Terminal and communication method

Abstract

To increase uplink capacity in a wireless communication system.SOLUTION: A terminal includes a control unit that determines an OCC (Orthogonal Cover Code) to be applied to a repetition of a physical uplink shared channel modulated by DFT-s-OFDM (Discrete Fourier Transform spread Orthogonal Frequency Division Multiplexing) or OFDM, and a transmission unit that transmits the repetition of the physical uplink shared channel to which the OCC has been applied to a base station, and the control unit applies an OCC to be applied to a time domain and an OCC to be applied to a frequency domain, which are independently defined, to the repetition of the physical uplink shared channel.SELECTED DRAWING: Figure 9

Description

[Technical Field]

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

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

[0003] Currently, non-terrestrial networks (NTNs) are being considered. NTNs use non-terrestrial networks such as satellites to provide services to areas that cannot be covered by terrestrial 5G networks, mainly due to cost considerations (e.g., Non-Patent Documents 2 and 3). [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 38.300 V17.7.0 (2023-12) [Non-patent document 2] 3GPP TR 38.821 V16.2.0 (2023-03) [Non-patent document 3] Konishi et al., "A Study on Downlink Spectrum Sharing in HAPS Mobile Communication Systems," Institute of Electronics, Information and Communication Engineers General Conference, B-17-1, 2020 [Non-patent document 4] 3GPP TS 38.211 V17.6.0 (2023-09) Summary of the Invention [Problem to be solved by the invention]

[0005] In NTN, the distance between the base station and the terminal in the sky is very large and the base station resources are limited, so it is necessary to improve the capacity and throughput of the uplink (UL). Therefore, a method of applying the orthogonal cover code (OCC) to the physical uplink shared channel (PUSCH) of DFT-s-OFDM (discrete fourier transform spread orthogonal frequency division multiplexing) is being studied.

[0006] The present invention has been made in view of the above points, and has as its object to increase the uplink capacity in a wireless communication system. [Means for solving the problem]

[0007] According to the disclosed technique, there is provided a terminal including: a control unit that determines an orthogonal cover code (OCC) to be applied to a repetition of a physical uplink shared channel modulated by DFT-s-OFDM (Discrete fourier transform spread Orthogonal Frequency Division Multiplexing) or OFDM; and a transmission unit that transmits the repetition of the physical uplink shared channel to which the OCC has been applied to a base station, wherein the control unit applies an OCC to be applied to a time domain and an OCC to be applied to a frequency domain, which are independently defined, to the repetition of the physical uplink shared channel. [Effects of the Invention]

[0008] According to the disclosed technology, it is possible to increase the uplink capacity in a wireless communication system. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing an example of NTN (1). [Figure 2] FIG. 10 is a diagram showing an example (2) of NTN. [Figure 3] This is a diagram showing an example (3) of NTN. [Figure 4] This is a diagram showing an example (4) of NTN. [Figure 5] FIG. 1 is a diagram showing an example (1) of an OCC according to an embodiment of the present invention. [Figure 6] FIG. 10 is a diagram showing an example (2) of an OCC according to an embodiment of the present invention. [Figure 7] FIG. 10 is a diagram showing an example (3) of an OCC according to an embodiment of the present invention. [Figure 8] FIG. 10 is a diagram illustrating an example of PUSCH signal generation according to an embodiment of the present invention. [Figure 9] FIG. 10 is a diagram showing an example (4) of an OCC according to an embodiment of the present invention. [Figure 10] 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention. [Figure 11] FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to the embodiment of the present invention. [Figure 12] 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention. [Figure 13] FIG. 2 is a diagram showing an example of the configuration of a vehicle 2001 according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

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

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

[0012] Furthermore, in the embodiments of the present invention described below, terms used in existing LTE, 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), are used. This is for convenience of description, and similar signals, functions, etc. may be referred to by other names. Furthermore, the above-mentioned terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, NR-PDCCH, NR-PDSCH, NR-PUCCH, NR-PUSCH, etc. However, even signals used in NR are not necessarily designated 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 other methods (for example, Flexible Duplex, etc.).

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

[0015] Figure 1 shows an example of an NTN (1). An NTN (Non-Terrestrial Network) uses non-terrestrial devices such as satellites to provide services to areas that cannot be covered by terrestrial 5G networks, primarily due to cost. NTN also enables the provision of more reliable services. For example, it is expected to be applied to IoT (Internet of Things), ships, buses, trains, and critical communications. NTN also has scalability through efficient multicast or broadcast.

[0016] As an example of an NTN, as shown in FIG. 1, a satellite 10A can retransmit signals transmitted from a terrestrial base station 10B to provide service to areas where no terrestrial base stations are located, such as mountainous regions.

[0017] The terrestrial 5G network may have the following configuration. The terrestrial 5G network includes one or more base stations 10 and terminals 20. The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminals 20. The physical resources of a wireless signal are defined in the time domain and the frequency domain, and the time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. The base station 10 transmits a synchronization signal and system information to the terminals 20. The synchronization signal is, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, on NR-PBCH, and is also called broadcast information.

[0018] The base station 10 transmits control signals or data to the terminal 20 via DL (Downlink) and receives control signals or data from the terminal 20 via UL (Uplink). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming. Furthermore, both the base station 10 and the 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 an SCell (Secondary Cell) and a PCell (Primary Cell) using CA (Carrier Aggregation).

[0019] The terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, an M2M (Machine-to-Machine) communication module, etc. The terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system.

