WO2023013003A1

WO2023013003A1 - Terminal, wireless communication method, and base station

Info

Publication number: WO2023013003A1
Application number: PCT/JP2021/029223
Authority: WO
Inventors: 春陽越後; 浩樹原田; 祐輝松村; 尚哉芝池; 聡永田
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2023-02-09
Also published as: JPWO2023013003A1

Abstract

A terminal according to one aspect of the present disclosure includes a reception unit for receiving a MAC CE (Medium Access Control control element) including a field indicating a period of time before activation of a spatial relation with reference to certain timing, and a control unit for controlling activation of the spatial relation on the basis of the MAC CE. According to one aspect of the present disclosure, favorable maintenance of communication quality can be attained.

Description

Terminal, wireless communication method and base station

The present disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems.

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

LTE successor systems (for example, 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later) are also being considered. .

Regarding future wireless communication technology, the use of artificial intelligence (AI) technology such as machine learning (ML) is being considered for network/device control and management. For example, AI-assisted beam management using AI-aided estimation is being considered.

However, the specific details of AI-assisted beam management have not yet progressed. If these are not defined appropriately, there is a risk that improvements in communication throughput or communication quality will be suppressed.

Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can achieve preferable maintenance of communication quality.

A terminal according to an aspect of the present disclosure includes a receiving unit that receives a Medium Access Control control element (MAC Control Element (CE)) including a field indicating a time until activation of a spatial relationship based on a certain timing; and a control unit that controls the activation of the spatial relationship based on the MAC CE.

According to one aspect of the present disclosure, preferable maintenance of communication quality can be achieved.

FIG. 1 is a diagram showing an example of beam pattern indication. FIG. 2 is a diagram showing an example of control based on beam pattern instructions. FIG. 3 is a diagram illustrating an example of application timing of a predicted PUCCH spatial relationship indication with one time offset. FIG. 4 is a diagram illustrating an example of application timing of a predicted PUCCH spatial relationship indication including multiple time offsets. 5A and 5B are diagrams showing an example of a predicted PUCCH spatial relationship indication MAC CE. FIG. 6 is a diagram showing an example of the predicted SRS spatial relationship indication MAC CE. FIG. 7 is a diagram showing an example of TCI state indication MAC CE for predicted PDCCH. 8A and 8B are diagrams showing an example of a TCI state indication MAC CE for predicted PDSCH. 9A and 9B are diagrams illustrating an example of quantized spatial relationship/time to activate TCI state information. 10A and 10B are diagrams showing an example of the length of time available. FIG. 11 is a diagram illustrating an example of a schematic configuration of a radio communication system according to an embodiment. FIG. 12 is a diagram illustrating an example of the configuration of a base station according to one embodiment. FIG. 13 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment; FIG. 14 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to an embodiment.

(Application of artificial intelligence (AI) technology to wireless communication)
As for future wireless communication technology, utilization of AI technology for control and management of networks/devices is under consideration.

For example, for future wireless communication technologies, especially in communications using beams, it is desired to improve the accuracy of channel estimation (also referred to as channel measurement) for beam management, decoding of received signals, and the like. .

Channel estimation, for example, Channel State Information Reference Signal (CSI-RS), Synchronization Signal (SS), Synchronization Signal/Physical Broadcast Channel (SS/PBCH )) block, demodulation reference signal (DMRS), measurement reference signal (SRS), or the like.

Conventional wireless communication technology requires a large amount of estimation resources (for example, resources for transmitting reference signals) in order to perform highly accurate channel estimation. was necessary. If resources such as DMRS and CSI-RS are increased to achieve highly accurate channel estimation, resources for data transmission and reception (for example, physical downlink shared channel (PDSCH)) resources, uplink shared The channel (Physical Uplink Shared Channel (PUSCH) resource) will decrease.

Also, with conventional wireless communication technology, it was possible to control based on current or past measurement results, but when the wireless quality deteriorated and the link was disconnected, the response would be delayed.

In the future, it will be considered to use AI technology such as machine learning (ML) to achieve high-precision channel estimation with fewer resources and measurements that predict the future. Such channel estimation may be called AI-aided estimation. Beam management that utilizes AI-assisted estimation may be referred to as AI-assisted beam management.

As an example of AI-assisted beam management, when AI is used in terminals (also called user terminals, User Equipment (UE), etc.), AI may predict future beam measurements. The UE may also trigger enhanced beam failure recovery (enhanced BFR) with prediction.

