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

Abstract

Provided is a terminal including: a reception unit that receives at least one of information about setting a spatial relation of uplink transmission and information about transmission power control of uplink transmission, both of the information being set on the basis of a measurement result of cross-link interference (CLI) at a first terminal; and a control unit that, in accordance with the information received by the reception unit, performs at least one of the setting of the spatial relation of the uplink transmission and the transmission power control of the uplink transmission.

Description

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

[0001] The present invention relates to a terminal, a base station, and a wireless communication method in a wireless communication system.

[0002] For New Radio (NR) (also known as "5G"), the successor system to Long Term Evolution (LTE), technologies are being considered that meet the requirements of a large-capacity system, high-speed data transmission speed, low latency, simultaneous connection of a large number of terminals, low cost, and low power consumption.

[0003] In a TDD-based NR system, UL resources are scarce compared to DL resources, making it difficult to handle heavy traffic on the UL. Therefore, Full Duplex (FD), in which UL signals and DL signals are transmitted and received at the same time, is being studied in 3GPP RAN1 Release 18.

[0004] When UL signals and DL signals are transmitted and received at the same time and on the same frequency, ideally, twice the frequency utilization efficiency can be achieved compared to conventional methods. However, there is a possibility that cross link interference (CLI), which is interference between UL and DL, may degrade transmission quality.

[0005] NTT DOCOMO, "Views on Rel. 19 evolution of NR duplex operation," 3GPP TSG RAN WG1 #101, RP-232074, Sept. 2023.NTT DOCOMO, "New WID: Evolution of NR duplex operation: Sub-band full duplex (SBFD)," 3GPP TSG RAN WG1 #102, RP-234035, Dec. 2023.NTT DOCOMO, "Discussion on CLI handling for sub-band full duplex (SBFD)," 3GPP TSG RAN WG1 #116, R1-2401118, March 2024.3GPP TS38.213, V18.1.0, "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Physical layer procedures for control (Release) 18)," Dec. 2023.

[0006] CLI refers to interference occurring in a TDD system or the like, and may be, for example, interference between UL and DL caused by a base station 10 transmitting a downlink signal while another base station 10 is receiving an uplink signal. CLI also refers to interference occurring in a TDD system or the like, and may be, for example, interference between UL and DL caused by a terminal 20 transmitting an uplink signal while another terminal 20 is receiving a downlink signal.

[0007] In Subband Non-overlapping Full Duplex (SBFD), which is an FD in which subbands do not overlap on the base station (gNB) 10 side within the TDD band, the impact of CLI is relatively small. For this reason, SBFD is a work item of Release 19. In other words, standardization of SBFD is progressing in 3GPP.

[0008] There is a need for techniques to mitigate CLI in systems using FD or SBFD.

[0009] According to the disclosed technology, there is provided a terminal including: a receiver that receives at least one of setting information for spatial relationships of uplink transmission and transmission power control information for uplink transmission, which are set based on measurement results of link-to-link interference (CLI) in other terminals; and a controller that performs at least one of setting the spatial relationships of uplink transmission and controlling the transmission power of uplink transmission in accordance with the information received by the receiver.

[0010] The disclosed technology provides a technique for reducing CLI.

[0011] FIG. 1 is a diagram for explaining a wireless communication system in an embodiment. FIG. 2 is a diagram for explaining activating different spatial relations with different PUCCH resources for each TRP. FIG. 3 is a diagram for explaining an example (1) of PUSCH transmission for multiple TRPs in an embodiment. FIG. 4 is a diagram for explaining an example (2) of PUSCH transmission for multiple TRPs in an embodiment. FIG. 5 is a diagram for explaining an example of PUCCH transmission for multiple TRPs in an embodiment. FIG. 6 is a diagram for explaining an example of a TDD system. FIG. 7 is a diagram for explaining an example of a Sub-band based FD system. FIG. 8 is a diagram for explaining an example of a Spectrum sharing FD system. FIG. 9 is a diagram for explaining an example of a Sub-band based FD system. FIG. 10 is a diagram for explaining an example of a Spectrum sharing FD system. FIG. 11 is a diagram for explaining an example of scheduling that reduces the influence of CLI. FIG. 12 is a diagram for explaining an example of scheduling that reduces the influence of CLI. 1 is a diagram illustrating an example of the functional configuration of a base station 10, TRP 30-1, and TRP 30-2. FIG. 2 is a diagram illustrating an example of the functional configuration of a terminal 20. FIG. 3 is a flowchart illustrating an example of a CLI reduction process by the base station 10 (or the terminal 20). FIG. 4 is a flowchart illustrating an example of a process of notifying an updated path loss offset value. FIG. 5 is a diagram illustrating an example of a mathematical formula representing the transmission power to be used for transmission power control of PUSCH, PUCCH, SRS, and PRACH. FIG. 6 is a diagram illustrating an example of the functional configuration of a base station 10 in an embodiment. FIG. 7 is a diagram illustrating an example of the functional configuration of a terminal 20 in an embodiment. FIG. 8 is a diagram illustrating an example of the hardware configuration of a base station 10 and a terminal 20 according to an embodiment.

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0013] In the operation of the wireless communication system of the embodiment of the present invention, existing technology is used as appropriate. The existing technology is, for example, the existing New Radio (NR). That is, the base station 10 and terminal 20 described below basically operate in accordance with the existing NR specifications, but the operation related to the embodiment is modified from the operation in accordance with the existing NR specifications. Note that the embodiment is not limited to NR and can be applied to any wireless communication system.

[0014] In addition, in the embodiment, the duplex method may be a time division duplex (TDD) method, a frequency division duplex (FDD) method, or other methods (for example, flexible duplex, full duplex, etc.).

[0015] Furthermore, in the embodiments of the present invention, when radio parameters etc. are "configured," it may mean that predetermined values ​​are pre-configured, or that radio parameters notified from the base station 10 or the terminal 20 are set.