[0020] Figure 2 shows an example of an NTN (2). The area of ​​each cell or beam in an NTN is much larger than that of a terrestrial network (TN). Figure 2 shows an example of an NTN configured with retransmission by satellite. The connection between the satellite 10A and the NTN gateway 10B is called the feeder link, and the connection between the satellite 10A and the UE 20 is called the service link.

[0021] As shown in Figure 2, the difference in delay between UE 20A on the near side and UE 20B on the far side is, for example, 10.3 ms in the case of GEO (Geosynchronous orbit) and 3.2 ms in the case of LEO (Low Earth orbit). Also, the beam size in NTN is, for example, 3500 km in the case of GEO and 1000 km in the case of LEO.

[0022] FIG. 3 is a diagram showing an example (3) of an NTN. As shown in FIG. 3, an NTN is realized by a satellite in space or a flying object in the air. For example, a GEO satellite may be a satellite located at an altitude of 35,786 km and having a geostationary orbit. For example, a LEO satellite may be a satellite located at an altitude of 500-2000 km and orbiting every 88-127 minutes. For example, a HAPS (High Altitude Platform Station) may be a flying object located at an altitude of 8-50 km and performing circular flight.

[0023] As shown in Figure 3, GEO satellites, LEO satellites, and HAPS aircraft may be connected to ground stations (gNBs) via gateways. The service areas may be larger in the order of HAPS, LEO, and GEO.

[0024] For example, NTN can extend the coverage of a 5G network to unserved or served areas. Furthermore, NTN can improve the continuity, availability, and reliability of services on ships, buses, trains, or other critical communications. The NTN may be signaled by transmitting dedicated parameters to the terminal 20, and the dedicated parameters may be parameters related to determining a timing advance (TA) based on information related to a satellite or an aircraft.

[0025] FIG. 4 is a diagram showing an example (4) of an NTN. FIG. 4 shows an example of an NTN network architecture assumed in the case of transparent payload. As shown in FIG. 4, a CN (Core Network) 10D, a gNB 10C, and a gateway 10B are connected. The gateway 10B is connected to a satellite 10A via a feeder link. The satellite 10A is connected to a terminal 20A or a VSAT (Very Small Aperture Terminal) 20B via a service link. An NR Uu is established between the gNB 10C and the terminal 20A or the VSAT 20B.

[0026] NTN's network architecture may be FDD or TDD. Terrestrial cells may be fixed or mobile. Terminal 20 may have the capability to support GNSS (Global Navigation Satellite System). For example, a power class 3 handheld device may be assumed in FR1. A VSAT device may be assumed at least in FR2.

[0027] NTN's network architecture may also assume regenerative payloads. For example, gNB functionality may be mounted on a satellite or air vehicle. Alternatively, a gNB-DU may be mounted on a satellite or air vehicle, and a gNB-CU may be deployed as a ground station.

[0028] In NTN (Non-Terrestrial Network), satellite resources are limited, so the enhancement of UL capacity and throughput is required. Therefore, a method of applying OCC (Orthogonal Cover Code) to DFT-s-OFDM (Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing) is being studied.

[0029] Figure 5 is a diagram showing an example (1) of OCC in an embodiment of the present invention. As shown in Figure 5, time-domain OCC may be applied to PUCCH. Two time-domain repeated sequence-modulated complex symbols y(n), which are PUCCH format 1 (see Non-Patent Document 4), are multiplied by orthogonal sequences w0(m) and w1(m), respectively. The orthogonal sequence w i (m) is defined by the specifications (see Non-Patent Document 4).

[0030] Figure 6 is a diagram showing an example (2) of OCC in an embodiment of the present invention. As shown in Figure 6, frequency domain OCC may be applied to PUCCH. Four repeats of sequence modulated d(0), d(1), d(2), d(3), d(4), and d(5) in the frequency domain, which are PUCCH format 4 (see Non-Patent Document 4), are multiplied by orthogonal sequences w0(k), w1(k), w2(k), and w3(k), respectively. The orthogonal sequence w i (k) is defined by the specifications (see Non-Patent Document 4).

[0031] FIG. 7 is a diagram showing an example (3) of OCC in an embodiment of the present invention. OCC is introduced into DMRS for PUSCH. For FD (Frequency division)-OCC, w f (0) and w f 2FD-OCC employing (1) is used for Basic DMRS, and w f (0) to w f 4FD-OCC, which adopts up to (3), is used for Enhanced DMRS. For TD (Time division)-OCC, w l (0) and w l 2FD-OCC employing (1) is used for double-symbol DMRS. Figure 7 shows an example in which TD-OCC and FD-OCC are applied to DMRS of PUSCH.

