Terminal and wireless communication method

Abstract

A terminal according to one embodiment of the present disclosure is characterized by comprising: a receiving unit that receives a first downlink (DL) signal indicating the presence or absence of a carrier indicator field (CIF) from a transmission / reception point; and a control unit that determines a transmission destination of an uplink (UL) signal from the transmission / reception point and a reception point based on the presence or absence of the CIF. According to one embodiment of the present disclosure, appropriate communication can be implemented.

Description

Technical Field

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

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized to achieve even higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) has been standardized to further enhance the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Releases (Rel.) 8 and 9).

[0003] Successor systems to LTE (for example, also referred to as fifth-generation mobile communication system (5G), 5G+ (plus), New Radio (NR), 3GPP Rel. 15 and later, etc.) are also under study.

[0004] In existing LTE systems (e.g., 3GPP Rel. 8-14), user terminals (User Equipment (UE)) use at least one of the UL data channel (e.g., Physical Uplink Shared Channel (PUSCH)) and the UL control channel (e.g., Physical Uplink Control Channel (PUCCH)) to send uplink control information (Uplink Control Information (UCI)).

[0005] Prior art literature

[0006] Non-patent literature

[0007] Non-Patent Document 1: 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention

[0008] Problems to be solved by the invention

[0009] In future wireless communication systems (e.g., NR), research is underway to set up reception points (reception points (RP), Rx points) that mainly receive signals, in addition to transmission / reception points (TRP, central TRP).

[0010] However, research has not yet been conducted on communication methods in an environment where there are reception points in addition to the transmission and reception points. For example, research has not yet been conducted on how to determine the destination of a signal transmitted by a terminal.

[0011] Therefore, one of the objects of the present disclosure is to provide a terminal and a wireless communication method that can perform appropriate communication in an environment where a reception point exists in addition to a transmission and reception point.

[0012] Means for solving problems

[0013] A terminal involved in one embodiment of the present invention is characterized in that it comprises: a receiving unit that receives a first downlink (DL) signal indicating the presence or absence of a carrier indicator field (CIF) from a transmitting and receiving point; and a control unit that determines the sending destination of an uplink (UL) signal from the transmitting and receiving point and the receiving point based on the presence or absence of the CIF.

[0014] Effects of the Invention

[0015] According to one aspect of the present disclosure, appropriate communication can be performed in an environment where a reception point exists in addition to a transmission / reception point. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a diagram showing an example of a wireless communication system including a transmission and reception point and a reception point.

[0017] Figure 2 This is a diagram showing a first example of a method for determining a transmission destination of a UL signal according to a CIF value.

[0018] Figure 3 This is a diagram showing a second example of a method for determining a transmission destination of a UL signal according to a CIF value.

[0019] Figure 4 This is a diagram showing a third example of a method for determining a transmission destination of a UL signal according to a CIF value.

[0020] Figure 5 This is a diagram showing a fourth example of a method for determining a transmission destination of a UL signal according to a CIF value.

[0021] Figure 6 This is a diagram showing a fifth example of a method for determining a transmission destination of a UL signal according to a CIF value.

[0022] Figure 7 This diagram shows an example in which a field indicating the transmission destination of a UL signal is added to DCI format 0_1.

[0023] Figure 8 This is a diagram showing an example of cross-carrier scheduling using DCI.

[0024] Figure 9 It is a diagram showing an application example of cross-carrier scheduling.

[0025] Figure 10 This is a diagram showing an example of a schematic configuration of a wireless communication system according to one embodiment.

[0026] Figure 11 This is a diagram showing an example of the configuration of a base station according to one embodiment.

[0027] Figure 12 This is a diagram showing an example of the configuration of a user terminal according to one embodiment.

[0028] Figure 13 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment. DETAILED DESCRIPTION

[0029] (UL coverage)

[0030] In Rel.15 NR, the coverage (reach) of PUSCH, PUCCH, PRACH, PDSCH, PDCCH, and PBCH is uneven. In particular, PUSCH coverage is limited in high-frequency coverage. Research is underway to improve at least one of UL coverage and UL throughput in future wireless communication systems (e.g., Rel.16, Rel.17, or later).

[0031] Figure 1 FIG is a diagram showing an example of a wireless communication system including a transmitting and receiving point and a receiving point. Figure 1 As shown, in addition to the transmission / reception point (TRP) and central TRP, a reception point (RP) and Rx point (Rx point) can also be set. The reception point can also be connected to the TRP (e.g., base station, etc.) or the core network via wired or wireless communication. The reception point can also be treated as a network or base station. In addition, the central TRP and reception point in this disclosure are equivalent to the base station 10 described later.

[0032] The receiving point may not include part of the structure (capabilities, functions, etc.) of the central TRP. At least one of the functions of transmitting DL data, transmitting SS / PBCH blocks, and transmitting DL data may be omitted at the receiving point. The number of structures of at least one of the antenna, panel, and radio frequency (RF) unit (RF chain, RF circuit) at the receiving point may be less than the number of such structures in the central TRP. The maximum transmit power of DL may also be lower. The UE may also receive a DL signal from the central TRP and, based on the DL signal, transmit an UL signal to the receiving point.

[0033] However, research has not yet been conducted on how to determine the destination of signals sent by a terminal in an environment where there are reception points other than the transmission and reception point (central TRP). For example, the scheduling method for cases where the central TRP and the component carriers (CCs) of the reception points are different or equal has not been studied.

[0034] Therefore, the inventors of the present invention have conceived of the following terminal (UE), which has: a receiving unit that receives a first DL signal indicating the presence or absence of a carrier indicator field (CIF) from a central TRP; and a control unit that determines the sending destination of the UL signal from a transmitting and receiving point and a receiving point based on the presence or absence of the CIF. According to one embodiment of the present disclosure, appropriate communication can be implemented in an environment where there are receiving points in addition to the central TRP. For example, it is possible to appropriately determine the scheduling method when the component carriers (CCs) of the central TRP and the receiving point are different or equal, and appropriately determine the sending destination of the signal sent by the UE.

[0035] The following describes the embodiments of the present disclosure in detail with reference to the accompanying drawings. The wireless communication methods of each embodiment can be applied individually or in combination. In addition, in the present disclosure, "A / B" can also be replaced with "at least one of A and B".

