User terminal and wireless communication method

Abstract

In order to appropriately implement transmission of uplink control information even in a case where a plurality of TRPs or panels are used, one embodiment of the user terminal of the present disclosure has: a transmission unit that transmits uplink control information corresponding to DL signals respectively transmitted from a plurality of transmission-reception points; and a control unit that determines at least one of a resource allocation order for the uplink control information and a priority of the uplink control information based on a kind of the uplink control information and a corresponding transmission-reception point.

Description

TECHNICAL FIELD

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

[0002] In a Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized for the purpose of further higher-speed data rates, lower delay, and so on (Non-Patent Literature 1). Further, LTE-Advanced (3GPP Rel. 10-14) has been standardized for the purpose of further larger capacity, higher degree of integration, and so on of LTE (3rd Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] A subsequent system of LTE (for example, also referred to as a 5th generation mobile communication system (5G), 5G (plus), New Radio (NR), 3GPP Rel. 15 onwards, and so on) is also being studied.

[0004] In the existing LTE system (for example, LTE Rel. 8-13), a user terminal (User Equipment (UE)) controls reception of a downlink shared channel (for example, a Physical Downlink Shared Channel (PDSCH)) based on downlink control information (also referred to as Downlink Control Information (DCI), a DL assignment, and so on) from a radio base station. Further, the UE transmits uplink control information (Uplink Control Information (UCI)) using at least one of a UL data channel (for example, a Physical Uplink Shared Channel (PUSCH)) and a UL control channel (for example, a Physical Uplink Control Channel (PUCCH)).

[0005] The uplink control information contains an acknowledgement signal (e.g., HARQ-ACK) corresponding to a DL signal (e.g., PDSCH), channel state information (e.g., Channel State Information (CSI)), a scheduling request (e.g., Scheduling Request (SR)), and the like. For example, the UE measures a specific reference signal and transmits channel state information (CSI) to the base station.

[0006] Prior Art Documents

[0007] Non-Patent Literature

[0008] Non-Patent Literature 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

[0009] Problems to be Solved by the Invention

[0010] It is being studied that, in a future wireless communication system (e.g., NR), multiple transmission / reception points (TRPs) (multi-TRP) or multiple panels (multi-panel) respectively perform non-coherent transmission to a UE.

[0011] In the multi-TRP / multi-panel scenario, it is assumed that multiple CSI types are reported for dynamic scheduling. Depending on the CSI type, the type, size, and the like of the reported information can also be different.

[0012] However, in the case where uplink control information (HARQ-ACK, CSI, and the like) corresponding to a DL signal from multiple TRPs is transmitted, how to control the transmission operation (e.g., resource allocation or determination of transmission priority, and the like) of each uplink control information becomes a problem.

[0013] Therefore, one of the objects of the present disclosure is to provide a user terminal and a wireless communication method capable of appropriately implementing transmission of uplink control information even in the case where multiple TRPs or panels are used.

[0014] Means for solving the problem

[0015] The user terminal according to the aspect of the present disclosure is characterized by having a transmission unit that transmits uplink control information corresponding to DL signals respectively transmitted from a plurality of transmission-reception points, and a control unit that determines at least one of a resource allocation order for the uplink control information and a priority of the uplink control information, based on a kind of the uplink control information and a corresponding transmission-reception point.

[0016] Effects of the invention

[0017] According to the aspect of the present disclosure, even when a plurality of TRPs or panels are used, transmission of uplink control information can be appropriately performed. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1A and Figure 1B is a diagram that shows an example of a case where PDSCH is transmitted from a plurality of transmission-reception points.

[0019] Figure 2 is a diagram that shows an example of UCI transmission using PUSCH.

[0020] Figure 3 is a diagram that shows an example of CSI reporting.

[0021] Figure 4 is a diagram that shows an example of the outline structure of a wireless communication system according to an embodiment.

[0022] Figure 5 is a diagram that shows an example of the structure of a base station according to an embodiment.

[0023] Figure 6 is a diagram that shows an example of the structure of a user terminal according to an embodiment.

[0024] Figure 7 is a diagram that shows an example of the hardware structure of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION

[0025] Research is being conducted on non-coherent DL (e.g., PDSCH) transmission from a plurality of transmission reception points (TRPs) respectively in future wireless communication systems (e.g., Rel. 16 or later). Transmission of a DL signal (or DL channel) coordinated to become non-coherent from a plurality of TRPs can also be referred to as NCJT (Non-Coherent Joint Transmission). In addition, in this specification, a transmission reception point (TRP) can also be replaced with a transmission point, a reception point, a panel, a cell, or a DMRS port group.

[0026] It is also envisaged that the scheduling of non-coherent PDSCHs transmitted from a plurality of transmission reception points respectively is controlled using one or more DCIs. As an example, in order to schedule PDSCHs transmitted from a plurality of transmission reception points, a plurality of downlink control channels (or DCIs) is used.

[0027] In Figure 1A , a case is indicated in which a PDSCH (e.g., a PDSCH using NCJT), a reference signal is transmitted to a UE from a plurality of panels, in Figure 1B , a case is indicated in which a PDSCH (e.g., a PDSCH using NCJT), a reference signal is transmitted to a UE from a plurality of transmission reception points (TRPs).

[0028] The UE feeds back (or reports) HARQ-ACK corresponding to a PDSCH transmitted from a TRP, channel state information (CSI) corresponding to a reference signal, as uplink control information, to a network (or a base station, a TRP).

[0029] (CSI)

[0030] The UE can also measure a channel state using a channel state information reference signal (CSI-RS), a synchronization signal / broadcast channel (SS / PBCH) block, a synchronization signal (SS), a demodulation reference signal (DMRS), and the like.

[0031] The CSI-RS resource can also contain at least one of a non-zero power (NZP) CSI-RS resource, a zero power (ZP) CSI-RS resource, and a CSI-IM (interference measurement) resource.

[0032] The resource for measuring the CSI-signal component can also be referred to as a signal measurement resource (SMR). The SMR can also contain, for example, a NZP CSI-RS resource for channel measurement, an SSB, and the like.

[0033] The resource for measuring the CSI-interference component can also be referred to as an interference measurement resource (IMR). The IMR can also contain, for example, at least one of a NZP CSI-RS resource for interference measurement, an SSB, a ZP CSI-RS resource, and a CSI-IM resource.

[0034] The SS / PBCH block is a block containing a synchronization signal (e.g., a primary synchronization signal (PSS), a secondary synchronization signal (SSS)) and a PBCH (and a corresponding DMRS), and can also be referred to as an SS block (SSB), and the like.

[0035] In addition, the CSI can also include at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), a CSI-RS resource indicator (CRI), an SS / PBCH block resource indicator (SS / PBCH block indicator (SSBRI)), a layer indicator (LI), a rank indicator (RI), L1-RSRP (reference signal received power in layer 1 (Layer 1 Reference Signal Received Power)), L1-RSRQ (reference signal received quality), L1-SINR (signal to interference plus noise ratio (Signal to Interference plus Noise Ratio)), L1-SNR (signal to noise ratio (Signal to Noise Ratio)), and the like.

[0036] The CSI can also have multiple parts. CSI part 1 can also include information (for example, RI) of which the number of bits is relatively small. CSI part 2 can also include information (for example, CQI) of which the number of bits is relatively large, and the like, information determined based on CSI part 1.

[0037] For example, CSI part 1 can also be constituted by information of which the priority is higher (higher priority) compared to CSI part 2. For example, CSI part 2 can also be configured to be a structure including information (or information that becomes necessary based on the information included in CSI part 1) that is premised on the information included in CSI part 1. As an example, it can also be configured to a structure in which CSI part 1 includes information (for example, a rank indicator (RI)) indicating the number of ranks (or the number of layers), and CSI part 2 includes information (for example, channel quality information (CQI)) indicating the channel quality. In this case, with respect to CSI part 2, it can also be configured to a structure including CQI that is premised on the rank included in CSI part 1.

[0038] In addition, the information indicating the rank number can also be the RI in the existing LTE system, and the information indicating the channel quality can also be the CQI in the existing LTE system. Of course, the information included in the CSI part 1 and the CSI part 2 is not limited thereto. It can also be configured such that the information related to the rank and the PMI is included in the CSI part 1, and the information related to the CQI is included in the CSI part 2. Alternatively, it can also be configured such that the information related to the rank is included in the CSI part 1, and the information related to the PMI and the CQI is included in the CSI part 2.

[0039] In addition, it can also be specified that the amount of information (or size, number of bits) of the CSI part 1 is smaller than that of the CSI part 2. Alternatively, it can also be configured such that the PUCCH formats applied to the CSI part 1 and the CSI part 2 are different. In addition, the plurality of kinds of CSI can be constituted by the two of the CSI part 1 and the CSI part 2, or can be constituted by three or more CSI parts.

[0040] In addition, the CSI can also be classified into several CSI types. Depending on the CSI type, the kind of information used for reporting, the size, and the like can also be different. For example, it can also be specified that a CSI type (also referred to as type I CSI, single-beam CSI, or the like) set for performing communication using a single beam, and a CSI type (also referred to as type II CSI, multi-beam CSI, or the like) set for performing communication using a plurality of beams. The use of the CSI type is not limited thereto.

