Terminal, wireless communication method, base station and system

Abstract

The invention relates to a terminal, a wireless communication method, a base station and a system. A terminal is provided with: a reception unit that receives, using a media access control element (MAC CE), information relating to the order of transition of one or more transmission setting instruction states (TCI states); and a control unit that controls reception of a downlink channel on the basis of the MAC CE and downlink control information (DCI), the DCI including information for indicating a transition of the TCI state.

Description

[0001] This application is a divisional application of a patent application with the application date of February 27, 2020 and the application number 202080097691.5 and the invention name “Terminal, wireless communication method and base station”. Technical Field

[0002] The present disclosure relates to a terminal, a wireless communication method, a base station, and a system in a next generation mobile communication system. Background Art

[0003] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) is standardized for the purpose of further high-speed data rate, low latency, etc. (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) is standardized for the purpose of further increasing the capacity and sophistication of LTE (Release (Rel.) 8, 9 of the Third Generation Partnership Project (3GPP)).

[0004] The successor systems of LTE (for example, 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.

[0005] Prior art literature

[0006] Non-patent literature

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

[0008] Problems to be solved by the invention

[0009] In NR after Rel.17, research is underway to expand regional coverage by using distributed MIMO (Multi-Input Multi-Output) based on millimeter wave (mmWave) in communications between user terminals (user terminal, User Equipment (UE)) and networks (Network (NW), such as base stations).

[0010] In the distributed MIMO technology adopted after Rel. 17, no research has been conducted on how to realize MIMO transmission using multiple antenna points. If this is not clear, there is a concern that the increase in communication throughput will be suppressed.

[0011] In addition, in future wireless communication systems (for example, NR after Rel.17), in order to realize wireless communication in a high-speed moving object (for example, a train, etc.), it is envisaged to use a beam transmitted from a transmission point (for example, an antenna point, an antenna group) configured on the path of the moving object.

[0012] However, how to control wireless communication in a mobile object using beams transmitted from various transmission points has not been fully studied.

[0013] 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 control wireless communication in a mobile body even when the distributed MIMO technology is effectively utilized.

[0014] Means for solving problems

[0015] A terminal of one embodiment of the present invention comprises: a receiving unit, which utilizes a media access control element MAC CE to receive information related to the order of migration of one or more transmission setting indication states, i.e., TCI states; and a control unit, which controls the reception of a downlink channel based on the MAC CE and downlink control information DCI, wherein the DCI includes information for indicating the migration of the TCI states.

[0016] Effects of the Invention

[0017] 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

[0018] Figure 1 This is a diagram showing an example of SFN in a tunnel.

[0019] 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.

[0020] Figure 3A as well as Figure 3B This is a diagram showing an example of the configuration of antennas arranged around a base station.

[0021] Figure 4 This is a diagram showing an example of communication based on the antenna structure (1).

[0022] Figure 5 This is a diagram showing an example of communication based on the antenna structure (2).

[0023] Fig. 6A as well as Figure 6B This is a diagram showing an example of communication based on the antenna structure (2).

[0024] Figure 7 This is a diagram showing an example of transition of the correspondence relationship between antenna points and antenna groups inside a building as UE included in the HST moves.

[0025] Figure 8 This is a diagram showing an example of transition of the correspondence relationship between antenna points and antenna groups inside a building as UE included in the HST moves.

[0026] Fig. 9A as well as Fig. 9B This is a diagram showing an example of information on the transition order of a set of one or more antenna points and the transition order of one or more antenna groups.

[0027] Fig. 10A as well as Fig. 10B This is a diagram showing an example of information on the number of transitions per unit time of a set of one or more antenna points and the number of transitions per unit time of one or more antenna groups.

[0028] Figures 11A-11D This is a diagram showing an example of information on the number of transitions per unit time of a set of one or more antenna points and the number of transitions per unit time of one or more antenna groups.

[0029] Fig.12 This is a diagram showing an example of information related to the interval between each transmission point.

[0030] Fig.13A as well as Fig. 13B This is a diagram showing an example of a method for estimating the moving speed of a UE included in the HST.

[0031] Fig.14 This is a diagram showing an example of a method for estimating the moving speed of a UE included in the HST.

[0032] Fig.15 This is a diagram showing an example of a method in which the NW estimates the moving speed of the UE.

[0033] Fig.16A as well as Fig. 16B This is a diagram showing an example of QCL settings accompanying the migration of antenna points / antenna groups.

[0034] Fig.17A as well as Fig. 17B This is a diagram showing an example of QCL settings accompanying the migration of antenna points / antenna groups.

[0035] Fig.18A as well as Fig.18B This is a diagram showing an example of QCL settings accompanying the migration of antenna points / antenna groups.

[0036] Fig.19 This is a diagram showing an example of the correspondence between antenna groups and cell IDs when antenna points / antenna groups shift over time.

[0037] Fig. 20 This is a diagram showing an example of the correspondence between antenna groups and sequence hopping patterns when antenna points / antenna groups are shifted with time.

[0038] Fig.21 This is a diagram showing an example of the correspondence between antenna groups and cell IDs when antenna points / antenna groups shift over time.

[0039] Fig.22A as well as Fig. 22B This is a diagram showing an example of information related to transition of antenna groups and cell IDs.

[0040] Fig.23 This is a diagram showing an example of the correspondence between antenna groups and cell IDs when antenna points / antenna groups shift over time.

[0041] Fig.24 This is a diagram showing an example of an antenna group that follows the movement of a UE included in an HST.

[0042] Fig.25 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0043] Fig.26 This is a diagram showing an example of the structure of a base station involved in one embodiment.

[0044] Fig. 27 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0045] Fig.28This is a diagram showing an example of the hardware configuration of a base station and a user terminal involved in one embodiment. DETAILED DESCRIPTION

[0046] In the subsequent systems of LTE (for example, the fifth generation mobile communication system (5G), 5G+ (plus), and New Radio (NR)), wireless communication methods using millimeter waves are introduced. In Rel.15NR, hybrid beamforming (for example, beam management) based on massive MIMO is introduced, and in Rel.16NR, distributed MIMO (multiple TRPs) is introduced, thereby seeking to improve the communication speed and reliability of the downlink shared channel (PDSCH).

[0047] In NR after Rel.17, we expect to see improvements in communication speed and reliability of channels other than the downlink shared channel (PDSCH) based on distributed MIMO (multi-TRP). In addition, in NR after Rel.17, we expect to see improvements in beam management in scenarios using high-speed moving trains and other mobile objects (HTS (High Speed ​​Train)).

[0048] However, the above-mentioned improvements in communication speed and reliability are of a best effort type and are applied in limited areas.

[0049] In the subsequent systems of NR (for example, also referred to as 5G+, 6G, etc.), compared with the above-mentioned 5G, further requirements are placed on high data rate / capacity, wide coverage, low energy / cost, low latency, ultra-reliability, multi-connection, etc. In addition, in the present disclosure, "A / B" may also mean "at least one of A and B".

[0050] With the above-mentioned 6G requirements, we expect a shift from best-effort communications to quality-assured communications. In addition, we expect high-speed / ultra-reliable communications to be expanded to be used in all regions, rather than being limited to certain regions.

[0051] There are many issues in wireless communication methods using millimeter waves. For example, there are concerns about the increase in propagation loss due to the increase in communication distance, the increase in loss outside the field of view (non-line of sight) due to the high straightness of radio waves, the difficulty in implementing high-order SU-MIMO (Single User MIMO) due to the small number of multipaths, and the increase in device installation density due to the increase in device size.

[0052] In the LTE system, a single frequency network (SFN) using multiple small antennas in a building (e.g., a tunnel, a building, etc.), each antenna having the same cell ID, is operated. The so-called SFN is a method of simultaneously transmitting the same signal in the same physical resource block (PRB) using multiple antennas, and the UE receiving the signal assumes that the signal is transmitted from one point.

[0053] Figure 1 FIG. 1 is a diagram showing an example of a SFN in a tunnel. Figure 1 For example, a large antenna is set outside the tunnel (for example, near the tunnel entrance), and a small antenna is set inside the tunnel. The large antenna may also be, for example, an antenna with a transmission power of about 1-5W. The small antenna may also be, for example, an antenna with a transmission power of about 250mW. The large antenna may also send downlink (DL) signals to and from the tunnel, and the small antenna may also send DL signals inside the tunnel. The large antenna may also be switched 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 the example are just an example, and the present invention is not limited to this example. In addition, the SFN in the tunnel may be replaced by an IMCS (In-building Mobile Communication System).

[0054] In addition, in the present disclosure, "transmission of DL signals in the antenna" may also be replaced by "reception of uplink (UL) signals in the antenna". Furthermore, "reception of DL signals in the UE" may also be replaced by "transmission of UL signals in the UE".

[0055] In order to expand the area where distributed MIMO using millimeter waves can be flexibly applied, a method of spreading multiple antenna points is being studied. Figure 2A The method shown is to ensure a high-speed, ultra-reliable area by starting with a low-frequency base station with a wider coverage area and spreading multiple high-frequency antennas with a narrower coverage area.