[0036] The UL signal in the present disclosure may also be replaced by any UL channel / UL signal, for example, it may also be at least one of the uplink shared channel (Physical Uplink Shared Channel (PUSCH)), the uplink control channel (Physical Uplink Control Channel (PUCCH)), the random access channel (Physical Random Access Channel (PRACH)), etc.

[0037] (Wireless Communication Method)

[0038] The UE may also identify (and may be set to) a TRP mode. Multiple candidates for the TRP mode may also include a distributed TRP mode and a localized TRP mode. Distributed TRP mode, use of receiving points, sending a specific type of UL signal to the receiving points, multiple TRP modes, and UL dense deployment may also be replaced with each other. Localized TRP mode, no use of receiving points, sending a specific type of UL signal using an existing method, sending a specific type of UL signal to a central TRP, single TRP mode, central TRP mode, and general deployment may also be replaced with each other.

[0039] <First embodiment>

[0040] The UE receives a first DL signal indicating the presence or absence of a CIF from the center TRP, and determines the destination of the UL signal from the center TRP and the reception point based on the presence or absence of the CIF. The first DL signal may also be, for example, higher-level signaling (e.g., Radio Resource Control (RRC) signaling) transmitted from the center TRP. The higher-level signaling may also include an RRC parameter "cif-Presence" related to the presence or absence of a CIF in the DCI format. In the first embodiment, the component carrier (CC) applied to the center TRP and the CC applied to the reception point are common (equal).

[0041] (Method 1-1)

[0042] Method 1-1 describes an example in which "false" is set for "cif-Presence" in higher-level signaling sent from the central TRP. Setting "false" for "cif-Presence" in higher-level signaling sent from the central TRP can also indicate that the CIF does not exist in the DCI (the CIF field is 0 bits).

[0043] If "cif-Presence" is set to "false" in the transmitted higher-level signaling, the UE may determine the UL signal's destination as the central TRP. Furthermore, in this case, the UE may not assume that the UL signal will be transmitted to the receiving point. Furthermore, in this case, the UE may not assume the application of cross-carrier scheduling (CCS).

[0044] Furthermore, when "cif-Presence" is set to "false" in the higher-level signaling sent from the central TRP and the distributed TRP mode is set in the higher-level parameters sent from the central TRP, the UE may determine the UL signal transmission destination as a reception point. In this case, the UE may also assume that the Rx point ID (Identifier (ID)) representing the reception point is set by a higher-level parameter. This higher-level parameter may also be replaced by a Medium Access Control Control Element (MAC CE) or Downlink Control Information (DCI).

[0045] (Method 1-2)

[0046] Method 1-2 describes an example in which "cif-Presence" is set to "true" in higher-level signaling sent from the central TRP. In this method, the UE receives a second DL signal (e.g., DCI or higher-layer parameters) indicating the CIF value and determines the UL signal transmission destination based on the CIF value.

[0047] Setting "true" for "cif-Presence" in higher-level signaling sent from the central TRP can also indicate the presence of a CIF in the DCI (including a CIF field that is not 0 bits). "CIF presence" can also be replaced with "a value of X bits (X is not 0) set as CIF." The value of X can be predefined or set by DCI or higher-layer parameters. For example, the value of X is 5.

[0048] When “cif-Presence” is set to “true” in the transmitted higher-level signaling, the UE may also assume application of cross-carrier scheduling (CCS).

[0049] In addition, when "cif-Presence" is set to "true" in the transmitted higher-level signaling, the UE can also assume that the cell ID set in the cross-carrier scheduling configuration (CrossCarrierSchedulingConfig) in the higher-level signaling (for example, RRC) corresponds to the CIF.

[0050] In the case of a CIF with X bits (X is other than 0), the UE may also assume, for example, that the upper (or lower) Y bits of the CIF correspond to the Rx point ID, and that the lower (or upper) XY bits of the CIF represent the ID of the center TRP (which may also be renamed as TRP ID, etc.). In this case, if all the Y bits are specific values ​​(e.g., 0, 1), the UE may also decide to send the UL signal to the center TRP. In addition, if one of the Y bits is other than the above-mentioned specific value (e.g., 0), the UE may also decide to send the UL signal to the reception point. The value of Y may be predetermined or set by a higher-layer parameter. The value of Y may also be 2, for example.

[0051] Figure 2 This is a diagram showing a first example of a method for determining a transmission destination of a UL signal according to a CIF value. Figure 3 1 is a diagram showing a second example of a method for determining a transmission destination of a UL signal according to a CIF value. Figure 2 as well as Figure 3 In the example shown, a 5-bit value is set as the CIF value. The upper two bits of the 5-bit value represent the Rx point ID, and the lower three bits represent the center TRP ID. That is, X = 5, Y = 2. Furthermore, if the upper two bits are all 0, the UE determines the center TRP as the destination for UL signals. If any one of the upper two bits is other than 0, the UE determines the destination for UL signals as the reception point.

[0052] exist Figure 2 In the example shown, the CIF value set in the DL signal is "01001." That is, one of the upper two bits is other than 0, so the UE determines the UL signal's transmission destination to be the reception point. Furthermore, the UE determines the UL signal's transmission destination to be the reception point whose Rx point ID is set to "01."

[0053] exist Figure 3 In the example shown, the CIF value set in the DL signal is "00001." That is, the upper two bits are all 0, so the UE determines the transmission destination of the UL signal to be the center TRP.

[0054] In addition, when the CIF is set with X bits (X is other than 0), the UE can also assume that the upper Y bits of the CIF correspond to the ID of the center TRP and the lower XY bits of the CIF represent the Rx point ID.

[0055] For example, the UE may decide to transmit the UL signal to the center TRP when the number of bits of the set CIF is less than Z bits, and decide to transmit the UL signal to the reception point when the number of bits of the set CIF is Z bits or greater than Z bits, and decide to transmit the UL signal to the reception point when the number of bits of the set CIF is not Z bits.

