Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure includes: a control unit that determines a sequence that depends on an antenna point and at least one of one or more antenna groups, each of the one or more antenna groups including multiple antenna points; and a transmitting / receiving unit that transmits or receives a signal based on the sequence. According to one embodiment of the present disclosure, communication can be appropriately performed even when utilizing distributed MIMO technology.

Description

Technical Field

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

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

[0003] Successor systems to LTE (e.g., also known as the fifth generation mobile communication system (5G), 5G+ (plus), the sixth generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later, etc.) are also being studied.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-Patent Document 1: 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] In NR after Rel.17, research is underway to expand regional coverage by using distributed MIMO (Multiple Input Multi Output) based on millimeter wave (mmWave) in communications between user terminals (user terminals, User Equipment (UE)) and networks (NW), such as base stations.

[0009] While research is underway on the distributed MIMO technology adopted after Rel. 17, no research has been conducted on the control method for UEs communicating with the network. If this control is not clarified, there is a concern that the increase in communication throughput will be suppressed.

[0010] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately perform communication even when the distributed MIMO technology is effectively utilized.

[0011] Means for solving problems

[0012] A terminal according to one embodiment of the present disclosure includes: a control unit that determines a sequence that depends on an antenna point and at least one of one or more antenna groups, each of the one or more antenna groups including multiple antenna points; and a transmitting and receiving unit that transmits or receives a signal based on the sequence.

[0013] Effects of the Invention

[0014] According to one embodiment of the present disclosure, communication can be appropriately performed even when the distributed MIMO technology is effectively utilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram showing an example of SFN within a tunnel.

[0016] Figure 2A as well as Figure 2B This is a diagram showing an example of configuring multiple antennas or multiple TRPs around a base station.

[0017] Figure 3A as well as Figure 3B This is a diagram showing an example of the configuration of antennas arranged around a base station.

[0018] Figure 4 This is a diagram showing an example of communication based on the antenna structure (1).

[0019] Figure 5 This is a diagram showing an example of communication based on the antenna structure (2).

[0020] Figure 6A as well as Figure 6B This is a diagram showing an example of communication based on the antenna structure (2).

[0021] Figure 7A as well as Figure 7B This is a diagram showing an example of the relationship between antenna points and antenna groups.

[0022] Figure 8A as well as Figure 8B This is a diagram showing an example of the relationship between antenna points and antenna groups.

[0023] Figure 9 This is a diagram showing an example of the relationship between antenna points, antenna ports, and antenna groups.

[0024] Figure 10 This is a diagram showing an example of the relationship between antenna points and sequences according to sequence determination method 1.

[0025] Figure 11 This is a diagram showing an example of the relationship between antenna points and sequences according to sequence determination method 2.

[0026] Figure 12 This is a diagram showing an example of the relationship between antenna points and sequences according to sequence determination method 3.

[0027] Figure 13A as well as Figure 13B This is a diagram showing an example of OCC spanning multiple antenna points.

[0028] Figure 14A as well as Figure 14B This is a diagram showing another example of OCC across multiple antenna points.

[0029] Figure 15 This is a diagram showing an example of OCC.

[0030] Figure 16 This is a diagram showing an example of a schematic configuration of a wireless communication system according to one embodiment.

[0031] Figure 17 This is a diagram showing an example of the configuration of a base station according to one embodiment.

[0032] Figure 18 This is a diagram showing an example of the configuration of a user terminal according to one embodiment.

[0033] Figure 19 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment. DETAILED DESCRIPTION

[0034] Wireless communication methods using millimeter waves have been introduced in subsequent systems of LTE (e.g., the fifth generation mobile communication system (5G), 5G+ (plus), and New Radio (NR)). Hybrid beamforming (e.g., beam management) based on massive MIMO has been introduced in Rel.15NR, and distributed MIMO (multiple TRPs) has been introduced in Rel.16NR, thereby improving the communication speed and reliability of the downlink shared channel (PDSCH).

[0035] In NR versions later than Rel.17, we expect improvements in communication speed and reliability for channels other than the downlink shared channel (PDSCH) based on distributed MIMO (multi-TRP). Furthermore, in NR versions later than Rel.17, we expect improvements in beam management in scenarios using high-speed moving vehicles such as trains (HTS (High Speed ​​Train)).

[0036] However, the improvements in communication speed and reliability are best-effort types, and their application areas are limited.

[0037] In the subsequent systems of NR (for example, also referred to as 5G+, 6G, etc.), compared with the above-mentioned 5G, high data rate / capacity, wide coverage, low energy / cost, low latency, high reliability, multiple connections, etc. are required. In addition, in this disclosure, "A / B" may also mean "at least one of A and B".

[0038] With the aforementioned 6G requirements, there is an expectation of a shift from best-effort communications to quality-assured communications. Furthermore, there is an expectation that high-speed and highly reliable communications will be expanded to be used across the entire region, rather than being limited to specific areas.

[0039] Wireless communication methods utilizing millimeter waves face numerous challenges. For example, there are concerns about increased propagation loss due to increased communication distance, increased non-line-of-sight (NLOS) losses due to the high linearity of radio waves, difficulties implementing high-order SU-MIMO (Single User MIMO) due to reduced multipath, and increased device density due to increased device size.

[0040] LTE systems utilize a single frequency network (SFN) that uses multiple small antennas within structures (e.g., tunnels and buildings), with each antenna having the same cell ID. SFN uses multiple antennas to simultaneously transmit the same signal within the same physical resource block (PRB). UEs receiving the signal perceive the signal as being transmitted from a single point.

[0041] Figure 1 This is a diagram showing an example of SFN in a tunnel. Figure 1 For example, a large antenna is installed outside the tunnel (e.g., near the tunnel entrance), and a small antenna is installed inside the tunnel. The large antenna may have a transmission power of approximately 1-5W, for example. The small antenna may have a transmission power of approximately 250mW, for example. The large antenna may also transmit downlink (DL) signals both inside and outside the tunnel, and the small antenna may also transmit DL signals inside the tunnel. The large antenna may also be used for handover before the UE enters the tunnel. Figure 1 The large antenna and the small antenna can also send the same DL signal to a UE in the same PRB at the same time. Figure 1 The arrangement of each antenna and the transmission power in FIG. 3 are merely examples and are not limited to these examples. In addition, the SFN in the tunnel may be replaced with an IMCS (In-Building Mobile Communication System).

[0042] In addition, in the present disclosure, “transmission of DL signals in the antenna” may be replaced by “reception of uplink (UL) signals in the antenna.” Furthermore, “reception of DL signals in the UE” may be replaced by “transmission of UL signals in the UE.”

[0043] In order to expand the area where distributed MIMO using millimeter waves is effectively used, a method of spreading multiple antenna points is being studied. Figure 2A The method shown is to ensure a high-speed, high-reliability area by starting with a low-frequency base station with a relatively wide coverage area and spreading multiple high-frequency antennas with a relatively narrow coverage area.

[0044] In addition, in the present disclosure, a low-frequency base station with a relatively wide coverage range may also be referred to as a base station. In addition, a high-frequency antenna with a relatively narrow coverage range may also be referred to as an antenna.