[0056] 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.

[0057] The multiple antennas can be installed not only outdoors but also on the ceiling / wall indoors. For example, they can be installed near indoor lighting sources. In this case, there is a high possibility that multiple UEs indoors will be within the field of view, which can reduce propagation loss.

[0058] Figure 2A is a diagram showing an example of configuring multiple antennas around a base station. Figure 2A Although such a method of spreading antenna points can be implemented at a low cost, it is difficult to optimize the efficiency of resource utilization, and there is a problem that the propagation loss increases if the distance between high-frequency antennas is extended.

[0059] On the other hand, in order to expand the area where distributed MIMO using millimeter waves can be flexibly used, a method of extending part of the base station function to the vicinity of the high-frequency antenna is also being studied. This method is similar to the method of configuring multiple transmission / reception points (Transmission / Reception Point (TRP)) around the base station.

[0060] Figure 2B FIG. 4 is a diagram showing an example of configuring a plurality of TRPs around a base station. Figure 2B Such a method of extending multiple TRPs to the vicinity 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 through the flexible use of optical fibers, etc.

[0061] In addition, in the present disclosure, an "antenna point" may also mean an "antenna corresponding to (equivalent to) a physical antenna element", "an antenna corresponding to (equivalent to) a plurality of physical antenna elements (physical antenna elements)". In addition, an antenna port may also mean an "antenna as a signal processing unit composed of one or more antenna points", "a signal processing unit corresponding to one or more antenna points", "a logical entity corresponding to a signal output from one or more antenna points", etc. In addition, an "antenna group" may also mean "a plurality of antennas composed of one or more antenna points", "a plurality of antennas composed of one or more antenna ports".

[0062] 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.

[0063] In addition, in the present disclosure, "antenna group" may also be interchanged with "antenna group", "antenna set", "high frequency antenna group", "high frequency antenna group", "high frequency antenna set", etc. In addition, the antenna group may also be a plurality of antenna points physically connected by wires (e.g., leaky coaxial cables, etc.).

[0064] As a method of spreading multiple antenna points to expand the area where distributed MIMO using millimeter waves is used, two structures are being studied.

[0065] One is like Figure 3A In this way, a structure is being studied in which a high-frequency antenna is connected with a wire or the like and extends continuously in a certain direction (antenna structure (1)). In the case of this antenna structure, although the structural cost can be suppressed, it is believed that the antenna loss becomes greater near the antenna farther from the base station.

[0066] Another is Figure 3B In this way, a structure in which a part of the antenna is relayed (for example, using optical fiber, IAB, etc.) is being studied (antenna structure (2)). In the case of this antenna structure, antenna loss can be suppressed even for antennas that are relatively far away from the base station.

[0067] In the case of antenna structure (1), the same signal can also be sent from all antenna points. If there is a UE near any of the multiple high-frequency antenna points, DL communication can be performed on the UE. In this case, the NW does not need to identify which antenna the UE is near, so the overhead can be suppressed. However, if the same transmission signal is sent from all antenna points, the frequency utilization efficiency of the venue is degraded.

[0068] Figure 4 FIG. 1 is a diagram showing an example of communication based on the antenna structure (1). Figure 4 In the example, the DL signal to UE1 is sent from the high frequency antenna. In this case, UE1 near the high frequency antenna can communicate. The transmission signal to UE1 from the high frequency antenna far from the base station contributes little to improving the reception signal to UE1. Therefore, for UE2 and the like near the high frequency antenna, it is preferred to flexibly use frequency resources.

[0069] In order to solve the problem of the above 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 send an independent transmission signal to each antenna group.

[0070] Figure 5 is a diagram showing an example of communication based on the antenna structure (2). Figure 5In that way, 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.

[0071] In addition, Figure 5 In the example structure, the base station has the function of scheduling for each antenna group, can perform relaying for each antenna group (for example, relaying based on optical fiber extension, etc.), and can also have part of the function of the base station for each antenna group.

[0072] In antenna configuration (2), the same DL signal / reference signal (ReferenceSignal (RS)) may be sent from each antenna group. In addition, in antenna configuration (2), the same (common) DL signal / RS may be sent from a part of the antenna groups, and different DL signals / RS may be sent from other antenna groups.

[0073] Fig. 6A as well as Figure 6B is a diagram showing an example of communication based on the antenna structure (2). Fig. 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, a DL signal 1 for UE1 is sent in the first antenna group, and a DL signal 2 for UE2 is sent in the second antenna group.

[0074] (TCI, spatial relationship, QCL)

[0075] In NR, research is being conducted to control the reception processing (for example, at least one of reception, demapping, demodulation, and decoding) and transmission processing (for example, 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 (Transmission Configuration Indication state (TCI state)).

[0076] The TCI state may also represent an element of a signal / channel applied to a downlink. The element equivalent to the TCI state of a signal / channel applied to an uplink may also be expressed as a spatial relation.

[0077] The so-called TCI state is information related to Quasi-Co-Location (QCL) of signals / channels, and may also be called spatial reception parameters, spatial relationship information, etc. The TCI state may also be set for the UE per channel or per signal.

[0078] In addition, in the present disclosure, the TCI state may be interchangeable with at least one of a DL TCI state, a UL TCI state, a unified TCI state, a spatial relationship, a QCL, a QCL relationship, a QCL assumption, and a QCL type.

[0079] The so-called QCL is an indicator of the statistical properties of a signal / channel. For example, it can also be expressed that when a certain 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 parameter (for example, spatial Rx parameter) is the same among these different multiple signals / channels (at least one of them is QCL).

[0080] In addition, the spatial reception parameter may also correspond to the reception beam of the UE (eg, reception analog beam), and the beam may also be determined based on the spatial QCL. The QCL (or at least one element in the QCL) in the present disclosure may also be replaced by sQCL (spatial QCL).

[0081] Regarding QCL, multiple types (QCL types) may also be specified. For example, four QCL types AD may be set, and the parameters (or parameter sets) that can be assumed to be the same in the four QCL types AD are different. The parameters (also referred to as QCL parameters) are expressed as follows:

[0082] QCL Type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread;

[0083] QCL type B (QCL-B): Doppler shift and Doppler spread;

[0084] QCL type C (QCL-C): Doppler shift and average delay;

[0085] QCL type D (QCL-D): spatial reception parameters.

[0086] 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. This situation can also be called QCL assumption.

[0087] 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.

[0088] The TCI state may be, for example, information related to the QCL between the channel being the object (in other words, the reference signal (RS) used for the channel) and other signals (for example, other RS). The TCI state may also be set (indicated) by high-layer signaling, physical layer signaling, or a combination thereof.

[0089] 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.

[0090] MAC signaling may also use, for example, MAC Control Element (MAC CE), MAC Protocol Data Unit (MAC Protocol Data Unit (PDU)), etc. Broadcast information may also be, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), Other System Information (Other System Information (OSI)), etc.

[0091] The physical layer signaling may be, for example, downlink control information (DCI).

[0092] 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)).

[0093] In addition, the RS that is in 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).

[0094] The SSB is a signal block including at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)), a secondary synchronization signal (Secondary Synchronization Signal (SSS)), and a broadcast channel (Physical Broadcast Channel (PBCH)). The SSB may also be referred to as an SS / PBCH block.

[0095] The information element of the TCI state set by high-level signaling ("TCI-state IE" of RRC) 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.

[0096] 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.

[0097] When TRS RS is set as QCL type A, it is assumed that TRS is different from the demodulation reference signal (DMRS) of PDCCH or PDSCH, and the same TRS is periodically transmitted for a long time. UE can measure TRS and calculate average delay, delay spread, etc.

[0098] In the TCI state of the DMRS of the PDCCH or PDSCH, the UE in which the TRS is set as the RS of QCL type A can assume that the DMRS of the PDCCH or PDSCH is the same as the parameters of QCL type A of the TRS (average delay, delay spread, etc.), and thus can obtain the parameters of type A of the DMRS of the PDCCH or PDSCH (average delay, delay spread, etc.) based on the measurement result of the TRS. When performing channel estimation of at least one of the PDCCH and the PDSCH, the UE can use the measurement result of the TRS to perform more accurate channel estimation.

[0099] A UE to which a QCL type D RS is set can determine a UE reception beam (spatial domain reception filter, UE spatial domain reception filter) using the QCL type D RS.

[0100] The RS of QCL type X in the TCI state may also mean an RS that has 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.

[0101] (HST)

[0102] In NR, in order to communicate with a terminal (hereinafter also referred to as UE) included in a moving object such as a high-speed train (HTS (High Speed ​​Train)), it is envisaged to use a beam transmitted from a transmitting point (or transmitting point, for example, an antenna point, an antenna group).

[0103] When the moving object moves at high speed, it is assumed that it is difficult to appropriately perform control such as beam steering and switching inside a structure (for example, inside a tunnel).

[0104] The beam control of the existing system (for example, before Rel.15) is performed through the process of L1-RSRP reporting, beam notification (TCI state, spatial relation setting, or activation), and receiving beam determination.