[0056] When deciding to send an UL signal to a reception point, the UE may also assume that the CIF value is the Rx point ID and determine the reception point corresponding to the Rx point ID as the destination for the UL signal. When deciding to send an UL signal to a center TRP, the UE may also assume that the CIF value is the center TRP ID and determine the center TRP corresponding to the ID as the destination for the UL signal. The value of Z may be predetermined or set by a higher-layer parameter. For example, the value of Z may be 6.

[0057] Figure 4 This is a diagram showing a third example of a method for determining the destination of a UL signal according to a CIF value. For example, when the number of bits of the set CIF is less than 6 bits, the UE decides to send the UL signal to the center TRP, and when it is not the case, it decides to send the UL signal to the receiving point. Figure 4 In the example shown, the CIF value set in the DL signal is "00001" (5 bits). That is, the number of bits of the set CIF is less than 6 bits, so it is decided to send the UL signal to the center TRP. In addition, the UE decides to send the UL signal to the center TRP with ID "00001".

[0058] According to method 1-2, the UE can appropriately determine the destination of the UL signal using the value of the CIF sent from the center TRP.

[0059] (Methods 1-3)

[0060] In methods 1-3, if "cif-Presence" is set to "true" in the transmitted higher-level signaling and the distributed TRP mode is set in the higher-layer parameters, the UE determines the UL signal transmission destination as the reception point. Alternatively, in methods 1-3, the UE may determine the UL signal transmission destination (one of multiple reception points) based on the CIF value. Furthermore, in methods 1-3, the higher-layer parameters may be replaced with MAC CE or DCI.

[0061] (Method 1-3-1)

[0062] When "cif-Presence" is set to "true" in the transmitted higher-level signaling and the distributed TRP mode is set in the higher-level parameters, the UE can also assume that the Rx point ID is set by the higher-level parameters. In addition, the UE can also determine the UL signal transmission destination as the reception point corresponding to the Rx point ID.

[0063] (Method 1-3-2)

[0064] If "cif-Presence" is set to "true" in the transmitted higher-level signaling and the distributed TRP mode is set in the higher-layer parameters, the UE may replace the CIF included in the DCI with the Rx point ID. Furthermore, the UE may determine the UL signal transmission destination as the reception point corresponding to the Rx point ID.

[0065] (Method 1-3-3)

[0066] When DCI format 0_0 is specified, the UE may apply the above (method 1-3-1) assuming that CIF does not exist, or may apply the above (method 1-3-2) assuming that CIF exists when DCI format 0_1 ​​is specified.

[0067] According to method 1-3, the overhead of DCI and the like can be reduced by using the presence or absence of the distributed TRP mode setting.

[0068] <Second embodiment>

[0069] The UE receives a first DL signal indicating the presence of a CIF from the center TRP and determines the destination of the UL signal from the center TRP and the reception point based on the presence of the CIF. In the second embodiment, the CC applied to the center TRP and the CC applied to the reception point are different.

[0070] In the second embodiment, when “false” is set for “cif-Presence” in the higher-level signaling transmitted from the center TRP, the UE may also apply the same processing as method 1-1 of the above-mentioned first embodiment.

[0071] In addition, in the second embodiment, when "true" is set for "cif-Presence" in the higher-level signaling sent from the center TRP, the UE can also apply the same processing as method 1-2 of the above-mentioned first embodiment.

[0072] (Method 2-1)

[0073] In Method 2-1, "cif-Presence" is set to "true" in the higher-level signaling sent from the central TRP. As in the first embodiment, setting "cif-Presence" to "true" in the higher-level signaling sent from the central TRP can also indicate the presence of the CIF. "CIF presence" can also be replaced with "a value of X bits (X is other than 0) set as the CIF." The value of X can be predetermined or set by DCI or higher-layer parameters. For example, the value of X is 5.

[0074] Furthermore, the UE may also assume that the Cell ID configured in the cross-carrier scheduling configuration (CrossCarrierSchedulingConfig) in higher-level signaling (eg, RRC) corresponds to the CIF.

[0075] In method 2-1, the UE receives a second signal (DCI or higher-layer parameter) indicating the value of the CIF, and determines the destination of the UL signal based on the value of the CIF when the CC applied to the center TRP and the CC applied to the receiving point are not common and the presence of the CIF is indicated by the first DL signal (e.g., upper signaling).

[0076] When a CIF with X bits is set (X is other than 0), the UE may assume that the uppermost bit of the CIF represents either the center TRP or the reception point. Furthermore, the UE may determine the UL signal transmission destination as either the center TRP or the reception point based on the uppermost bit of the CIF.

[0077] Furthermore, the UE may also assume that the lower X-1 bits of the CIF represent the ID of the center TRP or the Rx point ID (Rxpoint ID). For example, if the upper X-1 bit of the CIF represents the center TRP, the UE may determine to which of multiple center TRPs the UL signal is to be sent based on the lower X-1 bit of the CIF. If the upper X-1 bit of the CIF represents the reception point, the UE may determine to which of multiple reception points the DL signal is to be sent based on the lower X-1 bit of the CIF.

[0078] Figure 5 This is a diagram showing a fourth example of a method for determining a transmission destination of a UL signal according to a CIF value. Figure 6 FIG. 5 is a diagram showing a fifth example of a method for determining a transmission destination of a UL signal according to a CIF value. Figure 5 as well as Figure 6 In the example shown, a 5-bit value is set as the CIF value. The upper 1 bit of the 5-bit value represents either the center TRP or the reception point. Figure 5 as well as Figure 6 In the example shown, when the upper bit is 0, the UE determines the destination of the UL signal to be the center TRP, and when the upper bit is 1, the UE determines the destination of the UL signal to be the reception point.

[0079] exist Figure 5 In the CIF, the value is "10000". The upper 1 bit is 1, so the UE determines the destination of the UL signal to be the receiving point. In addition, the UE determines to which receiving point among multiple receiving points the DL signal is to be sent based on the lower 4 bits. Figure 5 In the example shown, the lower 4 bits are "0000", so the UE decides to transmit the UL signal to the reception point with the Rx point ID being "0000".

[0080] exist Figure 6 In the CIF, the value is "00000". The upper 1 bit is 0, so the UE determines the destination of the UL signal to be the center TRP. In addition, the UE determines to which center TRP among multiple center TRPs the DL signal is to be sent based on the lower 4 bits. Figure 6 In the example shown, the lower 4 bits are "0000", so the UE decides to send the UL signal to the central TRP with ID "0000".

