Terminals and communication methods

Abstract

This terminal comprises: a reception unit that receives, from a base station, a downlink shared channel in virtual component carriers (CCs) that are non-continuous in a frequency domain including a plurality of real CCs; a control unit that determines feedback information related to retransmission control corresponding to the downlink shared channel; and a transmission unit that transmits, to the base station, an uplink control channel including the feedback information in the virtual CCs. The control unit constructs a code book for the feedback information in the order in which any of the virtual CCs or the real CCs is given first priority and the remaining CCs are given next priority.

Description

Technical Field

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

Background Art

[0002] In NR (New Radio), which is a successor system to LTE (Long Term Evolution) (also referred to as "5G"), technologies that satisfy requirements such as a large-capacity system, high data transmission speed, low latency, simultaneous connection of a large number of terminals, low cost, and power saving are being studied (for example, Non-Patent Document 1).

[0003] Furthermore, research on 6G as the next-generation wireless communication method after 5G has been started, and the realization of wireless quality exceeding 5G is expected. For example, in 6G, research is being advanced toward the realization of further increased capacity, use of new frequency bands, further reduced latency, further enhanced reliability, further reduced power consumption, and expansion of coverage in new areas (high altitude, sea, space) by non-terrestrial networks (for example, Non-Patent Document 2).

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

Non-Patent Document 2

Non-Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] Features that utilize broadband to secure data resources, such as carrier aggregation, are supported. When using carrier aggregation, it is necessary to schedule data resources for each carrier, so more flexible and efficient resource allocation is being considered. However, in broadband where the frequency domain is discontinuous, feedback behavior related to retransmission control has not been defined.

[0006] The present invention has been made in view of the above points, and aims to perform a feedback operation related to retransmission control in a wideband where the frequency domain is discontinuous in a wireless communication system. [Means for solving the problem]

[0007] According to the disclosed technology, the system includes a receiving unit that receives a downlink sharing channel from a base station in a virtual CC that is discontinuous in the frequency domain including multiple actual CCs (Component Carriers), a control unit that determines feedback information related to retransmission control corresponding to the downlink sharing channel, and a transmitting unit that transmits an uplink control channel including the feedback information to the base station in the virtual CC, wherein the control unit constructs a codebook of the feedback information in the order of prioritizing either the virtual CC or the actual CC, and then the remaining CC. The control unit constructs the codebook by constructing and linking subcodebooks for each virtual CC. A device will be provided. [Effects of the Invention]

[0008] According to the disclosed technology, in a wireless communication system, feedback operations related to retransmission control can be performed in a wideband where the frequency domain is discontinuous. [Brief explanation of the drawing]

[0009] [Figure 1] This is a diagram showing an example configuration of a wireless communication system (1). [Figure 2] This is a diagram showing an example configuration of a wireless communication system (2). [Figure 3] This figure shows an example (1) of the configuration of a virtual CC according to an embodiment of the present invention. [Figure 4] This figure shows an example (2) of the configuration of a virtual CC according to an embodiment of the present invention. [Figure 5] This figure shows an example of a Type 1 HARQ-ACK codebook. [Figure 6] This figure shows an example of a Type 2 HARQ-ACK codebook. [Figure 7] This figure shows an example of the PUCCH group. [Figure 8] This figure shows an example (1) of a PUCCH cell in an embodiment of the present invention. [Figure 9] This figure shows an example (2) of a PUCCH cell in an embodiment of the present invention. [Figure 10] This figure shows an example (3) of a PUCCH cell in an embodiment of the present invention. [Figure 11] This figure shows an example (4) of a PUCCH cell in an embodiment of the present invention. [Figure 12] This figure shows an example (1) of the HARQ-ACK feedback timing in an embodiment of the present invention. [Figure 13] This figure shows an example (2) of the HARQ-ACK feedback timing in an embodiment of the present invention. [Figure 14] This figure shows an example (1) of a Type 1 HARQ-ACK codebook in an embodiment of the present invention. [Figure 15] This figure shows an example (2) of a Type 1 HARQ-ACK codebook in an embodiment of the present invention. [Figure 16] This figure shows an example (3) of a Type 1 HARQ-ACK codebook in an embodiment of the present invention. [Figure 17] This figure shows an example (4) of a Type 1 HARQ-ACK codebook in an embodiment of the present invention. [Figure 18] This figure shows an example (5) of a Type 1 HARQ-ACK codebook in an embodiment of the present invention. [Figure 19] FIG. 1 is a diagram showing an example (1) of a Type 2 HARQ-ACK codebook in an embodiment of the present invention. [Figure 20] FIG. 2 is a diagram showing an example (2) of a Type 2 HARQ-ACK codebook in an embodiment of the present invention. [Figure 21] FIG. 3 is a diagram showing an example (3) of a Type 2 HARQ-ACK codebook in an embodiment of the present invention. [Figure 22] FIG. 4 is a diagram showing an example (4) of a Type 2 HARQ-ACK codebook in an embodiment of the present invention. [Figure 23] FIG. 5 is a diagram showing an example of the functional configuration of a base station 10 according to an embodiment of the present invention. [Figure 24] FIG. 6 is a diagram showing an example of the functional configuration of a terminal 20 according to an embodiment of the present invention. [Figure 25] FIG. 7 is a diagram showing an example of the hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention. [Figure 26] FIG. 8 is a diagram showing an example of the configuration of a vehicle 2001 in an embodiment of the present invention.

Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the embodiments described below are examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.

[0011] In the operation of the wireless communication system according to the embodiment of the present invention, existing technologies are appropriately used. However, the existing technology is, for example, existing LTE, but is not limited to existing LTE. Further, the term "LTE" used in this specification shall have a broad meaning including LTE-Advanced and systems after LTE-Advanced (e.g., NR) unless otherwise specified.

[0012] Furthermore, in the embodiments of the present invention described below, terms such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel), which are used in existing LTE systems, will be used. This is for convenience of description, and similar signals, functions, etc., may be called by other names. Also, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even if a signal is used in NR, it is not necessarily explicitly stated as "NR-".

[0013] Furthermore, in the embodiments of the present invention, the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or any other method (for example, a Flexible Duplex).

[0014] Furthermore, in the embodiments of the present invention, "configuring" wireless parameters may mean that predetermined values ​​are pre-configured, or that wireless parameters notified from the base station 10 or terminal 20 are configured.

