CN115176489A - Terminal, wireless communication method, and base station - Google Patents

Abstract

A terminal according to an embodiment of the present disclosure includes: a control unit configured to determine transmission power of a signal for an antenna point included in an antenna group based on a power control parameter associated with the antenna group; and a transmission unit that transmits the signal based on the transmission power. According to one embodiment of the present disclosure, even when the distributed MIMO technique is actually applied, communication can be appropriately performed.

Description

Terminal, wireless communication method, and base station

Technical Field

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

Background

In a Universal Mobile Telecommunications System (UMTS) network, long Term Evolution (LTE) is standardized for the purpose of further high data rate, low latency, and the like (non-patent document 1). In addition, LTE-Advanced (3 GPP rel.10-14) is standardized for the purpose of further large capacity, advanced development, and the like of LTE (Third Generation Partnership Project (3 GPP)) versions (Release (rel.)) 8, 9).

Further, systems subsequent to LTE, such as 5th generation mobile communication system (5G), 5G + (plus), sixth generation mobile communication system (6G), new Radio (NR), 3gpp rel.15 and so on, are also being studied.

Documents of the prior art

Non-patent document

Non-patent document 1:3GPP TS 36.300V8.12.0' Evolved Universal Radio Access (E-UTRA) and Evolved Universal Radio Access Network (E-UTRAN); (ii) an Overall description; stage 2 (Release 8) ", 4 months 2010

Disclosure of Invention

Problems to be solved by the invention

In NR after rel.17, it is studied to expand an area coverage by using millimeter wave (mmWave) distributed MIMO (Multi Input Multi Output) in communication between a User terminal (User terminal, user Equipment (UE)) and a Network (NW), for example, a base station).

In the distributed MIMO technology under study using rel.17 or later, no progress has been made in how to control transmission power. Specifically, studies on a transmission power control method of UL/DL are insufficient. If this control is not clear, an increase in communication throughput may be suppressed.

Therefore, an object of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately perform communication even when the distributed MIMO technique is actually applied.

Means for solving the problems

A terminal according to an aspect of the present disclosure includes: a control unit configured to determine transmission power of a signal for an antenna point included in an antenna group based on a power control parameter associated with the antenna group; and a transmission unit that transmits the signal based on the transmission power.

Effects of the invention

According to one embodiment of the present disclosure, even when the distributed MIMO technique is actually applied, communication can be appropriately performed.

Drawings

Fig. 1 is a diagram showing an example of SFN in a tunnel.

Fig. 2A and 2B are diagrams showing an example in which a plurality of antennas or a plurality of TRPs are arranged in the periphery of a base station.

Fig. 3A and 3B are diagrams illustrating an example of the configuration of an antenna disposed around a base station.

Fig. 4 is a diagram showing an example of communication by the antenna configuration (1).

Fig. 5 is a diagram showing an example of communication by the antenna configuration (2).

Fig. 6A and 6B are diagrams showing an example of communication by the antenna configuration (2).

Fig. 7A and 7B are diagrams showing an example of association between antenna points and antenna groups.

Fig. 8A and 8B are diagrams showing an example of association between antenna points and antenna groups.

Fig. 9 is a diagram showing an example of association between antenna points, antenna ports, and antenna groups.

Fig. 10 is a diagram showing an example of determination of transmission power when transmission power control is performed for each antenna point/port.

Fig. 11 is a diagram showing an example of determination of transmission power in the case where transmission power control is performed for each antenna group.

Fig. 12 is a diagram showing an example of determination of transmission power in the case where transmission power control is performed for each of a plurality of (all) antenna groups.

Fig. 13 is a diagram illustrating an example of UL beam control for UL signals/reference signals.

Fig. 14 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment.

Fig. 15 is a diagram showing an example of the configuration of a base station according to an embodiment.

Fig. 16 is a diagram showing an example of a configuration of a user terminal according to an embodiment.

Fig. 17 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment.

Detailed Description

A wireless communication method using millimeter waves is introduced into systems following LTE, such as a 5th generation mobile communication system (5G), 5G + (plus), and New Radio (NR). Hybrid beamforming (e.g., beam Management) based on Massive MIMO (Massive MIMO) is introduced in rel.15nr, and communication speed and reliability of a downlink shared channel (PDSCH) are improved by introduction of Distributed MIMO (multi-TRP) in rel.16nr.

In NR after rel.17, improvement in communication speed and reliability of channels other than a downlink shared channel (PDSCH) by distributed MIMO (multiple TRP) is expected. In NR of rel.17 and later, improvement of beam management in a scenario using a moving body such as an electric Train moving at a High Speed (HTS (High Speed Train)) is expected.

However, the above-described improvement of the communication speed and reliability is of a best effort (best effort) type, and an applied area is limited.

In subsequent systems of NR (e.g., also referred to as 5G +, 6G, etc.), a high data rate/capacity, a wide range of coverage, low energy/cost, low latency, high reliability, a large number of connections, etc. are further required as compared to the above-mentioned 5G. In the present disclosure, "a/B" may also mean "at least one of a and B".

In response to the above-mentioned 6G requirement, a shift from best effort communication to quality assurance communication is expected. Furthermore, high speed/high reliability communication is expected to be expanded to applications to the entire area, not area-limited applications.

There are a plurality of problems in a wireless communication method using millimeter waves. For example, there are concerns about an increase in propagation loss due to an increase in communication distance, an increase in non-line of sight (loss) loss due to high linearity of radio waves, difficulty in implementing high-order SU-MIMO (Single User MIMO) due to a small number of multipaths, and an increase in installation density of devices due to an increase in size of the devices.

In the LTE system, a Single Frequency Network (SFN) using a plurality of small antennas in a building (e.g., a tunnel, a building, etc.) is operated, the Single Frequency Network having the same cell ID for each antenna. SFN is a method of simultaneously transmitting the same signal in the same Physical Resource Block (PRB) using a plurality of antennas, and it is assumed that a UE receiving a signal transmits the signal from 1 point.

Fig. 1 is a diagram showing an example of SFN in a tunnel. In fig. 1, for example, outside the tunnel (e.g., near the tunnel entrance), a large antenna is provided, and inside the tunnel, a small antenna is provided. The large antenna may be an antenna having a transmission power of about 1W to 5W, for example. The small antenna may be an antenna having a transmission power of about 250mW, for example. Large antennas may also transmit Downlink (DL) signals into and out of the tunnel, and small antennas may also transmit DL signals into the tunnel. The large antenna may also perform handover before the UE enters the tunnel. The large antenna and the small antenna of fig. 1 may simultaneously transmit the same DL signal in the same PRB for 1 UE. The arrangement and transmission power of each antenna in fig. 1 are merely an example, and are not limited to this example. Further, the SFN in the tunnel may be replaced with IMCS (in building Mobile Communication System).

In addition, in the present disclosure, "transmission of DL signals in an antenna" may also be replaced with "reception of Uplink (UL) signals in an antenna". Further, "reception of DL signal in UE" may be replaced with "transmission of UL signal in UE".

In order to expand the area where distributed MIMO using millimeter waves is practically applied, a method of arranging a large number of antenna points is being studied. For example, as shown in fig. 2A, a method of securing a high-speed and high-reliability region by arranging a plurality of high-frequency antennas having a relatively narrow coverage area from a low-frequency base station having a relatively wide coverage area may be used.

In addition, in the present disclosure, a low frequency base station having a relatively wide coverage area may also be simply referred to as a base station. Further, a high-frequency antenna having a relatively narrow coverage area may be simply referred to as an antenna.

The plurality of antennas may be installed not only outdoors but also indoors on a ceiling/wall and operated. For example, the present invention may be installed near an indoor illumination light source, and in this case, the probability of being within the line of sight for a plurality of UEs in the room is high, and the propagation loss can be reduced.

Fig. 2A is a diagram showing an example in which a plurality of antennas are arranged in the periphery of a base station. For example, a method of arranging antenna points as shown in fig. 2A can be realized at low cost, but it is difficult to optimize the utilization efficiency of resources, and if the distance of the high-frequency antenna is extended, there is a problem that the propagation loss becomes large.

On the other hand, in order to expand the area where distributed MIMO using millimeter waves is actually applied, a method of extending a part of the function of the base station to the periphery of the high-frequency antenna is also studied. The method is similar to a method of arranging a plurality of Transmission/Reception points (TRPs) at the periphery of a base station.

Fig. 2B is a diagram showing an example in which a plurality of TRPs are arranged in the periphery of a base station. For example, the method of extending a plurality of TRPs to the periphery of the base station as shown in fig. 2B can perform resource control for each TRP, and even if the distance between TRPs is extended, propagation loss can be reduced by actually applying an optical fiber or the like.