[0081] According to method 2-1, bits other than the upper 1 bit can be used for the Rx point ID and the ID of the center TRP, thereby expanding the usage area of ​​the Rx point ID and the ID of the center TRP.

[0082] (Method 2-2)

[0083] In method 2-2, when “cif-Presence” is set to “true” in the transmitted higher-level signaling, the UE determines the DL scheduling destination and the UL scheduling destination based on the CIF value.

[0084] For example, when an X-bit CIF is set, the upper Y bits of the CIF value may be the scheduling destination (transmission source) of the DL (e.g., PDSCH or PDCCH) (e.g., the ID of the center TRP), and the lower XY bits of the CIF value may be the scheduling destination (e.g., Rx point ID) of the UL (e.g., PUSCH or PUCCH). Alternatively, when an X-bit CIF is set, the upper Y bits of the CIF value may be the scheduling destination of the UL, and the lower XY bits of the CIF value may be the scheduling destination of the DL. The value of Y may be predetermined or set by a higher-layer parameter. The value of Y may be 3, for example.

[0085] (Method 2-3)

[0086] Depending on the UL signal's transmission destination (center TRP or reception point), at least one of the following (hereinafter referred to as various parameters) may also differ: transmit power, path loss reference RS (Pathloss reference RS) reference destination index, transmit power offset P0, bandwidth part ID (BWP-ID), time domain resource assignment, frequency domain resource assignment, number of multiple input multiple output (MIMO) layers, and demodulation reference signal (DMRS) type. The UE may also assume that the various parameters differ depending on the UL signal's transmission destination.

[0087] For example, the UE may also assume that various parameters corresponding to the center TRP and various parameters corresponding to the receiving point are each set in the high-level parameters.

[0088] (Method 2-3-1)

[0089] In method 2-3-1, the UE may also assume that the field indicating the UL signal's transmission destination in the DCI (e.g., DCI format 0_0 or DCI format 0_1) is designated as X bits. Furthermore, the UE may determine the UL signal's transmission destination based on the value of this field. X is, for example, 1. For example, when the value of this field is 0, or when this field is not designated, the UE may determine the UL signal's transmission destination to be the reception point. Furthermore, when the value of this field is 1, the UE may determine the UL signal's transmission destination to be the center TRP.

[0090] Figure 7 This is a diagram showing an example in which a field indicating the destination of the UL signal is added to the DCI format 0_1. Figure 7 In the example shown, a "New bit field" (1 bit) is added as a field indicating the UL signal's destination. For example, when the "New bit field" is 0 (when the reception point is designated as the UL signal's destination), various parameters corresponding to the reception point can also be set in higher-layer parameters. Furthermore, when the "New bit field" is 1 (when the center TRP is designated as the UL signal's destination), various parameters corresponding to the center TRP can also be set in higher-layer parameters.

[0091] According to this method, a new field can be added to DCI, thereby avoiding restrictions on the values ​​of various parameters.

[0092] (Method 2-3-2)

[0093] In method 2-3-2, the UE may also assume that the UL signal's destination (reception point or central TRP) is specified in the Radio Network Temporary Identifier (RNTI). Furthermore, the UE may determine the UL signal's destination based on the RNTI. This RNTI may also be the RNTI used to scramble the cyclic redundancy check (CRC) of the DCI used for scheduling the UL signal.

[0094] For example, if the configured RNTI is an odd number, the UE may also assume that the various parameters specified in the DCI are parameters corresponding to the reception point. If the configured RNTI is an even number, the UE may also assume that the various parameters specified in the DCI are parameters corresponding to the center TRP. Here, the relationship between odd and even numbers may also be reversed.

[0095] In addition, in method 2-3-2, the RNTI can also be replaced with a control channel element (CCE) index of the physical resource of the PDCCH, or an activated BWP (activated BWP ID). The activated BWP can also be switched by a BWP switch (e.g., at least one of DCI, MAC CE, and timer).

[0096] In method 2-3-2, the UE can determine the transmission destination of the UL signal without adding a new field to the DCI (without increasing the size of the DCI).

[0097] In Method 2-3 (Method 2-3-1 and Method 2-3-2), the CC applied to the center TRP and the CC applied to the reception point may be common. Furthermore, according to Method 1-2 or the method described in Method 2-1, the center TRP ID or the Rx point ID may be set in the second signal (DCI or higher layer parameter) indicating the CIF value.

[0098] (Methods 2-4)

[0099] If "cif-Presence" is set to "false" in higher-level signaling sent from the central TRP, the UE may assume that the CIF is not present (0 bits). In this case, the UE may assume that cross-carrier scheduling is performed on the CC of the reception point using the DCI sent from the central TRP. In this case, the UE may determine the reception point as the destination for the UL signal. Furthermore, the UE may assume that the CC index of the reception point is set using higher-layer parameters, MAC CE, or DCI.

[0100] Figure 8 : is a diagram showing an example of cross-carrier scheduling using DCI. Figure 8 In the example shown, the DCI sent from the center TRP specifies the scheduling of the PDSCH / PUSCH of the CC (CC#2) of the reception point (Rx point). In this case, the UE can also decide to send the UL signal to the reception point.

[0101] <Other>

[0102] In the present disclosure, "the UE transmits the UL signal to the receiving point" may also be replaced with "when the subcarrier spacing (SCS) is set in the DL signal and the UL signal, respectively, the transmission source of the DL signal and the transmission destination of the UL signal are different". In addition, SCS may also be replaced with μ (an index or parameter set corresponding to the SCS). For example, μ may also be set for the DL signal and the UL signal separately. For example, the UE may also determine the transmission destination of the CC whose SCS is smaller than a specific value as the center TRP. For example, the UE may also determine the transmission destination of the CC whose SCS is greater than a specific value as the receiving point.

[0103] In this disclosure, the phrase "the UE transmits an UL signal to a reception point" can be replaced with "when CCS is configured for each of the DL signal and the UL signal, the transmission source of the DL signal and the transmission destination of the UL signal are different." In this case, the UE can also assume that a cross-carrier scheduling configuration (CrossCarrierSchedulingConfig) is configured for each of the DL signal and the UL signal.