[0016] (System configuration)

[0017] Fig. 1 is a diagram for explaining a wireless communication system in an embodiment. As shown in Fig. 1, the wireless communication system in the embodiment of the present invention includes a base station 10 and a terminal 20. Although Fig. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each. In the embodiments described below, the Synchronization signal (SS), Primary SS (PSS), Secondary SS (SSS), Physical broadcast channel (PBCH), Physical random access channel (PRACH), Physical Downlink Control Channel (PDCCH), Physical Downlink Shared Channel (PDSCH), Physical Uplink Control Channel (PUCCH), Physical Uplink Shared Channel (PUSCH), Sounding Channel, etc. used in existing NR are used. Terms such as Reference Signal (SRS), Physical Sidelink Control Channel (PSCCH), Physical Sidelink Shared Channel (PSSCH), Physical Sidelink Feedback Channel (PSFCH), etc. are used for the sake of convenience of description, and similar signals, functions, etc. may be called by other names.

[0018] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a wireless signal are defined in the time domain and the frequency domain. The time domain may be defined by the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. The base station 10 transmits a synchronization signal, system information, etc. to the terminal 20. The synchronization signal is, for example, a PSS and an SSS. The system information is also called broadcast information.

[0019] As shown in Fig. 1, a base station 10 transmits control information or data to a terminal 20 via a downlink (DL) and receives control information or data from the terminal 20 via an uplink (UL). Both the base station 10 and the terminal 20 can transmit and receive signals by performing beamforming. Furthermore, both the base station 10 and the terminal 20 can apply Multiple Input Multiple Output (MIMO) communication to the DL or UL. Furthermore, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell) and a primary cell (PCell) using carrier aggregation (CA). Furthermore, the terminal 20 may perform communication via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using Dual Connectivity (DC).

[0020] The terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or a machine-to-machine (M2M) communication module. As shown in Fig. 1, the terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 also receives various reference signals transmitted from the base station 10 and measures the propagation path quality based on the reception results of the reference signals.

[0021] 2 is a diagram illustrating activation of different spatial relations in different PUCCH resources for each Transmit / Receive Point (TRP). As shown in FIG. 2, for each TRP (e.g., TRP1, TRP2), different spatial relations (e.g., spatial relation 1, spatial relation 2) are activated in different PUCCH resources (e.g., resource 1, resource 2). That is, in TRP1, spatial relation 1 is activated in resource 1, and spatial relation 2 is activated in resource 2 in TRP1. Note that, although two TRPs are shown in the example of Figure 2, the number of TRPs is not limited to two, and the number of TRPs may be one or more than two. For example, eight TRPs may be used.

[0022] 3 is a diagram illustrating an example (1) of PUSCH transmission for multiple TRPs in an embodiment. Repeated PUCCH or PUSCH transmission for multiple TRPs scheduled by a single DCI may be referred to as single DCI mTRP PUCCH / PUSCH transmission. Repeated PUCCH or PUSCH transmission may be transmitted to different TRPs.

[0023] As shown in Figure 3, two SRS-ResourceSets are configured for the codebook (CB) and non-codebook (NCB) by Radio Resource Control (RRC) signaling. Two power control parameters are configured by RRC signaling. Two SRS resource indicator (SRI) fields, two PTRS-DMRS fields, and two TPC fields are signaled by DCI.

[0024] 4 is a diagram illustrating an example (2) of PUSCH transmission for multiple TRPs in an embodiment. Fig. 4 shows an example in which four code points are set in the SRS-ResourceSet indicator field. The SRS-ResourceSet indicator field included in the DCI allows dynamic switching between S (Single)-TRP and M (Multiple)-TRP. As shown in Fig. 4, code point 0 corresponds to TRP1, code point 1 corresponds to TRP2, code point 2 corresponds to TRP1 and TRP2, and code point 3 corresponds to TRP2 and TRP1.

[0025] In the case of PUSCH, as shown in FIG. 3, two SRS-ResourceSets (whose usage is set to codebook (CB) or non-codebook (NCB)) are configured by RRC signaling. Each SRS-ResourceSet corresponds to a different TRP. When mTRP-PUSCH transmission is scheduled by one DCI, two SRIs are reported by the DCI. That is, one SRI is reported for each SRS-ResourceSet. By applying one of the two SRIs to each PUSCH repetition, a different beam is applied for each PUSCH repetition. That is, the beams are transmitted to different TRPs.

[0026] In the 3GPP NR specification, for example, operation of a frequency band of 52.6 GHz or higher is being considered. The currently specified frequency range (FR) 1 is a frequency band from 410 MHz to 7.125 GHz, and the subcarrier spacing (SCS) is 15, 30, or 60 kHz, with a bandwidth of 5 MHz to 100 MHz. FR2 is a frequency band from 24.25 GHz to 52.6 GHz, and the SCS uses 60, 120, or 240 kHz, with a bandwidth of 50 MHz to 400 MHz. For example, the newly operated frequency band may be from 52.6 GHz to 71 GHz. Furthermore, it may be considered to support frequency bands above 71 GHz.

[0027] 5 is a diagram illustrating an example of PUCCH transmission for multiple TRPs in an embodiment. As shown in FIG. 5, for the M-TRP PUCCH in FR2, two beams are enabled by the Medium Access Control-Control Element (MAC-CE) for one PUCCH resource. Also, for the M-TRP PUCCH in FR1, two power control parameters are enabled by the MAC-CE for one PUCCH resource.

[0028] In the case of PUCCH in FR2, 64 types of PUCCH-SpatialRelationInfo, which is a parameter used to set a path loss reference signal or the like that determines the beam of the PUCCH, are set by RRC signaling, and two of them are selected, i.e., enabled, by the MAC-CE. By applying one of the two PUCCH-SpatialRelationInfo selected by the MAC-CE, a different beam is applied for each PUCCH repeated transmission. In other words, it is transmitted to a different TRP. Note that the number of PUCCH-SpatialRelationInfo selected by the MAC-CE is not limited to two, and may be one or a number greater than two. For example, the number of PUCCH-SpatialRelationInfo selected by the MAC-CE may be eight.