[0015] Figure 1 shows an example configuration (1) of a wireless communication system according to an embodiment of the present invention. The wireless communication system according to an embodiment of the present invention includes a base station 10 and a terminal 20, as shown in Figure 1. Figure 1 shows one base station 10 and one terminal 20, but this is an example, and there may be multiple base stations 10 and terminals 20.

[0016] Base station 10 is a communication device that provides one or more cells and communicates wirelessly with terminal 20. The physical resources of the radio signal are defined in the time domain and the frequency domain. The time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or resource blocks. Base station 10 transmits synchronization signals and system information to terminal 20. Synchronization signals are, for example, NR-PSS and NR-SSS. System information is transmitted, for example, in NR-PBCH and is also called broadcast information. Synchronization signals and system information may be called SSB (SS / PBCH block). As shown in Figure 1, base station 10 transmits control signals or data to terminal 20 via DL (Downlink) and receives control signals or data from terminal 20 via UL (Uplink). Both base station 10 and terminal 20 are capable of transmitting and receiving signals using beamforming. Furthermore, both base station 10 and terminal 20 are capable of applying MIMO (Multiple Input Multiple Output) communication to DL or UL. Furthermore, both the base station 10 and the terminal 20 may communicate via secondary cells (SCell) and primary cells (PCell) using Carrier Aggregation (CA). In addition, the terminal 20 may communicate via the primary cell of base station 10 and the primary secondary cell group cell (PSCell) of another base station 10 using Dual Connectivity (DC).

[0017] Terminal 20 is a communication device equipped with wireless communication capabilities, such as a smartphone, mobile phone, tablet, wearable device, or M2M (Machine-to-Machine) communication module. As shown in Figure 1, Terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. Terminal 20 also receives various reference signals transmitted from the base station 10 and performs propagation path quality measurements based on the reception results of these reference signals.

[0018] Terminal 20 is capable of performing carrier aggregation, which involves bundling multiple cells (multiple CCs (Component Carriers)) together to communicate with base station 10. Carrier aggregation uses one PCell (Primary cell) and one or more SCells (Secondary cells). In addition, a PUCCH-SCell with a PUCCH may be used.

[0019] Figure 2 shows an example (2) of a wireless communication system according to an embodiment of the present invention. Figure 2 shows an example of the configuration of a wireless communication system when DC (Dual connectivity) is performed. As shown in Figure 2, a base station 10A that will be an MN (Master Node) and a base station 10B that will be an SN (Secondary Node) are provided. Base stations 10A and 10B are each connected to the core network. Terminal 20 can communicate with both base station 10A and base station 10B.

[0020] A cell group provided by base station 10A, which is the MN (Mobile Network Unit), is called an MCG (Master Cell Group), and a cell group provided by base station 10B, which is the SN (Stationary Network Unit), is called an SCG (Secondary Cell Group). In a data center, an MCG consists of one PCell and one or more SCells, and an SCG consists of one PSCell (Primary SCG Cell) and one or more SCells.

[0021] The processing operations in this embodiment may be performed using the system configuration shown in Figure 1, the system configuration shown in Figure 2, or any other system configuration.

[0022] Furthermore, LTE and NR support carrier aggregation, a feature that uses broadband to secure data resources. Carrier aggregation allows for the securing of broadband data resources by bundling multiple component carriers. For example, by bundling multiple 20MHz bandwidths, a 100MHz bandwidth can be used.

[0023] Traditional carrier aggregation functions require scheduling data resources for each of the bundled component carriers, resulting in significant resource allocation overhead.

[0024] Therefore, this document describes a method for allocating resources using scheduling units with a different granularity than component carriers, and a terminal that performs resource allocation using scheduling units with a different granularity than component carriers.

[0025] A framework that performs scheduling or aggregation at a different granularity than component carriers is defined as frequency fragmentation.

[0026] Furthermore, in carrier aggregation, performing aggregation (aggregation) at a different granularity than that of component carriers is defined as discontinuous carrier aggregation.

[0027] Furthermore, in carrier aggregation (discontinuous carrier aggregation), discontinuous scheduling is defined as scheduling at a different granularity than that of the component carriers.

[0028] The granularity different from the component carriers mentioned above may be in units of virtual CC (virtual CC), BWP (Bandwidth Part), PRB (Physical Resource Block), or PRB set.

[0029] Here, a virtual CC is a carrier set that bundles all or part of the frequency resources contained in each of several component carriers.

[0030] For example, a virtual CC can be assumed to be composed of multiple BWPs.

[0031] Figure 3 shows an example (1) of the configuration of a virtual CC according to an embodiment of the present invention. The virtual CC#i shown in Figure 3 is a carrier set formed by bundling BWP#a and BWP#b contained in each component carrier among a plurality of component carriers (CC#0 and CC#1). Hereinafter, CC#0 and CC#1 will be referred to as the actual CC.

[0032] Furthermore, it may be assumed that the virtual CC consists of multiple PRBs or sets of PRBs.

[0033] Figure 4 shows an example (2) of the configuration of a virtual CC according to an embodiment of the present invention. The virtual CC#i shown in Figure 4 is a carrier set that bundles multiple PRBs contained in each component carrier from among multiple component carriers (CC#0 and CC#1). Note that these multiple PRBs or PRB sets may be contained in one or more BWPs.

[0034] Terminal 20 may transmit terminal capability information indicating the configuration of the virtual CC to base station 10. The terminal capability information indicating the configuration of the virtual CC may, for example, be information indicating that the virtual CC is composed of multiple BWPs, or information indicating that the virtual CC is composed of multiple PRBs.

[0035] Furthermore, terminal capability information indicating the configuration of a virtual CC may also be information indicating support for a virtual CC composed of multiple BWPs and a virtual CC composed of multiple PRBs.

[0036] Terminal 20 may also assume that an index for identifying each virtual CC is set by the base station 10 in RRC. Terminal 20 may also assume that the index for identifying each virtual CC is the minimum value (e.g., i=0 in Figure 3 or Figure 4) or maximum value (e.g., i=1 in Figure 3 or Figure 4) of the component carrier index.

[0037] Terminal 20 may assume that the scheduling unit in discontinuous scheduling is notified by (i) a virtual CC index, (ii) an index of multiple component carriers + an index of multiple BWPs, (iii) an index of multiple component carriers + an index of multiple PRBs or PRB sets, (iv) an index of multiple component carriers + an index of multiple BWPs + an index of multiple PRBs or PRB sets, etc.