[0104] In the present disclosure, "the UE transmits the UL signal to the receiving point" can also be replaced with "when parameters for correcting the path loss are set in the power control procedure of the UL signal (for example, PUSCH, PUCCH, or SRS), the transmission source of the DL signal and the transmission destination of the UL signal are different." In this case, the UE can also assume that the path loss reference RS is sent to the center TRP.

[0105] In the present disclosure, "the UE sends the UL signal to the receiving point" can also be replaced by "when the number of resource blocks (RB) of PUSCH is set to X [RBs] or more, the UL signal is sent to the receiving point." "The UE sends the UL signal to the center TRP" can also be replaced by "when the number of RBs of PUSCH is not set to X [RBs] or more, the UL signal is sent to the center TRP." The threshold value of the number of RBs (X [RBs]) can also be notified to the UE through RRC, MAC CE, or DCI.

[0106] In the present disclosure, “the UE sends the UL signal to the receiving point” may also be replaced by “when the waveform of the UL signal is cyclic prefix OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM)), the UE sends the UL signal to the receiving point”. “The UE sends the UL signal to the center TRP” may also be replaced by “when the waveform of the UL signal is DFT spread OFDM (Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM)), the UE sends the UL signal to the center TRP”.

[0107] In the present disclosure, "determining the UL signal's transmission destination to be a reception point" can be replaced with "sending the UL signal to the reception point." Furthermore, "determining the UL signal's transmission destination to be a center TRP" can be replaced with "sending the UL signal to the center TRP." Furthermore, the fact that the DL signal's transmission source and the UL signal's transmission destination are different can also mean that the reception point transmits the DL signal to the UE, and the UE transmits the UL signal to the center TRP.

[0108] In the present disclosure, the Code Division Multiplexing (CDM) group of DMRS may also be different depending on whether the transmission destination of the UL signal is the central TRP or the receiving point. For example, when DMRS type 1 is used, CDM groups #0 and #1 are used. In addition, when DMRS type 2 is used, CDM groups #0, #1, and #2 are used. For example, when the UL signal is sent to the central TRP, the UE may also be assumed to be set with a port index of the DMRS corresponding to CDM group #0. The received power differs depending on the transmission destination of the UL (central TRP or receiving point). Therefore, if the same resource element (RE) is used, there is interference, but since the CDM groups are different and the REs do not overlap, the interference can be suppressed.

[0109] The receiving point (Rx point) in the present disclosure can also be replaced by RP, receiving point (Reception point), distributed TRP (Distributed TRP), additional TRP (Additional TRP), restricted TRP (Restrictive TRP), receiving cell (Rx cell), receiving component carrier (Rx CC), or receiving BWP (receiving bandwidth part).

[0110] The central TRP in the present disclosure may also be replaced by TRP, transmission and reception point, main TRP, Tx and Rx cell, Tx and Rx CC, or Tx and Rx BWP.

[0111] The TRP in the present disclosure may also be replaced by an RS group, an antenna port group, a Control Resource Set (CORESET) group, a cell, or a CC.

[0112] The term "distributed TRP mode" in this disclosure may be replaced by "separated location mode of Tx / Rx point," "distributed Tx / Rx point mode," "separated TRP mode," "TRP type 1," or "TRP type A." The "1" in "TRP type 1" may be replaced by other numerical values. The "A" in "TRP type A" may be replaced by other characters.

[0113] The CP-OFDM in the present disclosure may also be replaced by a transform precoding disabled state, and the DFT-s-OFDM in the present disclosure may also be replaced by a transform precoding enabled state.

[0114] Cross-carrier scheduling (CCS) in the present disclosure can also be replaced by multi-carrier scheduling, or DCI on a CC schedules PDSCH / PUSCH on different CCs. DCI on a CC schedules PDSCH / PUSCH on different CCs can be expressed as follows: Figure 9 Like that. Figure 9 It is a diagram showing an application example of cross-carrier scheduling. Figure 9 The arrows in represent scheduling.

[0115] Alternatively, the UE may determine that UL signals must be transmitted to the center TRP regardless of whether the CC used for the center TRP and the CC used for the reception point are common, or regardless of whether a CIF exists. Alternatively, the UE may determine that UL signals must be transmitted to the reception point regardless of whether the CC used for the center TRP and the CC used for the reception point are common, or regardless of whether a CIF exists.

[0116] According to the above-described embodiments, the UE can perform appropriate communications in an environment where reception points other than the center TRP exist. For example, the scheduling method can be appropriately determined when the center TRP and the reception point use different or the same component carrier (CC), and the destination of signals transmitted by the UE can be appropriately determined.

[0117] (Wireless Communication System)

[0118] The following describes a configuration of a wireless communication system according to an embodiment of the present disclosure. In this wireless communication system, communication is performed using one or a combination of the wireless communication methods according to the above-described embodiments of the present disclosure.

[0119] Figure 10 This figure shows an example of a schematic configuration of a wireless communication system according to one embodiment. The wireless communication system 1 may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP) or the fifth generation mobile communication system New Radio (5G NR).

[0120] In addition, the wireless communication system 1 can also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0121] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0122] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0123] The wireless communication system 1 may also include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) that are located within the macrocell C1 and form small cells C2 that are narrower than the macrocell C1. User terminals 20 may also be located within at least one of the cells. The arrangement and number of cells and user terminals 20 are not limited to those shown in the figure. Hereinafter, when not distinguishing between base stations 11 and 12, they are collectively referred to as base stations 10.

[0124] The user terminal 20 may also be connected to at least one of the multiple base stations 10. The user terminal 20 may also utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0125] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (below 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above 24 GHz (above-24 GHz)). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to this. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0126] Furthermore, the user terminal 20 may communicate in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0127] Multiple base stations 10 can also be connected by wired (for example, optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (for example, NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 equivalent to the upper station can also be called an integrated access backhaul (IAB) donor, and the base station 12 equivalent to the relay station can also be called an IAB node.

[0128] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0129] The user terminal 20 may also be a terminal corresponding to at least one of the communication methods such as LTE, LTE-A, and 5G.

[0130] In the wireless communication system 1, a radio access scheme based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), or single carrier frequency division multiple access (SC-FDMA) may be used.