[0041] The measurement result (for example, CSI) reported for beam management can also be referred to as beam measurement, beam measurement result, beam measurement report, or the like.

[0042] As a feedback method of the CSI, a periodic CSI (P-CSI) report, an aperiodic CSI (A-CSI) report, a semi-persistent CSI (SP-CSI) report, and the like are being studied.

[0043] The UE can also be notified of the CSI measurement setting information using high layer signaling, physical layer signaling, or a combination of these.

[0044] In the present disclosure, the higher layer signaling can be, for example, any one of RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information, and the like, or a combination of these.

[0045] The MAC signaling can be, for example, a MAC CE (Control Element), a MAC PDU (Protocol Data Unit). The broadcast information can be, for example, a MIB (Master Information Block), a SIB (System Information Block), minimum system information (RMSI: Remaining Minimum System Information), OSI (Other system information), and the like.

[0046] The physical layer signaling can be, for example, downlink control information (DCI: Downlink Control Information).

[0047] The CSI measurement configuration information can be configured, for example, using the RRC information element "CSI-MeasConfig". The CSI measurement configuration information can include CSI resource configuration information (RRC information element "CSI-ResourceConfig"), CSI report configuration information (RRC information element "CSI-ReportConfig"), and the like.

[0048] In this way, when multiple CSI types are supported in communication using multiple TRPs, how to control the transmission of CSI becomes a problem. For example, in a case where the transmission timing of CSIs corresponding to different TRPs, or different CSI types, collide with each other, it is necessary to appropriately control the transmission operation of CSI.

[0049]

[0050] ​In the existing LTE system (for example, LTE Rel. 8-13), in a case where the transmission timing of uplink data (for example, UL-SCH (Uplink-Shared Channel)) and the transmission timing of uplink control information (UCI) overlap, the UE performs transmission of uplink data and UCI using the uplink shared channel (PUSCH) (also referred to as UCI piggyback on PUSCH, or UCI on PUSCH).

[0051] As with the existing LTE system, in NR, UCI on PUSCH is also considered. However, when supporting transmission of UCI using PUSCH in communication using multiple TRPs, how to control the resource allocation of UCI on PUSCH and the like becomes a problem.

[0052] As one embodiment of the present disclosure, the present inventors have researched how to control the transmission operation of UCI in communication using multiple TRPs (or panels), and have conceived of the matter of appropriately implementing UCI transmission in the case of using multiple TRPs.

[0053] Details of the present embodiment will be described below with reference to the drawings. Each embodiment can be used alone or in combination. In addition, the transmission reception point shown below can be replaced with a panel. Furthermore, in the following description, the TRP can also be replaced with each PDSCH, DMRS port group, code word (CW), or transport block (TB) that is different in quasi-co-location (QCL).

[0054] (First Mode)

[0055] In the first mode, the resource allocation operation of UCI is controlled based on at least the type of uplink control information (hereinafter, also referred to as UCI). In the following description, a case where UCI is multiplexed in the uplink shared channel (PUSCH) (UCI on PUSCH) is described, but it can also be applied to a case where UCI is multiplexed other than PUSCH.

[0056] Figure 2is an example of a case where the UE multiplexes and transmits UCI corresponding to DL transmission (e.g., PDSCH, reference signal (DL RS)) transmitted from two TRPs (e.g., TRP #1 and TRP #2) to PUSCH. Note that the number of TRPs used for communication is not limited to this. Also, in this case, the case where UCI is multiplexed to PUSCH transmitted to a specific TRP (e.g., TRP #1) is shown, but is not limited to this. UCI can also be multiplexed to PUSCH transmitted to TRP #2.

[0057] The UE controls the resource allocation operation based on the type of UCI and the TRP in a case where the UE multiplexes and transmits UCI to PUSCH. Here, as UCI, the case of 2 bits or less of HARQ-ACK, more than 2 bits of HARQ-ACK, first CSI, and second CSI is described, but the type of UCI is not limited to this. Also, the specific bit can be, for example, 2 bits. Also, the first CSI can be CSI part 1, and the second CSI can be CSI part 2.

[0058] For example, for PDSCH transmitted from TRP #1, the UE performs transmission of at least one of 2 bits or less of HARQ-ACK (A1) and more than 2 bits of HARQ-ACK (B1). Also, for the reference signal (e.g., at least one of CSI-RS and SSB / PBCH block) transmitted from TRP #1, the UE performs transmission of at least one of CSI part 1 (C1) and CSI part 2 (D1).

[0059] Also, for PDSCH transmitted from TRP #2, the UE performs transmission of at least one of 2 bits or less of HARQ-ACK (A2) and more than 2 bits of HARQ-ACK (B2). Also, for the reference signal (e.g., at least one of CSI-RS and SSB / PBCH block) transmitted from TRP #1, the UE performs transmission of at least one of CSI part 1 (C2) and CSI part 2 (D2).

[0060] The UE can also perform CSI reporting corresponding to each TRP using one UCI. In this case, the resource allocation operation for UCI of PUSCH can be controlled based on the type of UCI and the TRP. As the allocation operation of UCI, the UE can apply any one of the following allocation operations 1-3.

[0061] Further, in the following description, a case where the resource allocation operation of UCI is controlled by distinguishing a resource assignment order and an information assignment order is shown. The resource assignment order can be replaced by an order of resource allocation guarantee of UCI, or an order of resource allocation reservation. The information assignment order can be replaced by an order of mapping of UCI, or an order of actually multiplexing. Further, the resource assignment order (resource allocation process) and the information assignment order (information assignment order) for a certain UCI type can be performed at the same time.

[0062] Further, in the following description, the types of each UCI and data are as follows.

[0063] A1: 2 bits or less of HARQ-ACK corresponding to TRP #1

[0064] A2: 2 bits or less of HARQ-ACK corresponding to TRP #2

[0065] B1: HARQ-ACK of more than 2 bits corresponding to TRP #1

[0066] B2: HARQ-ACK of more than 2 bits corresponding to TRP #2

[0067] C1: CSI part 1 corresponding to TRP #1

[0068] C2: CSI part 1 corresponding to TRP #2

[0069] D1: CSI part 2 corresponding to TRP #1

[0070] D2: CSI part 2 corresponding to TRP #2

[0071] E: Data (for example, UL-SCH)

[0072] <resource allocation operation 1>

[0073] The UE controls the resource allocation in accordance with the following order (or priority).

[0074] A1 > A2 > B1 > B2 > C1 > C2 > D1 > D2 > E

[0075] Further, the UE controls the information assignment in accordance with the following order (or priority).

[0076] B1 > B2 > C1 > C2 > D1 > D2 > E > A1 > A2

[0077] For example, first, the UE reserves allocated resources (e.g., resource elements (REs)) for transmission of 2-bit or less HARQ-ACK (A1) corresponding to a specific TRP (e.g., a TRP with a relatively small index (here, TRP #1)). Next, the UE reserves allocated resources for transmission of 2-bit or less HARQ-ACK (A2) corresponding to another TRP (here, TRP #2). The resources for 2-bit or less HARQ-ACK transmission can be ensured, which can also be referred to as Step 1.

[0078] Next, the UE reserves allocated resources for transmission of HARQ-ACK (B1) corresponding to a specific TRP (here, TRP #1) that is greater than 2 bits. In addition, the UE can map the HARQ-ACK (B1) to the resources after the allocation of the resources or simultaneously with the allocation of the resources. Next, the UE reserves allocated resources for transmission of HARQ-ACK (B2) corresponding to another TRP (here, TRP #2) that is greater than 2 bits. In addition, the UE can map the HARQ-ACK (B2) to the resources after the allocation of the resources or simultaneously with the allocation of the resources.

[0079] In this way, in a case where the mapping to the resources is performed simultaneously with the allocation of the resources, the allocation of the resources and the mapping to the resources can also be controlled as one operation (the same also applies to the following description). The resource ensuring for the HARQ-ACK that is greater than 2 bits and the mapping to the resources (or, the mapping of the HARQ-ACK that is greater than 2 bits to the resources) can also be referred to as Step 2. In the case of the HARQ-ACK that is greater than 2 bits, the data can also be mapped after being rate-matched. In the case of the HARQ-ACK that is greater than 2 bits, the data can also be mapped after being rate-matched.

[0080] Further, the resource ensuring for the HARQ-ACK that is greater than 2 bits and the mapping to the resources (or, the mapping of the HARQ-ACK that is greater than 2 bits to the resources) can also be performed with respect to resources other than the resources (e.g., REs) reserved in Step 1 for the HARQ-ACK that is 2 bits or less.

[0081] Next, the UE reserves allocated resources for CSI part 1 (C1) corresponding to a specific TRP (here, TRP #1). In addition, the UE can map the CSI part 1 (C1) to the resources after the allocation of the resources or simultaneously with the allocation of the resources. Next, the UE reserves allocated resources for CSI part 1 (C2) corresponding to another TRP (here, TRP #2). In addition, the UE can map the CSI part 1 (C2) to the resources after the allocation of the resources or simultaneously with the allocation of the resources. In the case of the CSI part 1, the data can also be mapped after being rate-matched.