[0029] In a TDD-based NR system, UL resources are scarce compared to DL resources, making it difficult to handle heavy traffic on the UL. Therefore, Full Duplex (FD), in which UL signals and DL signals are transmitted and received at the same time, is being studied in 3GPP RAN1 Release 18.

[0030] When UL signals and DL signals are transmitted and received at the same time and at the same frequency, ideally, twice the frequency utilization efficiency of conventional systems can be achieved. However, there is a possibility that cross link interference (CLI), which is interference between UL and DL, may degrade transmission quality. Here, CLI refers to interference that occurs in a TDD system or the like. For example, CLI may be interference between UL and DL caused by a base station 10 transmitting a downlink signal while another base station 10 is receiving an uplink signal. CLI may also refer to interference that occurs in a TDD system or the like. For example, CLI may be interference between UL and DL caused by a terminal 20 transmitting an uplink signal while another terminal 20 is receiving a downlink signal. Here, CLI refers to inter-link interference, and can also be interpreted as cross link interference.

[0031] Fig. 6 is a diagram showing an example of a TDD system. Possible options for extending the TDD system of Fig. 6 include an option (Opt A) in which the base station 10 is the only node performing FD operation (terminal 20 is half duplex), and an option (Opt B) in which the base station 10 and terminal 20 are the nodes performing FD operation.

[0032] FIG. 7 is a diagram showing an example of a sub-band based FD system, which is an option (Opt A-1) in which the DL frequency and the UL frequency do not overlap, among the options (Opt A) in which the base station 10 is the only node that performs FD operation (terminal 20 is half duplex).

[0033] FIG. 8 is a diagram showing an example of a spectrum sharing FD system, which is an option (Opt A-2) in which the DL frequency and the UL frequency overlap, among the options (Opt A) in which the base station 10 is the only node performing FD operations (terminal 20 is half duplex).

[0034] FIG. 9 is a diagram showing an example of a sub-band based FD system, which is an option (Opt B-1) in which the DL frequency and the UL frequency do not overlap, among the options (Opt B) in which the nodes performing FD operation are the base station 10 and the terminal 20.

[0035] FIG. 10 is a diagram showing an example of a spectrum sharing FD system, which is an option (Opt B-2) in which the DL frequency and the UL frequency overlap, among the options (Opt B) in which the nodes performing FD operation are the base station 10 and the terminal 20.

[0036] Among the various options described above, the impact of CLI is relatively small in Subband Non-overlapping Full Duplex (SBFD), which is an FD in which subbands do not overlap on the base station (gNB) 10 side within the TDD band, i.e., Opt A-1 shown in FIG. 7. For this reason, SBFD is a Work Item of Release 19. In other words, standardization of SBFD is progressing in 3GPP.

[0037] In the following embodiments, it is mainly assumed that SBFD is applied to the wireless communication system, but the duplex method of the communication system of the embodiments is not limited to SBFD and may be any of options Opt A-2, Opt B-1, and Opt B-2, or may be normal TDD.

[0038] The base station 10 using FD or SBFD receives UL signals and transmits DL signals simultaneously with a plurality of terminals (for example, terminal 20A and terminal 20B) with which it has formed links.

[0039] 11 is a diagram showing an example of scheduling that reduces the influence of CLI. For example, as shown in FIG. 11, when terminal 20A transmits a UL signal to base station 10 and gNB transmits a DL signal to terminal 20B at the same time, CLI occurs in terminal 20B due to the UL signal transmitted by terminal 20A.

[0040] In the example of FIG. 11, the terminal 20B has a function of measuring interference due to signals (SRS, dedicated interference measurement signals, etc.) transmitted from the terminal 20A, and feeding back the information to the base station 10.

[0041] In step S101 of Fig. 11, the terminal 20B measures the CLI and transmits the CLI measurement result to the base station 10. In step S102 of Fig. 11, the base station 10 uses the received CLI measurement result to schedule UL transmission so as to reduce the transmission quality due to the CLI. By performing such scheduling, the influence of the CLI is reduced.

[0042] However, according to the scheduling method shown in Fig. 11, the influence of CLI may be large depending on the relative positions of the terminals 20A and 20B. Therefore, when FD or SBFD is used, scheduling of UL transmission may become difficult, and the timing of UL transmission may be delayed.

[0043] FIG. 12 is a diagram showing an example of scheduling that reduces the effects of CLI. In the example shown in FIG. 12, FD or SBFD is applied to a distributed MIMO (Multi-TRP) system. Note that in the example shown in FIG. 12, terminals 20A and 20B are shown as examples of terminals 20, but the number of terminals 20 is not limited to the example shown in FIG. 12. The number of terminals 20 may be greater than two. Furthermore, the number of base stations 10 is not limited to the example shown in FIG. 12, and the number of base stations 10 may be two or more. Similarly, the number of TRPs 30 is not limited to the example shown in FIG. 12, and may be three or more.

[0044] In step S201 of FIG. 12, the terminal 20B measures the CLI and transmits the CLI measurement result to the base station 10. In step S202 of FIG. 12, the base station 10 uses the received CLI measurement result to instruct the terminal 20A to transmit a UL signal toward a TRP 30 (TRP 30-1 in the example of FIG. 12) that reduces the CLI to the terminal 20B receiving the DL signal. For example, the base station 10 may use a MAC CE to instruct the terminal 20A to activate a spatial relation for transmitting a UL signal to the TRP 30-1. Additionally or alternatively, the base station 10 may use RRC signaling and / or DCI to instruct the terminal 20A to activate a spatial relation for transmitting a UL signal to the TRP 30-1.

