of an uplink signal and a downlink signal, Controlling measurement of downstream signals in the reference cell or other cells other than the reference cell; Communication method.

6. The device is communicating in a plurality of cells using half-duplex time division duplex; determining a reference cell from among the plurality of cells for each symbol for directional collision processing; One cell among the plurality of cells is a cell capable of simultaneous communication of an uplink signal and a downlink signal, Controlling the ascending or descending of symbols between the reference cell and other cells other than the reference cell. Communication method.

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