In the present disclosure, the "antenna point" may also be referred to as "an antenna corresponding to a physical antenna element" or "an antenna corresponding to a plurality of physical antenna elements (physical antenna elements)". The antenna port may be an "antenna that is a signal processing unit including 1 or more antenna points," a "signal processing unit corresponding to 1 or more antenna points," or a "logical entity corresponding to a signal output from 1 or more antenna points. Further, "antenna group" may also mean "a plurality of antennas including 1 or more antenna points" or "a plurality of antennas including 1 or more antenna ports".

In addition, in the present disclosure, "antenna point" and "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", and the like may be replaced with each other.

In addition, in the present disclosure, "antenna group" and "antenna group" (group), "antenna set", "high frequency antenna group", "high frequency antenna set", and the like may also be substituted for each other.

As a method of arranging a large number of antenna points in order to expand the area of distributed MIMO to which millimeter waves are actually applied, two configurations are being studied.

One is a structure (antenna structure (1)) in which a high-frequency antenna is connected to a high-frequency antenna with a wire or the like and continuously extends in a certain direction, as shown in fig. 3A. In the case of this antenna structure, although the structure cost can be suppressed, the antenna loss increases as the distance from the base station approaches the antenna is relatively far.

As shown in fig. 3B, another structure (antenna structure (2)) for relaying a part of the antennas (for example, relaying using an optical fiber, IAB, or the like) is being studied. In the case of this antenna structure, even in an antenna relatively distant from the base station, the antenna loss can be suppressed.

In the case of the antenna configuration (1), the same signal may be transmitted from all the antenna points. If a UE exists in the vicinity of any one of the plurality of high-frequency antenna points, DL communication can be performed with respect to the UE. In this case, the NW does not need to recognize whether the UE is located near any one of the antennas, and overhead can be suppressed. However, if the same transmission signal is transmitted from all the antenna points, the frequency use efficiency based on the location is deteriorated.

Fig. 4 is a diagram showing an example of communication by the antenna configuration (1). In fig. 4, a DL signal for the UE1 is transmitted from a high frequency antenna. In this case, the UE1 near the high frequency antenna can communicate. The transmission signal to the UE1 from the high-frequency antenna relatively distant from the base station contributes little to improvement of the reception signal to the UE 1. Therefore, it is preferable to actually apply frequency resources to the UE2 and the like in the vicinity of the same high-frequency antenna.

In order to solve the problem of the antenna configuration (1), it is conceivable to divide a series of antenna points into a plurality of antenna points, design an antenna group composed of a plurality of continuous antenna points, and transmit independent transmission signals for each antenna group.

Fig. 5 is a diagram showing an example of communication by the antenna configuration (2). For example, as shown in fig. 5, when antenna points (antenna points #1 to # 4) relatively close to the base station are set as the first antenna group and antenna points (antenna points #5 to # 8) relatively far from the base station are set as the second antenna group, UE1 located near the first antenna group and UE2 located near the second antenna group can appropriately communicate with NWs.

The configuration of the example of fig. 5 has a function of scheduling the base station for each antenna group, and may perform relaying for each antenna group (for example, relaying by stretching of an optical fiber or the like), or may have a part of the function of the base station for each antenna group.

In the antenna configuration (2), the same DL Signal/Reference Signal (RS)) may be transmitted from each antenna group. In the antenna configuration (2), the same (common) DL signal/RS may be transmitted from some antenna groups, and different DL signals/RSs may be transmitted from other antenna groups.

Fig. 6A and 6B are diagrams illustrating an example of communication by the antenna configuration (2). In fig. 6A, in the first antenna group and the second antenna group, a DL signal common to UE1 and UE2 is transmitted. On the other hand, in fig. 6B, in the first antenna group, a DL signal 1 for UE1 is transmitted, and in the second antenna group, a DL signal 2 for UE2 is transmitted.

(TCI, spatial relationship, QCL)

In NR, a reception process (for example, at least one of reception, demapping, demodulation, and decoding) and a Transmission process (for example, at least one of Transmission, mapping, precoding, modulation, and coding) in UE that controls at least one of a signal and a channel (hereinafter, referred to as a signal/channel) based on a Transmission Configuration Indication state (TCI state) are being studied.

The TCI status may also represent the status of the signal/channel being applied to the downlink. A state corresponding to a TCI state of a signal/channel applied to an uplink may also be expressed as a spatial relationship (spatial relationship).

The TCI state is Information related to Quasi-Co-Location (QCL) of a signal/channel, and may be referred to as Spatial reception parameters, spatial relationship Information (Spatial correlation Information), and the like. The TCI status may be set to the UE per channel or per signal.

In the present disclosure, the spatial relationship between the TCI status of DL and UL, the TCI status of UL, and the like may be replaced with each other.

QCL is an indicator that represents the statistical properties of a signal/channel. For example, it can also mean: in a case where a certain signal/channel and another signal/channel have a QCL relationship, it can be assumed that at least one of Doppler shift (Doppler shift), doppler spread (Doppler spread), average delay (average delay), delay spread (delay spread), and spatial parameter (spatial parameter) (for example, spatial Rx parameter) is the same (QCL is a QCL for at least one of them) among these different signals/channels.

In addition, the spatial reception parameters may correspond to reception beams (e.g., reception analog beams) of the UE, or may determine the beams based on the spatial QCL. QCLs (or at least one element of a QCL) in the present disclosure may also be replaced with sqcls (spatial QCLs).

QCLs may also be specified in multiple types (QCL types). For example, four QCL types a-D may also be provided, in which it can be assumed that the same parameters (or parameter sets) are different, expressed as follows with respect to the parameters (which may also be referred to as QCL parameters):

QCL type A (QCL-A): doppler shift, doppler spread, mean delay, and delay spread;

QCL type B (QCL-B): doppler shift and doppler spread;

QCL type C (QCL-C): doppler shift and mean delay;

QCL type D (QCL-D): the space receives the parameters.

The UE is assumed to be in a specific QCL (e.g., QCL type D) relationship with other Control Resource sets (CORESET), channels or reference signals for a specific Set of Control resources, which may also be referred to as QCL assumption.

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

The TCI state may be information relating to QCL between a target channel (in other words, a Reference Signal (RS)) and another Signal (for example, another RS). The TCI status may also be set (indicated) by higher layer signaling, physical layer signaling, or a combination thereof.

In the present disclosure, the higher layer signaling may be any one of Radio Resource Control (RRC) signaling, medium Access Control (MAC) signaling, broadcast information, and the like, or a combination thereof, for example.

MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), and the like. The broadcast Information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), minimum System Information (Remaining Minimum System Information (RMSI)), or Other System Information (OSI)).

The physical layer signaling may be Downlink Control Information (DCI), for example.

The Channel to which the TCI state or spatial relationship is set (specified) may be at least one of a Downlink Shared Channel (Physical Downlink Shared Channel (PDSCH)), a Downlink Control Channel (Physical Downlink Control Channel (PDCCH))), an Uplink Shared Channel (Physical Uplink Shared Channel (PUSCH)), and an Uplink Control Channel (Physical Uplink Control Channel (PUCCH)).

The RS that has a QCL relationship with the Channel may be at least one of a Synchronization Signal Block (SSB), a Channel State Information Reference Signal (CSI-RS), a measurement Reference Signal (Sounding Reference Signal (SRS)), a Tracking CSI-RS (also referred to as Tracking Reference Signal (TRS)), and a QCL detection Reference Signal (also referred to as QRS), for example.

The SSB is a Signal block including at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Broadcast Channel (Physical Broadcast Channel (PBCH)). The SSBs may also be referred to as SS/PBCH blocks.

The information element of the TCI state (the "TCI-state IE" of the RRC) set by higher layer signaling may also contain one or more QCL information ("QCL-Info"). The QCL information may include at least one of information on an RS which becomes a QCL relationship (RS relationship information) and information indicating a QCL type (QCL type information). The RS relation information may also include information of an index of the RS (e.g., SSB index, non-Zero-Power CSI-RS (Non-Zero-Power (NZP) CSI-RS) resource ID (Identifier)), an index of a cell where the RS is located, an index of a Bandwidth Part (BWP)) where the RS is located, and the like.

In rel.15nr, both or only QCL type a RS of QCL type a and QCL type D RS can be set to the UE as the TCI state of at least one of PDCCH and PDSCH.

When a TRS is set as a QCL type a RS, it is assumed that the TRS is different from a DeModulation Reference Signal (DMRS) of a PDCCH or PDSCH, and the same TRS is periodically transmitted for a long time. The UE can measure the TRS and calculate the average delay, delay spread, etc.

The UE having the TRS set as the RS of the QCL type a in the TCI state of the DMRSs of the PDCCH or PDSCH can assume that the DMRSs of the PDCCH or PDSCH are the same as the parameters (average delay, delay spread, and the like) of the QCL type a of the TRS, and thus can obtain the parameters (average delay, delay spread, and the like) of the DMRSs of the PDCCH or PDSCH from the measurement result of the TRS. When performing channel estimation of at least one of the PDCCH and the PDSCH, the UE can perform more accurate channel estimation using the TRS measurement result.