[0105] The handover control is performed, for example, through the procedures of measurement report (L3-RSRP, L3-SINR report), handover instruction, random access channel transmission, and RRC connection completion.

[0106] When handover is performed during communication of a UE included in an HST inside a structure, communication may be disabled or communication quality may be significantly degraded. Therefore, it is desirable to perform communication by avoiding handover at least inside a structure.

[0107] In order to avoid switching, it is considered to construct an SFN based on the same cell ID inside the structure. However, in this case, the entire structure becomes a single cell, and the cell capacity is reduced, so there is a concern that phase offset and synchronization offset will occur between each transmission point (for example, antenna point).

[0108] Thus, how to control wireless communication in a moving object using beams transmitted from each transmission point within a structure has not been fully studied. If the control method is not clear, the increase in communication throughput may be suppressed.

[0109] Therefore, the inventors of the present invention have conceived a method for appropriately performing wireless communication in a moving object inside a structure using a distributed MIMO technology using a plurality of antenna points.

[0110] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The structures described in each embodiment may be applied individually or in combination.

[0111] In the present disclosure, a moving body may be any moving body that moves at a speed higher than a certain speed, for example, a train, a car, a motorcycle, a ship, etc. In addition, communication between a UE included in the moving body and a transmission point (for example, an antenna point, an antenna group) may be performed directly between the UE and the transmission point, or between the UE and the transmission point via the moving body (for example, an antenna provided on the moving body, etc.).

[0112] (Wireless Communication Method)

[0113] In each embodiment of the present disclosure, it is assumed that one or more antenna points and at least one of the one or more antenna groups inside the structure communicate with the UE included in the HST. In the present disclosure, the number of antenna points included in each antenna group may also be one or more. In addition, the number of antenna points included in each antenna group may be notified to the UE communicating with the antenna point and at least one of the antenna groups, or may not be notified.

[0114] In addition, in the present disclosure, the UE included in the HST may also be referred to as UE. In addition, in the present disclosure, one or more antenna points and one or more antenna groups inside a structure are described, but the present disclosure can also be applied to one or more antenna points and one or more antenna groups outside a structure.

[0115] In addition, in the present disclosure, an example in which the number of antenna points constituting one antenna group is four is mainly shown, but the number of antenna points constituting one antenna group is just an example and is not limited to this.

[0116] <First embodiment>

[0117] In this embodiment, a method of migrating the correspondence between one or more antenna points and one or more antenna groups arranged on a movement path inside a building as a UE included in an HST moves will be described.

[0118] In addition, in the present disclosure, "migration" can also be replaced with "change", "update", "switch", "valid (enable)", "invalid (disable)", "activate", "deactivate", "activate / deactivate", etc.

[0119] [Migration of the correspondence between antenna points and antenna groups]

[0120] The correspondence (or correspondence relationship, association) between one or more antenna points and one or more antenna groups may also be migrated in units of antenna points. In other words, the UE may also assume that the correspondence between one or more antenna points and one or more antenna groups is migrated in units of antenna points.

[0121] Specifically, the correspondence between one or more antenna points and one or more antenna groups may be shifted every certain number (for example, M (M is an arbitrary integer)) of antenna points every time a certain shift unit time elapses.

[0122] In the present disclosure, M may also be notified to the UE through high-layer signaling, physical layer signaling, or a combination thereof. In addition, the UE may also calculate M based on the moving speed of the UE. At this time, when the moving speed of the UE is greater than a certain threshold, M may also be greater, and when the moving speed of the UE is less than a certain threshold, M may also be smaller. In addition, the calculation of the moving speed of the UE will be described later in the second embodiment.

[0123] In addition, in the present disclosure, the migration unit time (t n -t n-1 ) can be an integer multiple of a certain time resource (for example, code element, time slot, sub-time slot, subframe, wireless frame) or Tms (T is an arbitrary value).

[0124] Figure 7 1 is a diagram showing an example of the transition of the correspondence between antenna points and antenna groups within a structure as the UE included in the HST moves. Figure 7 As shown, at time t0, antenna points #0-#3 correspond to the m(t0)th antenna group (m is an arbitrary integer), at time t1, antenna points #1-#4 correspond to the m(t1)th antenna group, and at time t2, antenna points #2-#5 correspond to the m(t2)th antenna group.

[0125] In addition, Figure 7 In the example, from time t0 to t2, the correspondence between antenna points and antenna groups changes, but at this time, the cell IDs set to the m(t)th antenna group at any time t can also be equal. Figure 7 In FIG. 1 , a case where M=1 is shown, but the value of M is not limited thereto. In addition, the cell ID set in the antenna group will be described later in the fourth embodiment.

[0126] In addition, the correspondence between one or more antenna points and one or more antenna groups may be migrated in units of antenna groups. In other words, the UE may also assume that the correspondence between one or more antenna points and one or more antenna groups is migrated in units of antenna groups.

[0127] Specifically, the correspondence between one or more antenna points and one or more antenna groups may be shifted every certain number (eg, M' (M' is an arbitrary integer)) of antenna points every time a certain shift unit time elapses.

[0128] In the present disclosure, M' may also be notified to the UE through high-layer signaling, physical layer signaling, or a combination thereof. In addition, the UE may also calculate M' based on the moving speed of the UE. At this time, when the moving speed of the UE is greater than a certain threshold, M' may also be greater, and when the moving speed of the UE is less than a certain threshold, M' may also be smaller.

[0129] Figure 8 1 is a diagram showing an example of the transition of the correspondence between antenna points and antenna groups within a structure as the UE included in the HST moves. Figure 8 As shown in the example, at time t0, antenna points #0-#3 correspond to the m(t0)th antenna group (m is an arbitrary integer), and antenna points #4-#7 correspond to the m+1(t0)th antenna group. In addition, at time t1, antenna points #0-#3 correspond to the m-1(t1)th antenna group (m is an arbitrary integer), and antenna points #4-#7 correspond to the m(t1)th antenna group.

[0130] In addition, Figure 8 In the example, from time t0 to t2, the correspondence between antenna points and antenna groups changes, but at this time, the cell IDs set in the m(t)th antenna group at any time t can also be equal. Figure 7 , M'=1 is shown, but the value of M' is not limited to this.

[0131] [Instructions / notification of migration order and migration number]

[0132] The UE may also explicitly receive information related to the migration order of the corresponding relationship between the antenna points and the antenna groups through high-layer signaling, physical layer signaling, or a combination thereof. In addition, the UE may also implicitly determine the migration order of the corresponding relationship between the antenna points and the antenna groups through high-layer signaling, physical layer signaling, or a combination thereof.

[0133] The UE may also receive information related to at least one of a migration order of a set of more than one antenna point and a migration order of more than one antenna group. The information may also be notified through higher layer signaling.

[0134] Fig. 9A The diagram shows an example of information on the migration order of a set of one or more antenna points and the migration order of one or more antenna groups. The UE may also control the transmission and reception of signals / channels for the antenna points and antenna groups based on the information.

[0135] In addition, the UE receives Fig. 9A After the multiple information is shown, at least one of the MAC CE and the DCI may be used to notify (instruct) which of the multiple information to use, or the judgment may be made implicitly.

[0136] Fig. 9B is a diagram showing an example of information related to the migration order of a set of one or more antenna points and the migration order of one or more antenna groups. The UE can also receive the DCI Fig. 9B The information shown is obtained, and based on the information, the migration order of one or more sets (tables) of antenna points and the migration order of one or more antenna groups are determined (judged).

[0137] In addition, the UE may also receive information on at least one of the number of migrations per unit time of a set of one or more antenna points and the number of migrations per unit time of one or more antenna groups. This information may also be notified through higher layer signaling.

[0138] Fig. 10A This is a diagram showing an example of information on the number of transitions per unit time of a set of one or more antenna points and the number of transitions per unit time of one or more antenna groups. The UE may also control the transmission and reception of signals / channels for the antenna points and antenna groups based on this information.

[0139] In addition, the UE receives Fig. 10A After the multiple information is shown, at least one of the MAC CE and the DCI may be used to notify (instruct) which of the multiple information to use, or the judgment may be made implicitly.

[0140] Fig. 10B This is a diagram showing an example of information related to the number of migrations per unit time of a set of one or more antenna points and the number of migrations per unit time of one or more antenna groups. Fig. 10B The information shown is obtained, and based on the information, the number of transitions per unit time of a set of one or more antenna points and the number of transitions per unit time of one or more antenna groups are determined (judged).

[0141] In addition, the UE may also receive multiple information related to at least one of the migration order of a set of more than one antenna points and the migration order of more than one antenna group, and switch to use the multiple information based on the moving speed of the UE. In addition, the UE may also receive multiple information related to at least one of the number of migrations per unit time of a set of more than one antenna points and the number of migrations per unit time of more than one antenna group, and switch to use the multiple information based on the moving speed of the UE. The multiple information may also be notified through high-layer signaling.