[0032] Regarding DMRS ports, the number of ports for the basic DMRS is as follows: Setting Type 1: Single symbol DMRS: 2 (comb / FDM) x 2 (FD-OCC) = 4 ports Double Symbol DMRS: 2 (Comb / FDM) x 2 (FD-OCC) x 2 (TD-OCC) = 8 ports Setting Type 2: Single symbol DMRS: 3 (FDM) x 2 (FD-OCC) = 6 ports Double Symbol DMRS: 3 (comb) x 2 (FD-OCC) x 2 (TD-OCC) = 12 ports

[0033] The number of ports for the extended DMRS is as follows: Setting Type 1: Single symbol DMRS: 4 (comb / FDM) x 2 (FD-OCC) = 8 ports Double Symbol DMRS: 4 (Comb / FDM) x 2 (FD-OCC) x 2 (TD-OCC) = 16 ports Setting Type 2: Single symbol DMRS: 6 (FDM) x 2 (FD-OCC) = 12 ports Double Symbol DMRS: 6 (comb) x 2 (FD-OCC) x 2 (TD-OCC) = 24 ports

[0034] 8 is a diagram showing an example of PUSCH signal generation in an embodiment of the present invention. As shown in FIG. 8, a block b of scrambled bits is ~(q) (i) is input to the sequence modulation. A block of complex modulation symbols d (q) (i) is input to the layer mapping. The complex modulation symbols x(i) of each codeword mapped to a layer are input to the transform precoding. The block of complex modulation symbols y (0) (k) is input to the precoding. The precoded block z (p0) (i) is input to the mapping to physical resources.

[0035] In non-codebook-based transmission, the precoding matrix W is an identity matrix. In codebook-based transmission, the precoding matrix W depends on the number of antenna ports used for transmission (see Non-Patent Document 4).

[0036] As a combination of OCC techniques, at least one of the following OCC techniques 1) to 4) when PUSCH repetition is used may be supported.

[0037] 1) Inter-slot time domain OCC with OCC length 2 2) Inter-slot time domain OCC with OCC lengths 2 and 4 3) Intra-symbol DFT-s pre-OCC with OCC length 2 (comb-like structure of PUCCH format 4) 4) Intra-symbol DFT-s pre-OCC with OCC lengths 2 and 4 (comb-like structure for PUCCH format 4)

[0038] Note that a combination of the above 1) or 2) and the above 3) or 4) may be supported. Also, PUSCH repetition type B may not be considered. However, there are no specifications regarding the details of the OCC code to be applied when performing OCC combination, or the method for determining whether or not to apply OCC combination or detailed parameters when applying it, and therefore the UE cannot properly perform and / or control the OCC combination. Therefore, the UE may apply the following operations.

[0039] As noted above, both a single OCC technology and a combination of two OCC technologies may be options in NTN. How combinations of OCC technologies are supported may be further specified.

[0040] Regarding the combination of OCC techniques, it may specify orthogonal code generation for the combination of OCC techniques, and it may also specify how to determine whether and how the combination of OCC techniques is applied (OCC length, OCC index determination).

[0041] Note that "orthogonal code" or "set of OCC sequences" may refer to a sequence of orthogonal codes applied to PUSCH data transmission for one multiplexed UE. For example, an orthogonal code of length 4 is [1, -1, 1, -1], and "one bit of an orthogonal code" may refer to 1 or -1.

[0042] The combination of OCC techniques may include the following 1)-3).

[0043] 1) Inter-slot time-domain OCC with OCC length 2 and intra-symbol pre-DFT OCC with OCC length 2 2) Inter-slot time-domain OCC with OCC length 4 and intra-symbol pre-DFT OCC with OCC length 2 3) Inter-slot time-domain OCC with OCC length 2 and intra-symbol pre-DFT OCC with OCC length 4

[0044] The inter-slot time-domain OCC may be replaced by an inter-symbol time-domain OCC or an inter-repetition TD-OCC.

[0045] The orthogonal codes or sequences are described in detail below. For orthogonal codes or OCC sequences for DFT-s-OFDM or OFDM PUSCH transmission, Walsh matrices or cyclic shifts may be used to generate the orthogonal codes. Equation 1 and Equation 2 are examples of generating orthogonal codes based on Walsh matrices.

[0046]

number

[0047]

number

[0048] Equations 3 and 4 are examples of generating orthogonal codes based on cyclic shifts.

[0049]

number

[0050]

number

[0051] The same or different methods may be used for generating orthogonal codes or sequences in the time domain and the frequency domain. The methods may be Walsh matrices or cyclic shift codes. Note that when TD and FD-OCC are applied, the same mathematical method may be used to generate orthogonal codes or sequences in the time domain and the frequency domain.

[0052] Let X be the length of the orthogonal code or OCC sequence for DFT-s-OFDM or OFDM PUSCH transmission. X may be a single value or multiple values. When a single value is used for X, X may be predefined or signaled by the network via DCI, RRC signaling, or MAC-CE.

[0053] When multiple values ​​are used for X, X may be predefined, may be signaled by the network, or the value actually used may be signaled by the network via a new DCI field. Also, when multiple values ​​are used for X, the value actually used may be signaled directly by the network.

[0054] Different values ​​may be used for different OCC types for the value of X. Different parameters may be defined or set for the OCC length for TD-OCC and the OCC length for FD-OCC.

[0055] The OCC length for TD-OCC is Xt. Xt may be one or more values ​​from {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14}. Xt for OCCs in different time domains, such as inter-symbol OCC and inter-slot OCC, may have different ranges or granularities.

[0056] Xt may be constrained to be equal to or less than the number of scheduled symbols minus the number of DMRS symbols, or may be a divisor of the number of scheduled symbols minus the number of DMRS symbols.

[0057] When intra-slot hopping is applied, Xt, the number of scheduled symbols, and the number of DMRS symbols may be referred to for each hopping. Different Xt may be defined or set when intra-slot or inter-slot hopping is enabled and disabled.

[0058] The OCC length for FD-OCC is Xf. Xf may be one or more values ​​among {2, 3, 4, 6}, for example. Xf for OCCs in different frequency domains, such as inter-subcarrier OCC and inter-group OCC of multiple subcarriers, may be set to different ranges or granularities.