[0082] Further, the resource securing and mapping to the resource of the CSI part 1 (or, the mapping of the CSI part 1 to the resource) can also be performed for the resource other than the resource (e.g., RE) reserved for the 2 bits or less of HARQ-ACK in step 1. Thereby, it is possible to avoid that the CSI part 1 is punctured due to the 2 bits or less of HARQ-ACK mapped in the later step.

[0083] Next, the UE reserves the allocation resource for the CSI part 2 (D1) corresponding to the specific TRP (here, TRP #1). In addition, the UE can also map the CSI part 2 (D1) to the resource after or simultaneously with the allocation of the resource. Next, the allocation resource is reserved for the CSI part 2 (D2) corresponding to the other TRP (here, TRP #2). In addition, the UE can also map the CSI part 2 (D2) to the resource after or simultaneously with the allocation of the resource. As for the CSI part 2, the data can also be mapped after rate matching.

[0084] Further, the resource securing and mapping to the resource of the CSI part 2 (or, the mapping of the CSI part 2 to the resource) can also be performed for the resource including the resource (e.g., RE) reserved for the 2 bits or less of HARQ-ACK in step 1. Thereby, it is possible to allow the CSI part 2 to be punctured due to the 2 bits or less of HARQ-ACK mapped in the later step (e.g., step 5).

[0085] The resource securing and mapping to the resource of the CSI (e.g., the CSI part 1 and the CSI part 2) (or, the mapping of the CSI to the resource) can also be referred to as step 3. Even in the case where there is the CSI corresponding to the plurality of TRPs in the allocation operation of the CSI, the UE prioritizes the specific CSI category. That is, regardless of the TRP index or the like, the UE controls the allocation operation of the CSI based on the CSI category (e.g., prioritizes the CSI part 1 over the CSI part 2).

[0086] Next, the UE reserves the allocation resource for the data (E) corresponding to the specific TRP (here, TRP #1). In addition, the UE can also map the data (E) to the resource after or simultaneously with the allocation of the resource.

[0087] Further, the resource securing and mapping to the resource of the data (or, the mapping of the data to the resource) can also be performed for the resource including the resource (e.g., RE) reserved for the 2 bits or less of HARQ-ACK in step 1. Thereby, it is possible to allow the data to be punctured due to the 2 bits or less of HARQ-ACK mapped in the later step (e.g., step 5).

[0088] The resource securing of data and the mapping to the resource (or, the mapping of data to the resource) can also be referred to as Step 4.

[0089] Next, the UE maps the 2 bits or less of HARQ-ACK (A1) corresponding to a specific TRP (here, TRP #1) to the allocated resource which is reserved (or, secured) in advance. Next, the 2 bits or less of HARQ-ACK (A2) corresponding to the other TRP (here, TRP #2) is mapped to the allocated resource which is reserved (or, secured) in advance.

[0090] In addition, the above-described resource allocation operation can also be appropriately selected according to the type of UCI to be transmitted. For example, in the case where the transmission of 2 bits or less of HARQ-ACK is not performed, only Step 5 can be omitted, or Steps 1 and 5 can be omitted. Further, in the case where the transmission of HARQ-ACK greater than 2 bits is not performed, Step 2 can be omitted.

[0091] When the resource allocation of CSI part 2 and data is allowed in the resource reserved for 2 bits or less of HARQ-ACK, for the CSI part 2 (D1, D2) and data (E), the resource for 2 bits or less of HARQ-ACK (A1, A2) transmission can be used.

[0092] <resource allocation operation 2>

[0093] The UE controls the resource allocation in accordance with the following order (or, priority).

[0094] A1 > B1 > A2 > B2 > C1 > C2 > D1 > D2 > E

[0095] Further, the UE controls the information allocation in accordance with the following order (or, priority).

[0096] B1 > B2 > C1 > C2 > D1 > D2 > E > A1 > A2

[0097] For example, first, the UE reserves the allocated resource (for example, resource element (RE)) for the transmission of 2 bits or less of HARQ-ACK (A1) corresponding to a specific TRP (for example, a TRP with a relatively small index (here, TRP #1)).

[0098] Next, the UE reserves the allocated resource for the transmission of HARQ-ACK greater than 2 bits (B1) corresponding to a specific TRP (here, TRP #1). In addition, the UE can map the HARQ-ACK (B1) to the resource after the allocation of the resource or simultaneously with the allocation of the resource.

[0099] Further, the resource securing and the mapping to the resource of the HARQ-ACK (B1) of more than 2 bits can also be performed for the resources other than the resources (e.g., REs) reserved for the HARQ-ACK (A1) of 2 bits or less.

[0100] Next, the UE reserves the allocated resources for the transmission of the HARQ-ACK (A2) of 2 bits or less corresponding to the other TRP (here, TRP #2). The resource securing of the HARQ-ACK (A2) of 2 bits or less can also be performed for the resources other than the resources reserved for the HARQ-ACK (Al) of 2 bits or less. Further, the resource securing of the HARQ-ACK (A2) of 2 bits or less can also be performed for the resources other than the resources reserved or mapped for the HARQ-ACK (Bl) of more than 2 bits. Thereby, it is possible to avoid the HARQ-ACK being punctured.

[0101] Next, the UE reserves the allocated resources for the transmission of the HARQ-ACK (B2) of more than 2 bits corresponding to the other TRP (here, TRP #2). In addition, the UE can also map the HARQ-ACK (B2) to the resources after the allocation of the resources or simultaneously with the allocation of the resources.

[0102] Further, the resource securing and the mapping to the resource of the HARQ-ACK (B1) of more than 2 bits can also be performed for the resources other than the resources reserved for the HARQ-ACK (Al, A2) of 2 bits or less, and the resources reserved or mapped for the HARQ-ACK (Bl) of more than 2 bits.

[0103] As for the resource allocation operation for the CSI part 1 (Cl) corresponding to TRP #1, the CSI part 1 (C2) corresponding to TRP #2, the CSI part 2 (Dl) corresponding to TRP #1, the CSI part 2 (D2) corresponding to TRP #2, and the data (E), the same can also be performed as in the resource allocation operation 1.

[0104] In this case, when the resource allocation of the CSI part 2 and the data in the resources reserved for the HARQ-ACK of 2 bits or less is allowed, the resources for the HARQ-ACK (Al, A2) of 2 bits or less can be utilized for the CSI part 2 (Dl, D2) and the data (E). On the other hand, the resources for the HARQ-ACK (Al, A2) of more than 2 bits cannot be utilized.

[0105] <resource allocation operation 3>

[0106] The UE controls the resource allocation in accordance with the following order (or, priority).

[0107] A1 / 2 > B1 > B2 > C1 > C2 > D1 > D2 > E

[0108] Further, the UE controls the information allocation in accordance with the following order (or, priority).

[0109] B1 > B2 > C1 > C2 > D1 > D2 > E > A1 / 2

[0110] For example, first, the UE reserves the allocation resource for the transmission of 2 bits or less of HARQ-ACK (A1 and A2) corresponding to a specific TRP (here, TRP #1) and other TRPs (here, TRP #2). That is, regardless of the TRP index (or, no priority is set between the TRPs), the UE ensures the allocation resource for 2 bits or less of HARQ-ACK corresponding to all of the TRPs (here, TRP #1 and TRP #2) as 1 HARQ-ACK.

[0111] Next, the resource allocation operation is performed for HARQ-ACK (B1) of more than 2 bits corresponding to TRP #1, HARQ-ACK (B2) of more than 2 bits corresponding to TRP #1, CSI part 1 (C1) corresponding to TRP #1, CSI part 1 (C2) corresponding to TRP #2, CSI part 2 (D1) corresponding to TRP #1, CSI part 2 (D2) corresponding to TRP #2, and data (E). The resource allocation operation for B1, B2, C1, C2, D1, D2, and E can also be performed similarly to the resource allocation operation 1.

[0112] In addition, for other UCI than 2 bits or less of HARQ-ACK (A1, A2), the resource allocation operation can also be controlled as 1 UCI regardless of the TRP index.

[0113] (Second method)

[0114] In the second method, the priority of channel state information (CSI) is controlled based on the TRP and the type of uplink control information (for example, channel state information). In addition, the channel in which the CSI is multiplexed can be an uplink control channel (for example, PUCCH), or an uplink shared channel (for example, PUSCH).

[0115] Figure 3An example of a case where UCI corresponding to reference signals (DL RSs) respectively transmitted from 2 TRPs (e.g., TRP #1 and TRP #2) is multiplexed to the same (or one) PUCCH or PUSCH and transmitted. The DL RSs can also be CSI-RSs, SS / PBCH blocks, or the like. In addition, the number of TRPs used for communication is not limited thereto. Furthermore, here, a case where UCI is multiplexed to a PUCCH or PUSCH transmitted to a specific TRP (e.g., TRP #1) is shown, but is not limited thereto.