[0142] Fig.11A is a diagram showing an example of information related to the number of transitions per unit time of a set of one or more antenna points. The UE may also select a Fig. 11BOne of the multiple information shown in the example is used, and the transmission and reception of signals / channels for antenna points and antenna groups are controlled based on the one information.

[0143] also, Fig. 11B is a diagram showing an example of information related to the number of migrations per unit time of one or more antenna groups. The UE may also select a Fig. 11B One of the multiple information shown in the example is used, and the transmission and reception of signals / channels for antenna points and antenna groups are controlled based on the one information.

[0144] The UE may also decide which of the low speed and high speed to use based on a certain threshold. The threshold may be pre-defined in the specification or notified to the UE through high-layer signaling. Fig.11A as well as Fig. 11B In the example shown, the case where the speed is divided into two types, low speed and high speed, is described, but the speed division method (or speed level) may be two or more.

[0145] In addition, the UE receives Fig.11A as well as Fig. 11B After the multiple information is shown, at least one of the MAC CE and the DCI may be used to notify (instruct) which of the multiple information to use, or the judgment may be made implicitly.

[0146] Fig. 11C is a diagram showing an example of information related to the number of transitions per unit time of a set of more than one antenna points. Fig. 11C The information shown is obtained, and based on the information, the number of transitions per unit time of a set of more than one antenna points is determined (judged).

[0147] Fig.11D is a diagram showing an example of information related to the number of migrations per unit time of one or more antenna groups. The UE can also receive the DCI Fig.11D The information shown is obtained, and based on the information, the number of transitions per unit time of one or more antenna groups is determined (judged).

[0148] In addition, in the present disclosure, "unit time" may also be "migration unit time". In addition, in the present disclosure, unit time may be an integer multiple of a certain time resource (e.g., symbol, time slot, sub-time slot, sub-frame, radio frame), or Tms (T is an arbitrary value). In addition, in the present disclosure, unit time may be pre-defined by a specification, may be notified to the UE by high-layer signaling, or may be a value reported from the UE to the NW by UE capability information (UE Capability) signaling.

[0149] In addition, the correspondence between antenna points and antenna groups, the migration (change) order, and the number of migrations (changes) per unit time recorded in this embodiment are only examples and are not limited to the values ​​and tables shown in the above examples. In addition, the UE can be explicitly notified of at least one of the migration (change) order and the number of migrations per unit time, and can also be notified of the index corresponding to each of the migration (change) order and the number of migrations per unit time.

[0150] As described above, according to the first embodiment, antenna points and antenna groups can be appropriately configured (reconfigured, set) near a high-speed moving UE, and appropriate communication can be performed. In addition, an antenna group (antenna point) with a certain cell ID can be set near a high-speed moving UE, so that even in the case of a long distance inside a structure, switching can be avoided and appropriate communication can be performed.

[0151] <Second embodiment>

[0152] In this embodiment, a method for estimating the moving speed of the UE included in the HST is described.

[0153] The UE may also determine (judge) the moving speed of the UE by measuring a DL reference signal (RS). In addition, the UE may also communicate with the HST that moves with the UE to receive speed information.

[0154] In the present disclosure, the DL RS may also be referred to as a speed estimation RS, a speed measurement RS, etc. In the present disclosure, the speed estimation RS may be at least one of SSB, CSI-RS, TRS, and DMRS, or a newly defined RS.

[0155] The UE may also receive information related to RS resources for speed estimation through at least one of higher layer signaling and broadcast information.

[0156] The UE may also estimate the speed of the UE by measuring the RS resources for speed estimation in each of the multiple transmission points and performing Doppler estimation. The UE may also estimate the speed of the UE based on the (calculated) Doppler shift (f D ) to determine the speed of the UE. For example, when the Doppler shift is larger (or smaller) than a certain threshold, the UE may also determine the moving speed of the UE as high speed. In addition, when the Doppler shift is smaller (or larger) than a certain threshold, the UE may also determine the moving speed of the UE as low speed.

[0157] In addition, the threshold may be defined in advance by the specification, or may be notified to the UE by higher layer signaling. In addition, in this embodiment, the case where the speed is divided into two types, low speed and high speed, is described, but the speed division method (or speed level) may be more than two.

[0158] In addition, in the present disclosure, the Doppler shift (f D ) can be a measured value (instantaneous value) in a measured RS resource or an average value of measured values ​​in multiple transmission points. The number of the multiple transmission points can be pre-specified by the specification or notified to the UE by high-level signaling.

[0159] In addition, in this embodiment, each transmission point may be one or more antenna points or one or more antenna groups.

[0160] The Doppler shift obtained by the UE varies depending on the direction of travel of the mobile body and the direction of the beam transmitted from each transmission point. In the present disclosure, the UE may also receive information related to the direction of the beam transmitted from each transmission point. The UE may also receive the information through high-layer signaling. In this case, the UE may also perform speed estimation (Doppler estimation) based on the received information.

[0161] In addition, the UE may not receive information on the direction of the beam transmitted from each transmission point. In this case, the UE may determine the direction of the beam transmitted from each transmission point based on the result of velocity estimation (Doppler estimation).

[0162] In addition, in the present disclosure, the UE may or may not receive information related to the distances between the plurality of transmission points. The information related to the distances between the plurality of transmission points may also be information related to the intervals between the transmission points. The information related to the intervals between the transmission points may include the physical intervals between the transmission points arranged at equal intervals, or may include the positional relationship between the transmission points (refer to Fig.12 ). In addition, in the present disclosure, the intervals between the transmission points may be constant or different. Fig.12 The values ​​shown are just examples and are not limited to these values.

[0163] Fig.13A This is a diagram showing an example of a method for estimating the moving speed of UE (Doppler estimation) included in HST. Fig.13AThis indicates that transmission points are set along the moving path (or moving direction, traveling direction, driving path) of the moving body, and beams are formed from each transmission point both in the moving direction and in the opposite direction of the moving direction of the moving body. Transmission points that form beams in multiple directions (for example, 2 directions) may also be referred to as bidirectional transmission points.

[0164] like Fig.13A As shown in the example, the result obtained by the Doppler estimation performed by the UE (Doppler shift (f D )) varies according to the moving speed of the UE. D ) with a certain threshold, the UE can also estimate the speed of the UE.

[0165] Fig. 13B This is a diagram showing an example of a method for estimating the moving speed of UE (Doppler estimation) included in HST. Fig. 13B The figure shows that transmission points are set along the moving path of the moving body, and beams are formed from each transmission point in the direction opposite to the moving direction of the moving body. A transmission point that forms a beam in one direction may also be called a uni-directional transmission point.

[0166] exist Fig. 13B In the example shown, the mobile object receives a positive Doppler shift (+f D ).

[0167] In addition, here, the case where the beam is formed in the opposite direction of the moving direction of the moving body is shown, but the present invention is not limited to this, and the beam may be formed in the moving direction. In this case, the moving body receives a negative Doppler shift (-f D ).

[0168] like Fig. 13B As shown in the example, the result obtained by the Doppler estimation performed by the UE (Doppler shift (f D )) varies according to the UE's moving speed. The UE can also use the Doppler shift (f D ) is compared with a certain threshold to estimate the speed of the UE.

[0169] In addition, the UE may also measure the RS resources for speed estimation in each of the multiple transmission points, and measure the received signal (RS) power, thereby estimating the speed of the UE. The UE may also determine the speed of the UE based on the period of received signal power change obtained by the received signal power measurement. For example, when the period of received signal power change is smaller than a certain threshold, the UE may also determine the moving speed of the UE to be high speed. In addition, when the period of received signal power change is larger than a certain threshold, the UE may also determine the moving speed of the UE to be low speed. In addition, the threshold may be defined in advance through specifications, or may be notified to the UE through high-layer signaling.

[0170] In addition, in the present disclosure, received signal power may also be replaced by received power, received quality, etc. In addition, in the present disclosure, received power may also be, for example, reference signal received power (RSRP), signal to interference plus noise ratio (SINR), signal to noise ratio (SNR), etc. In addition, in the present disclosure, received quality may also be, for example, reference signal received quality (RSRQ), etc.

[0171] In addition, in the present disclosure, the period of change of the received signal power used for UE speed estimation can be either a measured value in a measured RS resource or an average value of measured values ​​in multiple transmission points. The number of the multiple transmission points can be pre-specified by the specification or notified to the UE by high-layer signaling.

[0172] Fig.14 This is a diagram showing an example of a method for estimating the moving speed of a UE (received signal power measurement) included in the HST. Fig.14 The diagram shows a case where transmission points are set along the moving path of the moving object, and beams are formed from each transmission point both in the moving direction and in the opposite direction to the moving direction of the moving object.

[0173] In addition, in the present disclosure, the UE may also receive information about the direction of the beam transmitted from each transmission point. The UE may also receive the information through high-layer signaling. In this case, the UE may also perform speed estimation (received signal power measurement) based on the received information.

[0174] In addition, the UE may not receive information about the direction of the beam transmitted from each transmission point. In this case, the UE may determine the direction of the beam transmitted from each transmission point based on the result of speed estimation (received signal power measurement).