[0059] When applying TD-OCC and FD-OCC, Xt and Xf may be set or defined independently using a combination of the above methods, or a concatenated index may be signaled or defined to specify the combination of Xt and Xf.

[0060] If the OCC has a length of X, then a total of X indices may be assigned for the set of OCC sequences. For example, indices Y=0, 1, . . . , (X-1) may be defined, with each index corresponding to an element of a particular orthogonal code or sequence set of length X. The association of Y with a particular orthogonal code or sequence may be predefined or signaled by the network.

[0061] For example, if X=2, then Y={0,1}, where index 0 corresponds to the orthogonal code [+1,+1] and index 1 corresponds to [+1,-1]. Each orthogonal code may be assigned to a symbol, slot, subcarrier, or multiple subcarriers based on the OCC type determination.

[0062] Which index is used may be predefined or signaled by the network. Which index is used may be explicitly or implicitly predefined or configured, or may be signaled by the network, for example, by RRC signaling, a new DCI field, several bits of an existing DCI field, a CORESET index, an RNTI value, a CCE index, or the like, or may be implicitly predefined or signaled by the network via the determination of X. X may be implicitly predefined or signaled by the network via the determination of Y.

[0063] Details of the OCC sequence to be applied for multiplexing PUSCH may be defined in the specifications. For example, one table may be predefined, or separate tables for each OCC length may be predefined. For example, in the case of an orthogonal sequence for PUSCH with an OCC length of 4, the OCC indexes may be 0, 1, 2, and 3, and an orthogonal sequence may correspond to each of them. For example, an orthogonal sequence corresponding to an OCC index notified from the network may be applied to PUSCH transmission.

[0064] 9 is a diagram illustrating an example (4) of OCC according to an embodiment of the present invention. In step S101, the UE determines an OCC. In step S102, the UE transmits a PUSCH with repetition to which the determined OCC is applied to the BS. Note that inter-slot OCC may be OCC applied between slots in the time domain, and intra-symbol OCC may be OCC applied within a symbol in the frequency domain. Note that the OCC techniques to be combined are described as inter-slot OCC and intra-symbol OCC, but are not limited to this. For example, OCC applied between symbols in the time domain within the same slot may also be included.

[0065] In the case of PUSCH with repetition, the following option 1) or option 2) may be applied for orthogonal code generation for a combination of OCC techniques.

[0066] Option 1) Orthogonal codes for inter-slot OCC and intra-symbol OCC may be defined independently. Note that in Option 1, the UE may not be expected to be configured or instructed with OCCs generated by different methods for inter-slot OCC and inter-symbol pre-DFT OCC. Note that in the embodiments of the present invention, "method" may refer to a Walsh matrix, a DFT sequence, or any other sequence or matrix.

[0067] Option 2) Orthogonal codes may be predefined for combinations of OCC techniques. For example, a table for combinations of OCC techniques using Walsh matrices may be predefined. Table 1 shows an example of Option 2) where inter-slot OCC length is 2 and intra-symbol OCC length is 4. Wt(i) corresponds to inter-slot OCC, and Wf(i) corresponds to intra-symbol OCC.

[0068] [Table 1]

[0069] Table 2 shows an example of option 2) inter-slot OCC length 4, intra-symbol OCC length 2. Wt(i) corresponds to the inter-slot OCC, and Wf(i) corresponds to the intra-symbol OCC.

[0070] [Table 2]

[0071] Table 3 shows an example of option 2) inter-slot OCC length 2, intra-symbol OCC length 4. Wt(i) corresponds to the inter-slot OCC, and Wf(i) corresponds to the intra-symbol OCC.

[0072] [Table 3]

[0073] Table 4 shows an example of option 2) inter-slot OCC length 4, intra-symbol OCC length 2. Wt(i) corresponds to the inter-slot OCC, and Wf(i) corresponds to the intra-symbol OCC.

[0074] [Table 4]

[0075] The order of the rows in Tables 1 to 4 above may be different.

[0076] The tables for inter-slot OCC length 2 and intra-symbol OCC length 4 and the tables for inter-slot OCC length 4 and intra-symbol OCC length 2 may be reused for tables for inter-slot OCC length 2 and intra-symbol OCC length 2. The first two codes of the OCC length 4 may be used to generate the OCC length 2. That is, some codes starting from the beginning of the codes in the table may be applied to a shorter OCC. Alternatively, the tables for inter-slot OCC length 2 and intra-symbol OCC length 2 may be predefined independently. Table 5 shows an example of option 2) inter-slot OCC length 2, intra-symbol OCC length 2. Wt(i) corresponds to the inter-slot OCC, and Wf(i) corresponds to the intra-symbol OCC.

[0077] [Table 5]

[0078] For PUSCH with repetition, at least one of the following options may be applied for the UE to decide whether a combination of OCC techniques (inter-slot OCC, intra-symbol OCC) is applied and / or which OCC length is applied:

[0079] Option 1) Based on separate instructions for inter-slot OCC and intra-symbol OCC, the UE may determine the OCC to be applied and the parameters associated with the OCC. For example, when a combination of OCC techniques is applied, the OCC length of the inter-slot OCC and the OCC length of the intra-symbol OCC may be configured and / or indicated separately. For example, they may be configured and / or indicated separately via differential parameters or DCI fields. The linkage between the OCC sequences of the OCC techniques may be determined by the network implementation.