The UE having the QCL type D-set RS can determine a UE reception beam (spatial domain reception filter, UE spatial domain reception filter) using the QCL type D RS.

The RS of QCL type X of TCI state may also represent an RS in a QCL type X relationship with (the DMRS of) a certain channel/signal, which may also be referred to as QCL source of QCL type X of the TCI state.

In addition, in the distributed MIMO technology adopted in rel.17 or later, which utilizes the above-described antenna configuration, no progress has been made in the study on how to control the transmission power. Specifically, studies on a transmission power control method of UL/DL are insufficient. If this control is not clear, an increase in communication throughput may be suppressed.

Therefore, the present inventors have conceived a method of appropriately performing communication by determining transmission power control for each antenna point, port, and group even when the distributed MIMO technique using the antenna configuration is used.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The embodiments may be used alone or in combination.

(Wireless communication method)

< first embodiment >

The present inventors have focused on the case where the physical distance between the antenna points in the antenna group becomes large and the phase of the signal at each antenna point is shifted, and have conceived the first embodiment.

The TCI state may be set differently for each antenna point. In other words, the UE can also assume that the TCI status is set separately (e.g., different TCI statuses) for each antenna point. In addition, in the present disclosure, at least one of the TCI status and DL TCI status, UL TCI status, unified TCI status (unified TCI state), spatial relationship, QCL assumption, and QCL type may be replaced with each other.

For example, the UE may be assumed to be set with the TCI status separately in units of antenna points. That is, the setting of the TCI state may be supported differently for a plurality of antenna points. Further, the UE may be assumed to set the TCI status separately for each (set of) a plurality of antenna points.

Further, the UE can also be conceived to be set in units of antenna groups for a specific QCL type (e.g., QCL type D). For example, it is conceivable that the UE receives a DeModulation Reference Signal (DMRS) corresponding to a CDM group while having at least a specific QCL type in between antenna points of the same CDM (Code Division Multiplexing) group (for example, in at least one of a Code domain, a spatial domain, and a beam region). The UE may also be configured to receive DMRSs corresponding to different CDM groups, in which QCL types other than a specific type are different between antenna points of different CDM groups (for example, between antenna points in which antenna points are multiplexed in at least one of the time domain and the frequency domain).

In addition, in the present disclosure, a CDM group, a CORESET, a PDSCH, a codeword, an antenna port group (e.g., DMRS port group), a reference signal group, a CORESET group, and the like may also be substituted for one another. In addition, the antenna group and the TRP can be mutually replaced.

The setting of the TCI status (QCL) for the antenna point may also be performed through higher layer signaling (e.g., RRC signaling), physical layer signaling (e.g., DCI), or a combination of these. For example, QCLs for 1 or more antenna points may also be semi-statically set through RRC signaling. Further, QCLs for 1 or more antenna points may be selected by the MAC CE after being semi-statically set by RRC signaling. QCLs for 1 or more antenna points may be selected by MAC CE after being semi-statically set by RRC signaling, and may be selected by DCI after being selected by MAC CE.

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

At least one of the UE and the NW may perform independent signal processing (e.g., precoding) on each antenna point included in the 1 antenna group. At least one of the UE and the NW is required to perform transmission and reception processing based on antenna points of different phases in the antenna group. For this purpose, it is preferable to grasp the channel state (including the phase difference) between the UE and each antenna point.

For example, the UE may transmit a UL Reference Signal (RS) (e.g., SRS), and the NW may perform Channel State Information (CSI) measurement based on the Reference Signal. In this case, the NW can appropriately measure a channel including the phase difference of each antenna point.

For example, when CSI measurement is performed by DL RS, the UE may perform CSI measurement based on a new CSI codebook that takes into account a phase difference of signals between antenna points. In other words, the UE may perform signal processing of the DL signal received from each antenna point based on the newly defined codebook. For example, the UE may also make CSI measurements related to multiple panels with reference to a codebook facing a single panel, assuming that 1 panel corresponds to 1 antenna point. Alternatively, the plurality of panels may be incoherent.

In the present disclosure, CSI may be measured for each antenna point, may be measured for each antenna port, may be measured for each antenna group, or may be measured for each of a plurality of antenna groups.

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

< second embodiment >

The following describes the association between an antenna point and an antenna group including one or more antenna points. The number of antenna points constituting an antenna group shown in the following description is merely an example, and is not limited thereto.

The UE may also envisage that the association of antenna points with antenna groups is made based on some rule. The rules may also be specified in the specification in advance. For example, X (X is an arbitrary natural number) antenna points may be set as a unit of 1 antenna group, and X may be defined by a specification. For example, as shown in fig. 7A, 1 antenna group may be configured for every 4 antenna points.

Furthermore, the UE may also envisage that association of antenna points with antenna groups is made (at least one of notification, setting, updating, activation, deactivation is made) by higher layer signaling, physical layer signaling, or a combination of these. In this case, flexible communication control according to the distribution of a plurality of UEs, traffic volume, and the like can be performed.

For example, as shown in fig. 7B, the association of antenna points with antenna groups may also be updated through higher layer signaling, physical layer signaling, or a combination of these.

In addition, each antenna point included in the antenna group may not be continuous. For example, the UE may also be informed of the antenna points included in the antenna group through a bitmap.

The number (ID, index) of the antenna point may be a local number in each antenna group. For example, as in the example shown in fig. 8A, the antenna dot numbers (in this case, #0 to # 3) may be set in ascending order in each antenna group. Further, the number of antenna points may also be common in each antenna group. In this case, the numbering of the antenna points constituting the different antenna groups may be common or different. For example, as in the example shown in fig. 8B, the same antenna dot number (in this case, # 0) may be set.

In addition, in the present disclosure, the ascending order may also be replaced with the descending order.

Further, the association between the (equivalent) antenna point corresponding to the physical antenna element (or the set of a plurality of physical antenna elements) and the antenna port of the signal processing unit may be set (or defined or instructed). For example, as in the example shown in fig. 9, a number may be set for associating each antenna point included in the first and second antenna groups with an antenna port of a signal processing unit.

The association of antenna points, antenna ports, and antenna groups may also be explicitly signaled to the UE through higher layer signaling, physical layer signaling, or a combination of these.

For example, the association of antenna points, antenna ports, and antenna groups may also be signaled to the UE through higher layer signaling (e.g., RRC signaling, MAC CE).

Further, regarding the association of antenna points, antenna ports, and antenna groups, multiple associations may also be signaled to the UE through higher layer signaling (e.g., RRC signaling, MAC CE). The UE may also decide 1 association from the plurality of associations through DCI. The DCI may be DCI for scheduling a control channel/shared channel, and an indication field related to association of an antenna point, an antenna port, and an antenna group may be defined. The size of the indication field may also be Ceil (log 2 (M)) bits. In this case, M may be the number of candidates notified to the UE by higher layer signaling (or the number of associations set to the UE). In addition, ceil (X) in this disclosure may also refer to the top function of X.

In addition, the UE may also implicitly determine the association of antenna points, antenna ports, and antenna groups.

For example, the UE may also implicitly determine the association of antenna points, antenna ports, and antenna groups based on the physical resources of the DCI (or the PDCCH transmitting the DCI). The physical Resource of the DCI may be at least one of a time Resource, a frequency Resource, a Control Channel Element (CCE) index, a search space index, a Control Resource Set (CORESET) index, and an aggregation level of the DCI. For example, the UE may assume that the number of remainders obtained by further dividing the value of the CCE index (or the value of the aggregation level, or the value obtained by dividing the CCE index by the aggregation level) by a certain integer is set to the value related to the association of the antenna point, the antenna port, and the antenna group instructed from the NW.

For example, the UE may also assume that, based on the association of the antenna point, the antenna port, and the antenna group of the DCI, the antenna point, the antenna port, and the antenna group of the data scheduling based on the DCI are determined. For example, the UE may also assume that the association of the antenna point, antenna port, and antenna group of the DCI and the association of the antenna point, antenna port, and antenna group of the data scheduling based on the DCI are common. For example, the UE may apply a certain transformation to the association between the antenna points, antenna ports, and antenna groups of the DCI to determine the association between the antenna points, antenna ports, and antenna groups scheduled by the DCI data.

For example, the UE may also assume that an antenna point, an antenna port, and an antenna group to be scheduled based on DCI (or PDCCH transmitting DCI) are determined based on the TCI state of the DCI.

In addition, the association of antenna points with antenna groups described in the second embodiment may be the same or different in uplink and downlink. The association may be set, activated, determined, or the like for each channel and each reference signal, or may be set, activated, determined, or the like for a plurality of channels and reference signals in common.

According to the second embodiment described above, the UE can perform appropriate communication based on the association of the antenna points, the antenna ports, and the antenna groups.

< third embodiment >

Next, transmission power control for the antenna points, antenna ports, and antenna groups will be described.