[0038] Furthermore, terminal 20 may assume that the resource unit of carrier aggregation is a virtual CC, BWP, PRB, or PRB set.

[0039] The operation described above makes it possible to achieve resource allocation at a scheduling unit with a different granularity than the component carrier.

[0040] However, the behavior of HARQ-ACK feedback when a virtual CC with discontinuous frequency domains is introduced was not specified.

[0041] Therefore, when a virtual CC is introduced, the operation related to HARQ-ACK feedback may be carried out as described below, including the determination of the PUCCH cell, the determination of the HARQ-ACK feedback timing, and the construction of the HARQ-ACK codebook in the virtual CC.

[0042] In the embodiments of the present invention, PUCCH is merely an example and may be any physical channel that transmits UL control information UCI, and may be replaced with PUSCH. Furthermore, UL control information may be at least one of SR, HARQ-ACK, and CSI, or may include other information. Note that HARQ-ACK feedback may be replaced with SR or CSI. The type of HARQ-ACK codebook may be different from the types described below, or may be replaced with existing types.

[0043] Figure 5 shows an example of a Type 1 HARQ-ACK codebook. The HARQ-ACK bits are transmitted in a single PUCCH resource. These bits are called the HARQ-ACK codebook. One of two types is set by the RRC parameter pdsch-HARQ-ACK-Codebook (see Non-Patent Literature 3).

[0044] Figure 5 shows an example of a semi-static codebook, a Type 1 HARQ-ACK codebook. The HARQ-ACK bits correspond to PDSCH reception that may actually be transmitted. In the example in Figure 5, the RRC parameter dl-DataToUL-ACK (see Non-Patent Literature 3) sets the K1 value, which is the slot offset between PDSCH and PUSCH, to two types: 2 and 3.

[0045] The time domain resource allocation is determined by the RRC parameter pdsch-TimeDomainAllocationList (see Non-Patent Document 3) as shown in Figure 5. As shown in Figure 5, a HARQ-ACK codebook containing HARQ-ACK bits is constructed for each of "A", "B", and "C". Note that "A" corresponds to two cases as shown in Figure 5: one in which PDSCH is placed from symbol #2 to symbol #14, and another in which PDSCH is placed from symbol #0 to symbol #6, and these cases are mutually exclusive.

[0046] Figure 6 shows an example of a Type 2 HARQ-ACK codebook. Figure 6 illustrates an example of a dynamic Type 2 HARQ-ACK codebook. The HARQ-ACK bits correspond to the PDSCH reception that is presumed to be actually transmitted.

[0047] The Downlink Assignment Index (DAI) can be used to estimate PDSCH reception. The Counter DAI (C-DAI) indicates the number of PDSCH assignments up to the current PDSCH. The Total DAI (T-DAI) indicates the number of PDSCH assignments up to the current slot. The DAI is calculated using the remainder of 4.

[0048] For example, if decoding of the DCI "A" shown in Figure 5 fails, the (C-DAI, T-DAI) of the preceding and following DCIs are (3,1) and (1,1), so it can be determined that a DCI with (0,1) is missing, and a NACK can be reported with the corresponding HARQ-ACK bit.

[0049] Figure 7 shows an example of a PUCCH group. PUCCH transmissions for PUCCH groups targeting multiple CCs are supported in FR1 and FR2. Up to four different SCSs are supported within the same PUCCH group, depending on UE capability. Up to two PUCCH groups are supported, depending on UE capability. In the example in Figure 7, a primary PUCCH group is configured from CC#x1 to CC#m, and a secondary PUCCH group is configured from CC#y1 to CC#n.

[0050] The cells of PUCCH that send HARQ-ACK feedback may be determined as follows:

[0051] Terminal 20 may transmit PUCCH with a single actual CC included in the virtual CC. Figure 8 shows an example (1) of a PUCCH cell in an embodiment of the present invention. As shown in Figure 8, all SCSs of the actual CCs constituting the virtual CC may be the same. In the example in Figure 8, all PUCCHs are transmitted with actual CC#0. As shown in Figure 8, all PUCCHs may be transmitted with the same actual CC.

[0052] Figure 9 shows an example (2) of a PUCCH cell in an embodiment of the present invention. As shown in Figure 9, the SCS of the actual CCs constituting the virtual CC may be different. In the example in Figure 9, PUCCH is transmitted with actual CC#0 or actual CC#1. Also, as shown in Figure 9, all PUCCHs may be transmitted with the same actual CC.

[0053] Figure 10 shows an example (3) of a PUCCH cell in an embodiment of the present invention. As shown in Figure 10, PUCCH may be transmitted across multiple actual CCs included in a virtual CC. For example, virtual CC#0 shown in Figure 10 transmits PUCCH in actual CC#0 and actual CC#1, and virtual CC#1 shown in Figure 10 transmits PUCCH in actual CC#2 and actual CC#3. A constraint on the frequency resource of PUCCH may be defined for each actual CC. For example, for each actual CC, the frequency resource of PUCCH may be defined as being at least X for the number of RBs or at least X for the number of REs.

[0054] As shown in Figure 10 for virtual CC#0, the SCS of all actual CCs constituting the virtual CC may be the same. As shown in Figure 11 for virtual CC#1, the SCS of the actual CCs constituting the virtual CC may be different. Furthermore, the time resources used to transmit PUCCH may be the same or different in absolute time among the actual CCs. Also, the number of symbols used to transmit PUCCH may be the same or different among the actual CCs.

[0055] As shown in Figure 10, when sending a PUCCH across multiple actual CCs included in a virtual CC, the PUCCH format may be determined as shown in 1) or 2) below.

[0056] 1) When sending PUCCH across multiple actual CCs, the PUCCH format based on sequence selection, such as format 0 or format 1 of the existing specifications, does not need to be supported.

[0057] 2) When sending a PUCCH across multiple actual CCs, the PUCCH format may be determined according to the size of the payload being sent.

[0058] As shown in Figure 10, when sending a PUCCH across multiple actual CCs included in a virtual CC, the number of RBs may be determined as shown in 1) or 2) below.

[0059] 1) The number of RBs may be determined according to the size of the payload to be transmitted, the modulation order, the coding rate, and the number of symbols, and whether or not to transmit PUCCH across multiple actual CCs may be determined according to the determined number of RBs.

[0060] 2) If a lower limit on the number of RBs is set for each actual CC, the number of transmitted RBs for each actual CC may be determined based on that lower limit.