[0080] Option 2) Based on the joint indication for inter-slot OCC and intra-symbol OCC, the UE may determine the OCC to be applied and the parameters associated with the OCC. For example, the joint indication may be signaled via a dedicated higher layer parameter (e.g., an RRC parameter) or a new DCI field. For example, the joint indication may include an index corresponding to one of the combinations of the OCC techniques listed below in 1) to 3).

[0081] 1) Inter-slot time-domain OCC with OCC length 2 and intra-symbol pre-DFT OCC with OCC length 2 2) Inter-slot time-domain OCC with OCC length 4 and intra-symbol pre-DFT OCC with OCC length 2 3) Inter-slot time-domain OCC with OCC length 2 and intra-symbol pre-DFT OCC with OCC length 4

[0082] Note that the inter-slot time-domain OCC can be replaced by an inter-symbol time-domain OCC or an inter-repetition TD-OCC.

[0083] For example, the joint instruction may include which table (e.g., the predefined table described above) is applied to the combination of OCC techniques. For example, the indicated OCC length may be associated with whether combination is applied or not. For example, an OCC length of 2 may be associated with single OCC, and an OCC length of 4 may be associated with combined OCC.

[0084] For PUSCH with repetition, when a combination of OCC techniques is applied, the following options may be applied for the UE determination of the OCC index:

[0085] Option 1) The OCC indices for inter-slot and intra-symbol OCC may be signaled separately. For example, the OCC index for inter-slot OCC and the OCC index for intra-symbol OCC may be signaled separately via different parameters and / or DCI fields. Different mechanisms may be applied, for example, semi-static configuration for inter-slot OCC and dynamic signaling for intra-symbol OCC, or dynamic signaling for inter-slot OCC and semi-static configuration for intra-symbol OCC.

[0086] Option 2) A combination index may be defined and signaled based on a table for OCC combinations. The combination index may be mapped to an orthogonal code for inter-slot OCC and an orthogonal code for intra-symbol OCC.

[0087] Tables 6 and 7 are possible options for combinations of inter-slot OCC length 2 and intra-symbol OCC length 4. Table 6 is an example of mapping combination indexes to inter-slot OCC length 2 and intra-symbol OCC length 4 using Walsh matrices, and Table 7 is an example of mapping combination indexes to inter-slot OCC length 2 and intra-symbol OCC length 4 using Walsh matrices.

[0088] [Table 6]

[0089] [Table 7]

[0090] Note that Table 6 or Table 7 can be used for a combination of inter-slot OCC length 2 and intra-symbol OCC length 2. The first two codes of OCC length 4 may be used for OCC length 2. In the case of Table 6, the candidate combination indexes for OCC length 2 are, for example, [2,3,4,5], and in the case of Table 7, the candidate combination indexes for OCC length 2 are, for example, [0,1,2,3]. When the DCI field is used for signaling, the field size may be 2 bits (0 / 1 / 2 / 3) or 4 bits (0 / 1 / ... / 7) with restrictions (e.g., only 0 / 1 / 2 / 3 can be signaled).

[0091] Tables 8 and 9 are possible options for combining inter-slot OCC length 4 and intra-symbol OCC length 2. Table 8 is an example of mapping combination indexes to inter-slot OCC length 4 and intra-symbol OCC length 2 using Walsh matrices, and Table 90 is an example of mapping combination indexes to inter-slot OCC length 4 and intra-symbol OCC length 2 using Walsh matrices.

[0092] [Table 8]

[0093] [Table 9]

[0094] Note that Table 8 or Table 9 can be used for a combination of inter-slot OCC length 2 and intra-symbol OCC length 2. The first two codes of OCC length 4 may be used for OCC length 2. In the case of Table 8, the candidate combination indexes for OCC length 2 are, for example, [2,3,4,5], and in the case of Table 9, the candidate combination indexes for OCC length 2 are, for example, [0,1,2,3]. When the DCI field is used for signaling, the field size may be 2 bits (0 / 1 / 2 / 3) or 4 bits (0 / 1 / ... / 7) with restrictions (e.g., only 0 / 1 / 2 / 3 can be signaled).

[0095] Table 10 shows an example of option 2) inter-slot OCC length 2, intra-symbol OCC length 2. Wt(i) corresponds to the inter-slot OCC, and Wf(i) corresponds to the intra-symbol OCC.

[0096] [Table 10]

[0097] The order of the rows in Tables 6 to 10 above may be different.

[0098] The combination index may be set semi-statically or may be announced dynamically.

[0099] For example, separate configuration and / or signaling may be performed between PUSCH types.

[0100] For example, different configurations and / or notifications may be performed for different PUSCH types. The PUSCH type may be any one of a dynamic grant (DG)-PUSCH, a configured grant (CG)-PUSCH, a CG or DG-PUSCH for RACH-less handover, a PUSCH scheduled by a random access response (RAR)-UL grant corresponding to contention-free random access (CFRA), a small data transmission (SDT)-CG, and semi-persistent channel state information (SP-CSI) on a PUSCH. A method of dynamically notifying via DCI may be applicable to a mechanism for configuring and / or notifying combination indexes. CSI configuration or CG configuration may be used for individual configuration and / or notification of combination indexes.

[0101] The UE capability report may include:

[0102] ·Whether to support the combination of inter-symbol OCC length 2 and intra-symbol OCC length 2. ·Whether to support the combination of inter-symbol OCC length 4 and intra-symbol OCC length 2. ·Whether to support the combination of inter-symbol OCC length 2 and intra-symbol OCC length 4. · Whether to support new tables for generating orthogonal codes for OCC technology combinations. · Whether to support new OCC parameters for the combination index for OCC technology combination.