[0175] like Fig.14 As shown in the example, the result (the period of change of the received signal power) obtained by the UE through the received signal power measurement varies according to the moving speed of the UE. The UE can also estimate the speed of the UE by comparing the period of change of the received signal power with a certain threshold.

[0176] In addition, the above-mentioned speed estimation method using Doppler estimation and the speed estimation method using received signal power measurement can be used alone or in combination. By using them in combination, it is possible to estimate the moving speed of the UE with higher accuracy. In addition, the method of whether to apply at least one of the speed estimation method using Doppler estimation and the speed estimation method using received signal power measurement can be notified to the UE or not.

[0177] In addition, the UE may not estimate the moving speed of the UE, and the NW may estimate the moving speed of the UE and send the speed information of the UE to the UE.

[0178] In this case, the NW can also estimate the moving speed of the UE by setting the transmission of the UL signal / channel to the UE and receiving the UL signal / channel transmitted from the UE. In addition, the NW can also set multiple sensors (for example, HST / UE position estimation sensors) and at least one of multiple receiving points in the structure (cell, area), and estimate the moving speed of the UE based on the position information of the UE. In addition, the NW can also communicate with the HST that moves with the UE to receive the speed information of the UE. Then, the UE can also receive the speed information of the UE from the NW.

[0179] In addition, the multiple sensors and the multiple receiving points may be common to the above-mentioned transmission points (antenna points, antenna groups), or may be independent sensors or antenna points (antenna groups) different from the transmission points.

[0180] In addition, the UE may also measure the DL signal / channel transmitted from each transmission point and report the measurement result to the NW. For example, the UE may also perform Doppler estimation in measuring the DL signal / channel and report the Doppler shift (f D ), the change period of Doppler shift (for example, from +f D to +f D Time (period), from -fD to -f D time (cycle), from +f D to -f D Time (period), from -f D to +f D at least one of the time (period)).

[0181] In addition, for example, the UE may also measure the received signal power when measuring the DL signal / channel, and report at least one of the maximum value and minimum value, the difference between the maximum value and the minimum value, the time (period) for changing from the maximum value to the minimum value, the time (period) for changing from the minimum value to the maximum value, the time (period) for changing from the maximum value to the maximum value, and the time (period) for changing from the minimum value to the minimum value in the measurement of the received signal power.

[0182] Fig.15 FIG. 1 is a diagram showing an example of a method in which the NW estimates the moving speed of the UE. Fig.15 As shown, multiple HST / UE position estimation sensors are set inside the structure, and the UE sends UL signals / channels or measurement results (at least one of Doppler estimation results or received power measurement results) to the multiple sensors. The NW estimates the moving speed of the UE based on the information received from the UE and sends the speed information to the UE.

[0183] As described above, according to the second embodiment, it is possible to appropriately estimate the moving speed of a UE moving at high speed.

[0184] <Third Embodiment>

[0185] In this embodiment, the setting of QCL accompanying the migration of the antenna point / antenna group configured in the moving path is described. In addition, in the present disclosure, QCL can also be replaced with at least one of TCI state, DL TCI state, UL TCI state, unified TCI state, spatial relationship, QCL relationship, QCL assumption, and QCL type.

[0186] In the case where the antenna point / antenna group migrates over time, the UE may also assume that the QCL is the same before and after the migration. In addition, in the present disclosure, "the same" of QCL, etc. may also be replaced with "maintained" of QCL, etc., "maintained" of QCL, etc., "valid" of QCL, etc., etc.

[0187] For example, when the antenna point / antenna group migrates over time, the UE may also assume that the QCL is the same at any time including before the migration (for example, time t0) and after the migration (for example, time t1).

[0188] Fig.16A FIG. 1 is a diagram showing an example of QCL settings accompanying the migration of antenna points / antenna groups. Fig.16A As in the example shown, when the antenna group is migrated from time t0 to t1, the UE may assume that the QCL is the same at any time (T) including before the migration (time t0) and after the migration (time t1).

[0189] In addition, for example, when the antenna point / antenna group migrates over time, the UE may assume that the QCL is the same during a period before the migration (eg, time t0) and a period after the migration (eg, time t1).

[0190] Fig. 16B FIG. 1 is a diagram showing an example of QCL settings accompanying the migration of antenna points / antenna groups. Fig. 16B As in the example shown, when the antenna group is migrated from time t0 to t1, the UE may assume that the QCL is the same in the period (t0) including before the migration (time t0) and the period (T1) including after the migration (time t1).

[0191] In addition, when the antenna point / antenna group migrates over time, the UE may also assume that the QCL is different before and after the migration. In addition, in the present disclosure, "different" of QCL, etc. may also be replaced with "not maintained" of QCL, etc., "not maintained" of QCL, etc., "invalid" of QCL, etc., etc.

[0192] For example, when the antenna point / antenna group is migrated over time, the UE may assume that the QCL before the migration (for example, time t0) is maintained during an arbitrary period until after the migration (for example, time t1).

[0193] Fig.17A FIG. 1 is a diagram showing an example of QCL settings accompanying the migration of antenna points / antenna groups. Fig.17A As in the example shown, when the antenna group is migrated from time t0 to t1, the UE may assume that the QCL is the same in any time (T) from before the migration (time t0) to after the migration (time t1).

[0194] In addition, for example, when the antenna point / antenna group migrates over time, the UE may also assume that the QCL is the same for a certain period from before the migration (for example, time t0). In other words, when the antenna point / antenna group migrates over time, the UE may also assume that the QCL is the same for a certain period after the migration at time t0. In addition, in the present disclosure, "a certain period after the migration at time t0" may also be interpreted as "a certain period after measuring (receiving) the DL RS".

[0195] Fig. 17BFIG. 1 is a diagram showing an example of QCL settings accompanying the migration of antenna points / antenna groups. Fig. 17B As in the example shown, when the antenna group is migrated from time t0 to t1, the UE may assume that the QCL is the same during a certain period (t0) from before the migration (time t0).

[0196] Furthermore, the UE may also assume that the QCL set at each antenna point (and at least one of the antenna group, channel, and RS) migrates in time.

[0197] For example, the UE may assume that the measurement value of the signal / channel measured before migration (time t0) is valid until a certain time (eg, time t0+k) and becomes invalid after a certain time (eg, time t0+k).

[0198] In addition, in the present disclosure, the measurement value of the signal / channel "valid" can also be replaced with the measurement value of the signal / channel "usable", the measurement value of the signal / channel "conceivable", etc. In addition, in the present disclosure, the measurement value of the signal / channel "invalid" can also be replaced with the measurement value of the signal / channel "unusable", the measurement value of the signal / channel "unconceivable", etc.

[0199] In addition, for example, the UE may assume that the measurement value of the signal / channel set (notified) before migration (time t0) is valid until a certain time (e.g., time t0+k) and is invalid after a certain time (e.g., time t0+k).

[0200] Fig.18A FIG. 1 is a diagram showing an example of QCL settings accompanying the migration of antenna points / antenna groups. Fig.18A In the example shown in , the UE assumes that the measurement value of the signal / channel (set (notified)) measured at time t0 is valid until time t0+k, and becomes invalid after a certain time t0+k, and controls the sending and receiving of the signal / channel.

[0201] In addition, the UE may also assume that the QCL set at each antenna point (and at least one of the antenna group, channel, and RS) migrates in time and is valid for a certain period. In other words, the UE may also assume that the QCL set at each antenna point (and at least one of the antenna group, channel, and RS) periodically becomes the same at a certain moment.

[0202] For example, the UE may also assume that the measurement value of the signal / channel measured before the migration (time t0) is valid at a certain time (for example, time t0+p, t0+2p, t0+3p, ..., t0+np (n is an arbitrary integer)), and invalid at a time other than a certain time (for example, time t0+p, t0+2p, t0+3p, ..., t0+np (n is an arbitrary integer)). UEs passing near each antenna group at a roughly constant speed receive the same signal / channel at roughly constant intervals, so it is expected to be applied to this situation.

[0203] In addition, for example, the UE may also assume that the measurement value of the signal / channel measured before migration (time t0) is valid at a certain time (for example, time t0+p, t0+2p, t0+3p, ..., t0+np (n is an arbitrary integer)) and a period of ±q before and after it, and is invalid at any time other than a certain time (for example, time t0+p, t0+2p, t0+3p, ..., t0+np (n is an arbitrary integer)) and a period of ±q before and after it.

[0204] In addition, for example, the UE may also assume that the measurement value of the signal / channel set (notified) before migration (time t0) is valid at a certain time (for example, time t0+p, t0+2p, t0+3p, ..., t0+np (n is an arbitrary integer)), and is invalid at any time other than a certain time (for example, time t0+k).

[0205] In addition, for example, the UE may also assume that the measurement value of the signal / channel set (notified) before the migration (time t0) is valid at a certain time (for example, time t0+p, t0+2p, t0+3p, ..., t0+np (n is an arbitrary integer)) and a period of ±q before and after it, and is invalid at any time other than a certain time (for example, time t0+p, t0+2p, t0+3p, ..., t0+np (n is an arbitrary integer)) and a period of ±q before and after it.