[0116] In a case where a plurality of CSIs are transmitted in the same resource (e.g., at least one of a frequency resource and a time resource), the UE can also determine that the plurality of CSIs collide and control the transmission operation of the CSI. For example, in a case where the time period (e.g., time occupancy) of a physical channel (PUCCH or PUSCH) scheduled for transmission of a CSI report overlaps in at least one OFDM symbol in the same carrier, the UE can also determine that the CSIs collide.

[0117] The plurality of CSI reports (or CSI types) transmitted from each TRP can include at least one of a periodic CSI (P-CSI) report, an aperiodic CSI (A-CSI) report, and a semi-persistent CSI (SP-CSI) report.

[0118] In a case where CSI reports corresponding to a plurality of TRPs collide, the UE can also control the CSI reports based on a specific priority corresponding to each CSI report. For example, the UE can also apply at least one of the following CSI report priority rules 1-5 to control the CSI reports.

[0119] In addition, in the following description, a case where control is performed so that a CSI having a specific value (Pri iCSI (y, k, c, s, j TRP ) decided based on the CSI type and the TRP or the like is transmitted with priority is shown. For example, in a case where 2 CSIs collide, control is performed so that a CSI report having a relatively high value of Pri iCSI (y, k, c, s, j TRP ) is not transmitted (a CSI report having a relatively low value of Pri iCSI (y, k, c, s, j TRP ) is transmitted). In addition, Pri icSI (y, k, c, s, j TRPThis is one example, but it is not limited to this. You can also replace some parameters with other values, or add other parameters.

[0120] <Priority Rule 1>

[0121] In Priority Rule 1, the UE largely considers the TRP type to determine the priority of CSI reports (e.g., the priority of the CSI to be sent). For example, a specific value is defined as the benchmark for the priority of CSI reports (Pri) as follows. iCSI (y, k, c, s, j) TRP (Mathematical formula (1)).

[0122] [Mathematical Expression 1]

[0123] Mathematical formula (1)

[0124] Pri iCSI (y, k, c, s, j) TRP ) = 6·N cells ·M s ·j TRP +2·N cells ·M s ·y+N cells ·M s ·k+M s ·C+s

[0125] N cells : Values ​​set by higher-level parameters (e.g., maxNrofServingCells)

[0126] M s : The value set by higher-level parameters (e.g., maxNrofCSI-ReportConfigurations)

[0127] j TRP TRP Index

[0128] y: The value determined by the type of CSI report

[0129] k: A value determined by the content sent in the CSI report.

[0130] c: Serving Cell Index

[0131] s: Report structure ID (reportConfigID)

[0132] j TRPIt can also be a value set by a higher layer parameter (for example, TRP ID or DMRS group ID, or the like). Furthermore, y is determined by the CSI type, and for example, it can be set as follows: y = 0 for aperiodic CSI reporting transmitted by PUSCH; y = 1 for semi-persistent CSI reporting transmitted by PUSCH; y = 2 for semi-persistent reporting transmitted by PUCCH; and y = 3 for periodic CSI reporting transmitted by PUCCH. Furthermore, k is determined by the content of the CSI report transmitted, and it can be set as follows: k = 0 for a CSI report in which L1-RSRP is transmitted; and k = 1 for a CSI report in which L1-RSRP is not transmitted.

[0133] In mathematical expression (1), the coefficient of the parameter (for example, j TRP ) corresponding to the information (for example, TRP index) related to the TRP (here, 6) is set to be larger than the coefficient of the parameter (y) corresponding to the CSI type (here, 2). That is, in mathematical expression (1), the specific value (Pri iCSI (y, k, c, s, j TRP )) is determined based more on the TRP type (for example, TRP index) than on the CSI type.

[0134] Furthermore, here, a case in which the CSI report corresponding to the TRP with a relatively small index (for example, TRP #1) is transmitted in preference to the CSI report corresponding to the TRP with a relatively large index (for example, TRP #2) is shown, but it is not limited thereto. It can also be controlled so as to prefer the CSI report corresponding to the TRP with a large index.

[0135] The priority of the CSI report is determined using mathematical expression (1), whereby it is possible to determine the CSI report to be reported based on the TRP. By this, in a case in which communication is performed using a plurality of TRPs, in a case in which the UE is located in the vicinity of a specific TRP, it is possible to select the CSI corresponding to the specific TRP and perform CSI reporting.

[0136] <Priority rule 2>

[0137] In priority rule 2, the UE determines the priority of the CSI report (for example, the priority of the CSI to be transmitted) with a large degree of consideration of the CSI type. For example, the specific value (Pri iCSI (y, k, c, s, jTRP)) (mathematical expression (2)) is defined as a reference for the priority of the CSI report.

[0138] [Mathematical expression 2]

[0139] Mathematical expression (2)

[0140] PriiCSI (y, k, c, s, j TRP ) = N TRPs · 2 · N cells · M s · y + 2 · N cells · M s · j TRP + N cells · M s · k + M s · c + s

[0141] N TRPs : maximum number of TRP

[0142] N cells : value set by a higher layer parameter (e.g., maxNrofServingCells)

[0143] M s : value set by a higher layer parameter (e.g., maxNrofCSI-ReportConfigurations)

[0144] j TRP : TRP index

[0145] y: value determined by CSI report type

[0146] k: value determined by content transmitted by CSI report

[0147] c: serving cell index

[0148] s: report structure ID (reportConfigID)

[0149] N TRPs may also be a value set by a higher layer parameter (e.g., MAXNofTRP, etc.). Furthermore, j TRP , y, k can also be set in the same manner as mathematical expression (1).

[0150] In mathematical expression (2), the coefficient (here, 2) of the parameter (y) corresponding to the CSI type is set to be the same as the coefficient (here, 2) of the parameter (e.g., j TRP ) corresponding to the TRP-related information, and further, y is multiplied by the maximum number of TRPs (N TRPs ). That is, in mathematical expression (2), a specific value (Pri iCSI (y, k, c, s, j TRP )) is determined more based on the CSI type than the TRP type (e.g., TRP index).

[0151] For example, the priority is set in the order of aperiodic CSI > semi-persistent CSI > periodic CSI. Further, for CSI reports of the same CSI type, a CSI report with a smaller corresponding TRP index can also be prioritized.

[0152] By determining the priority of the CSI report using mathematical expression (2), it is possible to determine the CSI report to be reported based on the type of the CSI report even in the case of communication with multiple TRPs.

[0153] <Priority rule 3>

[0154] In priority rule 3, the UE determines the priority of the CSI report (for example, the priority of the CSI to be transmitted) in consideration of the CSI type, the maximum number of TRPs (maximum number), the content of the CSI report, the cell index, and the like. For example, the following specific values (Pri iCSI (y, k, c, s, j TRP ) (mathematical expression (3)).

[0155] [Mathematical expression 3]

[0156] Mathematical expression (3)

[0157] Pri iCSI (y, k, c, s, j TRP ) = 2 · N TRPs · N cells · M s · y + N TRPs · N cells · M s · k + N cells · M s · j TRP + M s · c + s

[0158] N TRPs : maximum number of TRPs

[0159] N cells : value set by a higher layer parameter (for example, maxNrofServingCells)

[0160] M s : value set by a higher layer parameter (for example, maxNrofCSI-ReportConfigurations)

[0161] j TRP : TRP index

[0162] y: value determined by the CSI report type

[0163] k: a value decided by the content transmitted by the CSI report

[0164] c: a serving cell index

[0165] s: a report configuration ID (reportConfigID)

[0166] N can also be set as in Mathematical Expression (1) TRPs , j TRP , y, k.

[0167] In Mathematical Expression (3), the coefficient (here, 2) of the parameter (y) corresponding to the CSI type is set to be larger than the coefficient (here, 1) of the parameter (for example, j TRP ) corresponding to the TRP-related information. That is, in Mathematical Expression (3), the specific value (Pri iCSI (y, k, c, s, j TRP )) is decided based more on the CSI type than on the TRP type (for example, the TRP index).

[0168] For example, the priority is set in the order of aperiodic CSI > semi-persistent CSI > periodic CSI. Furthermore, for CSI reports of the same CSI type, the priority is decided based on the content transmitted by the CSI report and the corresponding TRP. For example, for CSI reports of the same CSI type, a CSI report that transmits L1-RSRP is prioritized over a CSI report that does not transmit L1-RSRP. Further, in the case where the content transmitted by the CSI report is the same, a CSI report of a smaller corresponding TRP index can also be prioritized.

[0169] By deciding the priority of the CSI report using Mathematical Expression (3), it is possible to decide the CSI report to be reported based on the type of the CSI report even in the case of communicating with multiple TRPs.

[0170] [Priority Rule 4]

[0171] In Priority Rule 4, the specific value (Pri iCSI (y, k, c, s, j TRP ) that becomes the basis for the priority of the CSI report is defined as in Mathematical Expression (4).