[0131] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be applied to the UL and DL radio access schemes.

[0132] In the wireless communication system 1, as downlink channels, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. can also be used.

[0133] In addition, in the wireless communication system 1, as uplink channels, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. can also be used.

[0134] The PDSCH is used to transmit user data, higher-layer control information, and system information blocks (SIBs). The PUSCH can also be used to transmit user data, higher-layer control information, and the Master Information Block (MIB). The PBCH can also be used to transmit the Master Information Block (MIB).

[0135] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information for at least one of the PDSCH and the PUSCH.

[0136] In addition, the DCI that schedules the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be replaced by DL data, and the PUSCH may also be replaced by UL data.

[0137] In PDCCH detection, a control resource set (CORESET) and a search space can also be used. A CORESET corresponds to the resources for searching for DCI. A search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space settings.

[0138] A search space may also correspond to PDCCH candidates that correspond to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. Furthermore, the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in this disclosure may be used interchangeably.

[0139] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also known as hybrid automatic repeat request acknowledgment (HARQ-ACK)), ACK / NACK, and scheduling request (SR)) can also be transmitted via the PUCCH. A random access preamble used to establish a connection with a cell can also be transmitted via the PRACH.

[0140] In the present disclosure, downlink, uplink, etc. may be expressed without the word "link." Furthermore, various channels may be expressed without the word "physical" at the beginning.

[0141] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. In the wireless communication system 1, as DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may also be transmitted.

[0142] For example, a synchronization signal may be at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SSs (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as an SS / PBCH block, an SS block (SSB), or the like. Furthermore, SSs and SSBs may also be referred to as reference signals.

[0143] In addition, in the wireless communication system 1, as an uplink reference signal (UL-RS), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0144] (Base Station)

[0145] Figure 11This figure shows an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface (transmission line interface) 140. Furthermore, more than one of each of the control unit 110, the transmitting / receiving unit 120, the transmitting / receiving antenna 130, and the transmission path interface 140 may be provided.

[0146] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and the base station 10 can also be assumed to have other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0147] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on the common knowledge in the technical field to which this disclosure relates.

[0148] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. It may also control transmission and reception, measurement, etc., using the transmission and reception unit 120, the transmission and reception antennas 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting up, releasing, etc.) of communication channels, manage the status of the base station 10, manage radio resources, etc.

[0149] The transceiver unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transceiver circuit, and the like, which are described based on the common knowledge in the technical field involved in this disclosure.

[0150] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0151] The transmitting and receiving antenna 130 can be formed of an antenna described based on the common knowledge in the technical field to which this disclosure relates, such as an array antenna.

[0152] The transmitting and receiving unit 120 may also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the aforementioned uplink channel, uplink reference signal, etc.

[0153] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0154] The sending and receiving unit 120 (sending processing unit 1211) can also perform processing on the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (for example, RLC retransmission control), the Medium Access Control (MAC) layer (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 110 to generate a bit string to be sent.

[0155] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0156] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0157] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 130 .

[0158] The transmitting and receiving unit 120 (receiving processing unit 1212) can also apply receiving processing such as analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0159] The transmitting and receiving unit 120 (measuring unit 123) may also perform measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (SINR), signal to noise ratio (SNR)), signal strength (e.g., received signal strength indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0160] The transmission path interface 140 can also send and receive signals (return signaling) between the devices included in the core network 30, other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0161] In addition, the transmitting unit and the receiving unit of the base station 10 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 120 , the transmitting and receiving antenna 130 , and the transmission path interface 140 .

[0162] In addition, the transmitting and receiving unit 120 may also transmit a first DL signal indicating the presence or absence of the CIF and a second DL signal indicating the value of the CIF to the UE. In addition, the term "notify" in this disclosure may be replaced with "instruct," "set," or "transmit."

[0163] (User Terminal)

[0164] Figure 12 This figure shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Furthermore, more than one of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided.

[0165] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and the user terminal 20 may also be assumed to have other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0166] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on the common knowledge in the technical field to which this disclosure relates.

[0167] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission, reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals and forward them to the transmission and reception unit 220.

[0168] The transceiver unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, and the like, which are described based on the common knowledge in the technical field involved in this disclosure.

[0169] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0170] The transmitting and receiving antenna 230 can be formed of an antenna described based on the common knowledge in the technical field to which this disclosure relates, such as an array antenna.

[0171] The transmitting and receiving unit 220 may also receive the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the aforementioned uplink channel, uplink reference signal, etc.

[0172] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0173] The sending and receiving unit 220 (sending processing unit 2211) can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0174] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0175] In addition, whether or not to apply DFT processing may also be based on the transform precoding setting. For a certain channel (e.g., PUSCH), if transform precoding is activated (enabled), the transmitting / receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the aforementioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting / receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the aforementioned transmission processing without performing DFT processing.

[0176] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0177] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 230 .

[0178] The transmitting and receiving unit 220 (receiving processing unit 2212) can also apply receiving processing such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0179] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to received signals. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signals. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0180] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be constituted by at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0181] In addition, the transmitting and receiving unit 220 receives a first DL signal indicating the presence or absence of a CIF and a second DL signal indicating the value of the CIF from the transmitting and receiving point (center TRP). In addition, the first DL signal may also be, for example, higher-level signaling (e.g., RRC signaling). The second DL signal may also be, for example, DCI or higher-level parameters.

[0182] The control unit 210 may also determine the destination of the UL signal from the transmitting and receiving points and the receiving points based on the presence or absence of CIF. For example, when the first DL signal indicates that the CIF does not exist and the distributed TRP mode is set in the higher-layer parameters, the control unit 210 may also determine the destination of the UL signal to be the receiving point. For example, when the CC applied to the transmitting and receiving points and the CC applied to the receiving points are common and the presence of CIF is indicated by the first DL signal, the control unit 210 may also determine the destination of the UL signal based on the value of CIF. For example, when the first DL signal indicates that the CIF exists and the distributed TRP mode is set in the higher-layer parameters, the control unit 210 may also determine the destination of the UL signal to be the receiving point. For example, when the CC applied to the transmitting and receiving points and the CC applied to the receiving points are different and the presence of CIF is indicated by the first DL signal, the control unit 210 may also determine the destination of the UL signal based on the value of CIF.