[0206] Fig.18B FIG. 1 is a diagram showing an example of QCL settings accompanying the migration of antenna points / antenna groups. Fig.18B As shown in the example, the UE can also assume that the measurement value of the signal / channel (set (notified)) measured at time t0 is valid within the time t0+p, t0+2p, t0+3p, ..., t0+np (n is an arbitrary integer) and the period of ±q before and after, and is invalid at any time other than the time t0+p, t0+2p, t0+3p, ..., t0+np (n is an arbitrary integer) and the period of ±q before and after, and controls the sending and receiving of the signal / channel.

[0207] In addition, the value of a certain period in the present embodiment (for example, at least one of T, t0, t1, k, p, q) may also be notified to the UE through high-layer signaling, physical layer signaling, or a combination thereof. In addition, the value of the certain period may also be pre-specified by the specification. In addition, the value of the certain period may also be determined based on the frequency band (Frequency Range (FR)) and the subcarrier spacing (SubCarrier Spacing (SCS)). In addition, the value of the certain period may be an integer multiple of a certain time resource (for example, a symbol, a time slot, a sub-time slot, a subframe, a wireless frame) or tms (T is an arbitrary value). In addition, the value of the certain period may also be determined based on the value reported from the UE to the NW through UE capability information (UE Capability) signaling.

[0208] According to the present embodiment, it is possible to appropriately set the QCL for the UE accompanying the migration of the antenna point / antenna group, and to perform appropriate communication.

[0209] <Fourth embodiment>

[0210] In this embodiment, the setting of the cell ID and the sequence hopping pattern of the signal / channel for the antenna group accompanying the migration of the antenna point / antenna group arranged on the moving path is described.

[0211] In addition, in the present disclosure, the cell ID may also be replaced with a sequence ID, a virtual cell ID, etc. In addition, in the present disclosure, the sequence hopping mode of the signal / channel may be either a sequence hopping mode of the UL signal / channel or a sequence hopping mode of the DL signal / channel. In addition, in the present disclosure, the sequence of the signal / channel may also be replaced with a sequence of DMRS, a DL RS that determines a parameter (e.g., an initial value) for generating a sequence for data scrambling, a DL RS that determines a parameter (e.g., an initial value) for generating a PN sequence, etc.

[0212] In addition, in this embodiment, an example is mainly shown in which the correspondence between antenna points and antenna groups is transitioned for each antenna point every time a certain transition unit time elapses. However, the number of antenna points (antenna groups) that are transitioned every time a certain transition unit time elapses is not limited to this.

[0213] When the antenna point / antenna group migrates with time, the UE may also assume that the correspondence of the cell ID migrates for each antenna group regarding the correspondence (association) between the antenna group and the cell ID. In addition, when the antenna point / antenna group migrates with time, the UE may also assume that the correspondence of the cell ID migrates for each antenna point regarding the correspondence (association) between the antenna point and the cell ID.

[0214] In this case, the UE may also assume that the correspondence (association) between the antenna group / antenna point and the cell ID migrates (changes) over time. In addition, in this case, the UE may also assume that the spatial position of the (set of) antenna groups / antenna points corresponding to a certain cell ID migrates (changes) over time.

[0215] Fig.19 This is a diagram showing an example of the correspondence between antenna groups and cell IDs when antenna points / antenna groups migrate with time. At time t0, antenna points #0-#3 correspond to the m(t0)th antenna group, at time t1, antenna points #1-#4 correspond to the m(t1)th antenna group, and at time t2, antenna points #2-#5 correspond to the m(t2)th antenna group. At this time, the UE assumes that the cell ID 1 corresponds (is associated) with the m(t0)th antenna group, the m(t1)th antenna group, and the m(t2)th antenna group at each time, and controls the transmission and reception of signals / channels.

[0216] In addition, when the antenna point / antenna group migrates over time, regarding the correspondence (association) between the antenna group and the hopping pattern of the sequence, the UE may also assume that the correspondence of the hopping pattern of the sequence migrates according to each antenna group. In addition, when the antenna point / antenna group migrates over time, regarding the correspondence (association) between the antenna point and the hopping pattern of the sequence, the UE may also assume that the correspondence of the hopping pattern of the sequence migrates according to each antenna point.

[0217] In this case, the UE may also assume that the correspondence (association) between the antenna group / antenna point and the hopping pattern of the sequence migrates (changes) in time. In addition, in this case, the UE may also assume that the spatial position of (a set of) antenna groups / antenna points corresponding to the hopping pattern of a certain sequence migrates (changes) in time.

[0218] Fig. 20 is a diagram showing an example of the correspondence between antenna groups and sequence hopping patterns when antenna points / antenna groups migrate over time. Fig.19 In this case, the sequence hopping pattern is determined according to each cell ID, and the sequence is jumped every certain time (for example, at least one of a symbol, a time slot, or a sub-time slot). In this case, the UE assumes that the mth (t0) antenna group at time t0 is connected to the sequence m. 0，0 Correspondingly, the m(t1)th antenna group at time t1 and sequence m 0，1 Correspondingly, the m(t2)th antenna group at time t2 and sequence m 0，2 Correspondingly, control the sending and receiving of signals / channels.

[0219] In addition, m in this embodiment X，Y(X and Y are arbitrary integers) It may also be a sequence number (index), a cyclic shift (CS) number (index), an orthogonal cover code (OCC) number (index), etc.

[0220] In addition, in the present disclosure, the antenna point may also be referred to as a virtual antenna point, a virtual antenna port, a quasi-antenna point, a quasi-antenna port, a virtual RS point, a virtual RS port, a quasi-RS point, a quasi-RS port, etc.

[0221] In addition, the UE may also be considered to constitute quasi-antenna points / ports (also referred to as virtual antenna points / ports) by using antenna points / ports actually used in MIMO transmission. Virtual antenna points / ports may include only antenna points / ports within an antenna group or may include antenna points / ports across multiple antenna groups. In addition, virtual antenna points / ports used for a certain multi-antenna transmission may also constitute a virtual antenna group.

[0222] The UE and the NW may also make the antenna ports correspond to the antenna points in the antenna group. In addition, the network may also use high-layer signaling, physical layer signaling, or a combination thereof to notify the UE of information related to the antenna points / ports actually used in MIMO transmission.

[0223] In addition, the virtual antenna point / port may also be equivalent to an antenna point / port activated based on high-layer signaling, physical layer signaling, or a combination thereof.

[0224] Furthermore, each antenna point (or each virtual antenna point) within an antenna group (or virtual antenna group) may transmit the same data, or may perform signal processing independently and transmit the data.

[0225] The UE may also assume that the antenna group / antenna point and the cell ID do not correspond one-to-one. In other words, the UE may also assume that the correspondence between a certain cell ID and an antenna group migrates (changes) over time. In addition, regarding the correspondence between a certain cell ID and an antenna group, the UE may also determine that it migrates (changes) over time based on information related to the migration of the antenna group / antenna point and the cell ID.

[0226] Fig.21 This is a diagram showing an example of the correspondence between antenna groups and cell IDs when antenna points / antenna groups migrate with time. At each of time t0 and t1, antenna points #0-#3 correspond to the first antenna group, and antenna points #4-#7 correspond to the second antenna group. At this time, from time t0 to t1, the cell ID migrates from the first antenna group to the second antenna group.

[0227] In addition, information related to the migration of antenna groups / antenna points and cell IDs may be explicitly notified (set) to the UE through high-layer signaling, physical layer signaling, or a combination thereof. Information related to the migration of antenna groups / antenna points and cell IDs may be explicitly notified (set) to the UE through high-layer signaling, or may be set (activated) to multiple UEs through high-layer signaling (e.g., RRC signaling, MAC CE), and selected from the multiple settings through physical layer signaling (e.g., DCI).

[0228] Fig.22A FIG. 1 is a diagram showing an example of information related to the migration of antenna groups and cell IDs. Fig.22A The information shown in the example shows how the antenna group corresponding to a certain cell ID is migrated according to each migration unit time. Fig.22A The information shown in the example is notified to the UE through high-layer signaling, and the UE controls the transmission and reception of the signal / channel based on the information.

[0229] also, Fig. 22B FIG. 1 is a diagram showing an example of information related to the migration of antenna groups and cell IDs. Fig. 22B The information shown in the example shows how the antenna group corresponding to a certain cell ID migrates according to each migration unit time. Fig. 22B The information including multiple migration candidates shown in the example is notified to the UE through high-layer signaling. Further, based on a certain field value (here 2 bits) of the DCI received by the UE, the UE selects a candidate and controls the sending and receiving of the signal / channel.

[0230] In addition, regarding the migration of the antenna group and the cell ID, the UE may make an implicit judgment based on information notified (set) to the UE through broadcast information, high-layer signaling, physical layer signaling, or a combination thereof.