[0172] [Mathematical Expression 4]

[0173] Mathematical Expression (4)

[0174] Pri iCSI (y, k, c, s, j TRP ) = 2 · N cells• N TRPs • M s • y + N cells • N TRPs • M s • k + N TRPs • M s • c + M s • j TRP + s

[0175] N TRPs : maximum number of TRP

[0176] N cells : value set by a higher layer parameter (e.g., maxNrofServingCells)

[0177] M s : value set by a higher layer parameter (e.g., maxNrofCSI-ReportConfigurations)

[0178] j TRP : TRP index

[0179] y: value determined by CSI report type

[0180] k: value determined by content transmitted by CSI report

[0181] c: serving cell index

[0182] s: report structure ID (reportConfigID)

[0183] N TRPs , j TRP , y, k can also be set in the same manner as mathematical expression (1).

[0184] For example, the priority is set in the order of aperiodic CSI > semi-persistent CSI > periodic CSI. Furthermore, for CSI reports of the same CSI type, the priority is determined based on the content transmitted by the CSI report, the cell index, and the corresponding TRP. For example, for CSI reports of the same CSI type, a CSI report that transmits L1-RSRP is prioritized over a CSI report that does not transmit L1-RSRP. Furthermore, for CSI reports of the same CSI type, a CSI report corresponding to a cell with a smaller index is prioritized. Further, for CSI reports of the same cell index, a CSI report with a smaller TRP index corresponding thereto can also be prioritized.

[0185] <Priority Rule 5>

[0186] In Priority Rule 5, for example, a specific value is defined as the benchmark for the priority of CSI reports (Pri). iCSI (y, k, c, s, j) TRP (Mathematical formula (5)).

[0187] [Mathematical Expression 5]

[0188] Mathematical formula (5)

[0189] Pri iCSI (y, k, c, s, j) TRP )=2·N cells ·M s ·N TRPs ·y+N cells ·M s ·N TRPs ·k+M s ·N TRPs ·c+N TRPs ·s+j TRP

[0190] N TRPs The maximum number of TRPs.

[0191] N cells : Values ​​set by higher-level parameters (e.g., maxNrofServingCells)

[0192] M s : The value set by higher-level parameters (e.g., maxNrofCSI-ReportConfigurations)

[0193] j TRP TRP Index

[0194] y: The value determined by the type of CSI report

[0195] k: A value determined by the content sent in the CSI report.

[0196] c: Serving Cell Index

[0197] s: Report structure ID (reportConfigID)

[0198] N can also be set in the same way as mathematical formula (1). TRPs j TRP , y, k.

[0199] For example, priorities are set in the order of aperiodic CSI > semi-persistent CSI > periodic CSI. Further, for CSI reports of the same CSI type, priorities are decided based on the content transmitted by the CSI report, the cell index, and the corresponding TRP. For example, for CSI reports of the same CSI type, a CSI report that transmits L1-RSRP is prioritized over a CSI report that does not transmit L1-RSRP. Further, for CSI reports of the same CSI type, a CSI report corresponding to a cell with a smaller index is prioritized. Further, a CSI report with a smaller reporting structure index is prioritized. Further, for CSI reports of the same reporting structure index, a CSI report corresponding to a TRP with a smaller index can also be prioritized.

[0200] (Wireless communication system)

[0201] Hereinafter, a structure of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof.

[0202] Figure 4 FIG. 1 is a diagram illustrating an example of a schematic structure of a wireless communication system according to an embodiment. The wireless communication system 1 can also be a system that realizes communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.

[0203] Further, the wireless communication system 1 can also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). The MR-DC can include E-UTRA-NR Dual Connectivity (EN-DC) of LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR, NR-E-UTRA Dual Connectivity (NE-DC) of NR and LTE, and the like.

[0204] In EN-DC, a base station (eNB) of LTE (E-UTRA) is a master node (MN), and a base station (gNB) of NR is a secondary node (SN). In NE-DC, a base station (gNB) of NR is an MN, and a base station (eNB) of LTE (E-UTRA) is an SN.

[0205] The wireless communication system 1 can also support dual connectivity between a plurality of base stations within the same RAT (for example, NR-NR dual connectivity (NN-DC) in which both the MN and the SN are base stations (gNBs) of NR).

[0206] The wireless communication system 1 can also have a base station 11 that forms a macro cell C1 with a wide coverage, and base stations 12 (12a-12c) that are configured within the macro cell C1 and form small cells C2 that are narrower than the macro cell C1. The user terminal 20 can also be located within at least one cell. The configuration, number, and the like of the cells and the user terminal 20 are not limited to the manner shown in the drawing. Hereinafter, the base stations 11 and 12 are collectively referred to as base stations 10 without distinction.

[0207] The user terminal 20 can also be connected to at least one of a plurality of base stations 10. The user terminal 20 can also use at least one of carrier aggregation (CA) using a plurality of component carriers (CCs) and dual connectivity (DC).

[0208] Each CC can be included in at least one of a first frequency band (frequency range 1 (FR1)) and a second frequency band (frequency range 2 (FR2)). The macro cell C1 can be included in the FR1, and the small cell C2 can be included in the FR2. For example, the FR1 can be a frequency band of 6 GHz or less (sub-6 GHz), and the FR2 can be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands, definitions, and the like of the FR1 and the FR2 are not limited thereto, and for example, the FR1 can correspond to a frequency band higher than the FR2.

[0209] Furthermore, the user terminal 20 can use at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC to perform communication.

[0210] The plurality of base stations 10 can also be connected through wired (for example, optical fiber based on Common Public Radio Interface (CPRI), X2 interface, and the like) or wireless (for example, NR communication). For example, in a case where NR communication is utilized as a backhaul between the base stations 11 and 12, the base station 11 equivalent to an upper station can also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station can also be referred to as an IAB node.

[0211] The base station 10 can also be connected to the core network 30 via another base station 10 or directly. The core network 30 can also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0212] The user terminal 20 can also be a terminal that supports at least one of LTE, LTE-A, 5G, and the like.

[0213] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) can also be utilized. For example, in at least one of Downlink (DL) and Uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), and the like can also be utilized.

[0214] The wireless access scheme can also be referred to as a waveform. In addition, in the wireless communication system 1, other wireless access schemes (for example, other single carrier transmission schemes, other multicarrier transmission schemes) can also be applied to the wireless access schemes in UL and DL.

[0215] In the wireless communication system 1, as a downlink channel, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared among the user terminals 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), and the like can also be used.

[0216] Further, in the wireless communication system 1, as an uplink channel, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared among the user terminals 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), and the like can also be used.

[0217] User data, higher layer control information, a System Information Block (SIB), and the like are transmitted through the PDSCH. User data, higher layer control information, and the like can also be transmitted through the PUSCH. Further, a Master Information Block (MIB) can also be transmitted through the PBCH.

[0218] Lower layer control information can also be transmitted through the PDCCH. The lower layer control information can also include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0219] In addition, the DCI that schedules the PDSCH can also be referred to as a DL assignment, a DL DCI, or the like, and the DCI that schedules the PUSCH can also be referred to as an UL grant, an UL DCI, or the like. In addition, the PDSCH can also be replaced with DL data, and the PUSCH can also be replaced with UL data.

[0220] In the detection of the PDCCH, a control resource set (CORESET) and a search space can also be utilized. The CORESET corresponds to a resource in which the DCI is searched for. The search space corresponds to a search area of the PDCCH candidate and a search method. One CORESET can also be associated with one or a plurality of search spaces. The UE can also monitor the CORESET associated with a certain search space based on a search space configuration.

[0221] One search space can also correspond to the PDCCH candidate that matches one or a plurality of aggregation levels. One or a plurality of search spaces can also be referred to as a search space set. In addition, the "search space", "search space set", "search space configuration", "search space set configuration", "CORESET", "CORESET configuration", and the like of the present disclosure can also be replaced with each other.

[0222] The uplink control information (UCI) including at least one of the channel state information (CSI), the delivery confirmation information (for example, also referred to as the hybrid automatic repeat request (HARQ-ACK), ACK / NACK, and the like), and the scheduling request (SR) can also be transmitted through the PUCCH. The random access preamble for establishing a connection with the cell can also be transmitted through the PRACH.

[0223] In addition, in the present disclosure, the downlink, the uplink, and the like can also be expressed without the "link". Furthermore, it can also be expressed without the "physical" at the beginning of various channels.

[0224] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like can also be transmitted. In the wireless communication system 1, as the 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)), and the like can also be transmitted.

[0225] The synchronization signal can be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)). A signal block including the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) can also be referred to as an SS / PBCH block, an SS block (SS Block (SSB)), or the like. In addition, the SS, the SSB, and the like can also be referred to as a reference signal.

[0226] Further, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), and the like can also be transmitted. In addition, the DMRS can also be referred to as a user terminal-specific reference signal (UE-specific Reference Signal).

[0227] (Base station)

[0228] Figure 5is a drawing showing an example of a structure of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission path interface (transmission line interface) 140. Note that the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140 can each be provided more than one.

[0229] In addition, in the present example, functional blocks of the characteristic part in the present 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 can also be omitted.