[0045] Additionally or alternatively, in order to mitigate the influence of CLI and improve resource utilization efficiency, the base station 10 may instruct the terminal 20A to limit its transmission power in step S202 of Fig. 12. For example, the base station 10 may use MAC CE to instruct the terminal 20A to limit its transmission power. Additionally or alternatively, the base station 10 may use RRC signaling and / or DCI to instruct the terminal 20A to limit its transmission power.

[0046] The terminal 20A controls the transmission power in accordance with the instruction from the base station 10 in step S202 of FIG. 12, and transmits the UL signal toward the instructed TRP 30 (TRP 30-1 in the example of FIG. 12).

[0047] The CLI measurement by the terminal 20B in step S201 of Fig. 12 may be performed by configuring the CLI measurement via RRC signaling from the base station 10. The CLI measurement result by the terminal 20B to the base station 10 may be reported periodically, aperiodically, or on an event basis. The CLI measurement result may include a measurement result for each SRS resource and one or more SRS resource indices. Additionally or alternatively, the CLI measurement result may include a measurement result for each CLI-Received Signal Strength Indicator (CLI-RSSI) resource and one or more CLS-RSSI resource indices. For example, in step S201 of FIG. 12 , the base station 10 receiving the CLI measurement result from the terminal 20B compares the measured power value for each SRS resource with a predetermined threshold, selects any SRS resource whose measured power value is equal to or less than the predetermined threshold, and in step S202, transmits an SRS resource index corresponding to the selected SRS resource to the terminal 20A, thereby indicating a beam to be used by the terminal 20A. The base station 10 may also use location information of the terminal 20B to determine a TRP 30 to be used by the terminal 20A to mitigate CLI, and notify the terminal 20A of the determined TRP 30 in step S202. For example, the base station 10 may use location information of the terminal 20B to estimate a line connecting the base station 10 and the terminal 20B, and determine the TRP 30 farthest from the line as the TRP 30 to be used by the terminal 20A to mitigate CLI. In addition, if the base station 10 has indicated the TRP30 that the terminal 20A should use by using the code point value of the SRS-ResourceSet indicator field before receiving the CLI measurement result from the terminal 20B, in step S202, the base station 10 may select a code point value other than the code point value and indicate the selected code point value to the terminal 20A in order to reduce the CLI.In this case, if the CLI is not mitigated, the base station 10 may select a code point value other than the above two code point values ​​and instruct the terminal 20A of the selected code point value in order to mitigate the CLI.

[0048] 12, the CLI-mitigating scheduling embodiment can mitigate the CLI influence between terminal 20A and terminal 20B in FD and SBFD, thereby shortening the delay until UL transmission in FD / SBFD, thereby improving the resource utilization efficiency of the entire system.

[0049] As a modification of FIG. 12 , the terminal 20A in FIG. 12 may be the base station 10, and the base station 10 in FIG. 12 may be the terminal 20A. In this case, the terminal 20A and the terminal 20B may perform direct terminal-to-terminal communication via a side link (SL) without going through the base station 10. The terminal 20B may measure the CLI and report the CLI measurement result to the terminal 20A via the side link. Based on the CLI measurement result, the terminal 20A may instruct the base station 10 to transmit a DL signal from the TRP 30 such that the CLI to the terminal 20B receiving the SL signal is reduced. In this case, the terminal 20A may be a relay UE, and the terminal 20B may be a remote UE.

[0050] This wireless communication system is composed of a base station 10, TRP 30-1, TRP 30-2, and terminal 20 (terminal 20A and terminal 20B), each of which has a control unit for reducing CLI in the terminal 20. Figure 13 is a diagram showing an example of the functional configuration of the base station 10, TRP 30-1, and TRP 30-2. Figure 13 is an example of the functional configuration, and the functional configuration of the base station 10, TRP 30-1, and TRP 30-2 is not limited to the example of Figure 13.

[0051] In the example shown in FIG. 13, the control unit of the base station 10 schedules the terminal 20A to transmit an UL signal toward a TRP 30 (and a beam) that reduces the CLI at the terminal 20B, based on the CLI measurement information between the terminals 20A and 20B fed back from the terminal 20B (this may involve setting the spatial relation of the terminal 20A).

[0052] In the example shown in FIG. 13, the control unit of the base station 10 may calculate the transmission power of the UL signal so as to reduce CLI and maximize the utilization efficiency of resources, and may control the terminal 20A to issue an instruction thereto.

[0053] Fig. 14 is a diagram showing an example of the functional configuration of the terminal 20 (terminal 20A). Fig. 14 is an example of the functional configuration, and the functional configuration of the terminal 20 (terminal 20A) is not limited to the example of Fig. 14.

[0054] In the example shown in Fig. 14, the control unit of the terminal 20 (terminal 20A) controls the transmission power in accordance with an instruction from the base station 10 and controls to transmit a UL signal toward the instructed TRP 30 (may also set the spatial relation instructed by the base station 10). Furthermore, the control unit of the terminal 20 (terminal 20A) may instruct the base station 10 to transmit a DL signal from a TRP 30 that reduces the CLI in the terminal 20B based on information on the measurement of the CLI between the base station 10 and the terminal 20B fed back from the terminal 20B (may also indicate the spatial relation to the base station 10).

[0055] 15 is a flowchart showing an example of a CLI reduction process by the base station 10 (or the terminal 20). The part 4.1 in the flowchart of FIG. 15 may correspond to the function of the base station 10 that instructs (schedules) the terminal 20A to transmit a UL signal to the TRP 30 that reduces the CLI in the terminal 20B based on the CLI information between the terminal 20A and the terminal 20B fed back from the terminal 20B in FIG. 12. Additionally, the part 4.1 in the flowchart of FIG. 15 may correspond to the function of the terminal 20A that instructs (schedules) the base station 10 to transmit a DL signal from the TRP 30 that reduces the CLI in the terminal 20B based on the CLI information between the base station 10 and the terminal 20B fed back from the terminal 20B in FIG. 12.