Uplink (UL)/Downlink (DL) signals (e.g., UL/DL data channels, UL/DL control channels) may also be subjected to transmission power control. UL/DL reference signals (e.g., DMRS, SRS, CSI-RS, TRS, etc.) may also be transmit power controlled. These transmission power controls may also be performed based on at least one of Open Loop (OL) -TPC (e.g., path loss guaranteed type (P0 is notified), fractional TPC (α is notified on the basis of P0)), and Closed Loop (CL) -TPC (TPC command is notified).

Here, the power control parameter for OL-TPC may also include at least one of P0, α, and a path loss reference RS. P0 may be a parameter relating to a transmission power offset, a target reception power parameter, or the like, for example. Further, α may be a value provided by a higher layer parameter such as msg3-Alpha, p0-PUSCH-Alpha, or a fractional factor. The path-loss reference RS may be provided by either higher layer parameters (e.g., pathlossReferenceRSs) or a combination of higher layer parameters and the MAC CE. The power control parameter for the CL-TPC may include at least one of a closed loop index (power control adjustment state index, an index corresponding to an accumulated value of the TPC commands), and an accumulated value of the TPC commands (power control adjustment state).

Furthermore, power control parameters may also be maintained for UL beam specific/UL UE panel specific. The base station or the UE is subjected to transmission power control by indicating (or selecting) the held power control parameter.

Furthermore, the power control parameters may also be maintained for antenna point specific/group specific/panel specific/port specific for the Transmit Receive Point (TRP). The base station or the UE indicates (or selects) the maintained power control parameter, thereby being subjected to transmission power control.

[ operations 1-1 ]

Fig. 10 is a diagram showing an example of determination of transmission power when transmission power control is performed for each antenna point/port. In fig. 10, antenna points #0 and #1 are included in the first antenna group, and antenna points #2 and #3 are included in the second antenna group. In the present disclosure, the antenna point may also be referred to as a virtual (virtual) antenna point, a virtual (virtual) antenna port, a pseudo-antenna point, a pseudo-antenna port, a virtual (virtual) RS point, a virtual (virtual) RS port, a pseudo-RS point, a pseudo-RS port, or the like.

The UE may assume that a virtual antenna point/port (may also be referred to as a virtual antenna point/port) is formed of antenna points/ports actually used for MIMO transmission. A virtual antenna point/port may encompass only antenna points/ports within an antenna group or antenna points/ports throughout multiple antenna groups. In addition, a virtual (virtual) antenna point/port for a certain multi-antenna transmission may also constitute a virtual (virtual) antenna group.

The UE and NW may also associate antenna points within an antenna group with antenna ports. The network may notify the UE of information on the antenna point/port actually used for MIMO transmission using higher layer signaling, physical layer signaling, or a combination of these.

In addition, a virtual (virtual) antenna point/port may also correspond to an antenna point/port that is activated based on higher layer signaling, physical layer signaling, or a combination of these.

Note that each antenna point (or each virtual antenna point) in the antenna group (or each virtual antenna group) may transmit the same data, or may perform signal processing and transmission independently.

As shown in fig. 10, when transmission power control is performed for each antenna point/port, a power control parameter (for example, a parameter of Open Loop (OL) -TPC) may be set for each antenna point/port.

The power control parameter (for example, the state of CL-TPC (the integrated value of TPC commands)) may be held for each antenna point/port. For example, P0 (i) in fig. 10 indicates P0 for port # i.

At least one of the parameters of the specific OL-TPC and the status of the CL-TPC may also be maintained for at least one of the beam, the antenna panel and the TRP, per antenna point/port.

Value of maximum transmission power (P) _CMAX Values related to Maximum Power Reduction (MPR), etc.) may be performed per antenna point/endThe mouth is defined/set. Here, P _CMAX For example, the transmission power in the UE (also referred to as maximum transmission power, UE maximum output power, or the like) may be used. The MPR may reduce the maximum transmission power based on, for example, the size and cost of the UE.

The UE may also apply a corresponding power control parameter (e.g., at least one of a TPC parameter, a state, and a held value) to determine the transmission power for each antenna point/port of the transmission destination.

The selection of the antenna point, port, and group to be transmitted may be determined by the UE based on an instruction from the base station, or based on reception Power (e.g., reference Signal Received Power (RSRP)), reception Quality (e.g., reference Signal Received Quality (RSRQ)), or the like. In the following operations 1-2 to 1-4, the antenna point/port/group of the transmission destination may be selected in the same manner as in operation 1-1.

According to the above-described operation 1-1, the transmission power is determined for each antenna point/port, thereby enabling appropriate communication.

Operations 1-2

Fig. 11 is a diagram showing an example of determination of transmission power in the case where transmission power control is performed for each antenna group. As shown in fig. 11, when transmission power control is performed for each antenna group, a power control parameter (e.g., a parameter of OL-TPC) may be set for each antenna group.

The CL-TPC state (the accumulated value of the TPC commands) may be maintained for each antenna group.

At least one of the parameters of a specific OL-TPC and the state of the CL-TPC for at least one of the beam, the antenna panel and the TRP may also be maintained per antenna group.

Value of maximum transmission power (P) _CMAX Values of MPR, etc.) may be defined (or set) for each antenna group.

The UE may also apply a corresponding power control parameter (e.g., at least one of a TPC parameter, a state, and a held value) to decide transmission power for each antenna group of a transmission destination.

According to the above-described operations 1-2, the transmission power is determined for each antenna group, thereby enabling appropriate communication.

Operations 1-3

Fig. 12 is a diagram showing an example of determination of transmission power in the case where transmission power control is performed for each of a plurality of (all) antenna groups. As shown in fig. 12, when transmission power control is performed for each of a plurality of (all) antenna groups, a power control parameter (for example, a parameter of OL-TPC) may be set for each of a plurality of (all) antenna groups.

The state of the CL-TPC (the integrated value of the TPC commands) may be held for each of the plurality of (all) antenna groups.

At least one of the parameters of the specific OL-TPC and the state of the CL-TPC for at least one of the beam, the antenna panel and the TRP may also be maintained for each of the plurality of (all) antenna groups.

Value of maximum transmission power (P) _CMAX Values of MPR, etc.) may be defined and set for each of a plurality of (all) antenna groups.

The UE may also apply a corresponding power control parameter (e.g., at least one of a TPC parameter, a state, and a held value) to determine the transmission power for each of the plurality of (all) antenna groups to which transmission is addressed.

According to the above-described operations 1 to 3, the transmission power is determined for each of the plurality of (all) antenna groups, thereby enabling appropriate communication.

Whether or not to perform transmission power control in accordance with any of the above-described operations 1-1 to 1-3 may also be notified by higher layer signaling (e.g., RRC signaling).

Operations 1-4

When orthogonalization is applied to a transmission signal in a certain unit, the UE may perform common transmission power control in the unit to which the orthogonalization is applied. The certain unit may be multiple antenna points, multiple antenna ports, or one or more antenna groups. This certain unit may also be referred to as an orthogonalization unit, for example.

For example, when orthogonalization using at least one of an Orthogonal Cover Code (OCC), cyclic Shift (CS) and a code is applied between antenna points/ports/in groups, common transmission power may be applied to antenna points/ports/in groups to which the orthogonalization is applied. The length of the code used for orthogonalization may also be the number of antenna points/ports/groups to which orthogonalization is applied.

The common transmit power control may be performed based on a common TPC command, or may be performed using a common transmit power value.

Here, it is also conceivable to apply transmission power independently for each antenna point, port, and group without applying orthogonalization using at least one of OCC, CS, and code between antenna points, ports, and groups.

In addition, when orthogonalization using at least one of OCC, CS, and code is applied between antenna points, ports, and groups, it is also conceivable to apply common transmission power to the applied antenna points, ports, and groups.

In addition, when orthogonalization using at least one of OCC, CS, and code is applied for each antenna group, it is also conceivable to apply common transmission power to the applied antenna group.

According to the above-described operations 1 to 4, when orthogonalization using at least one of OCC, CS, and code is applied between antenna points/ports/in groups and when not applied, transmission power control is performed commonly or independently for each antenna point/port/group, thereby enabling appropriate communication.

However, when orthogonalization using at least one of OCC, CS, and code is applied between antenna points, ports, and groups, common transmission power control is performed in antenna points, ports, and groups having different installation distances, and therefore, it is considered that the reception power from different antenna points, ports, and groups differs, and a near-far problem arises.

Therefore, when orthogonalization using at least one of OCC, CS, and code is applied between antenna points, ports, and in-group, the transmission power for each antenna point, port, and group may be made path loss guaranteed (P0 is notified). This makes it possible to perform path loss guaranteed transmission power control independently of each other, and to equalize (keep constant) the received power from the antenna points, ports, and groups, thereby preventing the near-far problem.