[0045] These multiple antennas can be installed not only outdoors but also on indoor ceilings or walls. For example, they can be installed near indoor lighting sources. In this case, multiple UEs in the room are likely to be within their field of view, which can reduce propagation losses.

[0046] Figure 2A is a diagram showing an example of configuring multiple antennas around a base station. Figure 2A While such a method of distributing antenna points can be implemented at low cost, it is difficult to optimize resource utilization efficiency, and there is a problem that propagation loss increases as the distance between high-frequency antennas increases.

[0047] Meanwhile, to expand the area where millimeter-wave distributed MIMO can be effectively utilized, research is underway to extend some base station functions to the vicinity of high-frequency antennas. This approach is similar to deploying multiple transmission / reception points (TRPs) around a base station.

[0048] Figure 2B is a diagram showing an example of configuring multiple TRPs around a base station. Figure 2B Such a method of extending multiple TRPs to the periphery of the base station can control resources for each TRP, and even if the distance between TRPs is extended, the propagation loss can be reduced by effectively utilizing optical fibers, etc.

[0049] In this disclosure, an "antenna point" may also mean an "antenna corresponding to (equivalent to) a physical antenna element" or an "antenna corresponding to (equivalent to) multiple physical antenna elements (physical antenna elements)." Furthermore, an antenna port may also mean an "antenna as a signal processing unit consisting of one or more antenna points," a "signal processing unit corresponding to one or more antenna points," or a "logical entity corresponding to signals output from one or more antenna points." Furthermore, an "antenna group" may also mean a "multiple antennas consisting of one or more antenna points" or a "multiple antennas consisting of one or more antenna ports."

[0050] In addition, in the present disclosure, "antenna point" can also be replaced with "antenna end", "antenna port", "antenna group", "antenna element", "antenna position", "high-frequency antenna point", "high-frequency antenna end", "high-frequency antenna port", "high-frequency antenna group", "high-frequency antenna element", "high-frequency antenna position", etc.

[0051] In addition, in the present disclosure, "antenna group" can also be replaced with "antenna group", "antenna set (antenna set)", "high-frequency antenna group", "high-frequency antenna group", "high-frequency antenna set (high-frequency antenna set)", etc.

[0052] As a method of spreading multiple antenna points to expand the area where distributed MIMO using millimeter waves is effectively utilized, two structures are being studied.

[0053] One is like Figure 3A In this way, a structure is being studied in which high-frequency antennas are connected with wires or the like and continuously extended in a certain direction (antenna structure (1)). In the case of this antenna structure, although the structural cost can be reduced, it is believed that the antenna loss becomes greater near the antenna farther from the base station.

[0054] Another is Figure 3B In this way, a structure (antenna structure (2)) in which a portion of the antennas are relayed (for example, using optical fiber, IAB, etc.) is being studied. In the case of this antenna structure, antenna loss can be suppressed even for antennas that are relatively far from the base station.

[0055] In the case of antenna configuration (1), the same signal can also be transmitted from all antenna points. If a UE is near any of the multiple high-frequency antenna points, DL communication can be performed with that UE. In this case, the NW does not need to identify which antenna the UE is near, thus reducing overhead. However, if the same transmission signal is transmitted from all antenna points, the frequency utilization efficiency at that location deteriorates.

[0056] Figure 4 This is a diagram showing an example of communication based on the antenna structure (1). Figure 4 In this case, the DL signal for UE1 is transmitted from the high-frequency antenna. In this case, UE1 near the high-frequency antenna can communicate. The signal transmitted to UE1 from the high-frequency antenna, which is relatively far from the base station, contributes little to improving the received signal for UE1. Therefore, it is preferable to similarly efficiently utilize frequency resources for UE2 and other devices near the high-frequency antenna.

[0057] In order to solve the problem of the above-mentioned antenna structure (1), it is considered to divide a series of antenna points into a plurality of antenna points, set up an antenna group consisting of a plurality of continuous antenna points, and transmit an independent transmission signal to each antenna group.

[0058] Figure 5 is a diagram showing an example of communication based on antenna structure (2). Figure 5 In that case, when the antenna points closer to the base station (antenna points #1-#4) are set as the first antenna group and the antenna points farther from the base station (antenna points #5-#8) are set as the second antenna group, UE1 located near the first antenna group and UE2 located near the second antenna group can communicate with the NW appropriately.

[0059] in addition, Figure 5 The structure of the example has the function of scheduling the base station according to each antenna group, can perform relaying according to each antenna group (for example, relaying based on optical fiber extension, etc.), and can also have part of the function of the base station according to each antenna group.

[0060] In antenna configuration (2), the same DL signal / reference signal (RS) may be transmitted from each antenna group. In addition, in antenna configuration (2), the same (common) DL signal / RS may be transmitted from some antenna groups, and different DL signals / RS may be transmitted from other antenna groups.

[0061] Figure 6A as well as Figure 6B This is a diagram showing an example of communication based on the antenna structure (2). Figure 6A In the first antenna group and the second antenna group, a common DL signal is transmitted to UE1 and UE2. Figure 6B In the example, DL signal 1 for UE1 is transmitted in the first antenna group, and DL signal 2 for UE2 is transmitted in the second antenna group.

[0062] (TCI, spatial relationship, QCL)

[0063] In NR, research is underway to control the reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and coding) of at least one of a signal and a channel (hereinafter referred to as signal / channel) in the UE based on the transmission configuration indication state (TCI state).

[0064] The TCI state may also indicate the state of a signal / channel applied to a downlink. A state equivalent to the TCI state applied to a signal / channel applied to an uplink may also be expressed as a spatial relation.

[0065] The TCI status is information related to Quasi-Co-Location (QCL) of signals / channels and may also be referred to as spatial reception parameters, spatial relation information, etc. The TCI status may be set for each channel or each signal for the UE.

[0066] In addition, in the present disclosure, the TCI state of DL can also be replaced with the spatial relationship of UL, the TCI state of UL, etc.

[0067] QCL is an indicator of the statistical properties of a signal / channel. For example, it can also mean that when a signal / channel is in a QCL relationship with other signals / channels, it can be assumed that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial parameters (e.g., spatial Rx parameters) is the same among these different signals / channels (at least one of which is QCL).

[0068] In addition, the spatial reception parameter may also correspond to the UE's receive beam (e.g., receive analog beam), and the beam may also be determined based on spatial QCL. The QCL (or at least one element of QCL) in this disclosure may also be replaced with sQCL (spatial QCL).

[0069] Multiple types (QCL types) may be specified for QCLs. For example, four QCL types AD may be provided, and parameters (or parameter sets) that can be assumed to be the same in these four QCL types AD are different. These parameters (also referred to as QCL parameters) are expressed as follows:

[0070] QCL Type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread,

[0071] QCL type B (QCL-B): Doppler shift and Doppler spread,

[0072] QCL type C (QCL-C): Doppler shift and average delay,

[0073] QCL type D (QCL-D): spatial reception parameters.

[0074] The situation where the UE assumes that a specific control resource set (CORESET), channel or reference signal is in a specific QCL (e.g., QCL type D) relationship with other CORESETs, channels or reference signals can also be called QCL assumption.

[0075] The UE may also determine at least one of the transmit beam (Tx beam) and receive beam (Rx beam) of the signal / channel based on the TCI status or QCL assumption of the signal / channel.