[0231] For example, regarding the migration of the antenna group and the cell ID, the UE may also make an implicit judgment based on the physical resources of the DCI (or the PDCCH transmitting 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 remainder after dividing the value of the CCE index (or the value of the aggregation level) by a certain integer is a value related to the migration of the antenna group and the cell ID indicated from the NW.

[0232] In addition, for example, the UE may also assume that the QCL of data scheduling based on the DCI is determined based on the association of the antenna point, antenna port, and antenna group of the DCI. For example, the UE may also assume that the association of the antenna point, antenna port, and antenna group of the DCI is common to the QCL of data scheduling based on the DCI. In addition, for example, the UE may also assume that the association of the antenna point, antenna port, and antenna group of the DCI is different from the QCL of data scheduling based on the DCI.

[0233] In addition, for example, the UE may also assume that the QCL for data scheduling based on the DCI is determined based on the QCL (TCI state) of the DCI (or the PDCCH that transmits the DCI).

[0234] In addition, the UE may also be conceived that at least one of the antenna point, antenna port, antenna group, cell, and cell ID migrates independently of DL and UL. In other words, the UE may also use at least one of the antenna point, antenna port, antenna group, cell, and cell ID for DL ​​for receiving DL signals / channels, and use at least one of the antenna point, antenna port, antenna group, cell, and cell ID for UL for sending UL signals / channels. In this case, at least one of the DL / UL beam (spatial domain filter), QCL, TPC (Transmission Power Control), and resource allocation may also correspond (be determined) to each cell ID.

[0235] Fig.23 This is a diagram showing an example of the correspondence between antenna groups and cell IDs when antenna points / antenna groups migrate with time. Regarding DL, at time t0, antenna points #0-#3 correspond to the m(t0)th antenna group, at time t1, antenna points #1-#4 correspond to the m(t1)th antenna group, and at time t2, antenna points #2-#5 correspond to the m(t2)th antenna group. On the other hand, regarding UL, at time t0, antenna points #2-#5 correspond to the m(t0)th antenna group, at time t1, antenna points #3-#6 correspond to the m(t1)th antenna group, and at time t2, antenna points #4-#7 correspond to the m(t2)th antenna group.

[0236] In this case, as time passes, the antenna group and the cell ID corresponding to the antenna group migrate in DL and UL. Specifically, for DL, the mth antenna group at each time corresponds to cell ID 1, and for UL, the mth antenna group at each time corresponds to cell ID 2. The UE controls the reception of DL signals / channels and the transmission of UL signals / channels based on the above correspondence.

[0237] In addition, in the present embodiment, the correspondence (association) between the cell ID and at least one of the antenna point, the antenna port, and the antenna group may be one-to-one correspondence or may not be one-to-one correspondence.

[0238] According to this embodiment, for a UE moving at high speed, by appropriately configuring / reconfiguring a cell ID near the UE, it is possible to communicate with a NW using an appropriate cell. In addition, even inside a long-distance tunnel, multiple cells can be allocated to each of multiple UEs, enabling more appropriate communication. In addition, in a tunnel, a long-distance SFN can be constructed without switching.

[0239] <Changes>

[0240] In order to follow the movement of the UE contained in the HST, the UE may also assume that the antenna groups / antenna points move physically (mechanically) in the vicinity of the UE.

[0241] Fig.24 FIG. 1 is a diagram showing an example of an antenna group that follows the movement of a UE included in an HST. Fig.24 In the example shown, the movable antenna group installed inside the structure follows the moving direction of the UE included in the HST. According to this method, the UE can communicate appropriately in the tunnel without performing handover.

[0242] (Wireless Communication System)

[0243] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using any one of the wireless communication methods according to the above-mentioned embodiments of the present disclosure or a combination thereof.

[0244] Fig.25 1 is a diagram showing an example of a schematic structure of a wireless communication system involved in an 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), the fifth generation mobile communication system New Radio (5G NR), and the like.

[0245] 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 (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.

[0246] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0247] 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)).

[0248] The wireless communication system 1 may also include: a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The configuration and number of each cell and the user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.

[0249] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

[0250] 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 this. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0251] Furthermore, in each CC, the user terminal 20 may communicate using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0252] Multiple base stations 10 may also be connected via wired (e.g., optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station may also be referred to as an IAB node.

[0253] 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), a Next Generation Core (NGC), and the like.

[0254] The user terminal 20 may also be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0255] In the wireless communication system 1, a wireless access method based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. may be used.

[0256] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be applied to the UL and DL radio access schemes.

[0257] In the wireless communication system 1, as downlink channels, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)) and the like may be used.

[0258] In addition, in the wireless communication system 1, as uplink channels, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20), an uplink control channel (Physical Uplink Control Channel (PUCCH))), a random access channel (Physical Random Access Channel (PRACH)) and the like may be used.

[0259] The PDSCH is used to transmit user data, high-layer control information, system information block (SIB), etc. The PUSCH is also used to transmit user data, high-layer control information, etc. In addition, the PBCH is also used to transmit the master information block (MIB).

[0260] 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 of at least one of the PDSCH and the PUSCH.

[0261] 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.

[0262] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of 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 setting.

[0263] A search space may also correspond to PDCCH candidates that are consistent with one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be interchangeable.

[0264] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., may also be called hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.) and scheduling request (Scheduling Request (SR)) may also be transmitted through PUCCH. Random access preambles for establishing a connection with a cell may also be transmitted through PRACH.

[0265] In the present disclosure, downlink, uplink, etc. may be expressed without the word “link.” In addition, various channels may be expressed without the word “physical” at the beginning.

[0266] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. In the wireless communication system 1, as DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may also be transmitted.

[0267] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as SS / PBCH block, SS block (SSB), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0268] 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).

[0269] (Base Station)

[0270] Fig.26 1 is a diagram showing an example of a structure of a base station involved in one embodiment. The base station 10 includes a control unit 110, a transmitting and receiving unit 120, a transmitting and receiving antenna 130, and a transmission path interface (transmission line interface) 140. In addition, the control unit 110, the transmitting and receiving unit 120, the transmitting and receiving antenna 130, and the transmission path interface 140 may each be provided with more than one.

[0271] 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 be omitted.

[0272] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on the common knowledge in the technical field to which the present disclosure relates.

[0273] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc. using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be sent as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting, release, etc.) of communication channels, state management of the base station 10, management of wireless resources, etc.

[0274] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the public knowledge in the technical field involved in the present disclosure.

[0275] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured by a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0276] The transmitting / receiving antenna 130 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0277] The transmitting and receiving unit 120 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

[0278] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0279] The sending and receiving unit 120 (sending processing unit 1211), for example, may also perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (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.

[0280] 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.

[0281] The transmitting and receiving unit 120 (RF unit 122 ) may 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 .

[0282] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 130 .

[0283] The sending and receiving unit 120 (receiving processing unit 1212) can also apply 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.

[0284] The transmitting and receiving unit 120 (measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (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 (Reference Signal Received Power (RSRP))), received quality (e.g., reference signal received quality (Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal to noise ratio (Signal to Noise Ratio (SNR))), signal strength (e.g., received signal strength indicator (ReceivedSignal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0285] The transmission path interface 140 can also send and receive signals (return signaling) between 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.

[0286] In addition, the transmitting unit and the receiving unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmitting and receiving unit 120 , the transmitting and receiving antenna 130 , and the transmission path interface 140 .

[0287] The transmitting and receiving unit 120 may also transmit information related to a change in the correspondence between one or more antenna points configured on the moving path and one or more antenna groups formed by the one or more antenna points. The control unit 110 may also control the transmission of at least one of a downlink channel and a reference signal based on the information. The control unit 110 may also control the reception of at least one of an uplink channel and a reference signal based on the information (first, third, and fourth embodiments).

[0288] The transmitting and receiving unit 120 may also transmit a downlink reference signal (DL RS) from one or more antenna points configured on the moving path. The transmitting and receiving unit 120 may also receive a measurement result of at least one of a period of change in the received power of the DL RS resource and a Doppler shift of the DL RS resource (second embodiment).

[0289] (User Terminal)

[0290] Fig. 27 The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. In addition, the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may be provided in one or more pieces.

[0291] In addition, in this example, the functional blocks of the characteristic parts in 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 be omitted.

[0292] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on the common knowledge in the technical field to which the present disclosure relates.

[0293] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission and 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.

[0294] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the public knowledge in the technical field involved in the present disclosure.

[0295] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0296] The transmitting / receiving antenna 230 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0297] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0298] 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.

[0299] 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.

[0300] 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.

[0301] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is activated (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0302] 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 .

[0303] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 230 .

[0304] The sending and receiving unit 220 (receiving processing unit 2212) can also apply 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.

[0305] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to the received signal. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signal. 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.

[0306] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be constituted by at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0307] The transmitting and receiving unit 220 may also receive information related to a change in the correspondence between one or more antenna points configured on the moving path and one or more antenna groups formed by the one or more antenna points. The control unit 210 may also control the reception of at least one of a downlink channel and a reference signal based on the information. The control unit 210 may also control the transmission of at least one of an uplink channel and a reference signal based on the information (first, third, and fourth embodiments).