Further, the above-described operations 1-1 to 1-4 may be replaced with transmission power control per transmission antenna point/transmission antenna group/transmission antenna panel/transmission entity (entity). Further, the designation of the transmission antenna point/transmission antenna group/transmission antenna panel/transmission entity may also be set by the physical transmission antenna point/physical transmission antenna group/physical transmission antenna panel/physical transmission entity of the UE, or may also be set by the physical transmission antenna point/physical transmission antenna group/physical transmission antenna panel/physical transmission entity of the base station. Here, the entity (entity) may be a parameter related to the unit of the antenna and signal processing for transmission and reception.

In this case, in the third embodiment described with reference to fig. 10 to 12, the base station (receiving) side may be replaced with the UE (transmitting) side.

< fourth embodiment >

Hereinafter, UL beam control by transmission power control will be described. The method of controlling the UL beam based on the transmission power control shown in the following description is merely an example, and is not limited thereto.

Fig. 13 is a diagram illustrating an example of UL beam control for UL signals/reference signals (e.g., UL data channels, UL control channels, DMRSs, SRS, etc.). As shown in fig. 13, UL signals/reference signals may also be UL beam-controlled. The UL beam control may be performed in conjunction with the transmission power control, or may be performed independently of the transmission power control.

In the present disclosure, "linkage" may be replaced with "corresponding" or "associated" or the like.

Operation 2-1: in conjunction with transmission power control

When the UL beam control is performed in conjunction with the transmission power control, the power control parameter (for example, at least one of the integrated values of the path loss reference RS, P0, α, and CL-TPC) may be controlled (or held) to be UL beam-specific/UL UE panel-specific. In this case, the base station may also be configured to perform UL beam control in conjunction with the power control parameter by indicating (or selecting) the power control parameter to the UE.

In the present disclosure, "power control parameter is instructed" and "transmission power control using the power control parameter is instructed" may be replaced with each other.

The UE may be configured (or instructed or activated) to associate the UL beam or panel with the power control parameter using higher layer signaling (e.g., RRC signaling, MAC CE), physical layer signaling (e.g., DCI), or a combination thereof.

As shown in fig. 13, for example, when the UE using UL beam #0 is instructed by the base station of the power control parameter corresponding to UL beam #1, the UE may control to switch to UE beam #1.

Furthermore, a power control parameter (e.g., at least one of path loss reference RS, P0, α, and an accumulated value of CL-TPC) may also be controlled (or maintained) for an antenna point/port/group/panel of a base station (TRP). In this case, the base station may also be configured to perform UL beam control in conjunction with the power control parameter by indicating (or selecting) the power control parameter to the UE.

The UE may also be configured (or instructed, activated) to associate the power control parameters with the antenna points/ports/groups/panels of the base station using higher layer signaling (e.g., RRC signaling, MAC CE), physical layer signaling (e.g., DCI), or a combination thereof.

According to the above-described operation 2-1, since the UL beam control is performed in conjunction with the transmission power control, setting (notification or instruction) from the base station for the UL beam control is not required, and overhead can be reduced.

Operation 2-2: independently of transmit power control

When the UL beam control and the transmission power control are performed independently, the determination of the UL beam may not be dependent on the transmission power control.

For example, the power control parameters (e.g., at least one of the accumulated values of the path loss reference RS, P0, α, and CL-TPC) may also be controlled (or maintained) to be UL beam specific/UL UE panel specific/UE antenna port specific/antenna point specific/antenna group specific/multiple antenna group specific. In this case, the UE may also be set (informed or instructed) with a UL beam specific/UL UE panel specific/UE antenna port specific/antenna point specific/antenna group specific/multiple antenna group specific UL beam.

As shown in fig. 13, for example, even when a UE using UL beam #0 is instructed by the base station of a power control parameter (for example, a different value of P0) different from the power control parameter used so far, UL beam control may be performed without being interlocked with transmission power control (UL beam #0 may be used as it is for transmission based on the different power control parameter).

In addition, the power control parameter (e.g., at least one of the integrated values of the path loss reference RS, P0, α, and CL-TPC) may also be controlled (or maintained) to be antenna point-specific/antenna group-specific/antenna panel-specific/antenna port-specific on the reception side of the Transmission Reception Point (TRP). In this case, the UE may also be set (informed or instructed) with a UL beam specific/UL UE panel specific/UE antenna port specific/antenna point specific/antenna group specific/multiple antenna group specific UL beam.

According to the above-described operation 2-2, since the UL beam control is performed independently from the transmission power control, flexible scheduling for the UL beam control can be performed.

In accordance with either of the above-described operations 2-1 and 2-2, whether or not to perform UL beam control (in other words, whether or not to determine UL beam control in association with transmission power control) may be switched by a higher layer parameter.

(Wireless communication System)

Hereinafter, a configuration of a radio communication system according to an embodiment of the present disclosure will be described. In this radio communication system, communication is performed using any one of the radio communication methods according to the above embodiments of the present disclosure or a combination thereof.

Fig. 14 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication by Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3 GPP), a New wireless (5 th Generation mobile communication system New Radio (5G NR)), and the like.

In addition, the wireless communication system 1 may also support Dual Connectivity (Multi-RAT Dual Connectivity (MR-DC)) between a plurality of Radio Access Technologies (RATs). The MR-DC may include Dual connection of LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC))), dual connection of NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC))), and the like.

In EN-DC, a base station (eNB) of LTE (E-UTRA) is a Master Node (MN), and a base station (gNB) of NR is a Slave Node (SN). In NE-DC, the base station of NR (gNB) is MN and the base station of LTE (E-UTRA) (eNB) is SN.

The wireless communication system 1 may also support Dual connection between a plurality of base stations within the same RAT (for example, dual connection of a base station (gNB) in which both MN and SN are NR (NR-NR Dual Connectivity (NN-DC)))).

The wireless communication system 1 may include: a base station 11 forming a macrocell C1 having a relatively wide coverage area, and base stations 12 (12 a to 12C) arranged in the macrocell C1 and forming a small cell C2 narrower than the macrocell C1. The user terminal 20 may also be located in at least one cell. The arrangement, number, and the like of each cell and user terminals 20 are not limited to the illustrated embodiments. Hereinafter, base stations 11 and 12 will be collectively referred to as base station 10 without distinguishing them.

The user terminal 20 may also 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) and Dual Connectivity (DC) using a plurality of Component Carriers (CCs)).

Each CC may be included in at least one of the first Frequency band (Frequency Range 1 (FR 1))) and the second Frequency band (Frequency Range 2 (FR 2))). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR 2. For example, FR1 may be a frequency band of 6GHz or less (less than 6GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24GHz (above-24 GHz). The frequency bands, definitions, and the like of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR 2.

The user terminal 20 may perform communication in each CC by using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

The plurality of base stations 10 may also be connected by wire (e.g., optical fiber based Common Public Radio Interface (CPRI)), X2 Interface, or the like) or wireless (e.g., NR communication). For example, when NR communication is used as a Backhaul between base stations 11 and 12, base station 11 corresponding to an upper station may be referred to as an Integrated Access Backhaul (IAB) donor (donor) and base station 12 corresponding to a relay (relay) may be referred to as an IAB node.

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 include at least one of an Evolved Packet Core (EPC), a 5G Core Network (5 GCN)), a Next Generation Core (NGC), and the like.

The user terminal 20 may be a terminal supporting at least one of the communication systems such as LTE, LTE-a, and 5G.

The radio communication system 1 may use a radio access scheme based on Orthogonal Frequency Division Multiplexing (OFDM). 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), or the like may be used.

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

As the Downlink Channel, a Downlink Shared Channel (Physical Downlink Shared Channel (PDSCH)) Shared by the user terminals 20, a Broadcast Channel (Physical Broadcast Channel (PBCH))), a Downlink Control Channel (Physical Downlink Control Channel (PDCCH)), and the like may be used in the radio communication system 1.

As the Uplink Channel, an Uplink Shared Channel (Physical Uplink Shared Channel (PUSCH))), an Uplink Control Channel (Physical Uplink Control Channel (PUCCH))), a Random Access Channel (Physical Random Access Channel (PRACH)), and the like, which are Shared by the user terminals 20, may be used in the radio communication system 1.

User data, higher layer control Information, a System Information Block (SIB), and the like are transmitted through the PDSCH. User data, higher layer control information, etc. may also be transmitted over the PUSCH. In addition, a Master Information Block (MIB)) may also be transmitted through the PBCH.

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

The DCI scheduling PDSCH may be referred to as DL assignment, DL DCI, or the like, and the DCI scheduling PUSCH may be referred to as UL grant, UL DCI, or the like. In addition, PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

For PDCCH detection, a COntrol REsource SET (countrol REsource SET (CORESET)) and a search space (search space) may be used. CORESET corresponds to searching for DCI resources. The search space corresponds to a search region and a search method of PDCCH candidates (PDCCH candidates). A CORESET may also be associated with one or more search spaces. The UE may also monitor the CORESET associated with a certain search space based on the search space settings.

One search space may also correspond to PDCCH candidates that comply with one or more aggregation levels (aggregation levels). The one or more search spaces may also be referred to as a set of search spaces. In addition, "search space", "search space set", "search space setting", "search space set setting", "CORESET setting", and the like of the present disclosure may be replaced with each other.