[0076] The TCI status may also be information related to the QCL between the target channel (in other words, the reference signal (RS) used for the channel) and other signals (for example, other RSs). The TCI status may also be set (indicated) through higher layer signaling, physical layer signaling, or a combination thereof.

[0077] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0078] MAC signaling may use, for example, MAC Control Element (MAC CE) and MAC Protocol Data Unit (MAC PDU). Broadcast information may include, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), and Other System Information (OSI).

[0079] The physical layer signaling may also be, for example, downlink control information (DCI).

[0080] The channel for which the TCI state or spatial relationship is set (specified) may be, for example, at least one of the downlink shared channel (Physical Downlink Shared Channel (PDSCH)), the downlink control channel (Physical Downlink Control Channel (PDCCH)), the uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and the uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0081] In addition, the RS that has a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (Synchronization Signal Block (SSB)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called QRS).

[0082] The SSB is a signal block that includes at least one of the primary synchronization signal (PSS), the secondary synchronization signal (SSS), and the broadcast channel (physical broadcast channel (PBCH)). The SSB may also be referred to as an SS / PBCH block.

[0083] The TCI state information element ("TCI-state IE" of RRC) set by high-layer signaling may also include one or more QCL information ("QCL-Info"). The QCL information may also include at least one of information related to the RS that forms a QCL relationship (RS relationship information) and information indicating the QCL type (QCL type information). The RS relationship information may also include information such as the index of the RS (for example, SSB index, non-zero-power CSI-RS (Non-Zero-Power (NZP) CSI-RS) resource ID (Identifier)), the index of the cell where the RS is located, and the index of the bandwidth part (Bandwidth Part (BWP)) where the RS is located.

[0084] In Rel.15NR, as the TCI state of at least one of PDCCH and PDSCH, both RS of QCL type A and RS of QCL type D or only RS of QCL type A can be set to the UE.

[0085] When TRS is configured as the RS of QCL Type A, it is assumed that the TRS is different from the demodulation reference signal (DMRS) of PDCCH or PDSCH, and the same TRS is periodically transmitted for a long time. The UE can measure the TRS and calculate the average delay, delay spread, etc.

[0086] A UE in which the TCI state of the DMRS of a PDCCH or PDSCH is set as a QCL Type A RS using the TRS can assume that the parameters (average delay, delay spread, etc.) of the QCL Type A of the DMRS of the PDCCH or PDSCH are the same as those of the TRS. Therefore, the parameters (average delay, delay spread, etc.) of the Type A of the DMRS of the PDCCH or PDSCH can be calculated based on the measurement results of the TRS. When performing channel estimation for at least one of the PDCCH and PDSCH, the UE can use the measurement results of the TRS to perform more accurate channel estimation.

[0087] A UE configured with a QCL type D RS can determine a UE reception beam (spatial domain reception filter, UE spatial domain reception filter) using the QCL type D RS.

[0088] The RS of QCL type X in the TCI state may also refer to an RS that is in a QCL type X relationship with a certain channel / signal (DMRS), and the RS may also be referred to as a QCL source of QCL type X in the TCI state.

[0089] (Sequence Generation)

[0090] The sequence used in the DL or UL signal can also be at least one of pseudo-random (Pseudo-Random, Pseudo-Noise (PN)), low peak-to-average ratio (PAPR), and orthogonal cover code (OCC).

[0091] The pseudo-random sequence is defined by a Gold sequence of length 31. The pseudo-random sequence (output sequence) c(n) is defined by the following formula.

[0092] Formula (1)

[0093] c(n)=(x1(n+N C )+x2(n+N C ))mod 2

[0094] x1(n+31)=(x1(n+3)+x1(n))mod 2

[0095] x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod 2

[0096] c init =∑ i＝030 x2(i)·2 i

[0097] N C = 1600. The first m sequence x1(n) is initialized by x1(0) = 1, x1(n) = 0, n = 1, 2, ..., 30. The second m sequence x2(n) is initialized by c init is initialized. c init It varies depending on the application object of the sequence.

[0098] Low PAPR sequences are defined by cyclic shifts of a base sequence. Multiple base sequences are divided into sequence groups. A base sequence is identified by a sequence group number u∈{0, 1, …, 29} and a base sequence number (sequence number) v within the sequence group. The base sequence can be a Constant Amplitude Zero AutoCorrelation (CAZAC) sequence (e.g., a Zadoff-Chu sequence) or a sequence that conforms to a CAZAC sequence (e.g., a computer-generated sequence (CGS)).

[0099] When the low PAPR sequence length is greater than 36, the low PAPR sequence may also be a CAZAC sequence. ZC It can also be less than the low PAPR sequence length M ZC When the low PAPR sequence length is shorter than 36, the low PAPR sequence may also be CGS. CGS may also be specified in a specification (eg, a table).

[0100] At least one of the sequence group number u and the sequence number v may be based on the time slot number (sequence group hopping, sequence hopping).

[0101] For example, for a low PAPR sequence for PUCCH, the sequence group number u = f gh +f ss The mod 30 and the sequence number v within the sequence group depend on the higher layer parameters (pucch-GroupHopping). gh Based on the higher layer parameters (pucch-GroupHopping), it can also be based on the time slot number n in the radio frame s,f μ and frequency hopping index n hop .f ss Can also be n ID mod 30. n IDIt is assigned by the high-level parameter (hoppingId). v is based on the high-level parameter (pucch-GroupHopping) and can also be based on n s,f μ and n hop In f gh , a pseudo-random sequence is used in the calculation of v.

[0102] The cyclic shift α may also be based on the symbol number (cyclic shift hopping).

[0103] For example, for low PAPR sequences used for PUCCH, the cyclic shift α is based on n s,f μ , initial cyclic shift m0, and the value corresponding to 0 or HARQ-ACK information, namely m CS and OFDM symbol number l+l'.

[0104] In distributed MIMO technology, it is unclear what sequence to use for UL or DL ​​signals. If an appropriate sequence cannot be used, there is a concern that the increase in communication throughput will be suppressed.

[0105] Therefore, the inventors of the present invention have conceived of a method of using an appropriate sequence when using the distributed MIMO technology.

[0106] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Each embodiment can be applied independently or in combination.

[0107] In this disclosure, "A / B" and "at least one of A and B" may be used interchangeably. In this disclosure, cell, CC, carrier, BWP, and band may be used interchangeably. In this disclosure, index, ID, indicator, and resource ID may be used interchangeably. In this disclosure, RRC parameters, higher layer parameters, RRC information elements (IEs), and RRC messages may be used interchangeably.

[0108] (Wireless Communication Method)

[0109] <First embodiment>

[0110] The inventors of the present invention came up with the first embodiment based on the fact that the physical distance between antenna points in an antenna group is large and the signal from each antenna point may be phase shifted.

[0111] A different TCI state may be set for each antenna point. In other words, the UE may be configured with a separate TCI state for each antenna point (e.g., a different TCI state). Furthermore, in the present disclosure, the term "TCI state" may be interchangeable with at least one of the following: DL TCI state, UL TCI state, unified TCI state, spatial relationship, QCL, QCL assumption, and QCL type.