[0056] For example, a method for selecting a TRP 30 (and a beam) may be to select one or more TRPs 30 (and one or more beams) from among multiple TRPs 30 (and multiple beams) whose CLI is below a certain threshold. If it is clear that the CLI will be small due to the positional relationship of the TRPs 30 and / or the isolation of the beams, the TRPs 30 and beams may be selected even without CLI measurement results. Furthermore, if resource utilization efficiency can be improved, it is not necessary to select a TRP 30 that will have a small CLI.

[0057] The section 4.2 in the flowchart of FIG. 15 may correspond to a function in which the base station 10 controls the transmission power of the UL signal of the terminal 20A in FIG. 12 in order to mitigate CLI and maximize resource utilization efficiency. Additionally, the section 4.2 in the flowchart of FIG. 15 may correspond to a function in which the terminal 20A controls the transmission power of the DL signal of the base station 10 in order to mitigate CLI and maximize resource utilization efficiency. The transmission power control of the terminal 20A in FIG. 12 by the base station 10 can reduce CLI. When controlling the transmission power of the terminal 20A, the base station 10 may reset the modulation and coding scheme (MCS) for the terminal 20A and recalculate the resources required for the terminal 20A so that the terminal 20A can tolerate degradation in the signal-to-noise ratio (SNR) when receiving the UL signal from the terminal 20A in FIG. 12. The base station 10 may instruct the power that maximizes resource utilization efficiency, taking into consideration the CLI reduction effect and SNR degradation.

[0058] In step S301 of FIG. 15, the base station 10 schedules UL resources for the terminal 20A of FIG. 12 in response to a request from the terminal 20B of FIG.

[0059] 15, the base station 10 determines whether or not to perform CLI reduction processing. If the base station 10 determines in step S302 that CLI reduction processing is to be performed, the process proceeds to step S303. If the base station 10 determines in step S302 that CLI reduction processing is not to be performed, the process proceeds to step S308.

[0060] 15, the base station 10 determines whether there are CLI measurement results that can be used for the CLI reduction process. If the base station 10 determines in step S303 that there are CLI measurement results that can be used for the CLI reduction process, the process proceeds to step S304. If the base station 10 determines in step S303 that there are no CLI measurement results that can be used for the CLI reduction process, the process proceeds to step S308.

[0061] In step S304 of Fig. 15, the base station 10 reschedules the UL resources of the terminal 20A of Fig. 12 so as to use the TRP 30 (and beam) that takes CLI into consideration. When the rescheduling of the UL resources is completed, the process proceeds to step S305.

[0062] In step S305 of Fig. 15, the base station 10 determines whether or not to perform transmission power control for the terminal 20A of Fig. 12. If the base station 10 determines in step S305 to perform transmission power control for the terminal 20A, the process proceeds to step S306. If the base station 10 determines in step S305 not to perform transmission power control for the terminal 20A, the process proceeds to step S308.

[0063] In step S306 of Fig. 15, the base station 10 recalculates the MCS and necessary resources associated with the transmission power control of the terminal 20A of Fig. 12, and performs rescheduling for the terminal 20A so as to maximize resource utilization efficiency. When rescheduling for the terminal 20A is completed, the process proceeds to step S307.

[0064] In step S306 of Figure 15, the base station 10 notifies the terminal 20A of Figure 12 of transmission power information and resource information (TRP30 to which the terminal 20A should transmit the UL signal, and the beam to be used when the terminal 20A transmits the UL signal), and the processing ends.

[0065] In step S308 of Figure 15, the base station 10 notifies the terminal 20B of Figure 12 of resource information (TRP30 to which the terminal 20A should transmit the UL signal, and the beam to be used when the terminal 20A transmits the UL signal), and the processing ends.

[0066] By performing the processing of FIG. 15 , UL resource optimization taking into account the influence of CLI is realized. In the above description of the processing of FIG. 15 , the base station 10 performs the CLI reduction processing. However, the embodiment is not limited to this example, and the terminal 20 may perform the CLI reduction processing. Also, in the processing of FIG. 15 , 4.1 and 4.2 are performed, but the embodiment is not limited to this example. For example, as a modification of the CLI reduction processing of FIG. 15 , the base station 10 may perform only steps S301, S302, S303, S304, S307, and S308. That is, the base station 10 may perform only part 4.1 of the CLI reduction processing of FIG. 15 . Also, as a modification of the CLI reduction processing of FIG. 15 , the base station 10 may perform only steps S301, S305, S306, S307, and S308. That is, the base station 10 may execute only part 4.2 as the CLI reduction process in FIG.

[0067] When controlling the transmission power of UL signals, it is necessary for the base station 10 to notify the terminal 20 of the transmission power. New power control information for mitigating CLI may be notified, but, for example, a method is considered in which the base station 10 updates the path loss offset value and notifies the updated path loss offset value. The path loss offset value is calculated based on the normal propagation loss between the terminal 20 and the base station 10 so as not to excessively increase the transmission power of the terminal 20.

[0068] 16 is a flowchart showing an example of a process for notifying an updated path loss offset value. The section 4.3 in the flowchart of FIG. 16 may correspond to a function in which the base station 10 instructs the transmission power of the UL signal of the terminal 20A in FIG. 12 by adding an additional offset for CLI mitigation to the path loss offset value in order to mitigate CLI. Additionally, the section 4.3 in the flowchart of FIG. 16 may correspond to a function in which the terminal 20A in FIG. 12 instructs the transmission power of the DL signal of the base station 10 by adding an additional offset for CLI mitigation to the path loss offset value. The terminal 20 has a function of controlling the transmission power in accordance with the instruction from the base station 10 and controlling the transmission of the UL signal toward the instructed TRP 30.