Uplink Control Information (UCI)) including at least one of Channel State Information (CSI), ACKnowledgement Information (for example, hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK)), ACK/NACK, and Scheduling ReQuest (SR)) may also be transmitted through the PUCCH. A random access preamble for establishing a connection with a cell may also be transmitted through the PRACH.

In addition, in the present disclosure, a downlink, an uplink, or the like may also be expressed without "link". Note that the beginning of each channel may be expressed without "Physical (Physical)".

In the wireless communication system 1, a Synchronization Signal (SS), a Downlink Reference Signal (DL-RS), and the like may be transmitted. The DL-RS may be a Cell-specific Reference Signal (CRS), a Channel State Information Reference Signal (CSI-RS), a DeModulation Reference Signal (DMRS), a Positioning Reference Signal (PRS), a Phase Tracking Reference Signal (PTRS), or the like, which is transmitted through the wireless communication system 1.

The Synchronization Signal may be at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS), for example. The signal blocks containing the SS (PSS, SSs) and PBCH (and DMRS for PBCH) may also be referred to as SS/PBCH blocks, SS blocks (SSB), and the like. In addition, SS, SSB, etc. may also be referred to as reference signals.

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

(base station)

Fig. 15 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmitting/receiving unit 120, a transmitting/receiving antenna 130, and a transmission line interface (transmission line interface) 140. The control unit 110, the transmission/reception unit 120, the transmission/reception antenna 130, and the transmission path interface 140 may be provided with one or more than one.

In this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, but it is also conceivable that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured by a controller, a control circuit, and the like described based on common knowledge in the technical field of the present disclosure.

The control unit 110 may also control generation of signals, scheduling (e.g., resource allocation, mapping), and the like. The control unit 110 may control transmission/reception, measurement, and the like using the transmission/reception unit 120, the transmission/reception antenna 130, and the transmission path interface 140. Control section 110 may generate data, control information, sequence (sequence), and the like to be transmitted as a signal, and forward the generated data, control information, sequence, and the like to transmission/reception section 120. The control unit 110 may perform call processing (setting, release, and the like) of a communication channel, state management of the base station 10, management of radio resources, and the like.

The transceiver 120 may also include a baseband (baseband) unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transmitting/receiving unit 120 can be configured by a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transmitting/receiving circuit, and the like, which are described based on common knowledge in the technical field of the present disclosure.

The transmission/reception unit 120 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit. The transmission unit may be constituted by the transmission processing unit 1211 and the RF unit 122. The receiving unit may be configured by the reception processing unit 1212, the RF unit 122, and the measurement unit 123.

The transmitting/receiving antenna 130 can be configured by an antenna described based on common knowledge in the technical field of the present disclosure, for example, an array antenna.

The transmitting/receiving unit 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, and the like. The transmission/reception unit 120 may receive the uplink channel, the uplink reference signal, and the like.

Transmit/receive unit 120 may also form at least one of a transmit beam and a receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), and the like.

For example, with respect to Data, control information, and the like acquired from Control section 110, transmission/reception section 120 (transmission processing section 1211) may perform processing of a Packet Data Convergence Protocol (PDCP) layer, processing of a Radio Link Control (RLC) layer (e.g., RLC retransmission Control), processing of a Medium Access Control (MAC) layer (e.g., HARQ retransmission Control), and the like, and generate a bit string to be transmitted.

Transmission/reception section 120 (transmission processing section 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filter processing, discrete Fourier Transform (DFT) processing (if necessary), inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on a bit sequence to be transmitted, and output a baseband signal.

The transmission/reception section 120 (RF section 122) may perform modulation, filtering, amplification, and the like for the baseband signal in the radio frequency band, and transmit the signal in the radio frequency band via the transmission/reception antenna 130.

On the other hand, the transmission/reception unit 120 (RF unit 122) may perform amplification, filter processing, demodulation to a baseband signal, and the like on a signal of a radio frequency band received by the transmission/reception antenna 130.

With respect to the obtained baseband signal, transmitting/receiving section 120 (reception processing section 1212) may apply reception processing such as analog-to-digital conversion, fast Fourier Transform (FFT) processing, inverse Discrete Fourier Transform (IDFT) processing (if necessary), filter processing, demapping, demodulation, decoding (including error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to obtain user data.

The transmission/reception unit 120 (measurement unit 123) may also perform measurement related to the received signal. For example, measurement section 123 may perform Radio Resource Management (RRM) measurement, channel State Information (CSI) measurement, and the like based on the received signal. Measurement section 123 may perform measurement of Received Power (e.g., reference Signal Received Power (RSRP)), received Quality (e.g., reference Signal Received Quality (RSRQ)), signal to Interference plus Noise Ratio (SINR)), signal to Noise Ratio (SNR)), signal Strength (e.g., received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), and the like. The measurement result may also be output to the control unit 110.

The propagation path interface 140 may transmit and receive signals (backhaul signaling) to and from devices included in the core network 30, other base stations 10, and the like, or may acquire and transmit user data (user plane data) for the user terminal 20, control plane data, and the like.

The transmitting unit and the receiving unit of the base station 10 in the present disclosure may be configured by at least one of the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission line interface 140.

(user terminal)

Fig. 16 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission/reception unit 220, and a transmission/reception antenna 230. Further, the control unit 210, the transmission/reception unit 220, and the transmission/reception antenna 230 may be provided with one or more antennas.

In this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, but it is also conceivable that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured by a controller, a control circuit, and the like described based on common knowledge in the technical field of the present disclosure.

The control unit 210 may also control the generation, mapping, etc. of the signals. The control unit 210 may control transmission/reception, measurement, and the like using the transmission/reception unit 220 and the transmission/reception antenna 230. Control section 210 may generate data, control information, a sequence, and the like to be transmitted as a signal, and forward the generated data, control information, sequence, and the like to transmission/reception section 220.

The transmitting/receiving unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212. The transmitting/receiving section 220 can be configured by a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, and the like, which are described based on common knowledge in the technical field of the present disclosure.

The transmission/reception unit 220 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit. The transmission section may be constituted by the transmission processing section 2211 and the RF section 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measuring unit 223.

The transmitting/receiving antenna 230 can be configured by an antenna described based on common knowledge in the technical field of the present disclosure, for example, an array antenna.

The transmitting/receiving unit 220 may receive the downlink channel, the synchronization signal, the downlink reference signal, and the like. The transmission/reception unit 220 may transmit the uplink channel, the uplink reference signal, and the like described above.

Transmit/receive section 220 may form at least one of a transmit beam and a receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), and the like.

For example, the transmission/reception section 220 (transmission processing section 2211) may perform processing of the PDCP layer, processing of the RLC layer (for example, RLC retransmission control), processing of the MAC layer (for example, HARQ retransmission control), and the like on data, control information, and the like acquired from the control section 210, and generate a bit sequence to be transmitted.

Transmission/reception section 220 (transmission processing section 2211) may perform transmission processing such as channel coding (including error correction coding as well), modulation, mapping, filter processing, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on a bit sequence to be transmitted, and output a baseband signal.

Whether or not DFT processing is applied may be set based on transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is active (enabled), transmission/reception section 220 (transmission processing section 2211) may perform DFT processing as the transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, or otherwise, transmission/reception section 220 (transmission processing section 2211) may not perform DFT processing as the transmission processing.

The transmission/reception unit 220 (RF unit 222) may perform modulation, filtering, amplification, and the like on a baseband signal in a radio frequency band, and transmit a signal in the radio frequency band via the transmission/reception antenna 230.

On the other hand, the transmission/reception section 220 (RF section 222) may perform amplification, filter processing, demodulation to a baseband signal, and the like on a signal in a radio frequency band received by the transmission/reception antenna 230.

Transmission/reception section 220 (reception processing section 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, decoding (including error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data.

The transceiver unit 220 (measurement unit 223) may also perform measurements related to the received signal. For example, the measurement unit 223 may also perform RRM measurement, CSI measurement, and the like based on the received signal. Measurement unit 223 may also measure for received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), and the like. The measurement result may also be output to the control unit 210.

The transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting/receiving unit 220 and the transmitting/receiving antenna 230.

The transmission/reception unit 220 may receive information on a transmission setting indication (TCI) state, which is set separately for each antenna group or each antenna point. Control section 210 may control transmission and reception of signals to and from one or more antenna points constituting the antenna group based on the information (first embodiment).

Transmission/reception section 220 may receive information related to the association between the one or more antenna points and one or more antenna groups including the one or more antenna points (second embodiment).

Control section 210 may determine association between the one or more antenna points and one or more antenna groups composed of the one or more antenna points based on information included in the downlink control information (second embodiment).

Control section 210 may also determine the transmission power of a signal for an antenna point included in an antenna group based on a power control parameter associated with the antenna group (third embodiment).