[0112] For example, the UE can also be configured with a TCI state for each antenna point. That is, different TCI state settings can be supported for multiple antenna points. Furthermore, the UE can also be configured with a TCI state for each (set of) multiple antenna points.

[0113] In addition, the UE may also be assumed to be set with a specific QCL type (for example, QCL type D) in units of antenna groups. For example, the UE may also be assumed to be the same at least between antenna points in the same CDM (Code Division Multiplexing) group (for example, between antenna points that perform antenna point multiplexing in at least one of the code domain, the spatial domain, and the beam domain), and receive the demodulation reference signal (DeModulation Reference Signal (DMRS)) corresponding to the CDM group. In addition, the UE may also be assumed to be the same other than the specific type between antenna points in different CDM groups (for example, between antenna points that perform antenna point multiplexing in at least one of the time domain and the frequency domain), and receive the DMRS corresponding to the CDM group.

[0114] In addition, in the present disclosure, CDM group, group, CORESET, PDSCH, codeword, antenna port group (e.g., DMRS port group), reference signal group, CORESET group, etc. can also be replaced with each other. In addition, antenna group and TRP can also be replaced with each other.

[0115] The TCI state (QCL) for the above-mentioned antenna point can also be set through high-layer signaling (e.g., RRC signaling), physical layer signaling (e.g., DCI), or a combination thereof. For example, the QCL for one or more antenna points can also be semi-statically set through RRC signaling. In addition, the QCL for one or more antenna points can also be selected through MAC CE from those semi-statically set through RRC signaling. The QCL for one or more antenna points can also be selected through MAC CE from those semi-statically set through RRC signaling, and further selected through DCI from those selected through MAC CE.

[0116] According to the method for setting the TCI state (QCL) in the first embodiment described above, communication can be performed appropriately even when the physical distance between antenna points is large.

[0117] Furthermore, at least one of the UE and the NW may independently perform signal processing (e.g., precoding) for each antenna point included in an antenna group. At least one of the UE and the NW is required to perform transmission and reception processing based on antenna points with different phases within the antenna group. To this end, it is preferable to understand the channel state (including phase differences) between the UE and each antenna point.

[0118] For example, the UE may also transmit an UL Reference Signal (RS) (e.g., SRS), and the NW may also perform Channel State Information (CSI) measurements based on this reference signal. In this case, the NW can appropriately measure the channel including the phase difference between each antenna point.

[0119] Furthermore, for example, when performing CSI measurements using a DL RS, the UE can also perform CSI measurements based on a new CSI codebook that takes into account the phase difference of signals between antenna points. In other words, the UE can also perform signal processing of DL signals received from each antenna point based on this newly defined codebook. For example, the UE can also refer to a codebook for a single panel and perform CSI measurements on multiple panels, assuming that one panel corresponds to one antenna point. Furthermore, the multiple panels can also be incoherent.

[0120] In addition, in the present disclosure, CSI may be measured for each antenna point, for each antenna port, for each antenna group, or for each of multiple antenna groups.

[0121] According to the CSI measurement method in the first embodiment described above, appropriate communication can be performed in consideration of the phase difference between antenna points.

[0122] <Second embodiment>

[0123] The following describes the relationship between antenna points and an antenna group composed of one or more antenna points. The number of antenna points constituting the antenna group shown in the following description is only an example and is not limited to this.

[0124] The UE may also assume that the antenna points are associated with the antenna group based on a certain rule. The rule may also be specified in the specification in advance. For example, X (X is an arbitrary natural number) antenna points may be used as a unit of an antenna group, and X may also be specified in the specification. For example, Figure 7AAs shown, an antenna group can also be formed with every four antenna points.

[0125] Furthermore, the UE may also associate antenna points with antenna groups (performing at least one of notification, configuration, updating, activation, and deactivation) via higher-layer signaling, physical-layer signaling, or a combination thereof. In this case, flexible communication control corresponding to the distribution of multiple UEs, traffic volume, and the like is possible.

[0126] For example, Figure 7B As shown, the association between antenna points and antenna groups can also be updated via higher layer signaling, physical layer signaling, or a combination thereof.

[0127] Furthermore, the antenna points included in the antenna group may not be continuous. For example, the antenna points included in the antenna group may be notified to the UE via a bitmap.

[0128] In addition, the number (ID, index) of the antenna point can also be a local number within each antenna group. Figure 8A As shown in the example, the antenna point numbers can be set in ascending order within each antenna group (in this case, #0 to #3). In addition, the antenna point numbers can be common to each antenna group. In this case, the antenna point numbers constituting different antenna groups can be common or different. For example, Figure 8B As in the example shown, the same antenna point number (in this case, #0) may be set.

[0129] Additionally, in the present disclosure, ascending order may also be replaced by descending order.

[0130] Furthermore, the association between the antenna point corresponding to (equivalent to) a physical antenna element (or a set of multiple physical antenna elements) and the antenna port of the signal processing unit may also be set (or specified or indicated). Figure 9 As in the example shown, numbers may be set that associate each antenna point included in the first and second antenna groups with the antenna port of the signal processing unit.

[0131] The association between antenna points, antenna ports, and antenna groups may also be notified to the UE in an explicit manner through higher layer signaling, physical layer signaling, or a combination thereof.

[0132] For example, the association between antenna points, antenna ports, and antenna groups may also be notified to the UE through higher layer signaling (eg, RRC signaling, MAC CE).

[0133] In addition, regarding the association between antenna points, antenna ports, and antenna groups, multiple associations may be notified to the UE through higher-layer signaling (for example, RRC signaling, MAC CE). The UE may also determine one association from the multiple associations through DCI. The DCI may also be a DCI for a scheduling control channel / shared channel, or may be specified as an indication field related to the association between antenna points, antenna ports, and antenna groups. The size of the indication field may also be Ceil(log2(M)) bits. At this time, M may also be the number of candidates notified to the UE through higher-layer signaling (or the number of the above-mentioned associations set to the UE). In addition, Ceil(X) in the present disclosure may also represent a rounding-up function of X.

[0134] In addition, the UE may also determine the association between antenna points, antenna ports, and antenna groups in an implicit manner.

[0135] For example, regarding the association between antenna points, antenna ports, and antenna groups, the UE may also make an implicit judgment based on the physical resources of the DCI (or the PDCCH that transmits the DCI). The physical resources of the DCI may also be at least one of the time resources, frequency resources, control channel element (CCE) index, search space index, control resource set (CORESET) index, and aggregation level of the DCI. For example, the UE may also assume that the following number is the remainder after further dividing the value of the CCE index (or the value of the aggregation level, or the value obtained by dividing the CCE index by the aggregation level) by a certain integer as a value related to the association between the antenna points, antenna ports, and antenna groups indicated by the NW.

[0136] Furthermore, for example, the UE may also assume that the antenna points, antenna ports, and antenna groups for data scheduling based on the DCI are determined based on the association between antenna points, antenna ports, and antenna groups in the DCI. For example, the UE may also assume that the association between antenna points, antenna ports, and antenna groups in the DCI and the association between antenna points, antenna ports, and antenna groups for data scheduling based on the DCI are common. Furthermore, for example, the UE may also apply a transformation to the association between antenna points, antenna ports, and antenna groups in the DCI to determine the association between antenna points, antenna ports, and antenna groups for data scheduling based on the DCI.