[0230] The control unit 110 implements control of the entire base station 10. The control unit 110 can be configured of a controller, a control circuit, or the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0231] The control unit 110 can also control generation of a signal, scheduling (for example, resource allocation, mapping), and the like. The control unit 110 can also control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140. The control unit 110 can also generate data, control information, a sequence, and the like transmitted as a signal, and forward to the transmission / reception unit 120. The control unit 110 can also perform call processing (setting, release, and the like) of a communication channel, state management of the base station 10, management of wireless resources, and the like.

[0232] The transmission / reception unit 120 can include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 can include a transmission processing unit 1211 and a reception processing unit 1212. The transmission / reception unit 120 can be configured of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0233] The transmission / reception unit 120 can be configured as an integrated transmission / reception unit, or can be configured of a transmission unit and a reception unit. The transmission unit can be configured of the transmission processing unit 1211 and the RF unit 122. The reception unit can be configured of the reception processing unit 1212, the RF unit 122, and the measurement unit 123.

[0234] The transmission / reception antenna 130 can be constituted by an antenna such as an array antenna and the like, which can be explained based on common knowledge in the technical field to which the present disclosure pertains.

[0235] The transmission / reception unit 120 can also transmit the downlink channel, the synchronization signal, the downlink reference signal, and the like described above. The transmission / reception unit 120 can also receive the uplink channel, the uplink reference signal, and the like described above.

[0236] The transmission / reception unit 120 can also form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.

[0237] The transmission / reception unit 120 (transmission processing unit 1211) can also generate a bit string to be transmitted, for example, by performing processing of a Packet Data Convergence Protocol (PDCP) layer, processing of a Radio Link Control (RLC) layer (for example, RLC retransmission control), processing of a Medium Access Control (MAC) layer (for example, HARQ retransmission control), and the like, with respect to data, control information, and the like acquired from the control unit 110.

[0238] The transmission / reception unit 120 (transmission processing unit 1211) can also perform transmission processing of channel coding (which can include error correction coding), modulation, mapping, filter processing, Discrete Fourier Transform (DFT) processing (as necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, digital-analog conversion, and the like, with respect to the bit string to be transmitted, and output a baseband signal.

[0239] The transmission / reception unit 120 (RF unit 122) can also perform modulation to a wireless band, filter processing, amplification, and the like, with respect to the baseband signal, and transmit a signal of the wireless band via the transmission / reception antenna 130.

[0240] On the other hand, the transmission / reception unit 120 (RF unit 122) can also perform amplification, filter processing, demodulation to a baseband signal, and the like, with respect to a signal of the wireless band received by the transmission / reception antenna 130.

[0241] The transmission / reception unit 120 (reception processing unit 1212) can also apply, to the acquired baseband signal, reception processing such as analog-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as necessary), filter processing, demapping, demodulation, decoding (which can also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, and the like, to acquire user data and the like.

[0242] The transmission / reception unit 120 (measurement unit 123) can also perform measurements related to the received signal. For example, the measurement unit 123 can also perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, and the like, based on the received signal. The measurement unit 123 can also perform measurements with respect to received power (for example, Reference Signal Received Power (RSRP)), received quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (for example, Received Signal Strength Indicator (RSSI)), propagation path information (for example, CSI), and the like. The measurement results can also be output to the control unit 110.

[0243] The transmission path interface 140 can also transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, and the like, and can also acquire, transmit, and the like, user data (user plane data), control plane data, and the like, for the user terminal 20.

[0244] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure can also be configured by at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.

[0245] Further, the transmission / reception unit 120 transmits a DL signal (for example, a PDSCH, a DL reference signal, and the like). In addition, the transmission / reception unit 120 receives uplink control information corresponding to the DL signal.

[0246] The control unit 110 controls reception of the uplink control information based on the kind of the uplink control information and the corresponding transmission / reception point, judges the order of resource allocation for the uplink control information and the priority of the uplink control information.

[0247] (User terminal)

[0248] Figure 6 is a diagram showing an example of the structure of a user terminal according to an embodiment. The user terminal 20 is provided with a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. In addition, one or more of the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 can be provided.

[0249] In addition, in this example, mainly the functional blocks of the characteristic part in the present embodiment are shown, and the user terminal 20 can also be assumed to have other functional blocks necessary for wireless communication. A part of the processing of each unit described below can also be omitted.

[0250] The control unit 210 implements control of the entire user terminal 20. The control unit 210 can be constituted by a controller, a control circuit, or the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0251] The control unit 210 can also control generation, mapping, and the like of a signal. The control unit 210 can also control transmission / reception, measurement, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, a sequence, and the like transmitted as a signal, and forward to the transmission / reception unit 220.

[0252] The transmission / reception unit 220 can include a baseband unit 221, an RF unit 222, a measurement unit 223. The baseband unit 221 can include a transmission processing unit 2211, a reception processing unit 2212. The transmission / reception unit 220 can be constituted by a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0253] The transmission / reception unit 220 can be constituted as an integrated transmission / reception unit, or can be constituted by a transmission unit and a reception unit. The transmission unit can be constituted by the transmission processing unit 2211 and the RF unit 222. The reception unit can be constituted by the reception processing unit 2212, the RF unit 222, and the measurement unit 223.

[0254] The transmission / reception antenna 230 can be constituted by an antenna such as an array antenna and the like based on common knowledge in the technical field to which the present disclosure pertains.

[0255] The transmission / reception unit 220 can also transmit the above-described downlink channel, synchronization signal, downlink reference signal, and the like. The transmission / reception unit 220 can also receive the above-described uplink channel, uplink reference signal, and the like.

[0256] The transmission / reception unit 220 can also form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.

[0257] The transmission / reception unit 220 (transmission processing unit 2211) can also, for example, perform processing of a PDCP layer, processing of an RLC layer (for example, RLC retransmission control), processing of a MAC layer (for example, HARQ retransmission control), and the like with respect to data, control information, and the like acquired from the control unit 210, generate a bit string to be transmitted.

[0258] The transmission / reception unit 220 (transmission processing unit 2211) can also perform channel coding (may also include error correction coding), modulation, mapping, filter processing, DFT processing (as necessary), IFFT processing, precoding, digital-analog conversion, and the like as transmission processing with respect to the bit string to be transmitted, and output a baseband signal.

[0259] In addition, whether or not to apply DFT processing can also be based on the setting of transform precoding. With respect to a certain channel (for example, PUSCH), in a case where transform precoding is activated (enabled), the transmission / reception unit 220 (transmission processing unit 2211) can also perform DFT processing as the above-described transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, and in a case where this is not so, the transmission / reception unit 220 (transmission processing unit 2211) can also not perform DFT processing as the above-described transmission processing.

[0260] The transmission / reception unit 220 (RF unit 222) can also perform modulation to a wireless band, filter processing, amplification, and the like with respect to the baseband signal, and transmit a signal of the wireless band via the transmission / reception antenna 230.

[0261] On the other hand, the transmission / reception unit 220 (RF unit 222) can also perform amplification, filter processing, demodulation to a baseband signal, and the like with respect to a signal of the wireless band received by the transmission / reception antenna 230.

[0262] The transmission / reception unit 220 (reception processing unit 2212) can also apply, to the acquired baseband signal, reception processing such as analog-digital conversion, FFT processing, IDFT processing (as necessary), filter processing, demapping, demodulation, decoding (which can include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, and the like, to acquire user data and the like.

[0263] The transmission / reception unit 220 (measurement unit 223) can also perform measurement related to the received signal. For example, the measurement unit 223 can also perform RRM measurement, CSI measurement, and the like, based on the received signal. The measurement unit 223 can also perform measurement with respect to reception power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like. The measurement result can also be output to the control unit 210.

[0264] In addition, the transmission unit and the reception unit of the user terminal 20 in the present disclosure can also be constituted by at least one of the transmission / reception unit 220 and the transmission / reception antenna 230.

[0265] In addition, the transmission / reception unit 220 transmits uplink control information (for example, HARQ-ACK, CSI, and the like) corresponding to DL signals (for example, PDSCH, DL reference signals, and the like) respectively transmitted from a plurality of transmission / reception points.

[0266] The control unit 210 can also decide at least one of the resource allocation order and the mapping order for the uplink control information based on the kind of the uplink control information and the corresponding transmission / reception point. Further, the control unit 210 can also decide the priority of the uplink control information (for example, CSI) based on the kind of the uplink control information and the corresponding transmission / reception point.

[0267] Further, in a case where a plurality of channel state information parts 1 and 2 are included in the uplink control information, the control unit 210 can also decide the resource allocation order with priority to the channel state information part 1 over the channel state part 2.

[0268] Further, the control unit 210 can also allow the allocated resource of the channel state information part 2 to be used for mapping of a specific delivery confirmation signal.

[0269] Further, the control unit 210 can also decide the priority of the channel state information to be transmitted based on the kind of the channel state information and the index of the transmission / reception point. Alternatively, the control unit 210 can also decide the priority of the channel state information to be transmitted based on the number of transmission / reception points.