[0103] Note that "orthogonal code" / "set of OCC sequences" may refer to a sequence of orthogonal codes applied to PUSCH data transmission for one multiplexed UE. For example, an orthogonal code of length 4 is [1, -1, 1, -1], and "one bit of an orthogonal code" means 1 or -1.

[0104] In this IPR, the combination of OCC techniques may include: Inter-slot time-domain OCC with OCC length 2 and intra-symbol pre-DFT OCC with OCC length 2 Inter-slot time-domain OCC with OCC length 4 and intra-symbol pre-DFT OCC with OCC length 2 Inter-slot time-domain OCC with OCC length 2 and intra-symbol pre-DFT OCC with OCC length 4

[0105] Note that the inter-slot time domain OCC can be replaced with the inter-symbol time domain OCC.

[0106] The UE may report the following capabilities: The capabilities of each option for the above actions, or the capabilities of a combination of options. -The abilities of each option or combination of options in the above actions.

[0107] The UE may report the above capabilities per frequency. Alternatively, the UE may report the capabilities per UE, per FR1, FR2, FR2-1, FR2-2, per SCS, per band, per BC, per FC, or per FSPC. The UE may report the above capabilities per cell. Alternatively, the UE may report the capabilities per UE, per cell, or per TDD and FDD.

[0108] Throughout the embodiments of the present invention, whether and which suggestions are applied and / or which options or alternatives are used may be set or determined by the following:

[0109] May be set by higher layer parameters. · May be determined by related higher order parameters. May be signaled by MAC-CE or DCI. May be determined based on UE capabilities. May be determined by higher layer parameters / MAC-CE / DCI configuration and reported UE capabilities (combination of the above decisions).

[0110] Throughout the embodiments of the present invention, multiple options and alternatives may be combined into one option or alternative. Throughout the embodiments of the present invention, the UE may assume that some suggestions, suggested options, or suggested alternatives may only be applied if the UE reports that it supports a certain feature or model.

[0111] The UE can receive the following types of information from the NW (which can also be referred to as a BS or gNB):

[0112] Information via higher layer signaling (e.g., RRC messages / LPP (LTE Positioning Protocol) messages). MAC-CE. A MAC-CE with a new LCID in the subheader. Extending the existing MAC-CE (e.g., introducing a new octet). DCI. May have an existing DCI field or a newly introduced DCI field. May be DCI with a CRC scrambled by an existing RNTI or a newly introduced RNTI. DCI format may be an existing DCI format or a newly introduced DCI format. -It may be a combination of the above information.

[0113] The UE can receive information from the NW in the following periodic types: Option 1: Periodic Option 2: Semi-persistent (triggered by UE or BS instruction) Option 3: Aperiodic (triggered by UE or BS indication)

[0114] The UE can report information to the NW as the following types (the NW can be replaced with a BS or gNB): · Information via higher layer signaling (e.g. RRC messages / LPP messages). MAC-CE. It may be a MAC-CE with a new LCID in the subheader, or it may extend an existing MAC-CE (e.g., introduce a new octet). UCI, which may be UCI on PUCCH or PUSCH. -It may be a combination of the above information.

[0115] The UE can report information from the NW in the following periodic types: Option 1: Periodic Option 2: Semi-persistent (triggered by UE or BS instruction) Option 3: Aperiodic (triggered by UE or BS indication)

[0116] According to the above-described embodiment, by applying OCC to uplink channels, it is possible to achieve an increase in UL capacity and an improvement in throughput in the system. The UE can appropriately perform and control the combination of OCC techniques, thereby achieving an increase in UL capacity and an improvement in throughput compared to a system in which the combination of OCC techniques cannot be applied.

[0117] That is, the uplink capacity can be increased in the wireless communication system.

[0118] (Device configuration) Next, a description will be given of an example of the functional configuration of the base station 10 and the terminal 20 that execute the processes and operations described above. The base station 10 and the terminal 20 include functions for implementing the above-described embodiments. However, the base station 10 and the terminal 20 may each include only a part of the functions of the embodiments.

[0119] <Base station 10> Fig. 10 is a diagram showing an example of the functional configuration of base station 10 in the embodiment of the present invention. As shown in Fig. 10, base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Fig. 10 is merely an example. The functional divisions and names of the functional units may be any names as long as they can perform the operations related to the embodiment of the present invention.

[0120] The transmitter 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. The transmitter 110 also transmits inter-network node messages to other network nodes. The receiver 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of higher layers from the received signals. The transmitter 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, etc. to the terminal 20. The receiver 120 also receives inter-network node messages from other network nodes.

[0121] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20. The content of the setting information is, for example, information related to communication in the NTN.

[0122] As described in the embodiment, the control unit 140 controls communication in the NTN. The control unit 140 also controls communication with the terminal 20 based on a UE capability report regarding radio parameters received from the terminal 20. A functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and a functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120.

[0123] <Terminal 20> Fig. 11 is a diagram showing an example of the functional configuration of terminal 20 in the embodiment of the present invention. As shown in Fig. 11, terminal 20 has transmitting unit 210, receiving unit 220, setting unit 230, and control unit 240. The functional configuration shown in Fig. 11 is merely an example. The names of the functional divisions and functional units may be any as long as they can execute the operations related to the embodiment of the present invention.