[0137] In addition, for example, the UE may also assume that the antenna point, antenna port, and antenna group for data scheduling based on the DCI are determined based on the TCI state of the DCI (or the PDCCH that transmits the DCI).

[0138] The association between antenna points and antenna groups described in the second embodiment may be the same or different for the uplink and downlink. Furthermore, this association may be configured, activated, or determined for each channel or reference signal, or may be configured, activated, or determined commonly for multiple channels or reference signals.

[0139] According to the second embodiment, the UE can perform appropriate communication based on the association between antenna points, antenna ports, and antenna groups.

[0140] <Third embodiment>

[0141] The UE may also determine the sequence (specific sequence) to be used in the signal (specific signal) transmitted or received using the antenna point (antenna port) / antenna group based on the parameter (specific parameter). The UE and the base station may also generate the specific sequence based on the specific parameter.

[0142] The specific signal can be a demodulation reference signal (DMRS) of at least one of the UL data channel (e.g., PUSCH), UL control channel (e.g., PUCCH), DL data channel (e.g., PDSCH), and DL control channel (e.g., PDCCH), or a DL-RS and a UL-RS. The DL-RS can also be at least one of the SS / PBCH blocks (PSS, SSS), CSI-RS, and DMRS. The UL-RS can also be at least one of the SRS and DMRS.

[0143] The specific sequence can be a sequence of a specific signal, a base sequence used in a specific signal, or an OCC (at least one of a time domain OCC and a frequency domain OCC) used in a specific signal. The specific sequence can also be based on an initial value (e.g., c init ), sequence group number, sequence number (reference sequence number), cyclic shift index used in a specific signal (for example, initial cyclic shift index), and at least one index of the OCC index (index associated with a specific sequence, specific index).

[0144] The specific parameter may also be at least one of the following.

[0145] Cell ID (physical cell ID, virtual cell ID).

[0146] ·Values ​​set by high-level parameters.

[0147] Index of a time (time domain) resource. A time resource may also be at least one of a time slot, a subframe, a frame, a symbol, and a subslot.

[0148] Frequency (frequency domain) resource index. A frequency resource may also be at least one of a subcarrier, a resource element (RE), a physical resource block (PRB), a physical resource block group (PRG), a bandwidth part (BWP), a bandwidth (BW), or a band.

[0149] A value corresponding to at least one of an antenna point and an antenna group.

[0150] In the present disclosure, antenna points, virtual antenna points, virtual antenna ports, pseudo antenna points, pseudo antenna ports, virtual RS points, virtual RS ports, pseudo RS points, and pseudo RS ports may also be replaced with each other.

[0151] Furthermore, the UE may also assume that the antenna points / ports actually used in MIMO transmission constitute pseudo antenna points / ports (also referred to as virtual antenna points / ports). Virtual antenna points / ports may include only antenna points / ports within an antenna group or may include antenna points / ports across multiple antenna groups. Furthermore, virtual antenna points / ports used for a particular multi-antenna transmission may also constitute a virtual antenna group.

[0152] The UE and the NW may also associate antenna ports with each antenna point within the antenna group. In addition, the network may also notify the UE of information related to the antenna points / ports actually used in MIMO transmission using higher layer signaling, physical layer signaling, or a combination thereof.

[0153] In addition, the virtual antenna point / port may also be equivalent to an antenna point / port activated based on higher layer signaling, physical layer signaling, or a combination thereof.

[0154] Furthermore, each antenna point (or each virtual antenna point) within an antenna group (or virtual antenna group) may transmit the same data, or may independently perform signal processing and transmit the data.

[0155] The specific sequence may be determined by at least one of the following sequence determination methods 1 to 4.

[0156] Sequence Determination Method 1

[0157] A specific sequence may be determined (generated) for each antenna point (antenna port). The specific sequence may also depend on the antenna point. The specific sequence (specific index) may also be different between multiple antenna points. The sequence generation unit may also be the antenna point.

[0158] exist Figure 10 In the example of , antenna points #0 and #1 are included in the first antenna group, and antenna points #2 and #3 are included in the second antenna group.

[0159] Different specific sequences are used for specific signals in the same time slot between antenna points #0-#3. In this example, sequence hopping in time slot units is applied to the specific sequences corresponding to each antenna point. i,j is the index associated with a specific sequence. i is the index corresponding to the antenna point. j is the time slot number. i,j Instead of time slots, the unit of sequence hopping can also be other time resources such as subframes, subslots, and symbols.

[0160] This method allows a UE or base station to separate specific sequences and signals for each antenna point. This improves communication quality and reliability. The UE or base station can more accurately measure at least one of the received quality and received power for each antenna point. Because the same time and frequency resources can be allocated to multiple antenna points, resource utilization efficiency for measurement can be improved.

[0161] Sequence Decision Method 2

[0162] A specific sequence may be determined (generated) for each antenna group. The specific sequence may also depend on the antenna group. The specific sequence (specific index) may also be different between multiple antenna groups. The sequence generation unit may also be the antenna group.

[0163] exist Figure 11 In the example, the structures of the first antenna group and the second antenna group are the same as Figure 10 same.

[0164] Different specific sequences are used for specific signals in the same time slot between the first antenna group and the second antenna group. In this example, sequence hopping in time slot units is applied to the specific sequences corresponding to the antenna groups. i,j is the index associated with a specific sequence. i is the index corresponding to the antenna group. j is the time slot number. i,j Instead of time slots, the unit of sequence hopping can also be other time resources such as subframes, subslots, and symbols.

[0165] This method allows a UE or base station to separate specific sequences and signals for each antenna group. This improves communication quality and reliability. The UE or base station can more accurately measure at least one of reception quality and received power for each antenna group. Because the same time and frequency resources can be allocated to multiple antenna groups, resource utilization efficiency for measurements can be improved.

[0166] Sequence Decision Method 3

[0167] A specific sequence may be determined (generated) for each sequence generation unit consisting of multiple antenna groups. A sequence generation unit may be a region containing multiple antenna groups, a fixed number of antenna groups, or all antenna groups. The specific sequence may also depend on the sequence generation unit. The specific sequence (specific index) may also differ between multiple sequence generation units.

[0168] exist Figure 12 In the example, the structures of the first antenna group and the second antenna group are the same as Figure 10 The sequence generation unit includes a first antenna group and a second antenna group.

[0169] In all antennas within one sequence generation unit, the same specific sequence is used for the specific signal in the same time slot. In this example, sequence hopping in time slot units is applied to the specific sequence. i,j is an index related to a specific sequence. i is an index corresponding to a sequence generation unit. j is a time slot number. i,j Instead of time slots, the unit of sequence hopping can also be other time resources such as subframes, subslots, and symbols.

[0170] According to this method, when a specific sequence is determined for each area, the distance between two areas using the same sequence can be increased compared to embodiments 1 and 2, and the orthogonality of the specific sequences can be efficiently used to reduce inter-cell (area) interference.

[0171] Sequence Decision Method 4

[0172] OCC can also be applied across multiple antenna points (antenna ports) or multiple antenna groups.