[0061] Figure 11 shows an example (4) of a PUCCH cell in an embodiment of the present invention. As shown in Figure 11, a PUCCH group including multiple virtual CCs may be configured, and the HARQ-ACK feedback of PDSCHs scheduled to the multiple virtual CCs may be aggregated and transmitted by a PUCCH in a single virtual CC. In the example in Figure 11, the HARQ-ACK feedback of PDSCHs scheduled to virtual CC#0 and virtual CC#1 is transmitted by a PUCCH in virtual CC#1.

[0062] For virtual CCs included in a PUCCH group, each virtual CC may have the same SCS, while different SCSs may be used between virtual CCs. Furthermore, for actual CCs included in virtual CCs within a PUCCH group, the SCSs may be identical or different between the actual CCs. Depending on the UE capability, the SCSs between supported CCs may differ, and UE capability signaling that reports whether the SCSs between supported CCs are identical may be defined.

[0063] Figure 12 shows an example (1) of the HARQ-ACK feedback timing in an embodiment of the present invention. Figure 13 shows an example (2) of the HARQ-ACK feedback timing in an embodiment of the present invention. As shown in Figures 12 and 13, the interval K1 between PDSCH reception and PUCCH transmission of HARQ-ACK may be defined. The unit of K1 may be a symbol, slot, slot group, or millisecond. Note that a PDSCH resource may be allocated to a single actual CC, or a single PDSCH resource may be allocated across multiple actual CCs. Furthermore, when configured across multiple actual CCs, the TDRA (Time Domain Resource Allocation) of the PDSCH may be the same or different among the actual CCs.

[0064] K1 may be any of the following options 1)-6). K1 in options 1)-4) shown in Figures 12 and 13 corresponds to the following description.

[0065] Option 1) The interval between a PDSCH (slot or symbol) and a PUCCH (slot or symbol) in an actual CC or virtual CC that receives a PDSCH. This interval may be measured by the number of slots or symbols in the CC with the largest or smallest SCS among several actual CCs to which the PDSCH is assigned.

[0066] Option 2) The interval between a PDSCH (slot or symbol) and a PUCCH (slot or symbol) in the actual CC or virtual CC that transmits the PUCCH. This interval may be measured by the number of slots or symbols in the CC with the largest or smallest SCS among the multiple actual CCs to which the PUCCH is assigned.

[0067] Option 3) The distance between the beginning of PDSCH (slot or symbol) and PUCCH (slot or symbol).

[0068] Option 4) The interval between the end of PDSCH (slot or symbol) and PUCCH (slot or symbol).

[0069] Option 5) The interval between PDSCH (slot or symbol) and PUCCH (slot or symbol) in the actual CC or virtual CC that receives PDCCH.

[0070] Option 6) The interval between a PDSCH (slot or symbol) and a PUCCH (slot or symbol) in an actual CC or virtual CC that has the minimum or maximum CC index, among the actual CCs that are transmitted via PDCCH, PDSCH, or PUCCH.

[0071] The above options may be combined in multiple ways. Furthermore, the time resources used to send PUCCH may have the same or different absolute time between actual CCs, and the number of symbols may or may not be the same.

[0072] The HARQ-ACK codebook may be specified as shown in 1)-3) below.

[0073] 1) The number of codewords scheduled in a single DCI may be set per virtual CC or per actual CC.

[0074] 2) Spatial bundling may be set for each virtual CC or for each actual CC.

[0075] 3) For CBG (Code Block Group) based transmission, it may be set for each virtual CC or for each actual CC.

[0076] For a Type 1 HARQ-ACK codebook, the order in which codebooks are constructed for PDSCHs with the same PDSCH candidate occasion may be any of the following. Note that a PDSCH candidate occasion may be a symbol, slot, or slot group that can be set as the beginning or end of a PDSCH.

[0077] Figure 14 shows an example (1) of a Type 1 HARQ-ACK codebook in an embodiment of the present invention. As shown in Figure 14, the generation order of HARQ-ACK bits may be from CCs with small to large actual CC indices, and further, among the PDSCHs of the actual CCs, from CCs with small to large virtual CC indices. That is, the DAI may be counted with the index of the actual CC as the first priority and the index of the virtual CC as the second priority. The example in Figure 14 assumes a case where one actual CC is included in multiple virtual CCs.

[0078] Figure 15 shows an example (2) of a Type 1 HARQ-ACK codebook in an embodiment of the present invention. As shown in Figure 15, the generation order of HARQ-ACK bits may be from smallest to largest virtual CC indices, and further, among the PDSCHs of the virtual CCs, from smallest to largest actual CC indices. That is, the DAI may be counted with the virtual CC index as the first priority and the actual CC index as the second priority. The example in Figure 15 assumes a case where multiple actual CCs are included in a single virtual CC.

[0079] Figure 16 shows an example (3) of a Type 1 HARQ-ACK codebook in an embodiment of the present invention. As shown in Figure 16, the generation order of HARQ-ACK bits may be from CCs with small virtual CC indices to CCs with large virtual CC indices. For PDSCH reception candidates, the codebook may be generated assuming that PDSCHs with different actual CCs can be received simultaneously.

[0080] Figure 17 shows an example (4) of a Type 1 HARQ-ACK codebook in an embodiment of the present invention. Figure 17 is an example of a Type 1 HARQ-ACK codebook constructed in the order of the virtual CC index shown in Figure 15, followed by the actual CC index. As shown in Figure 17, the Type 1 HARQ-ACK codebook is constructed in the order of actual CC#0 PDSCH#1, actual CC#2 PDSCH#2, actual CC#1 PDSCH#3, actual CC#3 PDSCH#4, actual CC#0 PDSCH#5, actual CC#2 PDSCH#6, actual CC#1 PDSCH#7, and actual CC#3 PDSCH#8.

[0081] Figure 18 shows an example (5) of a Type 1 HARQ-ACK codebook in an embodiment of the present invention. Figure 18 is an example of a Type 1 HARQ-ACK codebook constructed in the order of the actual CC index and the virtual CC index shown in Figure 14. As shown in Figure 14, the Type 1 HARQ-ACK codebook is constructed in the order of actual CC#0 PDSCH#1, actual CC#1 PDSCH#2, actual CC#2 PDSCH#3, actual CC#3 PDSCH#4, actual CC#0 PDSCH#5, actual CC#2 PDSCH#6, actual CC#1 PDSCH#7, actual CC#3 PDSCH#8.

[0082] For Type 2 HARQ-ACK codebooks, DAI counting may be performed as shown in 1) or 2) below.