[0124] The transmitter 210 creates a transmission signal from transmission data and transmits the transmission signal wirelessly. The receiver 220 receives various signals wirelessly and acquires higher layer signals from the received physical layer signals. The receiver 220 also has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, and the like transmitted from the base station 10. For example, the transmitter 210 transmits a PSCCH (Physical Sidelink Control Channel), a PSSCH (Physical Sidelink Shared Channel), a PSDCH (Physical Sidelink Discovery Channel), a PSBCH (Physical Sidelink Broadcast Channel), and the like to another terminal 20 as D2D communication, and the receiver 120 receives the PSCCH, PSSCH, PSDCH, or PSBCH, and the like, from the other terminal 20.

[0125] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220. The setting unit 230 also stores setting information that is set in advance. The content of the setting information is, for example, information related to communication in the NTN.

[0126] As described in the embodiment, the control unit 240 controls communication in the NTN. The function unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the function unit related to signal reception in the control unit 240 may be included in the receiving unit 220.

[0127] (Hardware configuration) The block diagrams (FIGS. 10 and 11) used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining the single device or the multiple devices with software.

[0128] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocation, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0129] For example, the base station 10, the terminal 20, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 12 is a diagram illustrating an example of the hardware configuration of the base station 10 and the terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 described above may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0130] In the following description, the term "apparatus" can be read as a circuit, a device, a unit, etc. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0131] Each function in the base station 10 and the terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001, the memory device 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls at least one of reading and writing data in the memory device 1002 and the auxiliary memory device 1003.

[0132] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 140, control unit 240, etc. may be realized by the processor 1001.

[0133] Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes in accordance with the programs. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 140 of the base station 10 shown in FIG. 10 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. Furthermore, for example, the control unit 240 of the terminal 20 shown in FIG. 11 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line.

[0134] The storage device 1002 is a computer-readable recording medium and may be configured, for example, by at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The storage device 1002 may also be called a register, a cache, a main memory, etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.

[0135] The secondary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. The above-mentioned storage medium may be, for example, a database, a server, or other suitable medium including at least one of the storage device 1002 and the secondary storage device 1003.

[0136] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, a transmission / reception antenna, an amplifier unit, a transmission / reception unit, a transmission path interface, etc. may be realized by the communication device 1004. The transmission / reception unit may be implemented as a transmission unit and a reception unit that are physically or logically separated.

[0137] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0138] Furthermore, each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0139] Furthermore, base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

[0140] Fig. 13 shows an example configuration of a vehicle 2001. As shown in Fig. 13, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in the present disclosure may be applied to a communication device mounted on the vehicle 2001, and may be applied to the communication module 2013, for example.

[0141] The drive unit 2002 is configured, for example, by an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0142] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0143] The signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a front or rear wheel rotation speed signal obtained by a rotation speed sensor 2022, a front or rear wheel air pressure signal obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0144] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various types of information, such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 2012 uses information acquired from external devices via the communication module 2013 or the like to provide various types of multimedia information and multimedia services to the occupants of the vehicle 2001. The information service unit 2012 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that output information to the outside.

[0145] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as a millimeter-wave radar, a LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high-definition (HD) map, autonomous vehicle (AV) map, etc.), a gyro system (e.g., an IMU (Inertial Measurement Unit), an INS (Inertial Navigation System), etc.), an AI (Artificial Intelligence) chip, and an AI processor, as well as one or more ECUs that control these devices. The driving assistance system unit 2030 also transmits and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0146] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided in the vehicle 2001.

[0147] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station, a mobile station, or the like.

[0148] The communication module 2013 may transmit at least one of signals from the above-mentioned various sensors 2021-2028 input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above-mentioned input.

[0149] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on an information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 2013). The communication module 2013 also stores the various information received from external devices in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.

[0150] (Summary of the embodiment) As described above, according to an embodiment of the present invention, there is provided a terminal including: a controller that determines an orthogonal cover code (OCC) to be applied to a repetition of a physical uplink shared channel modulated by DFT-s-OFDM (Discrete Fourier transform spread Orthogonal Frequency Division Multiplexing) or OFDM; and a transmitter that transmits the repetition of the physical uplink shared channel to which the OCC has been applied to a base station, wherein the controller applies an OCC to be applied to a time domain and an OCC to be applied to a frequency domain, which are independently defined, to the repetition of the physical uplink shared channel.

[0151] With the above configuration, by applying OCC to the uplink channel, it is possible to increase the UL capacity and improve the throughput in the system. That is, it is possible to increase the uplink capacity in the wireless communication system.

[0152] The control unit does not need to assume that the OCC applied to the time domain and the OCC applied to the frequency domain are generated by different methods. With this configuration, by applying the OCC to the uplink channel, it is possible to achieve an increase in UL capacity and an improvement in throughput in the system.

[0153] The controller may apply a combination of a predefined OCC to be applied to the time domain and a predefined OCC to be applied to the frequency domain to the repetition of the physical uplink shared channel. With this configuration, by applying OCC to uplink channels, an increase in UL capacity and an improvement in throughput in the system can be achieved.

[0154] When an OCC to be applied to the time domain or an OCC to be applied to the frequency domain is predefined, the control unit may apply a part of codes starting from the beginning to a shorter OCC. With this configuration, by applying an OCC to an uplink channel, an increase in UL capacity and an improvement in throughput in the system can be achieved.