[0173] When the same specific sequence is used simultaneously across multiple antenna points within an antenna group, the OCC across multiple antenna points (antenna point directions, antenna point regions) within the antenna group may be multiplied by the specific sequence. Alternatively, multiple antenna points within the antenna group may correspond to multiple elements of the OCC.

[0174] like Figure 13A As shown, a specific sequence may be generated for each antenna group in the same manner as in Embodiment 2. The specific sequence of each antenna point i in the antenna group may be multiplied by the element n corresponding to the antenna point i in the OCC. i The length of the OCC may also be the number of antennas in an antenna group. When the number of antennas in an antenna group is 2, the length of the OCC is 2, and two OCCs with OCC index p = {0, 1} may also be used.

[0175] An OCC of length 2 can also be Figure 13BThe two [n0, n1] shown.

[0176] When the same specific sequence is used simultaneously across multiple antenna points within multiple antenna groups, the OCC across multiple antenna points (antenna point directions, antenna point regions) within the multiple antenna groups may be multiplied by the specific sequence. Alternatively, multiple antenna points within the multiple antenna groups may each correspond to multiple elements of the OCC.

[0177] like Figure 14A As shown, similarly to Embodiment 3, a specific sequence may be generated for each of two antenna groups. The specific sequence of each antenna point i in the two antenna groups may be multiplied by the element n corresponding to the antenna point i in the OCC. i The length of the OCC may also be the number of antennas in the two antenna groups. When the number of antennas in one antenna group is 2, the length of the OCC across the two antenna groups is 4, and four OCCs with OCC index p = {0, 1, 2, 3} may also be used.

[0178] When the same specific sequence is used simultaneously across multiple antenna groups, the OCC across multiple antenna groups (antenna group directions, antenna group areas) may be multiplied by the specific sequence. Alternatively, multiple antenna groups may correspond to multiple elements of the OCC.

[0179] An OCC of length 4 can also be Figure 14B The four [n0, n1, n2, n3] are shown. P can also be an OCC index.

[0180] OCC can also be generated using cyclic shifts. Figure 15 As shown, when the sequence length of the OCC is 3, three OCCs with OCC index p={0, 1, 2} may be used. The three OCCs may also have cyclic shifts of {0, 2π / 3, 4π / 3} for the OCC with OCC index 0.

[0181] A pseudo-orthogonal sequence (pseudo-random sequence, PN sequence) may be used instead of the OCC.

[0182] According to this method, when the same specific sequence is used among multiple antenna points or multiple antenna groups, specific signals can be orthogonalized.

[0183] (Wireless Communication System)

[0184] The following describes a configuration of a wireless communication system according to an embodiment of the present disclosure. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof.

[0185] Figure 16This figure shows an example of a schematic configuration of a wireless communication system according to one embodiment. The wireless communication system 1 may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP) or the fifth generation mobile communication system New Radio (5G NR).

[0186] In addition, the wireless communication system 1 can also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0187] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0188] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0189] The wireless communication system 1 may also include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) that are deployed within the macrocell C1 and form small cells C2 that are narrower than the macrocell C1. User terminals 20 may also be located within at least one of the cells. The configuration and number of cells and user terminals 20 are not limited to those shown in the figure. Hereinafter, when not distinguishing between base stations 11 and 12, they are collectively referred to as base stations 10.

[0190] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0191] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (below 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to these. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0192] Furthermore, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

[0193] Multiple base stations 10 can also be connected by wired (for example, optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (for example, NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 equivalent to the upper station can also be called an integrated access backhaul (IAB) donor, and the base station 12 equivalent to the relay station (relay) can also be called an IAB node.

[0194] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0195] The user terminal 20 may also be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0196] In the wireless communication system 1, a radio access scheme based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), or single carrier frequency division multiple access (SC-FDMA) may be used.

[0197] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0198] As downlink channels, the wireless communication system 1 may use a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20), a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc.

[0199] In addition, as uplink channels, the wireless communication system 1 can also use an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20), an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc.

[0200] User data, higher-layer control information, and system information blocks (SIBs) are transmitted via the PDSCH. User data, higher-layer control information, and the like can also be transmitted via the PUSCH. Furthermore, the Master Information Block (MIB) can also be transmitted via the PBCH.

[0201] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information for at least one of the PDSCH and the PUSCH.

[0202] In addition, the DCI that schedules the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be replaced by DL data, and the PUSCH may also be replaced by UL data.

[0203] In PDCCH detection, a control resource set (CORESET) and a search space can also be used. A CORESET corresponds to the resources for searching for DCI. A search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space settings.

[0204] A search space may also correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in this disclosure may be used interchangeably.

[0205] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also known as hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR) can also be transmitted via the PUCCH. The random access preamble used to establish a connection with a cell can also be transmitted via the PRACH.

[0206] In the present disclosure, downlink, uplink, etc. may be expressed without the word "link." Furthermore, various channels may be expressed without the word "physical" at the beginning.

[0207] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. can also be transmitted. As DL-RS, in the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. can also be transmitted.

[0208] For example, a synchronization signal may be at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SSs (PSS, SSS) and PBCHs (and DMRS for PBCHs) may also be referred to as an SS / PBCH block or an SS block (SSB). Furthermore, SSs and SSBs may also be referred to as reference signals.

[0209] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0210] (Base Station)

[0211] Figure 17 This figure shows an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface (transmission line interface) 140. Furthermore, more than one of each of the control unit 110, the transmitting / receiving unit 120, the transmitting / receiving antenna 130, and the transmission path interface 140 may be provided.

[0212] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0213] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which this disclosure relates.

[0214] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. It may also control transmission and reception, measurement, etc., using the transmission and reception unit 120, the transmission and reception antennas 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting up, releasing, etc.) of communication channels, manage the status of the base station 10, manage radio resources, etc.

[0215] The transceiver unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transceiver circuit, and the like, which are described based on common knowledge in the technical fields involved in this disclosure.

[0216] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0217] The transmitting and receiving antenna 130 can be formed of an antenna described based on common knowledge in the technical field to which this disclosure relates, such as an array antenna.

[0218] The transmitting and receiving unit 120 may also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the aforementioned uplink channel, uplink reference signal, etc.

[0219] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmit beam and a receive beam.

[0220] The sending and receiving unit 120 (sending processing unit 1211) can also perform processing on the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (for example, RLC retransmission control), the Medium Access Control (MAC) layer (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 110 to generate a bit string to be sent.

[0221] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0222] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0223] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received via the transmitting and receiving antenna 130 .

[0224] The transmitting and receiving unit 120 (receiving processing unit 1212) can also apply receiving processing such as analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0225] The transmitting and receiving unit 120 (measuring unit 123) may also perform measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (SINR), signal to noise ratio (SNR)), signal strength (e.g., received signal strength indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0226] The transmission path interface 140 can also send and receive signals (return signaling) between the devices included in the core network 30, other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0227] In addition, the transmitting unit and the receiving unit of the base station 10 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 120 , the transmitting and receiving antenna 130 , and the transmission path interface 140 .

[0228] The control unit 110 may also determine a sequence (e.g., a specific sequence) that depends on at least one of an antenna point and one or more antenna groups. Each of the one or more antenna groups may also include multiple antenna points. The transmitting and receiving unit 120 may also transmit or receive a signal (e.g., a specific signal, a UL channel, a UL-RS, a DL channel, a DL-RS) based on the sequence.