[0083] 1) You may count DAI in a DCI. If a DCI scheduling one PDSCH has resources allocated across multiple actual CCs, you may count DAI as one DCI for each actual CC, or you may count DAI as one DCI.

[0084] 2) DAI may be counted in PDSCH. If a single PDSCH has resources allocated across multiple actual CCs, DAI may be counted as one DCI for each actual CC, or as one DCI for each DCI.

[0085] A Type 2 HARQ-ACK codebook may be constructed as in Option A) or Option B).

[0086] Option A) A subcodebook may be constructed for each virtual CC and then concatenated.

[0087] Option B) Codebooks may be built collectively across virtual CCs. Furthermore, DAI counting may be performed as shown in 1) or 2) below.

[0088] 1) The generation order of HARQ-ACK bits may be set from the smallest to the largest index of the actual CCs, and further, from the smallest to the largest index of the virtual CCs among the DCI or PDSCH of the actual CCs. In other words, the DAI may be counted with the index of the actual CCs as the first priority and the index of the virtual CCs as the second priority. Assume that one actual CC is included in multiple virtual CCs.

[0089] 2) The generation order of the HARQ-ACK bits may be set from the smallest to the largest index of the virtual CCs, and further, among the DCI or PDSCH of the virtual CCs, from the smallest to the largest index of the actual CCs. In other words, the DAI may be counted with the virtual CC index as the first priority and the actual CC index as the second priority. This assumes a case where multiple actual CCs are included in a single virtual CC.

[0090] Regarding the ACK / NACK bits of HARQ-ACK, if a single PDSCH is scheduled across multiple actual CCs, the ACK / NACK bits may be aggregated, or different ACK / NACK bits may be provided for each actual CC.

[0091] Figure 19 shows an example (1) of a Type 2 HARQ-ACK codebook in an embodiment of the present invention. Figure 19 shows an example of codebook construction of option A) above, and an example in which the PDSCH is scheduled to be confined to a single actual CC. Figure 19 also shows an example of counting DAI against DCI.

[0092] As shown in Figure 19, the ACK / NACK bits of the 1st subcodebook for virtual CC#0 are (C-DAI, T-DAI) in the order of (0,1) for actual CC#0, (1,1) for actual CC#2, (2,3) for actual CC#0, and (3,3) for actual CC#2.

[0093] As shown in Figure 19, the ACK / NACK bits of the 2nd subcodebook for virtual CC#1 are (C-DAI, T-DAI) in the order of (0,1) for actual CC#1, (1,1) for actual CC#3, (2,3) for actual CC#1, and (3,3) for actual CC#3.

[0094] Figure 20 shows an example (2) of a Type 2 HARQ-ACK codebook in an embodiment of the present invention. Figure 20 shows an example of codebook construction of option B) above, and an example in which a PDSCH is scheduled across multiple actual CCs. Figure 20 also shows an example of counting DAI for DCI. Figure 20 also shows an example of aggregating the ACK / NACK bits of a PDSCH scheduled across multiple actual CCs. Figure 20 also shows an example of counting DAI for each index of a virtual CC.

[0095] As shown in Figure 20, the ACK / NACK bits in the codebook are (C-DAI, T-DAI) in the following order: (0,1) for actual CC#0 and actual CC#2, (1,1) for actual CC#1 and actual CC#3, (2,3) for actual CC#0 and actual CC#2, and (3,3) for actual CC#1 and actual CC#3.

[0096] Figure 21 shows an example (3) of a Type 2 HARQ-ACK codebook in an embodiment of the present invention. Figure 21 shows an example of codebook construction of option B) above, and an example in which the PDSCH is scheduled to be confined to a single actual CC. Figure 21 also shows an example of counting DAI against DCI. Figure 21 also shows an example of counting DAI with virtual CC index as the first priority and actual CC index as the second priority.

[0097] As shown in Figure 21, the ACK / NACK bits (C-DAI, T-DAI) are in the following order: (0,3) for actual CC#0, (1,3) for actual CC#2, (2,3) for actual CC#1, (3,3) for actual CC#3, (0,1) for actual CC#0, (1,1) for actual CC#2, (2,3) for actual CC#1, and (3,3) for actual CC#3.

[0098] Figure 22 shows an example (4) of a Type 2 HARQ-ACK codebook in an embodiment of the present invention. Figure 22 shows an example of codebook construction of option B) above, and an example in which a PDSCH is scheduled across multiple actual CCs. Figure 22 also shows an example of counting DAI for a PDSCH. Furthermore, Figure 22 shows an example of counting DAI with the index of the actual CC as the first priority and the index of the virtual CC as the second priority.

[0099] As shown in Figure 21, the ACK / NACK bits (C-DAI, T-DAI) are in the following order: (0,3) for actual CC#0, (1,3) for actual CC#1, (2,3) for actual CC#2, (3,3) for actual CC#3, (0,1) for actual CC#0, (1,1) for actual CC#2, (2,3) for actual CC#1, and (3,3) for actual CC#3.

[0100] In the embodiment described above, the base station 10 and terminal 20 can determine the timing for transmitting a PUCCH and the HARQ-ACK codebook when a virtual CC with a discontinuous frequency domain is introduced, and perform HARQ-ACK feedback.

[0101] In other words, in a wireless communication system, feedback operations related to retransmission control can be performed in a wide bandwidth where the frequency domain is discontinuous.

[0102] (Device configuration) Next, we will describe an example of the functional configuration of the base station 10 and terminal 20 that perform the processes and operations described above. The base station 10 and terminal 20 include functions to implement the embodiments described above. However, the base station 10 and terminal 20 may each have only some of the functions in the embodiments.

[0103] <Base station 10> Figure 23 is a diagram showing an example of the functional configuration of a base station 10 in an embodiment of the present invention. As shown in Figure 23, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Figure 23 is merely an example. The names of the functional categories and functional units can be anything as long as they can perform the operations according to the embodiment of the present invention.

[0104] The transmitting unit 110 includes the function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The transmitting unit 110 also transmits inter-network node messages to other network nodes. The receiving unit 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining information from the received signals, for example, higher layer information. The transmitting unit 110 also has the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, etc. to the terminal 20. The receiving unit 120 also receives inter-network node messages from other network nodes.

[0105] The setting unit 130 stores pre-configured setting information and various setting information to be transmitted to the terminal 20. The content of the setting information includes, for example, information related to multi-carrier scheduling.