[0308] The information may include the order of antenna group changes, the number of antenna group changes, the moving speed, the quasi co-location (QCL) corresponding to the antenna group, and at least one of the cell IDs applied to the antenna group (first, third, and fourth embodiments).

[0309] The control unit 210 may judge (determine) the same period of QCL applied to at least one of the downlink channel and the reference signal based on the information (third embodiment).

[0310] The control unit 210 may determine (determine) that the cell IDs applied to the one or more antenna groups are the same (fourth embodiment).

[0311] The transmitting and receiving unit 220 may also receive a downlink reference signal (DL RS) from one or more antenna points arranged on the moving path. The control unit 210 may also measure at least one of a period of change in the received power of the DL RS resource and a Doppler shift of the DL RS resource (second embodiment).

[0312] The transmitting and receiving unit 220 may also receive information indicating measurement of at least one of the cycle of the reception power change and the Doppler shift (second embodiment).

[0313] The transmitting and receiving unit 220 may also receive information related to the distance between the antenna points (second embodiment).

[0314] The control unit 210 may also control reporting of at least one of the period of change in the received power and the Doppler shift. The transmitting and receiving unit 220 may also receive information related to the moving speed from the network (second embodiment).

[0315] (Hardware Structure)

[0316] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block of a functional unit. 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 devices that are physically or logically separated can be directly or indirectly (for example, by wired, wireless, etc.) connected 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.

[0317] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, 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 one of them is as described above, and the implementation method is not particularly limited.

[0318] 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. Fig.28 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0319] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. can be used interchangeably. The hardware structure of the base station 10 and the user terminal 20 can be configured to include one or more devices shown in the figure, or can be configured to exclude some devices.

[0320] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be performed by one processor, or may be performed by two or more processors simultaneously, sequentially, or in other ways. In addition, the processor 1001 may also be implemented by one or more chips.

[0321] The functions of the base station 10 and the user terminal 20 are realized, for example, 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.

[0322] 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, an arithmetic device, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), the sending and receiving unit 120 (220), etc. may also be implemented by the processor 1001.

[0323] In addition, the processor 1001 reads the program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that causes a computer to perform at least a part of the operations described in the above-mentioned 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 in the processor 1001, and the same can be achieved for other functional blocks.

[0324] 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 ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), and other appropriate storage media. 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 codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0325] 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)), a digital versatile disk, a Blu-ray (Blu-ray) (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0326] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) may also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0327] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0328] In addition, the processor 1001, the 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 different buses may be used between the devices.

[0329] In addition, 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), and a field programmable gate array (FPGA), and the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0330] (Variation Example)

[0331] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may also be replaced with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc. depending on the standard applied. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0332] A wireless frame may also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) constituting a wireless frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is not dependent on a parameter set (numerology).

[0333] Here, the parameter set may also refer to a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of the subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, wireless frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, etc.

[0334] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0335] A time slot may also include multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0336] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be interchangeable.

[0337] For example, a subframe may also be referred to as a TTI, a plurality of consecutive subframes may also be referred to as a TTI, and a time slot or a mini time slot may also be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in the existing LTE, or a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may also be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0338] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited to this.

[0339] TTI may also be a transmission time unit for a data packet (transport block), a code block, a code word, etc. that has been channel-coded, and may also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0340] In addition, when a time slot or a mini time slot is called 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 of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can also be controlled.

[0341] 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 time slot, a sub time slot, a time slot, etc.

[0342] In addition, a long TTI (e.g., normal TTI, subframe, etc.) may be replaced by a TTI having a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) may be replaced by a TTI having a TTI length shorter than that of the long TTI and longer than 1 ms.

[0343] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0344] 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, respectively.

[0345] 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.

[0346] In addition, a resource block may be composed of one or more resource elements (RE). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0347] Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, common RBs may also be identified by the index of the RB relative to the common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0348] 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 in one carrier.

[0349] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive a specific signal / channel other than the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0350] In addition, the above-mentioned structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0351] In addition, the information, parameters, etc. described in the present disclosure may be expressed by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, a wireless resource may also be indicated by a specific index.

[0352] In the present disclosure, the names used for parameters, etc. are not limiting in all respects. In addition, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present 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 limiting in all respects.

[0353] Information, signals, etc. described in this disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0354] 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.

[0355] The input and output information, signals, etc. may be stored in a specific location (e.g., a memory), or may be managed using a management table. The input and output information, signals, etc. may be overwritten, updated, or appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0356] 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.

[0357] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (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 an RRC message, such as an RRC connection establishment (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC control element (MACControl Element (CE)).

[0358] 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).

[0359] The determination can be made by a value represented by a bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a specific value).

[0360] Whether software is called software, firmware, middle-ware, 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 modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0361] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when the software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0362] The terms "system" and "network" used in the present disclosure can be used interchangeably. "Network" may also refer to a device (eg, a base station) included in the network.

[0363] 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.

[0364] In the present 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" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, micro-micro cell, and micro-micro cell.

[0365] 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, and each smaller area 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 entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within the coverage area.

[0366] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0367] There are also cases where a mobile station is 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 some other appropriate terminology.

[0368] 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. In addition, at least one of the base station and the mobile station may also be a device carried in a mobile body, a mobile body, etc. The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous driving vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing a communication operation. 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.

[0369] 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 the communication between multiple user terminals (for example, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0370] 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.

[0371] In the present disclosure, the actions are assumed to be performed by the base station, and sometimes by its upper node (uppernode) depending on the situation. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (for example, considering the Mobility Management Entity (MME)), the Serving-Gateway (S-GW), etc., but not limited to these) or a combination thereof.

[0372] The various methods / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, sequences, flow charts, etc. of the various methods / implementations described in this disclosure may be reversed in order as long as they are not contradictory. For example, for the methods described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0373] The various modes / implementations described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 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 (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 expanded based on them. In addition, multiple systems can also be applied in combination (for example, LTE or LTE-A, combination with 5G, etc.).

[0374] The term “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the term “based on” means both “based only on” and “based at least on”.

[0375] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to the first and second elements does not mean that only two elements can be used, or that the first element must take precedence over the second element in some form.

[0376] The term "determining" used in the present disclosure may include a variety of actions. For example, judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database or other data structure), ascertaining, etc. may also be considered as performing "determining".

[0377] In addition, with respect to "judgment (decision)", receiving (for example, receiving information), sending (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. may also be regarded as situations in which "judgment (decision)" is made.

[0378] In addition, as for "judgment (decision)", it is also possible to regard resolving, selecting, choosing, establishing, comparing, etc. as the case of performing "judgment (decision)". In other words, as for "judgment (decision)", it is also possible to regard some actions as the case of performing "judgment (decision)".

[0379] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and so on.

[0380] The “maximum transmit power” recorded in the present disclosure may mean 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).

[0381] The terms "connected", "coupled", or all their variations used in this disclosure mean all direct or indirect connections or combinations between two or more elements, and can include the situation where there are one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The combination or connection between the elements can be physical, logical, or a combination thereof. For example, "connection" can also be replaced by "access".

[0382] In the present disclosure, when two elements are connected, it can be considered that they are "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0383] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same way as "different".

[0384] In the present disclosure, when the terms "include", "including", and variations thereof are used, these terms, like the term "comprising", have an inclusive meaning. Furthermore, the term "or" used in the present disclosure does not mean an exclusive OR.

[0385] In the present disclosure, when an article is added by translation like a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0386] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal having: A receiving unit receives information related to the order of transition of one or more transmission configuration indication states (TCI states) by using a medium access control element (MAC CE); and A control unit controls reception of a downlink channel based on the MAC CE and downlink control information DCI, The DCI includes information for indicating the transition of the TCI state.

2. The terminal according to claim 1, wherein: The control unit determines, based on the DCI, that the QCL applied to the downlink channel is the same during a period including a time before the TCI state is changed and a time after the TCI state is changed.

3. The terminal according to claim 1, wherein: The control unit determines that the cell ID applied to the one or more TCI states is the same before and after the TCI state is changed.

4. A wireless communication method of a terminal, comprising: The step of receiving information related to the order of transition of one or more transmission configuration indication states, namely TCI states, using a medium access control element MAC CE; and Based on the MAC CE and downlink control information DCI, a step of controlling reception of a downlink channel, The DCI includes information for indicating the transition of the TCI state.

5. A base station, comprising: A sending unit, using a medium access control element MAC CE, sends information related to the order of transition of one or more transmission configuration indication states, namely, TCI states; and A control unit controls the transmission of a downlink channel based on the MAC CE and downlink control information DCI, The DCI includes information for indicating the transition of the TCI state.

6. A system comprising a terminal and a base station, The terminal has: A receiving unit receives information related to the order of transition of one or more transmission configuration indication states (TCI states) by using a medium access control element (MAC CE); and A control unit controls reception of a downlink channel based on the MAC CE and downlink control information DCI, The DCI includes information for indicating the transition of the TCI state. The base station has: A sending unit sends the MAC CE and the DCI.

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