[0069] In step S401 of FIG. 16, the base station 10 notifies the terminal 20A of the path loss offset value based on the SRS transmitted from the terminal 20A of FIG.

[0070] In step S402 of Fig. 16, the base station 10 determines whether or not to perform transmission power control of the terminal 20A of Fig. 12 to reduce CLI. If the base station 10 determines in step S402 to perform transmission power control of the terminal 20A, the process proceeds to step S403. If the base station 10 determines in step S402 not to perform transmission power control of the terminal 20A, the process proceeds to step S404.

[0071] 16, the base station 10 updates the path loss offset value. When the updating of the path loss offset value is completed, the process proceeds to step S404.

[0072] In step S404 of Fig. 16, the base station 10 notifies the terminal 20A of Fig. 12 of the path loss offset value. Then, the processing ends.

[0073] 17 is an example of a formula expressing the transmission power to be used for the transmission power control of the PUSCH, PUCCH, SRS, and PRACH. As shown in FIG. 17, a term for CLI reduction, offset CLI, is newly added to the formula expressing the transmission power to be used for the transmission power control of the PUSCH, PUCCH, SRS, and PRACH. ｂ，ｆ，ｃ may be added.

[0074] Offset CLI ｂ，ｆ，ｃ is the measured CLI (CLI ｍｅａｓ ), for example, the CLI may be determined so that it is equal to or less than a reference threshold (T). ｂ，ｆ，ｃ = T - CLI ｍｅａｓ In the example of FIG. 12, the terminal 20B measures the CLI and the measured CLI (CLI ｍｅａｓ ) to the base station 10. The base station 10 transmits the offset CLI ｂ，ｆ，ｃ Calculate.

[0075] The reference threshold (T) is set to a value that prevents degradation of reception characteristics due to CLI in terminal 20B of Fig. 12, but may also be set to a value that prevents significant degradation of reception characteristics in base station 10 due to a decrease in transmission power of terminal 20A of Fig. 12. If degradation of reception characteristics in base station 10 due to a decrease in transmission power of terminal 20A of Fig. 12 becomes greater than degradation of reception characteristics due to CLI in terminal 20B of Fig. 12, transmission power control may not be performed. Furthermore, base station 10 may recalculate MCS and / or select beams in addition to transmission power control so as to maximize resource utilization efficiency.

[0076] In the above-described embodiment, the base station 10 may adjust not only UL scheduling but also DL scheduling, taking into account the influence of CLI. Taking into account interference between gNBs, DL signal scheduling and gNB power control may be performed in the same manner as described above. The terms base station, gNB, transmission / reception point (TRP), and distributed antenna (DA) may be interchangeable. DL / UL signals may be transmitted to a single base station / TRP / DA / UE, or may be transmitted simultaneously to multiple base stations / TRPs / DAs / UEs.

[0077] In the above-described embodiments, a device expressed as a "base station" can be interchangeably replaced with terms such as a "radio base station," "NodeB," "eNodeB," "gNodeB," "access point," "cell," "macrocell," "small cell," "femtocell," "picocell," etc. In the above-described embodiments, a device expressed as a "Transmit / Receive Point (TRP)" can be interchangeably replaced with terms such as a "Remote Radio Unit (RRU)," "Radio Unit (RU)," "Distributed Antenna (DA)," "antenna," "panel," "Transmission Point (TRP)," "Reception Point (RP)," etc.

[0078] (Device Configuration) Next, a functional configuration example of the base station 10 and the terminal 20 that execute the processes and operations described above will be described. The base station 10 and the terminal 20 include functions for implementing the above-described embodiments. However, the base station 10 and the terminal 20 may each include only a part of the functions of the embodiments.

[0079] <Base Station 10> Fig. 18 is a diagram showing an example of the functional configuration of the base station 10 in the embodiment. As shown in Fig. 18, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Fig. 18 is merely an example. The names of the functional divisions and functional units may be any as long as they can perform the operations related to the embodiment.

[0080] The transmitter 110 has a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. The transmitter 110 also transmits inter-network node messages to other network nodes. The receiver 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of higher layers from the received signals. The transmitter 110 also has a function of transmitting PSS, SSS, PBCH, DL / UL control signals, etc. to the terminal 20. The receiver 120 also receives inter-network node messages from other network nodes.

[0081] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20. The setting information includes, for example, information related to CLI reduction processing.

[0082] As described in the embodiment, the control unit 140 controls the CLI mitigation process. The control unit 140 also executes scheduling. The signal transmission functional unit in the control unit 140 may be included in the transmitting unit 110, and the signal reception functional unit in the control unit 140 may be included in the receiving unit 120.

[0083] <Terminal 20> Fig. 19 is a diagram showing an example of the functional configuration of the terminal 20 in the embodiment. As shown in Fig. 19, the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Fig. 19 is merely an example. The names of the functional divisions and functional units may be any as long as they can execute the operations related to the embodiment.

[0084] The transmitter 210 generates a transmission signal from transmission data and transmits the transmission signal wirelessly. The receiver 220 receives various signals wirelessly and acquires higher layer signals from the received physical layer signals. The receiver 220 also has a function of receiving PSS, SSS, PBCH, DL / UL / SL control signals, etc. transmitted from the base station 10. Also, for example, the transmitter 210 transmits a Physical Sidelink Control Channel (PSCCH), a Physical Sidelink Shared Channel (PSSCH), a Physical Sidelink Discovery Channel (PSDCH), a Physical Sidelink Broadcast Channel (PSBCH), or the like to another terminal 20 as D2D communication, and the receiver 220 receives the PSCCH, PSSCH, PSDCH, or PSBCH, or the like, from the other terminal 20.

[0085] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220. The setting unit 230 also stores setting information that is set in advance. The setting information includes, for example, information related to CLI mitigation processing.