[0183] (Hardware Structure)

[0184] In addition, the block diagrams used in the description of the above embodiments show blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, by wired, wireless, etc.) and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0185] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, resolving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any of them are as described above, and the implementation method is not particularly limited.

[0186] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 13 This figure shows an example of the hardware configuration of a base station and a user terminal according to one embodiment. The base station 10 and user terminal 20 described above can also 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, and the like.

[0187] In addition, in this disclosure, the terms such as device, circuit, equipment, section, and unit are interchangeable. The hardware structure of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or may not include some of the devices.

[0188] For example, although only one processor 1001 is shown, multiple processors may be provided. Furthermore, processing may be performed by a single processor, or by two or more processors simultaneously, sequentially, or using other methods. Furthermore, processor 1001 may be implemented using more than one chip.

[0189] Regarding the various functions in the base station 10 and the user terminal 20, for example, they are achieved by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0190] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a computing device, registers, etc. For example, at least a portion of the aforementioned control unit 110 (210) and the transmitting and receiving unit 120 (220) may also be implemented by the processor 1001.

[0191] In addition, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and performs various processes based on the program. As a program, a program that causes a computer to perform at least a portion of the operations described in the above embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks can also be implemented similarly.

[0192] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other appropriate storage medium. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program code), software modules, etc. for implementing the wireless communication method according to one embodiment of the present disclosure.

[0193] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc Read-Only Memory (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, or a key drive), a magnetic stripe, a database, a server, or other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0194] The communication device 1004 is hardware (a transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network. For example, it is also called a network device, a network controller, a network card, a communication module, etc. In order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220) and the transmitting and receiving antenna 130 (230) may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be installed with the transmitting unit 120a (220a) and the receiving unit 120b (220b) separated physically or logically.

[0195] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to the outside (e.g., a display, speaker, light emitting diode (LED) lamp, etc.). Alternatively, the input device 1005 and the output device 1006 may be integrated (e.g., a touch panel).

[0196] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0197] Furthermore, the base station 10 and user terminal 20 may also 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 may use this hardware to implement part or all of each functional block. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0198] (Variation)

[0199] In addition, the terms described in this disclosure and the terms required for understanding this disclosure may also be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be replaced with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, or may be referred to as a pilot, pilot signal, etc. depending on the applied standard. In addition, a component carrier (CC) may also be referred to as a cell, frequency carrier, carrier frequency, etc.

[0200] A radio frame can also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) that constitute a radio frame can also be called a subframe. Furthermore, a subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) that is independent of the parameter set (numerology).

[0201] Here, a parameter set may also refer to communication parameters applied to at least one of the transmission and reception of a signal or channel. For example, a parameter set may also represent at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0202] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0203] A time slot may also contain multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. Furthermore, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as PDSCH (PUSCH) mapping type B.

[0204] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units used for signal transmission. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective equivalents. Furthermore, the terms frame, subframe, time slot, mini-time slot, and symbol may be used interchangeably in this disclosure.

[0205] For example, a subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, and a time slot or a mini-time slot can also be called a TTI. In other words, at least one of a subframe and a TTI can be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. In addition, the unit representing a TTI can also be called a time slot, a mini-time slot, etc. instead of a subframe.

[0206] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communications. For example, in the LTE system, a base station schedules each user terminal by allocating radio resources (such as the frequency bandwidth and transmit power available to each user terminal) in TTI units. The definition of TTI is not limited to this.

[0207] The TTI may also be a unit of time for transmitting channel-coded data packets (transport blocks), code blocks, code words, etc., and may also be a unit of processing for scheduling, link adaptation, etc. Furthermore, when a TTI is given, the time interval (e.g., the number of symbols) to which the transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.

[0208] Furthermore, when a time slot or a mini-time slot is referred to as a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-time slots) may also be the minimum time unit for scheduling. Furthermore, the number of time slots (mini-time slots) constituting the minimum time unit for scheduling may also be controlled.

[0209] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini-slot, a subslot, a time slot, etc.

[0210] In addition, long TTI (for example, normal TTI, subframe, etc.) can also be replaced by TTI with a time length exceeding 1ms, and short TTI (for example, shortened TTI, etc.) can also be replaced by TTI with a TTI length smaller than long TTI and greater than 1ms.

[0211] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it may also include one or more consecutive subcarriers (subcarriers). The number of subcarriers included in an RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0212] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks.

[0213] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0214] 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.

[0215] A Bandwidth Part (BWP) (also referred to as a fractional bandwidth) can also represent a subset of contiguous common resource blocks (RBs) used for a particular parameter set within a particular carrier. Common RBs can also be identified by their index relative to the common reference point of the carrier. PRBs can also be defined within a BWP and numbered within that BWP.

[0216] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured within one carrier.

[0217] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive specific signals / channels outside of the activated BWP. In addition, the terms "cell," "carrier," and the like in this disclosure may be replaced with "BWP."

[0218] The above-mentioned structures of radio frames, subframes, slots, mini-slots, and symbols are merely examples. For example, various modifications may be made to the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots within a slot, the number of symbols and RBs within a slot or mini-slot, the number of subcarriers within an RB, the number of symbols within a TTI, the symbol length, and the cyclic prefix (CP) length.

[0219] Furthermore, the information and parameters described in this disclosure may be expressed as absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may be indicated by specific indexes.

[0220] In this disclosure, the names used for parameters, etc., are not intended to be limiting in any respect. Furthermore, the mathematical formulas for these parameters, etc., may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can 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 respect.

[0221] Information, signals, and the like described in this disclosure may also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like that may be referred to throughout the foregoing description may also be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0222] Furthermore, information, signals, etc. can be output from a higher (upper) layer to a lower (lower) layer, or from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0223] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or appended. Output information, signals, etc. may also be deleted. Input information, signals, etc. may also be sent to other devices.

[0224] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI))), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC)) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0225] In addition, physical layer signaling may also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as RRC message, for example, RRC Connection Setup message, RRC Connection Reconfiguration message, etc. In addition, MAC signaling may also be notified using MAC Control Element (CE), for example.