[0106] The control unit 140 performs control related to multi-carrier scheduling, as described in the embodiment. The signal transmission function in the control unit 140 may be included in the transmission unit 110, and the signal reception function in the control unit 140 may be included in the reception unit 120.

[0107] <Terminal 20> Figure 24 is a diagram showing an example of the functional configuration of terminal 20 in an embodiment of the present invention. As shown in Figure 24, terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Figure 24 is merely an example. Any functional classification and functional unit names are acceptable as long as they can perform the operations according to the embodiment of the present invention.

[0108] The transmitting unit 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 wirelessly receives various signals and acquires signals from higher layers from the received physical layer signals. The receiving unit 220 also has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, etc. transmitted from the base station 10. For example, the transmitting unit 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc. to other terminals 20 as D2D communication, and the receiving unit 220 receives PSCCH, PSSCH, PSDCH or PSBCH, etc. from other terminals 20.

[0109] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220. The setting unit 230 also stores pre-configured setting information. The content of the setting information includes, for example, information related to multi-carrier scheduling.

[0110] The control unit 240 performs control related to multi-carrier scheduling, as described in the embodiment. The signal transmission function in the control unit 240 may be included in the transmission unit 210, and the signal reception function in the control unit 240 may be included in the reception unit 220.

[0111] (Hardware configuration) The block diagrams (Figures 23 and 24) used in the description of the above embodiments show functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may be realized by combining the one or more devices with software.

[0112] Functions include, but are not limited to, judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, assumption, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission is called a transmitting unit or transmitter. As mentioned above, the method of implementation is not particularly limited.

[0113] For example, the base station 10, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 25 is a diagram showing an example of the hardware configuration of the base station 10 and terminal 20 according to one embodiment of the present disclosure. The above-mentioned base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0114] In the following explanation, the term "device" can be read as "circuit," "device," "unit," etc. The hardware configuration of the base station 10 and terminal 20 may include one or more of the devices shown in the figure, or it may be configured without some of the devices.

[0115] Each function in the base station 10 and terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and storage device 1002, which allows the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of the reading and writing of data in the storage device 1002 and auxiliary storage device 1003.

[0116] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may consist of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc. For example, the control unit 140, control unit 240, etc., described above may be implemented by the processor 1001.

[0117] Furthermore, the processor 1001 reads programs (program code), software modules, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes accordingly. The program used is one that causes a computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 140 of the base station 10 shown in Figure 23 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Also, for example, the control unit 240 of the terminal 20 shown in Figure 24 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunications line.

[0118] The storage device 1002 is a computer-readable recording medium and may consist of at least one of the following: ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may also be called a register, cache, main memory, etc. The storage device 1002 can store executable programs (program code), software modules, etc., for implementing a communication method according to one embodiment of this disclosure.

[0119] The auxiliary storage device 1003 is a computer-readable recording medium and may consist of at least one of the following: an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disc, a digital multipurpose disc, a Blu-ray® disc), a smart card, flash memory (e.g., a card, a stick, a key drive), a floppy® disk, a magnetic strip, etc. The above-mentioned storage medium may also be a database, server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0120] The communication device 1004 is hardware (transceiver / receiver device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may include high-frequency switches, duplexers, filters, frequency synthesizers, etc., to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the transmit / receive antenna, amplifier section, transmit / receive section, transmission path interface, etc., may be implemented by the communication device 1004. The transmit / receive section may be implemented with physically or logically separated transmitting and receiving sections.

[0121] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, LED lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0122] Furthermore, each device, such as the processor 1001 and the storage device 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0123] Furthermore, the base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and some or all of each functional block may be realized by such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0124] Figure 26 shows an example of the configuration of vehicle 2001. As shown in Figure 26, vehicle 2001 comprises a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in this disclosure may be applied to a communication device mounted on vehicle 2001, for example, to the communication module 2013.

[0125] The drive unit 2002 consists of, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel, which is operated by the user.

[0126] The electronic control unit 2010 consists of a microprocessor 2031, memory (ROM, RAM) 2032, and communication ports (IO ports) 2033. Signals from various sensors 2021 to 2029 installed in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0127] Signals from various sensors 2021-2029 include current signals from current sensor 2021 which senses motor current, front and rear wheel rotation speed signals obtained by rotation speed sensor 2022, front and rear wheel air pressure signals obtained by air pressure sensor 2023, vehicle speed signals obtained by vehicle speed sensor 2024, acceleration signals obtained by acceleration sensor 2025, accelerator pedal depression signals obtained by accelerator pedal sensor 2029, brake pedal depression signals obtained by brake pedal sensor 2026, shift lever operation signals obtained by shift lever sensor 2027, and detection signals obtained by object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0128] The Information Services Unit 2012 consists of various devices for providing (outputting) various types of information such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, television, and radio, and one or more ECUs that control these devices. The Information Services Unit 2012 uses information acquired from external devices via a communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001. The Information Services Unit 2012 may include input devices that accept input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) and output devices that perform output to the outside (e.g., display, speaker, LED lamp, touch panel, etc.).

[0129] The driver assistance system unit 2030 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 2030 also sends and receives various information via the communication module 2013 to realize driver assistance functions or autonomous driving functions.

[0130] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via its communication port. For example, the communication module 2013 sends and receives data via its communication port 2033 to the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, the microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021-29 provided in the vehicle 2001.

[0131] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station or a mobile station.

[0132] The communication module 2013 may transmit at least one of the following to an external device via wireless communication: signals from the various sensors 2021-2028 input to the electronic control unit 2010, information obtained based on said signals, and information based on input from an external source (user) obtained via the information service unit 2012. The electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc., may also be called input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above input.

[0133] The communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device and displays it on the information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may also be called an output unit, which outputs information (for example, outputs information to devices such as displays and speakers based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 2013). The communication module 2013 also stores the various information received from the external device in memory 2032, which is available to the microprocessor 2031. Based on the information stored in memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021-2029, etc., provided in the vehicle 2001.

[0134] (Summary of the embodiments) As described above, according to an embodiment of the present invention, a terminal is provided which includes a receiving unit that receives a downlink sharing channel from a base station in a virtual CC that is discontinuous in the frequency domain including multiple actual CCs (Component Carriers), a control unit that determines feedback information related to retransmission control corresponding to the downlink sharing channel, and a transmitting unit that transmits an uplink control channel including the feedback information to the base station in the virtual CC, wherein the control unit constructs a codebook of the feedback information in the order that it prioritizes either the virtual CC or the actual CC, and then the remaining CCs.