[0086] As described in the embodiment, the control unit 240 controls the CLI mitigation process. The signal transmission function in the control unit 240 may be included in the transmitting unit 210, and the signal reception function in the control unit 240 may be included in the receiving unit 220.

[0087] (Hardware Configuration) The block diagrams (FIGS. 18 and 19) 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 be realized by combining software with the single device or the multiple devices.

[0088] Functions include, but are not limited to, judgment, determination, assessment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0089] For example, the base station 10, the terminal 20, etc. in the embodiments may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 20 is a diagram showing an example of the hardware configuration of the base station 10 and the terminal 20 according to the embodiments. The base station 10 and the terminal 20 described above may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0090] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of the base station 10 and the terminal 20 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.

[0091] Each function in the base station 10 and the terminal 20 is realized by loading specified software (programs) onto hardware such as the processor 1001, the memory device 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls at least one of reading and writing data in the memory device 1002 and the auxiliary memory device 1003.

[0092] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured as 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 140, control unit 240, etc. may be realized by the processor 1001.

[0093] Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002 and executes various processes in accordance with the programs. 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 140 of the base station 10 shown in FIG. 18 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. Furthermore, for example, the control unit 240 of the terminal 20 shown in FIG. 19 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. 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.

[0094] The storage device 1002 is a computer-readable recording medium and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), a Random Access Memory (RAM), etc. The storage device 1002 may also be called a register, a cache, a main memory, etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing the communication method according to the embodiment.

[0095] The secondary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray® disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. The above-mentioned storage medium may be, for example, a database, a server, or other suitable medium including at least one of the storage device 1002 and the secondary storage device 1003.

[0096] 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, a communication module, etc. 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, a transmission / reception antenna, an amplifier unit, a transmission / reception unit, a transmission path interface, etc. may be realized by the communication device 1004. The transmission / reception unit may be implemented as a transmission unit and a reception unit that are physically or logically separated.

[0097] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0098] Furthermore, each device such as the processor 1001 and the storage device 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.

[0099] Furthermore, the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0100] As described above, according to the embodiment, there is provided a terminal including: a receiver that receives at least one of setting information for a spatial relationship of uplink transmission and transmission power control information for uplink transmission, which are set based on a measurement result of link-to-link interference (CLI) in another terminal; and a controller that performs at least one of setting the spatial relationship of the uplink transmission and controlling the transmission power of the uplink transmission in accordance with the information received by the receiver.

[0101] According to the above configuration, it is possible to mitigate CLI by changing the spatial relationship of uplink transmission or controlling the transmission power of uplink transmission based on the CLI measurement results by other terminals.

[0102] The spatial relationship setting information may include at least one of an instruction to switch a beam and an instruction to switch a Transmit / Receive Point (TRP) to be used. With this configuration, CLI can be reduced by switching the beam and / or switching the TPR.

[0103] The transmission power control information may include a path loss offset value that is changed based on the CLI measurement result. With this configuration, it is possible to mitigate CLI by controlling the transmission power of uplink transmission.

[0104] Also, according to an embodiment, a base station is provided that includes: a receiving unit that receives a measurement result of link interference (CLI) transmitted from a first terminal; and a transmitting unit that transmits at least one of spatial relationship setting information for uplink transmission of a second terminal and transmission power control information for uplink transmission of the second terminal to the second terminal based on the measurement result of the CLI.

[0105] According to the above configuration, it is possible to mitigate CLI by changing the spatial relationship of uplink transmissions by the second terminal or controlling the transmission power of uplink transmissions by the second terminal based on the CLI measurement results by the first terminal.

[0106] According to an embodiment, there is provided a wireless communication method by a terminal, the method comprising: receiving at least one of information on setting a spatial relationship of uplink transmission and information on transmission power control of uplink transmission, the information being set based on a measurement result of link-to-link interference (CLI) by another terminal; and performing at least one of setting the spatial relationship of uplink transmission and controlling the transmission power of uplink transmission in accordance with the received information. According to the above configuration, it is possible to mitigate CLI by changing the spatial relationship of uplink transmission or controlling the transmission power of uplink transmission based on a measurement result of CLI by the other terminal.

[0107] According to another embodiment, there is provided a wireless communication method by a base station, comprising: receiving a measurement result of link interference (CLI) transmitted from a first terminal; and transmitting, to the second terminal, at least one of spatial relationship setting information for uplink transmission of a second terminal and transmit power control information for uplink transmission of the second terminal based on the measurement result of the CLI. According to the above configuration, it is possible to mitigate CLI by changing the spatial relationship of uplink transmission of the second terminal or controlling the transmit power of uplink transmission of the second terminal based on the measurement result of the CLI by the first terminal.

[0108] (Supplementary Notes on the Embodiments) Although the above describes examples, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; matters described in two or more items may be used in combination as needed, and matters described in one item may apply to matters described in another item (as long as there is no contradiction). Boundaries between functional units or processing units in functional block diagrams do not necessarily correspond to boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 have been described using functional block diagrams, but such devices may be realized in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to the embodiment and the software operated by the processor of the terminal 20 according to the embodiment may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

[0109] Furthermore, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., 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, such as an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0110] Each aspect / embodiment described in this disclosure may be implemented in accordance with standards such as Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), new Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11a, IEEE 802.11b, IEEE 802.11b, IEEE 802.11c, IEEE 802.11b ...c, IEEE 802.11b, IEEE The present invention may be applied to at least one of systems using 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-Wide Band (UWB), Bluetooth (registered trademark), or other appropriate systems, and next-generation systems extended based on these. Furthermore, the present invention may be applied to a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.).

[0111] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described herein may be rearranged 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.

[0112] In this specification, a specific operation described as being performed by the base station 10 may be performed by its upper node in some cases. In a network consisting of one or more network nodes having the base station 10, it is clear that various operations performed for communication with the terminal 20 may be performed by at least one of the base station 10 and another network node other than the base station 10 (such as, 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 10, the other network node may be a combination of multiple other network nodes (such as an MME and an S-GW).