When orthogonalization is applied to signals for antenna points included in an antenna group, control section 210 may use common transmission power control for signals for a plurality of antenna points to which the orthogonalization is applied. Further, when orthogonalization is not applied to signals for antenna points included in an antenna group, control section 210 may use independent transmission power control for each of signals for a plurality of antenna points to which the orthogonalization is applied (fourth embodiment).

Here, the "power control parameter associated with the antenna group" may also be the parameter explained in the above-described operations 1-1 to 2-2.

(hardware configuration)

The block diagram used in the description of the above embodiment shows blocks in functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. The method of implementing each functional block is not particularly limited. That is, each functional block may be implemented by one apparatus that is physically or logically combined, or may be implemented by a plurality of apparatuses that are directly or indirectly (for example, by wire or wireless) connected to two or more apparatuses that are physically or logically separated. The functional blocks may also be implemented by combining one or more of the above-described devices with software.

Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, establishment, comparison, assumption, expectation, view, broadcast (broadcasting), notification (notification), communication (communicating), forwarding (forwarding), configuration (setting), reconfiguration (resetting), allocation (allocating, mapping), and assignment (ordering). For example, a function block (a configuration unit) that realizes a transmission function may also be referred to as a transmission unit (transmitting unit), a transmitter (transmitter), or the like. Any of these methods is not particularly limited, as described above.

For example, the base station, the user terminal, and the like in one embodiment of the present disclosure may function as a computer that performs processing of the radio communication method of the present disclosure. Fig. 17 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment. The base station 10 and the user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In addition, in the present disclosure, terms of devices, circuits, apparatuses, sections (sections), units, and the like can be substituted for one another. The hardware configuration of the base station 10 and the user terminal 20 may include one or more of the devices shown in the drawings, or may not include some of the devices.

For example, only one processor 1001 is illustrated, but there may be multiple processors. The processing may be executed by one processor, or may be executed by two or more processors simultaneously, sequentially, or by another method. Further, the processor 1001 may be implemented by one or more chips.

Each function of the base station 10 and the user terminal 20 is realized by, for example, reading specific software (program) into hardware such as the processor 1001 and the memory 1002, and performing calculation by the processor 1001 to control communication via the communication device 1004 or to control at least one of reading and writing of data in the memory 1002 and the storage 1003.

The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be configured by a Central Processing Unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, at least a part of the control unit 110 (210), the transmission/reception unit 120 (220), and the like may be implemented by the processor 1001.

Further, the processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiments may be used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and may be similarly realized for other functional blocks.

The Memory 1002 may be a computer-readable recording medium, and may be configured by at least one of a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), a Random Access Memory (RAM), or another suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory (primary storage), etc. The memory 1002 can store a program (program code), a software module, and the like that are executable to implement the wireless communication method according to one embodiment of the present disclosure.

The storage 1003 may be a computer-readable recording medium, and may be configured with at least one of a flexible disk (flexible Disc), a Floppy (registered trademark) disk, an optical disk (e.g., a Compact Disc read only memory (CD-ROM)) or the like), a digital versatile Disc (dvd), a Blu-ray (registered trademark) disk), a removable disk (removable Disc), a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe (stripe), a database, a server, or other suitable storage media. Storage 1003 may also be referred to as secondary storage.

The communication device 1004 is hardware (transmission/reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. Communication apparatus 1004 may be configured to include a high Frequency switch, a duplexer, a filter, a Frequency synthesizer, and the like, in order to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD), for example. For example, the above-described transmission/reception section 120 (220), transmission/reception antenna 130 (230), and the like may be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may be implemented by the transmitting unit 120a (220 a) and the receiving unit 120b (220 b) physically or logically separated.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, or the like) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

Further, the processor 1001, the memory 1002, and other devices are connected by a bus 1007 for communicating information. The bus 1007 may be configured as a single (single) bus, or may be configured as a different bus between devices.

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

(modification example)

In addition, terms described in the present disclosure and terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, channels, symbols, and signals (signals or signaling) may be substituted for one another. Further, the signal may also be a message. The Reference Signal (Reference Signal) may also be referred to as RS for short, and may also be referred to as Pilot (Pilot), pilot Signal, etc. depending on the applied standard. Further, component Carriers (CCs) may also be referred to as cells, frequency carriers, carrier frequencies, and the like.

A radio frame may also be made up of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more slots in the time domain. The subframe may also be a fixed time length (e.g., 1 ms) independent of a parameter set (numerology).

Here, the parameter set may also refer to a communication parameter applied in at least one of transmission and reception of a certain signal or channel. For example, the parameter set may further indicate at least one of SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission Time Interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by the transceiver in the frequency domain, specific windowing processing performed by the transceiver in the Time domain, and the like.

The time slot may also be formed of one or more symbols in the time domain (Orthogonal Frequency Division Multiplexing (OFDM)) symbols, single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, or the like). Further, the time slot may also be a time unit based on a parameter set.

A timeslot may also contain multiple mini-slots. Each mini-slot may also be made up 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 made up of a fewer number of symbols than a slot. The PDSCH (or PUSCH) transmitted in a time unit larger than the mini-slot may also be referred to as PDSCH (PUSCH) mapping type a. The PDSCH (or PUSCH) transmitted using mini-slots may also be referred to as PDSCH (PUSCH) mapping type B.

The radio frame, subframe, slot, mini-slot, and symbol all represent a unit of time when a signal is transmitted. The radio frame, subframe, slot, mini-slot, and symbol may also use other names corresponding to each. In addition, time units such as frames, subframes, slots, mini-slots, symbols, etc. in the present disclosure may be replaced with one another.

For example, one subframe may also be referred to as TTI, a plurality of consecutive subframes may also be referred to as TTI, and one slot or one mini-slot may also be referred to as TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the conventional LTE, may be a period shorter than 1ms (for example, 1 to 13 symbols), or may be a period longer than 1 ms. The unit indicating TTI may be referred to as a slot, a mini slot, or the like, instead of a subframe.

Here, the TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling for allocating radio resources (such as a frequency bandwidth and transmission power usable by each user terminal) to each user terminal in TTI units. In addition, the definition of TTI is not limited thereto.

The TTI may be a transmission time unit of a channel-coded data packet (transport block), code block, code word, or the like, or may be a processing unit of scheduling, link adaptation, or the like. When a TTI is given, a time interval (for example, the number of symbols) to which transport blocks, code blocks, codewords, and the like are actually mapped may be shorter than the TTI.

In addition, when one slot or one mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) may be the minimum time unit for scheduling. The number of slots (the number of mini-slots) constituting the minimum time unit of the schedule may be controlled.

The TTI having the time length of 1ms 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 slot, and the like. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be replaced with a TTI having a time length exceeding 1ms, and a short TTI (e.g., a shortened TTI, etc.) may be replaced with a TTI having a TTI length smaller than that of the long TTI and equal to or longer than 1 ms.

A Resource Block (RB) is a Resource allocation unit in the time domain and the frequency domain, and may include one or more continuous subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the parameter set, and may be 12, for example. The number of subcarriers included in the RB may also be decided based on the parameter set.

In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, and the like may be formed of one or more resource blocks.

In addition, one or more RBs may also be referred to as a Physical Resource Block (PRB), a subcarrier Group (SCG), a Resource Element Group (REG), a PRB pair, an RB pair, and the like.

Furthermore, a Resource block may also be composed of one or more Resource Elements (REs). For example, one RE may also be a radio resource region of one subcarrier and one symbol.

The Bandwidth Part (BWP) (which may be referred to as a partial Bandwidth or the like) may indicate a subset of consecutive common RBs (common resource blocks) for a certain parameter set in a certain carrier. Here, the common RB may also be determined by an index of an RB with reference to a common reference point of the carrier. PRBs may also be defined in a certain BWP and are numbered within the BWP.

The BWP may include UL BWP (UL BWP) and DL BWP (DL BWP). For the UE, one or more BWPs may also be set within one carrier.

At least one of the set BWPs may be active, and the UE may not expect to transmit and receive a specific signal/channel other than the active BWP. In addition, "cell", "carrier", and the like in the present disclosure may also be replaced with "BWP".

The above-described structures of radio frames, subframes, slots, mini-slots, symbols, and the like are merely examples. For example, the configuration such as the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of subcarriers included in an RB, and the number of symbols, symbol length, cyclic Prefix (CP) length in a TTI can be variously changed.

The information, parameters, and the like described in the present disclosure may be expressed as absolute values, relative values to specific values, or other corresponding information. For example, the radio resource may also be indicated by a specific index.

In the present disclosure, the names used for the parameters and the like are not limitative names in all aspects. Further, the mathematical expressions and the like using these parameters may also 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 thus, the various names assigned to these various channels and information elements are not limitative names in all aspects.

Information, signals, and the like described in the present disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.

Further, information, signals, and the like can be output in at least one direction of: from a higher layer (upper layer) to a lower layer (lower layer) and from a lower layer to a higher layer. Information, signals, and the like may be input and output via a plurality of network nodes.