[0135] With the above configuration, when a virtual CC with a discontinuous frequency domain is introduced, the base station 10 and terminal 20 can determine the timing for transmitting a PUCCH and the HARQ-ACK codebook, and perform HARQ-ACK feedback. In other words, in a wireless communication system, feedback operations related to retransmission control can be performed in a wideband area where the frequency domain is discontinuous.

[0136] The control unit may construct the codebook by constructing and linking subcodebooks for each virtual CC. With this configuration, the base station 10 and terminal 20 can determine the timing for transmitting PUCCH and the HARQ-ACK codebook when a virtual CC with a discontinuous frequency domain is introduced, and perform HARQ-ACK feedback.

[0137] The control unit may construct the codebook collectively across the virtual CCs. With this configuration, when a virtual CC with discontinuous frequency domains is introduced, the base station 10 and terminal 20 can determine the timing for transmitting a PUCCH and the HARQ-ACK codebook, and perform HARQ-ACK feedback.

[0138] The control unit may aggregate feedback information related to retransmission control corresponding to downlink sharing channels scheduled across multiple actual CCs. With this configuration, the base station 10 and terminal 20 can determine the timing for transmitting a PUCCH and the HARQ-ACK codebook when a virtual CC with discontinuous frequency domains is introduced, and perform HARQ-ACK feedback.

[0139] The control unit may generate feedback information for retransmission control corresponding to downlink sharing channels scheduled across multiple actual CCs, for each actual CC. With this configuration, when a virtual CC with discontinuous frequency domains is introduced, the base station 10 and terminal 20 can determine the timing for transmitting a PUCCH and the HARQ-ACK codebook, and perform HARQ-ACK feedback.

[0140] Furthermore, according to an embodiment of the present invention, a communication method is provided in which a terminal performs the following steps: a receiving procedure for receiving a downlink sharing channel from a base station in a virtual CC that is discontinuous in the frequency domain including multiple actual CCs (Component Carriers); a control procedure for determining feedback information related to retransmission control corresponding to the downlink sharing channel; a transmission procedure for transmitting an uplink control channel including the feedback information to the base station in the virtual CC; and a procedure for constructing a codebook of the feedback information in the order of prioritizing either the virtual CC or the actual CC, and then the remaining CC.

[0141] With the above configuration, when a virtual CC with a discontinuous frequency domain is introduced, the base station 10 and terminal 20 can determine the timing for transmitting a PUCCH and the HARQ-ACK codebook, and perform HARQ-ACK feedback. In other words, in a wireless communication system, feedback operations related to retransmission control can be performed in a wideband area where the frequency domain is discontinuous.

[0142] (Supplement to the embodiment) While embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, substitutions, etc. Specific numerical examples have been used to facilitate understanding of the invention, but unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention, and matters described in two or more items may be combined as needed, and matters described in one item may be applied to matters described in another item (as long as they do not contradict each other). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operation of multiple functional units may be physically performed by one part, or the operation of one functional unit may be physically performed by multiple parts. Regarding the processing procedures described in the embodiments, the order of processing may be changed as long as it does not contradict each other. For the convenience of explaining the processing, the base station 10 and terminal 20 have been described using functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to an embodiment of the present invention and the software operated by the processor of the terminal 20 according to an embodiment of the present invention may be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

[0143] Furthermore, the notification of information is not limited to the embodiments / models described herein and may be carried out by other methods. For example, the notification of information may be carried out by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or combinations thereof. Also, RRC signaling may be called RRC messages, and may be, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc.

[0144] Each aspect / embodiment described in this disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (where x is, for example, an integer or decimal)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), and IEEE This may apply to at least one system utilizing 802.20, UWB (Ultra-WideBand), Bluetooth®, or other appropriate systems, and to next-generation systems extended, modified, created, or defined based thereon. It may also apply to a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G).

[0145] The processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described herein may be reordered, provided they are consistent with each other. For example, the methods described herein present various step elements in an exemplary order and are not limited to that specific order.

[0146] In this specification, specific operations performed by the base station 10 may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having a base station 10, it is clear that various operations performed for communication with the terminal 20 can be performed by the base station 10 and at least one of the other network nodes (for example, an MME or S-GW, but not limited to these). Although the above example illustrates the case where there is one other network node besides the base station 10, the other network node may be a combination of multiple other network nodes (for example, an MME and an S-GW).

[0147] The information or signals described in this disclosure may be output from a higher layer (or lower layer) to a lower layer (or higher layer). They may also be input and output via multiple network nodes.

[0148] Input and output information may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information may be overwritten, updated, or appended to. Output information may be deleted. Input information may be transmitted to other devices.

[0149] The determination in this disclosure may be made by a value represented by one bit (0 or 1), by a boolean value (true or false), or by a numerical comparison (for example, a comparison with a predetermined value).

[0150] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0151] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0152] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0153] In addition, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and symbol may be a signal (signaling). Also, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, cell, frequency carrier, etc.

[0154] The terms “system” and “network” as used in this disclosure are interchangeable.

[0155] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a given value, or other corresponding information. For example, wireless resources may be indicated by an index.

[0156] The names used for the parameters described above are not restrictive in any way. Furthermore, the formulas and other expressions using these parameters may differ from those expressly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0157] In this disclosure, terms such as "base station (BS)", "wireless base station", "base station equipment", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0158] A base station can house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station can be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a Remote Radio Head (RRH)). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0159] In this disclosure, the transmission of information by a base station to a terminal may be interpreted as the base station instructing the terminal to perform information-based control or operation.

[0160] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0161] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or several other appropriate terms.

[0162] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body refers to a movable object, and its speed of movement is arbitrary. This also includes the case when the mobile body is stationary. The mobile body includes, but is not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and items mounted on them. The mobile body may also be a mobile body that moves autonomously based on operation commands. It may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station may include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0163] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). In this case, the terminals 20 may have the functions that the base station 10 has. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, uplink channel, downlink channel, etc., may be interpreted as side channel.

[0164] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station may be configured to have the same functions as the user terminal described above.

[0165] As used in this disclosure, the terms “determining” and “determining” may encompass a wide variety of actions. “Determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry (e.g., searching in a table, database, or other data structure), and ascertaining. “Determining” may also include, for example, receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and accessing (e.g., accessing data in memory). Furthermore, "judgment" and "decision" can include considering something as having been "judged" or "decided" after resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment" and "decision" can include considering something as having been "judged" or "decided" after some action. Also, "judgment (decision)" can be reinterpreted as "assuming," "expecting," or "considering."