[0113] The information, signals, etc. described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input / output via multiple network nodes.

[0114] 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 transmitted to another device.

[0115] In the present disclosure, the determination may be made by a value represented by one bit (0 or 1), by a Boolean value (true or false), or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0116] 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.

[0117] 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.

[0118] 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.

[0119] Note that terms described in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0120] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0121] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by an index.

[0122] 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.

[0123] In the present disclosure, terms such as "base station (BS)," "radio base station," "base station device," "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. A base station may also be referred to by terms such as a macrocell, a small cell, a femtocell, and a picocell.

[0124] 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 partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication services within that coverage.

[0125] 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.

[0126] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0127] 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.

[0128] At least one of the base station and the mobile station may be called 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 body, the mobile body itself, etc. The mobile body is a movable object, and the moving speed is arbitrary. This also naturally includes the case where the mobile body is stationary.

[0129] Furthermore, the base station in the present disclosure may be read as a user 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 user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). In this case, the terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0130] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station may be configured to have the functions of the user terminal described above.

[0131] 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.

[0132] 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.

[0133] The reference signal may also be abbreviated as RS, and may be called a pilot depending on the applicable standard.

[0134] 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."

[0135] 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.

[0136] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0137] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0138] A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0139] Numerology may be communication parameters that apply to the transmission and / or reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, specific windowing operations performed by the transceiver in the time domain, etc.

[0140] A slot may consist of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol). A slot may be a time unit based on numerology.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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 wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units. Note that the definition of TTI is not limited to this.

[0145] 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.

[0146] 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.

[0147] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0148] 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 greater than or equal to 1 ms.

[0149] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0150] 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.

[0151] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0152] 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.

[0153] 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 BWP and numbered within the BWP.

[0154] 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.

[0155] 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."

[0156] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples, and various changes may be made to 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.

[0157] 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.

[0158] 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."

[0159] The aspects / embodiments described in this disclosure may be used alone, in combination, or switched depending on the implementation. Notification of predetermined information (e.g., notification that "X is true") is not limited to explicit notification, but may be implicit (e.g., not notifying the predetermined information).

[0160] The setting of the spatial relationship in the terminal 20 may refer to the setting of a precoding matrix for transmitting and receiving radio signals in the terminal 20, the setting of a beam for transmitting and receiving radio signals in the terminal 20, the setting of a spatial filter for transmitting and receiving radio signals in the terminal 20, the setting of an antenna port for transmitting and receiving radio signals in the terminal 20, the setting of a Quasi-Co-Location (QCL) parameter for transmitting and receiving radio signals in the terminal 20, the setting of a Transmission Configuration Indication (TCI) in the terminal 20, or the setting of a panel for transmitting and receiving radio signals in the terminal 20.

[0161] The setting of the spatial relationship in the base station 10 and / or TRP 30 may refer to the setting of a precoding matrix for transmitting and receiving radio signals in the base station 10 and / or TRP 30, the setting of a beam for transmitting and receiving radio signals in the base station 10 and / or TRP 30, the setting of a spatial filter for transmitting and receiving radio signals in the base station 10 and / or TRP 30, the setting of an antenna port for transmitting and receiving radio signals in the base station 10 and / or TRP 30, the setting of a Quasi-Co-Location (QCL) parameter for transmitting and receiving radio signals in the base station 10 and / or TRP 30, the setting of a Transmission Configuration Indication (TCI) in the base station 10 and / or TRP 30, or the setting of a panel for transmitting and receiving radio signals in the base station 10 and / or TRP 30.

[0162] 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.

[0163] 10 Base station 110 Transmitter 120 Receiver 130 Setting unit 140 Controller 20 Terminal 210 Transmitter 220 Receiver 230 Setting unit 240 Controller 30 TRP 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device

Claims

1. A terminal comprising: a receiver that receives at least one of information on spatial relationship setting for uplink transmission and information on transmission power control for uplink transmission, which information is set based on measurement results of link-to-link interference (CLI) in another terminal; and a controller that performs at least one of setting the spatial relationship for uplink transmission and controlling the transmission power for uplink transmission in accordance with the information received by the receiver.

2. The terminal according to claim 1, wherein the spatial relationship setting information includes at least one of an instruction to switch beams and an instruction to switch Transmit / Receive Points (TRPs) to be used.

3. The terminal according to claim 1, wherein the transmission power control information includes a path loss offset value that is changed based on the measurement result of the CLI.

4. A base station comprising: a receiving unit that receives a measurement result of link interference (CLI) transmitted from a first terminal; and a transmitting unit that transmits at least one of spatial relationship setting information for uplink transmission of a second terminal and transmission power control information for uplink transmission of the second terminal to the second terminal based on the measurement result of the CLI.

5. A wireless communication system comprising a base station, a first terminal, and a second terminal, wherein the base station comprises: a receiver that receives measurement results of link interference (CLI) transmitted from the first terminal; and a transmitter that transmits at least one of spatial relationship setting information for uplink transmission of the second terminal and transmission power control information for uplink transmission of the second terminal to the second terminal based on the measurement results of CLI.

6. A wireless communication method by a terminal, comprising: a step of receiving at least one of information on spatial relationship setting for uplink transmission and information on transmission power control for uplink transmission, which information is set based on measurement results of link-to-link interference (CLI) in another terminal; and a step of performing at least one of setting the spatial relationship for uplink transmission and controlling the transmission power for uplink transmission according to the received information.

7. A wireless communication method by a base station comprising: a step of receiving a measurement result of link interference (CLI) transmitted from a first terminal; and a step of transmitting at least one of spatial relationship setting information for uplink transmission of a second terminal and transmission power control information for uplink transmission of the second terminal to the second terminal based on the measurement result of the CLI.

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