[0155] The control unit may determine whether the OCC to be applied to the time domain and the OCC to be applied to the frequency domain are reported separately or in combination. With this configuration, applying OCC to uplink channels can increase UL capacity and improve throughput in the system.

[0156] Furthermore, according to an embodiment of the present invention, there is provided a communication method in which a terminal executes the following procedures: a procedure of determining an orthogonal cover code (OCC) to be applied to a repetition of a physical uplink shared channel modulated by DFT-s-OFDM (Discrete fourier transform spread orthogonal frequency division multiplexing) or OFDM; a procedure of transmitting the repetition of the physical uplink shared channel to which the OCC has been applied to a base station; and a procedure of applying an OCC to be applied to a time domain and an OCC to be applied to a frequency domain, which are independently defined, to the repetition of the physical uplink shared channel.

[0157] With the above configuration, by applying OCC to the uplink channel, it is possible to increase the UL capacity and improve the throughput in the system. That is, it is possible to increase the uplink capacity in the wireless communication system.

[0158] (Supplementary explanation of the embodiment) Although the 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, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; two or more items may be combined as needed, and items described in one item may apply to items described in another item (unless inconsistent). The boundaries between functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of the processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 have been described using functional block diagrams. However, such devices may be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention may each 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.

[0159] Furthermore, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling), broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0160] Each aspect / embodiment described in the present disclosure may be applied to at least one of systems using LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (New Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark), IEEE 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), or other appropriate systems, and next-generation systems extended based on these. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G, etc.) may also be applied.

[0161] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described herein may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order and are not limited to the particular order presented.

[0162] In this specification, a specific operation that is described as being performed by the base station 10 may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having the base station 10, it is clear that various operations performed for communication with the terminal 20 may be performed by at least one of the base station 10 and another network node other than the base station 10 (such as, but not limited to, an MME or an S-GW). Although the above example illustrates a case where there is one other network node other than the base station 10, the other network node may be a combination of multiple other network nodes (such as an MME and an S-GW).

[0163] The information or signals described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input / output via multiple network nodes.

[0164] Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

[0165] In the present disclosure, the determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0166] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0167] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0168] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0169] Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0170] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0171] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by an index.

[0172] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0173] In the present disclosure, terms such as "base station (BS)," "radio base station," "base station device," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0174] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0175] In the present disclosure, the base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.

[0176] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0177] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0178] At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, etc. The mobile object refers to a movable object, and may move at any speed. Naturally, this also includes cases where the mobile object is stationary. Examples of the mobile object include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon. The mobile object may also be a mobile object that moves autonomously based on an operational command. It may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0179] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0180] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station may be configured to have the functions of the user terminal described above.

[0181] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0182] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0183] The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.

[0184] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0185] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0186] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0187] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0188] A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0189] Numerology may be communication parameters that apply to at least one of transmission and reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0190] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may be a time unit based on numerology.

[0191] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0192] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0193] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0194] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units. Note that the definition of TTI is not limited to this.

[0195] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0196] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0197] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0198] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0199] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0200] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0201] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0202] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0203] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0204] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0205] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0206] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0207] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0208] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0209] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0210] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure. [Explanation of symbols]

[0211] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 terminals 210 Transmitter 220 Receiving unit 230 Setting Section 240 Control Unit 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication equipment 1005 Input Device 1006 Output Device 2001 Vehicle 2002 Drive unit 2003 Steering section 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 RPM Sensor 2023 Air Pressure Sensor 2024 Vehicle speed sensor 2025 Acceleration Sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object Detection Sensor 2029 Accelerator pedal sensor 2030 Driving Assistance Systems Department 2031 microprocessor 2032 memory (ROM, RAM) 2033 Communication port (IO port)

Claims

1. a control unit that determines an orthogonal cover code (OCC) to be applied to a repetition of a physical uplink shared channel modulated by DFT-s-OFDM (Discrete Fourier transform spread Orthogonal Frequency Division Multiplexing) or OFDM; a transmitter that transmits the repetition of the physical uplink shared channel to which the OCC is applied to a base station, The terminal, wherein the control unit applies an OCC to be applied to a time domain and an OCC to be applied to a frequency domain, which are independently defined, to the repetition of the physical uplink shared channel.

2. The terminal according to claim 1 , wherein the control unit does not assume that the OCC applied to the time domain and the OCC applied to the frequency domain are generated by different methods.

3. The terminal according to claim 1 , wherein the control unit applies a predefined combination of an OCC to be applied to the time domain and an OCC to be applied to the frequency domain to the repetition of the physical uplink shared channel.

4. The terminal according to claim 1 , wherein, when an OCC to be applied to the time domain or an OCC to be applied to the frequency domain is defined in advance, the control unit applies some codes starting from the beginning to a shorter OCC.

5. The terminal according to claim 1 , wherein the control unit determines whether the OCC to be applied to the time domain and the OCC to be applied to the frequency domain are notified separately or in combination.

6. a procedure for determining an orthogonal cover code (OCC) to be applied to a repetition of a physical uplink shared channel modulated by DFT-s-OFDM (Discrete Fourier transform spread Orthogonal Frequency Division Multiplexing) or OFDM; transmitting, to a base station, a repetition of the physical uplink shared channel to which the OCC is applied; a procedure for applying an OCC to be applied to a time domain and an OCC to be applied to a frequency domain, which are independently defined, to the repetition of the physical uplink shared channel, by a terminal.

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