The input/output information, signals, and the like may be stored in a specific location (for example, a memory) or may be managed by a management table. The inputted and outputted 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 transmitted to other devices.

The information notification is not limited to the embodiment and embodiment described in the present disclosure, and may be performed by other methods. For example, the Information in the present disclosure may be notified by physical layer signaling (e.g., downlink Control Information (DCI)), uplink Control Information (UCI)), higher 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.

The physical Layer signaling may also be referred to as Layer 1/Layer 2 (L1/L2)) control information (L1/L2 control signal), L1 control information (L1 control signal), and the like. The RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup (RRC Connection Setup) message, an RRC Connection Reconfiguration (RRC Connection Reconfiguration) message, or the like. Further, the MAC signaling may be notified using a MAC Control Element (CE), for example.

Note that the notification of the specific information (for example, the notification of "X") is not limited to an explicit notification, and may be performed implicitly (for example, by not performing the notification of the specific information or by performing the notification of other information).

The decision may be made by a value (0 or 1) represented by one bit, by a true-false value (boolean value) represented by true (true) or false (false), or by a comparison of values (e.g., with a specific value).

Software, whether referred to as software (software), firmware (firmware), middleware-ware (middle-ware), microcode (micro-code), hardware description language, or by other names, should be broadly construed to mean instructions, instruction sets, code (code), code segments (code segments), program code (program code), programs (program), subroutines (sub-program), software modules (software module), applications (application), software applications (software application), software packages (software packages), routines (routines), subroutines (sub-routines), objects (objects), executable files, threads of execution, processes, functions, or the like.

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

The terms "system" and "network" as used in this disclosure can be used interchangeably. "network" may also mean a device (e.g., a base station) included in a network.

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

In the present disclosure, terms such as "Base Station (BS)", "wireless Base Station", "fixed Station (fixed Station)", "NodeB", "eNB (eNodeB)", "gNB (gtnodeb)", "access Point (access Point)", "Transmission Point (TP)", "Reception Point (RP)", "Transmission Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier" can be used interchangeably. There are also cases where a base station is referred to by terms such as macrocell, smallcell, femtocell, picocell, and the like.

A base station can accommodate one or more (e.g., three) cells. When a base station accommodates a plurality of cells, the entire coverage area of the base station can be divided into a plurality of smaller areas, and each smaller area can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a portion or the entirety of the coverage area of at least one of a base station and a base station subsystem that is in communication service within the coverage area.

In the present disclosure, terms such as "Mobile Station (MS)", "User terminal (User terminal)", "User Equipment (UE))", "terminal" and the like can be used interchangeably.

There are also instances when a mobile station is referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless communications device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset (hand set), user agent, mobile client, or some other appropriate terminology.

At least one of the base station and the mobile station may also be referred to as a transmitting apparatus, a receiving apparatus, a wireless communication apparatus, and the like. At least one of the base station and the mobile station may be a device mounted on a mobile body, a mobile body main body, or the like. The moving body may be a vehicle (e.g., a vehicle, an airplane, etc.), may be a moving body that moves in an unmanned manner (e.g., a drone (drone), an autonomous vehicle, etc.), or may be a robot (manned or unmanned). In addition, at least one of the base station and the mobile station 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 be an Internet of Things (IoT) device such as a sensor.

In addition, the base station in the present disclosure may also be replaced with a user terminal. For example, the various aspects/embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (e.g., which may also be referred to as Device-to-Device (D2D)), car networking (V2X), and the like). In this case, the user terminal 20 may have the functions of the base station 10 described above. Also, terms such as "upstream" and "downstream" may be replaced with terms corresponding to inter-terminal communication (e.g., "side"). For example, the uplink channel, the downlink channel, and the like may be replaced with the side channel.

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

In the present disclosure, the operation performed by the base station is sometimes performed by an upper node (upper node) of the base station, depending on the case. Obviously, in a network including one or more network nodes (network nodes) having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (for example, considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), and the like, but not limited thereto), or a combination thereof.

The embodiments and modes described in the present disclosure may be used alone, may be used in combination, or may be switched to use with execution. Note that, the processing procedures, sequences, flowcharts, and the like of the embodiments and embodiments described in the present disclosure may be reversed in order unless contradictory. For example, elements of various steps are presented in an exemplary order for a method described in the present disclosure, but the present invention is not limited to the specific order presented.

The aspects/embodiments 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, fourth generation Mobile communication System (4G)), fifth generation Mobile communication System (5G), sixth generation Mobile communication System (6G), x generation Mobile communication System (xG) (x is an integer, decimal), future Radio Access (Future Radio Access (FRA)), new Radio Access Technology (New-Radio Access (RAT), new Radio Access System (IEEE 802-Radio Access (RAT)), new Radio Access System (IEEE 802-Radio Access (Radio Access System)), new Radio Access (Radio Access System (IEEE 802-802)), new Radio Access System (Radio Access System, radio Access System (RAT)), new Radio Access System (Radio Access System, etc.), multiple systems may also be applied in combination (e.g., LTE or LTE-a, combination with 5G, etc.).

The term "based on" used in the present disclosure does not mean "based only" unless otherwise specified. In other words, the expression "based on" means both "based only on" and "based at least on".

Any reference to the use of the terms "first," "second," etc. in this disclosure does not fully define the amount or order of such elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, references to first and second elements do not imply that only two elements may be employed or that the first element must somehow override the second element.

The term "determining" used in the present disclosure may include various operations. For example, "determination (decision)" may be a case where determination (judging), calculation (calculating), calculating (computing), processing (processing), derivation (differentiating), investigation (investigating), search (looking up), search, inquiry) (for example, a search in a table, a database, or another data structure), confirmation (authenticating), or the like is regarded as a case where "determination (decision)" is performed.

The "determination (decision)" may be a case where reception (e.g., reception information), transmission (e.g., transmission information), input (input), output (output), access (access) (e.g., access to data in a memory), and the like are regarded as "determination (decision)".

The "determination (decision)" may be a case where the solution (resolving), selection (selecting), selection (breathing), establishment (evaluating), comparison (comparing), and the like are regarded as the "determination (decision)" to be performed. That is, the "judgment (decision)" may be a case where some actions are regarded as being performed.

The "determination (decision)" may be replaced with "assumption", "expectation", "consideration", and the like.

The "maximum transmission power" in the present disclosure may refer to a maximum value of transmission power, a nominal maximum transmission power (the nominal UE maximum transmission power), and a nominal maximum transmission power (the rated UE maximum transmission power).

The terms "connected", "coupled", or any variant thereof, as used in this disclosure, mean all connections or couplings, direct or indirect, between two or more elements, and can encompass the presence of one or more intervening elements between two elements that are "connected" or "coupled" to each other. The combination or connection between the elements may be physical, logical, or a combination thereof. For example, "connect" may also be replaced with "access".

In the present disclosure, where two elements are connected, it is contemplated that they may be "connected" or "joined" to each other using more than one wire, cable, printed electrical connection, or the like, as well as using electromagnetic energy having a wavelength in the wireless frequency domain, the microwave region, the optical (both visible and invisible) region, or the like, as a few non-limiting and non-limiting examples.

In the present disclosure, the term "a is different from B" may 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", "combine", and the like are also to be construed as similar to "different".

In the present disclosure, the terms "include", "including" and variations thereof mean an inclusive meaning as in the term "comprising". Further, the term "or" used in the present disclosure does not mean exclusive or.

In the present disclosure, for example, in the case where articles are added by translation as in a, an, and the in english, the present disclosure may also include the case where nouns following these articles are plural.

Although the invention according to the present disclosure has been described in detail above, it will be apparent to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the invention defined by the claims. Accordingly, the description of the present disclosure is intended to be illustrative, and not to limit the invention in any way.

Claims (6)

1. A terminal, having:

a control unit configured to determine transmission power of a signal for an antenna point included in an antenna group based on a power control parameter associated with the antenna group; and

a transmission unit that transmits the signal based on the transmission power.

2. The terminal of claim 1, wherein,

when orthogonalization is applied to signals for antenna points included in the antenna group, the control unit uses common transmission power control for signals for a plurality of antenna points to which the orthogonalization is applied.

3. The terminal of claim 1 or claim 2,

in the case where orthogonalization is not applied to signals for antenna points included in the antenna group, the control unit uses independent transmission power control for each of signals for a plurality of antenna points to which the orthogonalization is applied.

4. The terminal of any of claims 1-3,

the control unit decides a beam for transmitting the signal based on the power control parameter.

5. A wireless communication method for a terminal, comprising:

a step of deciding transmission power of a signal for an antenna point included in an antenna group based on a power control parameter associated with the antenna group; and

a step of transmitting the signal based on the transmission power.

6. A base station having:

a transmission unit configured to transmit a power control parameter for determining transmission power of a signal for an antenna point included in an antenna group; and

a reception unit that receives the signal transmitted based on the transmission power.

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