[0229] (User Terminal)

[0230] Figure 18This figure shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Furthermore, more than one of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided.

[0231] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0232] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which this disclosure relates.

[0233] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission, reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals and forward them to the transmission and reception unit 220.

[0234] The transceiver unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, and the like, which are described based on common knowledge in the technical fields involved in this disclosure.

[0235] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit or may be composed of a transmitting unit and a receiving unit. The transmitting unit may also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0236] The transmitting and receiving antenna 230 can be formed of an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0237] The transmitting and receiving unit 220 may also receive the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the aforementioned uplink channel, uplink reference signal, etc.

[0238] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0239] The sending and receiving unit 220 (sending processing unit 2211) can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0240] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0241] In addition, whether or not to apply DFT processing may also be based on the transform precoding setting. For a certain channel (e.g., PUSCH), if transform precoding is activated (enabled), the transmitting / receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the aforementioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting / receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the aforementioned transmission processing without performing DFT processing.

[0242] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0243] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 230 .

[0244] The transmitting and receiving unit 220 (receiving processing unit 2212) can also apply receiving processing such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0245] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to received signals. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signals. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0246] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0247] The control unit 210 may also determine a sequence (e.g., a specific sequence) that depends on at least one of an antenna point and one or more antenna groups. Each of the one or more antenna groups may also include multiple antenna points. The transceiver unit 220 (transceiver) may also transmit or receive signals (e.g., specific signals, UL channels, UL-RS, DL channels, DL-RS) based on the sequence.

[0248] The sequence may also be based on an index (e.g., a specific index) of at least one of an initial value, a sequence group number, a sequence number, a cyclic shift index, and an orthogonal cover code index. The index may also depend on at least one of the antenna point and the one or more antenna groups.

[0249] The index may also be based on at least one of a cell ID, a higher layer parameter, a time resource index, and a frequency resource index.

[0250] When the same sequence is used among multiple antenna points in one or more antenna groups, multiple elements of the orthogonal cover code may correspond to the multiple antenna points, and the corresponding elements of the orthogonal cover code may be multiplied by the sequence.

[0251] (Hardware Structure)

[0252] In addition, the block diagrams used in the description of the above embodiments show blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, by wired, wireless, etc.) and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0253] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, resolving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any of them are as described above, and the implementation method is not particularly limited.

[0254] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 19 This figure shows an example of the hardware configuration of a base station and a user terminal according to one embodiment. The base station 10 and user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[0255] In addition, in this disclosure, the terms such as device, circuit, equipment, section, and unit are interchangeable. The hardware structure of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or may exclude some of the devices.

[0256] For example, although only one processor 1001 is shown, multiple processors may be provided. Furthermore, processing may be performed by a single processor, or by two or more processors simultaneously, sequentially, or using other methods. Furthermore, processor 1001 may be implemented using more than one chip.

[0257] Regarding the various functions in the base station 10 and the user terminal 20, for example, they are achieved by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0258] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a computing device, registers, etc. For example, at least a portion of the aforementioned control unit 110 (210) and the transmitting and receiving unit 120 (220) may also be implemented by the processor 1001.

[0259] In addition, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and performs various processes based on them. As a program, a program that causes a computer to perform at least a portion of the operations described in the above embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks can also be implemented similarly.

[0260] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other appropriate storage medium. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program code), software modules, etc. for implementing the wireless communication method according to an embodiment of the present disclosure.

[0261] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, or a key drive), a magnetic stripe, a database, a server, or other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0262] The communication device 1004 is hardware (a transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. To implement at least one of frequency division duplex (FDD) and time division duplex (TDD), the communication device 1004 may also include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like. For example, the aforementioned transmitting and receiving unit 120 (220), transmitting and receiving antenna 130 (230), and the like may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be implemented by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0263] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to the outside (e.g., a display, speaker, light emitting diode (LED) lamp, etc.). Alternatively, the input device 1005 and the output device 1006 may be integrated (e.g., a touch panel).

[0264] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0265] Furthermore, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and may use such hardware to implement part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware components.

[0266] (Variation)

[0267] In addition, the terms described in this disclosure and the terms required for understanding this disclosure may also be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be replaced with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, or may be referred to as a pilot, pilot signal, etc. depending on the applied standard. In addition, a component carrier (CC) may also be referred to as a cell, frequency carrier, carrier frequency, etc.

[0268] A radio frame can also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) that constitute a radio frame can also be called a subframe. Furthermore, a subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) that is independent of the parameter set (numerology).

[0269] Here, a parameter set may also refer to communication parameters applied to at least one of the transmission and reception of a signal or channel. For example, a parameter set may also represent at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0270] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. Furthermore, a time slot may also be a time unit based on a parameter set.

[0271] A time slot may also contain multiple mini-slots. Each mini-slot may also consist of one or more symbols in the time domain. Furthermore, a mini-slot may also be referred to as a sub-slot. A mini-slot may also consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using mini-slots may also be referred to as PDSCH (PUSCH) mapping type B.

[0272] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units used for signal transmission. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective equivalents. Furthermore, the terms frame, subframe, time slot, mini-time slot, and symbol may be used interchangeably in this disclosure.

[0273] For example, a subframe can be called a TTI, multiple consecutive subframes can be called a TTI, and a slot or a mini-slot can be called a TTI. That is, at least one of a subframe and a TTI can 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. Furthermore, the unit representing a TTI can be called a slot, a mini-slot, or the like, rather than a subframe.

[0274] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communications. For example, in the LTE system, a base station schedules each user terminal by allocating radio resources (such as the frequency bandwidth and transmit power available to each user terminal) in TTI units. The definition of TTI is not limited to this.

[0275] The TTI may also be a unit of time for transmitting channel-coded data packets (transport blocks), code blocks, code words, etc., and may also be a unit of processing for scheduling, link adaptation, etc. Furthermore, when a TTI is given, the time interval (e.g., the number of symbols) to which the transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.

[0276] In addition, when a time slot or a mini-time slot is called a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-time slots) can also be the minimum time unit for scheduling. In addition, the number of time slots (mini-time slots) that constitute the minimum time unit for scheduling can also be controlled.

[0277] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini-slot, a subslot, a time slot, etc.

[0278] In addition, long TTI (for example, normal TTI, subframe, etc.) can also be replaced by TTI with a time length exceeding 1ms, and short TTI (for example, shortened TTI, etc.) can also be replaced by TTI with a TTI length smaller than long TTI and greater than 1ms.

[0279] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it may also include one or more consecutive subcarriers (subcarriers). The number of subcarriers included in an RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0280] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks.

[0281] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0282] 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.

[0283] A Bandwidth Part (BWP) (also referred to as a fractional bandwidth) can also represent a subset of contiguous common resource blocks (RBs) used for a particular parameter set within a particular carrier. Common RBs can also be identified by their index relative to the common reference point of the carrier. PRBs can also be defined within a BWP and numbered within that BWP.

[0284] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured within one carrier.

[0285] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive specific signals / channels outside of the activated BWP. In addition, the terms "cell," "carrier," and the like in this disclosure may be replaced with "BWP."