[0226] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0227] The determination can be made by a value represented by a bit (0 or 1), a true or false value (Boolean value) represented by true (true) or false (false), or by comparing numerical values ​​(for example, comparing with a specific value).

[0228] Whether software is called software, firmware, middleware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software module, application, software application, software package, routine, sub-routine, object, executable file, execution thread, procedure, function, etc.

[0229] Furthermore, software, instructions, information, and the like may also be transmitted and received via a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and a wireless technology (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0230] The terms "system" and "network" used in this disclosure can be used interchangeably. "Network" may also refer to devices included in the network (eg, base stations).

[0231] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)" "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" can be used interchangeably.

[0232] In this disclosure, terms such as "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "transmission point (TP)", "reception point (RP))," "transmission / reception point (TRP)", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" are used interchangeably. In some cases, a base station may be referred to as a macro cell, a small cell, a femto cell, or a pico cell.

[0233] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entire coverage area of ​​at least one of the base station and base station subsystem that provides communication services within the coverage area.

[0234] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (UE)”, and “terminal” can be used interchangeably.

[0235] The mobile station may also be referred to 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, hand set, user agent, mobile client, client, or several other appropriate terms.

[0236] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Furthermore, at least one of the base station and the mobile station may also be a device mounted on a mobile object, a mobile object itself, etc. The mobile object may be a vehicle (e.g., a vehicle, an aircraft, etc.), a mobile object that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0237] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by communication between multiple user terminals (for example, which may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be configured such that the user terminal 20 has the functions of the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0238] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0239] In the present disclosure, operations are assumed to be performed by a base station, and sometimes, depending on the circumstances, by its upper node. Obviously, in a network including one or more network nodes including a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (for example, a Mobility Management Entity (MME)), a Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0240] The various methods / implementations described in this disclosure may be used individually or in combination, and may be switched between them during execution. Furthermore, the processing procedures, sequences, flow charts, and the like of the various methods / implementations described in this disclosure may be reversed as long as they do not conflict. For example, the elements of various steps described in this disclosure are presented in an illustrative order, but are not limited to the specific order presented.

[0241] The various modes and embodiments described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future Generation Radio Access (FX), Global System for Mobile Communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.18 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (WiMAX (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (WiMAX (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 8 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems based on these. In addition, multiple systems can also be combined for application (for example, LTE or LTE-A combined with 5G, etc.).

[0242] The phrase “based on” used in this disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on.”

[0243] Any reference to an element using the designations "first," "second," etc., as used in this disclosure, does not necessarily limit the quantity or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to a first and a second element does not necessarily imply that only two elements may be used, or that the first element must in some way take precedence over the second element.

[0244] The term "determining" as used in this disclosure may encompass a variety of operations. For example, "determining" may also be considered as "judging," calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), ascertaining, etc.

[0245] In addition, "judgment (decision)" can also be regarded as a situation of "judgment (decision)" on receiving (for example, receiving information), transmitting (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc.

[0246] In addition, "judgment (decision)" can also be regarded as a situation in which "judgment (decision)" is performed on resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment (decision)" can also be regarded as a situation in which "judgment (decision)" is performed on some operations.

[0247] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and so on.

[0248] As used in this disclosure, 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 the two elements being "connected" or "coupled." The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be replaced by "access."

[0249] In the present disclosure, when two elements are connected, it can be considered that they are "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0250] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other." Alternatively, the term may also mean "A and B are each different from C." Terms such as "separate" and "bound" may also be interpreted as meaning "different."

[0251] In this disclosure, when the terms "include," "including," and variations thereof are used, these terms, like the term "comprising," have an inclusive meaning. Furthermore, the term "or" used in this disclosure does not mean an exclusive OR.

[0252] In the present disclosure, when an article is added by translation, such as a, an, and the in English, the present disclosure may also include a case where the noun following the article is in a plural form.

[0253] While the inventions disclosed herein have been described in detail above, it will be apparent to those skilled in the art that the inventions disclosed herein are not limited to the embodiments described herein. The inventions disclosed herein can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the claims. Therefore, the descriptions in this disclosure are for illustrative purposes only and are not intended to limit the inventions disclosed herein in any way.

Claims

1. A terminal, characterized in that: have: A receiving unit receives a first downlink signal (DL signal) indicating the presence or absence of a carrier indicator field (CIF) from a transmitting and receiving point; as well as A control unit determines a transmission destination of an uplink signal (UL) from among the transmission and reception points based on the presence or absence of the CIF. The receiving unit receives a second DL signal indicating a value of the CIF, When a component carrier (CC) applied to the transmission and reception point and a CC applied to the reception point are common and the presence of the CIF is indicated by the first DL signal, the control unit determines a transmission destination of the UL signal based on a value of the CIF.

2. The terminal according to claim 1, wherein When the first DL signal indicates that the CIF does not exist and a distributed transmission / reception point (TRP) mode is set in a higher layer parameter, the control unit determines the reception point as the transmission destination of the UL signal.

3. The terminal according to claim 1, wherein When the presence of the CIF is indicated by the first DL signal and a distributed transmission / reception point (TRP) mode is set in a higher layer parameter, the control unit determines the reception point as the transmission destination of the UL signal. The terminal according to claim 1 , wherein: The receiving unit receives a second DL signal indicating a value of the CIF, When a component carrier (CC) applied to the transmission / reception point is different from a CC applied to the reception point and the presence of the CIF is indicated by the first DL signal, the control unit determines a transmission destination of the UL signal based on a value of the CIF.

5. A wireless communication method for a terminal, characterized in that: have: A step of receiving a first downlink signal (DL signal) indicating the presence or absence of a carrier indicator field (CIF) (Carrier Indicator Field (CIF)) from a transmission / reception point; a step of determining a transmission destination of an uplink (UL) signal from among the transmission / reception point and the reception point based on the presence or absence of the CIF; as well as the step of receiving a second DL signal representing the value of said CIF, In the step of determining the sending destination of the UL signal from the sending and receiving point and the receiving point, when the component carrier (CC) applied to the sending and receiving point and the CC applied to the receiving point are common and the presence of the CIF is indicated by the first DL signal, the terminal determines the sending destination of the UL signal based on the value of the CIF.

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