[0270] (Hardware structure)

[0271] In addition, the block diagrams used in the description of the above-described embodiments show blocks of functional units. These functional blocks (structural units) are realized by any combination of hardware and software, at least one of them. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block can be realized by one device physically or logically integrated, or by two or more devices physically or logically separated and connected directly or indirectly (for example, by wire, wireless, or the like). The functional block can also be realized by combining the above-described one device or the above-described multiple devices with software.

[0272] Here, in the functions, there are judgment, decision, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, and the like, but are not limited to these. For example, a functional block (structural unit) that realizes a transmission function can also be referred to as a transmitting unit, a transmitter, or the like. Any one of them is as described above, and the method of realization is not particularly limited.

[0273] For example, the base station, the user terminal, and the like in one embodiment of the present disclosure can also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 7 is a diagram that shows an example of the hardware structure of the base station and the user terminal according to one embodiment. The above-described base station 10 and the user terminal 20 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.

[0274] In addition, in the present disclosure, the terms of device, circuit, equipment, section, unit, and the like can be replaced with each other. The hardware structure of the base station 10 and the user terminal 20 can be configured to include one or more of each device shown in the diagram, or can be configured not to include a part of the devices.

[0275] For example, the processor 1001 is only illustrated one, but there can be a plurality of processors. Furthermore, the processing can be executed by one processor, or can be executed by two or more processors simultaneously, sequentially, or with other methods. In addition, the processor 1001 can be realized by one or more chips.

[0276] As for each function in the base station 10 and the user terminal 20, at least one of the operation by the processor 1001 and the control of the communication via the communication device 1004, or the control of the readout and the writing of the data in the memory 1002 and the storage 1003 is realized, for example, by reading a specific software (program) into the hardware such as the processor 1001, the memory 1002, and the like, and thereby the operation and the control by the processor 1001 are performed.

[0277] The processor 1001 causes, for example, an operation system to operate to control the entire computer. The processor 1001 can also be constituted by a central processing device (Central Processing Unit (CPU)) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, at least a part of the above-described control unit 110 (210), the transmission-reception unit 120 (220), and the like can also be realized by the processor 1001.

[0278] Furthermore, the processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processing according to them. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiments can be used. For example, the control unit 110 (210) can also be realized by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be applied to other functional blocks.

[0279] The memory 1002 can also be a computer-readable recording medium, for example, constituted by at least one of a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), other appropriate storage medium. The memory 1002 can also be referred to as a register, a cache, a main storage (main storage device), and the like. The memory 1002 can hold a program (program code), a software module, and the like that can be executed in order to implement the wireless communication method related to one embodiment of the present disclosure.

[0280] The storage 1003 can also be a computer-readable recording medium such as at least one of a flexible disc, a floppy (registered trademark) disc, a magneto-optical disc (e.g., a compact disc read-only memory (CD-ROM) and the like), a digital versatile disc, a Blu-ray (registered trademark) disc, a removable disc, a hard disc drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, and the like. The storage 1003 can also be referred to as an auxiliary storage device.

[0281] The communication device 1004 is hardware (a transceiver device) for performing communication between computers via at least one of a wired network and a wireless network, also referred to as a network device, a network controller, a network card, a communication module, and the like. The communication device 1004 can also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). The above-described transceiver 120 (220), a transceiver antenna 130 (230), and the like can also be implemented by the communication device 1004. The transceiver 120 (220) can also be installed physically or logically separately by a transmission unit 120a (220a) and a reception unit 120b (220b).

[0282] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from an outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, and the like) that performs an output to an outside. In addition, the input device 1005 and the output device 1006 can also be a structure that is integrated (e.g., a touch panel).

[0283] Furthermore, the processor 1001, the memory 1002, and the like are connected through a bus 1007 for communication of information. The bus 1007 can be configured with a single bus, or can be configured with different buses between the devices.

[0284] Furthermore, the base station 10 and the user terminal 20 can also be configured to include a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and the like hardware, and a part or all of the functional blocks can also be implemented with the hardware. For example, the processor 1001 can also be installed with at least one of these hardware.

[0285] (Modified example)

[0286] In addition, the terms described in the present disclosure and the terms necessary for understanding the present disclosure can also be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (a signal or signaling) can also be replaced with each other. In addition, a signal can also be a message. A Reference Signal (RS) can also be simply referred to as RS, and can also be referred to as a Pilot, a Pilot signal, and the like according to the applied standard. In addition, a Component Carrier (CC) can also be referred to as a cell, a frequency carrier, a carrier frequency, and the like.

[0287] A radio frame can also be constituted by one or a plurality of periods (frames) in the time domain. Each period (frame) constituting the radio frame can also be referred to as a subframe. Further, a subframe can also be constituted by one or a plurality of slots in the time domain. A subframe can also be a fixed time length (for example, 1 ms) independent of numerology.

[0288] Here, numerology can also refer to a communication parameter applied in at least one of transmission and reception of a certain signal or channel. For example, numerology can also indicate at least one of a SubCarrier Spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a Transmission Time Interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering processing performed by a transmitter-receiver in the frequency domain, a specific windowing processing performed by the transmitter-receiver in the time domain, and the like.

[0289] A slot can also be composed of one or a plurality of symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, and the like) in the time domain. In addition, a slot can also be a time unit based on a numerology.

[0290] A slot can also include a plurality of mini-slots. Each mini-slot can also be composed of one or a plurality of symbols in the time domain. In addition, a mini-slot can also be referred to as a sub-slot. A mini-slot can also be composed of a smaller number of symbols than a slot. A PDSCH (or PUSCH) transmitted in a larger time unit than a mini-slot can also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot can also be referred to as PDSCH (PUSCH) mapping type B.

[0291] A radio frame, a subframe, a slot, a mini-slot, and a symbol each represent a time unit for transmitting a signal. A radio frame, a subframe, a slot, a mini-slot, and a symbol can also be referred to by other names respectively corresponding thereto. In addition, a time unit in the disclosure, such as a frame, a subframe, a slot, a mini-slot, a symbol, and the like, can be replaced with each other.

[0292] For example, one subframe can also be referred to as a TTI, a plurality of consecutive subframes can also be referred to as a TTI, one slot or one mini-slot can also be referred to as a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in the existing LTE, can be a period shorter than 1 ms (for example, 1-13 symbols), or can be a period longer than 1 ms. In addition, a unit representing a TTI can not be referred to as a subframe, but can be referred to as a slot, a mini-slot, or the like.

[0293] Here, a TTI, for example, refers to a minimum time unit of scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling in which a radio resource (a frequency bandwidth, a transmission power, and the like that can be used in each user terminal) is allocated to each user terminal in a TTI unit. In addition, the definition of a TTI is not limited thereto.

[0294] A TTI can also be a transmission time unit of a data packet (a transport block), a code block, a codeword, or the like that has been channel-encoded, and can also become a processing unit of scheduling, link adaptation, or the like. In addition, when a TTI is given, a time interval (for example, a number of symbols) to which a transport block, a code block, a codeword, or the like is actually mapped can be shorter than the TTI.

[0295] In addition, in a case where one slot or one mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) can also be a minimum time unit of scheduling. In addition, the number of slots (mini-slots) constituting the minimum time unit of scheduling can also be controlled.

[0296] A TTI having a time length of 1 ms can 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 slot, etc. A TTI shorter than the normal TTI can also be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

[0297] In addition, the long TTI (e.g., normal TTI, subframe, etc.) can also be replaced with a TTI having a time length of more than 1 ms, and the short TTI (e.g., shortened TTI, etc.) can also be replaced with a TTI having a TTI length shorter than the long TTI and a TTI length of 1 ms or more.

[0298] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and can also include one or more contiguous subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in the RB can also be the same regardless of the numerology, for example, can also be 12. The number of subcarriers included in the RB can also be determined based on the numerology.

[0299] In addition, the RB can also include one or more symbols in the time domain, and can also be the length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, etc. can also be constituted by one or more resource blocks, respectively.

[0300] In addition, one or more RBs can also be referred to as a physical RB (PRB), a subcarrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0301] In addition, the resource block can also be constituted by one or more resource elements (REs). For example, one RE can also be a wireless resource area of one subcarrier and one symbol.

[0302] The Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) can also represent a subset of consecutive common resource blocks (RBs) used for a certain parameter set in a carrier. Here, common RBs can also be determined by indexing RBs based on a common reference point of the carrier. PRBs can also be defined in a BWP and appended with numbers within that BWP.

[0303] A BWP can also include a UL BWP (BWP used by UL) and a DL BWP (BWP used by DL). For a UE, one or more BWPs can be set within a single carrier.

[0304] At least one of the configured BWPs can be active, and the UE may not intend to transmit or receive specific signals / channels outside of the active BWPs. Furthermore, terms such as "cell" and "carrier" in this disclosure can be replaced with "BWP".

[0305] Furthermore, the structures described above, such as radio frames, subframes, time slots, mini-time slots, and symbols, are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, and the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in many ways.

[0306] Furthermore, the information, parameters, etc., described in this disclosure can be represented by absolute values, relative values ​​with respect to a specific value, or other corresponding information. For example, wireless resources can also be indicated by a specific index.