[0286] The above-mentioned structures of radio frames, subframes, slots, mini-slots, and symbols are merely examples. For example, various modifications may be made to the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots within a slot, the number of symbols and RBs within a slot or mini-slot, the number of subcarriers within an RB, the number of symbols within a TTI, the symbol length, and the cyclic prefix (CP) length.

[0287] Furthermore, the information and parameters described in this disclosure may be expressed as absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may be indicated by specific indexes.

[0288] The names used for parameters, etc. in this disclosure are not intended to be limiting in any respect. Furthermore, the mathematical formulas for these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not intended to be limiting in any respect.

[0289] Information, signals, and the like described in this disclosure may also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like that may be referred to throughout the foregoing description may also be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0290] Furthermore, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0291] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or appended. Output information, signals, etc. may also be deleted. Input information, signals, etc. may also be sent to other devices.

[0292] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI))), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0293] In addition, physical layer signaling may also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as RRC message, for example, RRC Connection Setup message, RRC Connection Reconfiguration message, etc. In addition, MAC signaling may also be notified using MAC Control Element (CE), for example.

[0294] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0295] The determination can be made by a value represented by a bit (0 or 1), a true or false value (Boolean value) represented by true (true) or false (false), or by comparison of numerical values ​​(for example, comparison with a specific value).

[0296] Whether software is called software, firmware, middleware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software module, application, software application, software package, routine, sub-routine, object, executable file, execution thread, procedure, function, etc.

[0297] Furthermore, software, instructions, information, and the like may also be transmitted and received via a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and a wireless technology (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0298] The terms "system" and "network" used in this disclosure can be used interchangeably. "Network" may also refer to devices included in the network (eg, base stations).

[0299] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)" "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" can be used interchangeably.

[0300] In this disclosure, terms such as "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP))", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" are used interchangeably. In some cases, a base station may be referred to as a macro cell, small cell, femto cell, or pico cell.

[0301] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entire coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within that coverage area.

[0302] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (UE)”, and “terminal” can be used interchangeably.

[0303] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client, or several other appropriate terms.

[0304] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Furthermore, at least one of the base station and the mobile station may also be a device mounted on a mobile object, a mobile object itself, etc. The mobile object may be a means of transportation (e.g., a vehicle, an aircraft, etc.), a mobile object that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0305] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by communication between multiple user terminals (for example, which may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be configured such that the user terminal 20 has the functions of the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0306] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0307] In the present disclosure, actions are assumed to be performed by a base station, and sometimes, depending on the circumstances, by its upper node. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (for example, a Mobility Management Entity (MME)), a Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0308] The various methods / implementations described in this disclosure may be used individually or in combination, and may be switched between them during execution. Furthermore, the processing procedures, sequences, flow charts, and the like of the various methods / implementations described in this disclosure may be reversed as long as they do not conflict. For example, the elements of various steps described in this disclosure are presented in an illustrative order, but are not limited to the specific order presented.

[0309] The various modes and embodiments described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG)) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future Generation Radio Access (FX), Global System for Mobile Communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (Ultra Mobile Broadband), and other technologies. Broadband (UMB)), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB)), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems based on these. In addition, multiple systems can also be combined for application (for example, LTE or LTE-A, combination with 5G, etc.).

[0310] The phrase “based on” used in this disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on.”

[0311] Any reference to an element using the designations "first," "second," etc., as used in this disclosure, does not necessarily limit the quantity or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to a first and a second element does not necessarily imply that only two elements may be used, or that the first element must in some way take precedence over the second element.

[0312] The term "determining" as used in this disclosure may encompass a variety of actions. For example, "determining" may also include judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), ascertaining, etc. as performing a "determination."

[0313] In addition, "judgment (decision)" can also be a situation where receiving (for example, receiving information), transmitting (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. are regarded as making a "judgment (decision)".

[0314] Furthermore, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, comparing, etc. can be considered as "judgment (decision)". In other words, "judgment (decision)" can also refer to situations where certain actions can be considered as "judgment (decision)".

[0315] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and so on.

[0316] The “maximum transmit power” recorded in the present disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0317] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between the two elements being "connected" or "coupled." The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be replaced by "access."

[0318] In the present disclosure, when two elements are connected, it is possible to consider them being "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0319] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other." Alternatively, the term may also mean "A and B are each different from C." Terms such as "separate" and "bound" may also be interpreted in the same way as "different."

[0320] When the terms "include," "including," and variations thereof are used in this disclosure, these terms, like the term "comprising," have an inclusive meaning. Furthermore, the term "or" used in this disclosure does not mean an exclusive OR.

[0321] In the present disclosure, when an article is added by translation, such as a, an, and the in English, the present disclosure may also include a case where the noun following the article is in a plural form.

[0322] While the inventions disclosed herein have been described in detail above, it will be apparent to those skilled in the art that the inventions disclosed herein are not limited to the embodiments described herein. The inventions disclosed herein can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the claims. Therefore, the descriptions in this disclosure are for illustrative purposes only and are not intended to limit the inventions disclosed herein in any way.

Claims

1. A terminal comprising: a control unit that determines a first sequence of a first sounding reference signal (SRS) corresponding to a first TRP of a plurality of transmission / reception points (TRPs) based on a value corresponding to the first TRP, and determines a second sequence of a second SRS corresponding to a second TRP based on a value corresponding to a second TRP of the plurality of TRPs; and The sending unit sends the first SRS based on the first sequence and the second SRS based on the second sequence, where the first sequence is the sequence of the first SRS and the second sequence is the sequence of the second SRS.

2. A wireless communication method for a terminal, comprising: The step of determining a first sequence of a first sounding reference signal (SRS) corresponding to a first TRP of a plurality of transmission / reception points (TRPs) based on a value corresponding to the first TRP, and determining a second sequence of a second SRS corresponding to a second TRP based on a value corresponding to a second TRP of the plurality of TRPs; and The step of transmitting the first SRS based on the first sequence and the second SRS based on the second sequence, wherein the first sequence is the sequence of the first SRS and the second sequence is the sequence of the second SRS.

3. A base station comprising: A plurality of transmission and reception points TRP, including a first TRP and a second TRP; and A receiving unit uses the first TRP and the second TRP to receive a first measurement reference signal SRS based on a first sequence and a second SRS based on a second sequence, wherein the first sequence is based on a value corresponding to the first TRP of the multiple TRPs, and the second sequence is based on a value corresponding to the second TRP of the multiple TRPs, the first sequence is a sequence of the first SRS, and the second sequence is a sequence of the second SRS.

4. A system comprising a terminal and a base station, The terminal has: a control unit that determines a first sequence of a first sounding reference signal (SRS) corresponding to a first TRP of a plurality of transmission / reception points (TRPs) based on a value corresponding to the first TRP, and determines a second sequence of a second SRS corresponding to a second TRP based on a value corresponding to a second TRP of the plurality of TRPs; and a sending unit, sending the first SRS based on the first sequence and the second SRS based on the second sequence, The first sequence is a sequence of the first SRS, the second sequence is a sequence of the second SRS, and the base station has: The first SRS and the second SRS are received using the first TRP and the second TRP.

Images