[0166] The terms “connected,” “coupled,” or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be reinterpreted as “access.” As used in this disclosure, two elements may be considered to be “connected” or “coupled” with each other using at least one of one or more wires, cables, and printed electrical connections, and, in some non-limiting and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0167] The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot depending on the applicable standard.

[0168] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0169] Any reference to elements using the designations “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, references to the first and second elements do not imply that only two elements may be employed, or that the first element must precede the second element in any way.

[0170] In the configuration of each of the above devices, "means" may be replaced with "part," "circuit," "device," etc.

[0171] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0172] A wireless frame may consist of one or more frames in the time domain. Each of these frames in the time domain may be called a subframe. A subframe may further consist of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0173] Numerical logic may be communication parameters applied to at least one of the transmission and reception of a signal or channel. Numerical logic may include, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processes performed by the transceiver in the frequency domain, and specific windowing processes performed by the transceiver in the time domain.

[0174] A slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.). A slot may also be a time unit based on neurology.

[0175] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. Minislots may also be called subslots. Minislots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0176] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Different names may be used for each of these terms.

[0177] For example, one subframe may be called a Transmission Time Interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one mini-slot may be called a TTI. In other words, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0178] Here, TTI refers to, for example, the smallest unit of time for scheduling in wireless communication. For example, in an LTE system, the base station schedules each terminal 20 to allocate wireless resources (such as the frequency bandwidth and transmission power available to each terminal 20) in TTI units. However, the definition of TTI is not limited to this.

[0179] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. Given a TTI, the actual time interval (e.g., number of symbols) to which the transport block, code block, code word, etc. are mapped may be shorter than the given TTI.

[0180] Furthermore, if one slot or one mini-slot is referred to as TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit of scheduling. In addition, the number of slots (number of mini-slots) that constitute the minimum time unit of scheduling may be controlled.

[0181] A TTI with a time length of 1ms may also be called a normal TTI, long TTI, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may also be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, mini slot, sub slot, slot, etc.

[0182] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0183] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0184] Furthermore, the time domain of RB may contain one or more symbols and may be the length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc., may each consist of one or more resource blocks.

[0185] One or more RBs may also be called a Physical RB (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0186] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0187] A Bandwidth Part (BWP), also known as a partial bandwidth, may represent a subset of consecutive common resource blocks (RBs) for a particular neurology system in a given carrier. These common RBs may be identified by an index of the RBs relative to a common reference point of the carrier. A Bandwidth Part (PRB) may be defined and numbered within a given BWP.

[0188] A BWP may include BWPs for UL (UL BWP) and BWPs for DL ​​(DL BWP). One or more BWPs may be configured within a single carrier for a UE.

[0189] At least one of the configured BWPs may be active, and the UE does not need to assume that it will send or receive a given signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0190] The structures described above, such as wireless frames, subframes, slots, minislots, and symbols, are merely illustrative. For example, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, and cyclic prefix (CP) length within a TTI can be varied in various ways.

[0191] In this disclosure, if articles are added through translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0192] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0193] Each aspect / embodiment described herein may be used individually, in combination, or switched between as needed during implementation. Furthermore, notification of specific information (e.g., notification that "X is") is not limited to explicit notification, but may also be implicit (e.g., by not providing such notification).

[0194] Although the present disclosure has been described in detail above, it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the intent and scope of the present disclosure as defined by the claims. Therefore, the descriptions in the present disclosure are illustrative and not intended to be restrictive in any way. [Explanation of Symbols]

[0195] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 devices 210 Transmitter 220 Receiver 230 Setting section 240 Control Unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Drive Unit 2003 Steering Department 2004 Accelerator pedal 2005 Brake pedal 2006 Shift Lever 2007 Front Wheel 2008 Rear wheel 2009 Axle 2010 Electronic Control Unit 2012 Information Services Department 2013 Communication Module 2021 Current Sensor 2022 Rotation speed sensor 2023 Pneumatic Sensor 2024 Vehicle Speed ​​Sensor 2025 Accelerometer 2026 Brake Pedal Sensor 2027 Shift lever sensor 2028 Object Detection Sensor 2029 Accelerator pedal sensor 2030 Driver Support Systems Department 2031 Microprocessor 2032 memory (ROM, RAM) 2033 Communication port (I / O port)

Claims

1. A receiving unit that receives a downlink sharing channel from a base station in a virtual CC that is discontinuous in the frequency domain, which includes multiple actual CCs (Component Carriers), A control unit that determines feedback information related to retransmission control corresponding to the downlink shared channel, The virtual CC includes a transmitting unit that transmits an uplink control channel containing the feedback information to the base station, The control unit constructs the codebook of the feedback information in the order that it prioritizes either the virtual CC or the actual CC, and then the remaining CCs. The control unit is a terminal that constructs the codebook by constructing and linking subcodebooks for each virtual CC.

2. A receiving unit that receives a downlink sharing channel from a base station in a virtual CC that is discontinuous in the frequency domain including multiple actual CCs (Component Carriers), A control unit that determines feedback information related to retransmission control corresponding to the downlink shared channel, The virtual CC includes a transmitting unit that transmits an uplink control channel containing the feedback information to the base station, The control unit constructs the codebook of the feedback information in the order that it prioritizes either the virtual CC or the actual CC, and then the remaining CCs. The control unit is a terminal that constructs the codebook collectively among the virtual CCs.

3. The terminal according to claim 2, wherein the control unit aggregates feedback information relating to retransmission control corresponding to downlink sharing channels scheduled across a plurality of actual CCs.

4. The terminal according to claim 2, wherein the control unit generates feedback information for retransmission control corresponding to downlink sharing channels scheduled across multiple actual CCs, for each actual CC.

5. A receiving procedure for receiving a downlink shared channel from a base station in a virtual CC that is discontinuous in the frequency domain containing multiple actual CCs (Component Carriers), and A control procedure for determining feedback information related to retransmission control corresponding to the downlink shared channel, A transmission procedure for transmitting an uplink control channel containing the feedback information to the base station in the virtual CC, The terminal performs the procedure of constructing the codebook of the feedback information in the order of prioritizing either the virtual CC or the actual CC, and then the remaining CCs, The control procedure is a communication method that constructs the codebook by constructing and linking subcodebooks for each virtual CC.

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