[0307] In this disclosure, the names used for parameters, etc., are not limiting names in any respect. Furthermore, the mathematical expressions, etc., using these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name; therefore, the various names assigned to these various channels and information elements are not limiting names in any respect.

[0308] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be mentioned throughout the above description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0309] Furthermore, information, a signal, and the like can be output to at least one of a higher layer (upper layer) and a lower layer from the lower layer and a higher layer. Information, a signal, and the like can be input and output via a plurality of network nodes.

[0310] Information, a signal, and the like that are input and output can be saved in a specific location (for example, a memory) and can be managed using a management table. Information, a signal, and the like that are input and output can be overwritten, updated, or added. Information, a signal, and the like that are output can be deleted. Information, a signal, and the like that are input can be transmitted to another device.

[0311] The notification of information is not limited to the manner / embodiment described in the present disclosure and can be performed using another method. For example, the notification of information in the present disclosure can also be implemented by physical layer signaling (for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), high layer signaling (for example, Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), and the like), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0312] In addition, the physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like. Furthermore, the RRC signaling can also be referred to as an RRC message, for example, can also be an RRC connection setup message, an RRC connection reconfiguration message, and the like. Furthermore, the MAC signaling can also be notified using a MAC control element (MAC Control Element (CE)), for example.

[0313] Furthermore, the notification of specific information (for example, the notification of "X is") is not limited to explicit notification and can be performed implicitly (for example, by not performing the notification of the specific information or by the notification of other information).

[0314] The determination can be made by a value represented by one bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values (for example, comparison with a specific value).

[0315] Software, regardless of being referred to as software, firmware, middle-ware, micro-code, hardware description language, or by other names, should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, programs, sub-programs, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, and the like.

[0316] Furthermore, software, instructions, information, and the like can also be transmitted and received via a transmission medium. For example, in the case where software is transmitted from a website, a server, or other remote source using at least one of wired technologies (coaxial cable, optical fiber cable, twisted pair cable, Digital Subscriber Line (DSL), and the like) and wireless technologies (infrared rays, microwaves, and the like), at least one of these wired technologies and wireless technologies is included in the definition of the transmission medium.

[0317] The terms "system" and "network" used in the present disclosure can be used interchangeably. The "network" can also mean an apparatus (for example, a base station) included in the network.

[0318] In the present disclosure, the terms of “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”, “panel”, and the like can be used interchangeably.

[0319] In the present disclosure, the terms of “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”, “component carrier”, and the like can be used interchangeably. There is also a case where the base station is called with the terms of macro cell, small cell, femto cell, pico cell, and the like.

[0320] A base station can accommodate one or multiple (for example, three) cells. In the case where the base station accommodates multiple cells, the coverage area of the base station as a whole can be divided into multiple smaller areas, each of which can also be provided with a communication service by a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). The term of “cell” or “sector” refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides a communication service within the coverage.

[0321] In the present disclosure, the terms of “Mobile Station (MS)”, “user terminal”, “User Equipment (UE)”, “terminal”, and the like can be used interchangeably.

[0322] In some cases, mobile stations are also referred to as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or some other suitable terminology.

[0323] At least one of the base station and the mobile station can also be referred to as a transmission device, a reception device, a wireless communication device, or the like. In addition, at least one of the base station and the mobile station can also be a device mounted on a mobile body, a mobile body itself, or the like. The mobile body can be a vehicle (for example, a car, an airplane, or the like), can also be a mobile body that moves in an unmanned manner (for example, a drone, an automated driving vehicle, or the like), and can also be a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when a communication operation is performed. For example, at least one of the base station and the mobile station can also be a sensor or the like, an Internet of Things (IoT) device.

[0324] Furthermore, the base station in the present disclosure can also be replaced with a user terminal. For example, for a structure in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (for example, also referred to as Device-to-Device (D2D), Vehicle-to-Everything (V2X), or the like), each of the modes / embodiments of the present disclosure can also be applied. In this case, a structure in which the user terminal 20 has the functions of the base station 10 described above can also be provided. Furthermore, the expressions such as "uplink" and "downlink" can also be replaced with expressions corresponding to inter-terminal communication (for example, "side"). For example, the uplink channel, the downlink channel, or the like can also be replaced with a side channel.

[0325] Likewise, the user terminal in the present disclosure can also be replaced with a base station. In this case, a structure in which the base station 10 has the functions of the user terminal 20 described above can also be provided.

[0326] In the present disclosure, actions performed by a base station are sometimes also performed by its upper node depending on the situation. Obviously, in a network including one or more network nodes having a base station, various actions performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (for example, consider a Mobility Management Entity (MME), a Serving-Gateway (S-GW), and the like, but not limited to these), or a combination thereof.

[0327] The modes / embodiments explained in the present disclosure can be used individually, or in combination, and can also be used in switching as execution proceeds. Furthermore, the processing procedures, sequences, flowcharts, and the like of the modes / embodiments explained in the present disclosure can also be changed in order as long as there is no contradiction. For example, for the methods explained in the present disclosure, the elements of various steps are prompted using the order of the examples, but are not limited to the specific order prompted.

[0328] The modes / embodiments explained in the present disclosure can also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, 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 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, next-generation systems extended based on them, and the like. In addition, a plurality of systems can also be combined (for example, LTE or LTE-A, in combination with 5G, and the like) to be applied.

[0329] The description "based on" used in the present disclosure does not mean "only based on" as long as it is not particularly written. In other words, the description "based on" means both "only based on" and "at least based on".

[0330] Any reference to elements using the callings "first", "second", and the like used in the present disclosure does not completely limit the number or order of the elements. The callings can be used in the present disclosure as a convenient method of distinguishing between two or more elements. Therefore, a reference to first and second elements does not mean that only two elements can be used, or that the first element must be prior to the second element in some form.

[0331] The term "determining" as used in the disclosure encompasses a wide variety of actions. For example, "determining" can include "deciding", "calculating", "computing", "processing", "deriving", "investigating", "looking up" (e.g., looking up in a table, a database or another data structure), "ascertaining" and the like.

[0332] In addition, "determining" can also include "receiving", "transmitting", "inputting", "outputting", "accessing" (e.g., accessing data in a memory) and the like.

[0333] In addition, "determining" can also include "resolving", "selecting", "choosing", "establishing", "comparing" and the like. That is, "determining" can also include "determining" some action.

[0334] In addition, "determining" can also be replaced with "assuming", "expecting", "considering" and the like.

[0335] The term "connected", "coupled" or all their derivatives as used in the disclosure, means all the connections or couplings between two or more elements, directly or indirectly, and can include the case where one or more intermediate elements exist between the two elements "connected" or "coupled" with each other. The coupling or connection between elements can be physical, logical or a combination of these. For example, "connected" can also be replaced with "accessed".

[0336] In the present disclosure, in the case of connecting two elements, it can be considered that one or more electric wires, cables, printed electric connections, and the like are used, and electromagnetic energy having a wavelength in a wireless frequency domain, a microwave region, an optical (both visible and non-visible) region, and the like is used as several non-limiting and non-inclusive examples to be "connected" or "combined" with each other.

[0337] In the present disclosure, the term "A is different from B" can also mean "A and B are different from each other". In addition, the term can also mean "A and B are different from C, respectively". The terms "separate", "combine", and the like can also be interpreted as "different" in the same way.

[0338] In the present disclosure, in the case of using "include", "including", and variations thereof, these terms mean the same as the term "comprising" in an inclusive sense. Further, the term "or" used in the present disclosure does not mean the exclusive sense.

[0339] In the present disclosure, for example, in the case of adding an article to a noun after translation, such as a, an, and the in English, the present disclosure can also include the case where the noun after the article is plural.

[0340] The above has been described in detail with respect to the invention related to the present disclosure, but the invention related to the present disclosure is obviously not limited to the embodiments described in the present disclosure for those skilled in the art. The invention related to the present disclosure can be implemented as a modification and a change without departing from the spirit and scope of the invention determined based on the recitations of the claims. Therefore, the recitations of the present disclosure are for the purpose of illustrative description, and do not have any limiting meaning on the invention related to the present disclosure.

Claims

1. A terminal, comprising: a control unit that decides an order of mapping of contents in a channel state information (CSI) report based on the contents transmitted through the CSI report and a number of transmission-reception points (TRPs); and a transmission unit that transmits the CSI report.

2. A wireless communication method for a terminal, comprising: a step of deciding an order of mapping of contents in a channel state information (CSI) report based on the contents transmitted through the CSI report and a number of transmission-reception points (TRPs); and a step of transmitting the CSI report.

3. A base station, comprising: a control unit that judges an order of mapping of contents in a channel state information (CSI) report based on the contents transmitted through the CSI report and a number of transmission-reception points (TRPs); and a reception unit that receives the CSI report.

4. A system having a terminal and a base station, the terminal comprising: a control unit that decides an order of mapping of contents in a channel state information (CSI) report based on the contents transmitted through the CSI report and a number of transmission-reception points (TRPs); and a transmission unit that transmits the CSI report, the base station comprising: a reception unit that receives the CSI report.

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