As an example of AI-assisted beam management, if AI is utilized at the Base Station (BS), the AI may predict future beam measurements (e.g. narrow beam measurements) However, narrow beam measurements may be estimated (derived) based on a small number of beam management. The UE may also receive beam indications with time offsets.

Therefore, the inventors came up with a control method suitable for beam indication with a time offset. According to this, since the UE can suitably follow the beam, it is possible to suitably maintain the communication quality. Note that each embodiment of the present disclosure may be applied when AI/prediction is not utilized.

In one embodiment of the present disclosure, the UE/BS trains the ML model in training mode and implements the ML model in test mode (also called test mode, testing mode, etc.). In the test mode, validation of the accuracy of the trained ML model in the training mode may be performed.

In the present disclosure, the UE/BS inputs channel state information, reference signal measurements, etc. to the ML model to obtain highly accurate channel state information/measurements/beam selection/position, future channel state information / Radio link quality etc. may be output.

It should be noted that in the present disclosure, AI may be read as an object (also called object, object, data, function, program, etc.) having (implementing) at least one of the following characteristics:
Estimates based on observed or collected information;
- Choices based on information observed or collected;
• Predictions based on observed or collected information.

In the present disclosure, the object may be, for example, a terminal, a device such as a base station, or a device. Also, the object may correspond to a program included in the device.

Also, in this disclosure, an ML model may be read as an object that has (enforces) at least one of the following characteristics:
Generating an estimate by feeding,
Informed to predict estimates;
・Discover characteristics by giving information,
• Selecting actions by giving information.

Also, in the present disclosure, the ML model may be read as at least one of AI model, predictive analytics, predictive analysis model, and the like. Also, the ML model may be derived using at least one of regression analysis (e.g., linear regression analysis, multiple regression analysis, logistic regression analysis), support vector machines, random forests, neural networks, deep learning, and the like. In this disclosure, model may be translated as at least one of encoder, decoder, tool, and the like.

　The ML model outputs at least one information such as estimated value, predicted value, selected action, classification, etc., based on the input information.

The ML model may include supervised learning, unsupervised learning, reinforcement learning, etc. Supervised learning may be used to learn general rules that map inputs to outputs. Unsupervised learning may be used to learn features of data. Reinforcement learning may be used to learn actions to maximize a goal.

Each embodiment described later will be mainly described assuming that supervised learning is used in the ML model, but it is not limited to this.

In the present disclosure, implementation, operation, operation, execution, etc. may be read interchangeably. Also, in the present disclosure, testing, after-training, production use, actual use, etc. may be read interchangeably. A signal may be interchanged with signal/channel.

In the present disclosure, the training mode may correspond to the mode in which the UE/BS transmits/receives signals for the ML model (in other words, the mode of operation during training). In the present disclosure, the test mode corresponds to the mode in which the UE/BS implements the ML model (e.g., implements the trained ML model to predict the output) (in other words, the operating mode during the test). good.

In the present disclosure, training mode may refer to a mode in which a specific signal transmitted in test mode has a large overhead (eg, a large amount of resources) is transmitted.

In the present disclosure, training mode may refer to a mode that refers to a first configuration (eg, first DMRS configuration, first CSI-RS configuration). In the present disclosure, test mode may refer to a mode that refers to a second configuration (eg, second DMRS configuration, second CSI-RS configuration) different from the first configuration. At least one of time resources, frequency resources, code resources, and ports (antenna ports) related to measurement may be set more in the first setting than in the second setting.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The wireless communication method according to each embodiment may be applied independently, or may be applied in combination.

In the following embodiments, the UE and the BS are the relevant subjects in order to explain the ML model for communication between the UE and the BS, but the application of each embodiment of the present disclosure is not limited to this. For example, for communication between different entities (eg, UE-UE communication), UE and BS in the following embodiments may be read as first UE and second UE. In other words, any UE, BS, etc. in this disclosure may be read as any UE/BS.

In the present disclosure, "A/B" and "at least one of A and B" may be read interchangeably.

In the present disclosure, activate, deactivate, indicate (or indicate), select, configure, update, determine, etc. may be read interchangeably. In the present disclosure, supporting, controlling, controllable, operating, and capable of operating may be read interchangeably.

In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, information elements (IEs), and settings may be read interchangeably. In the present disclosure, Medium Access Control Control Element (MAC Control Element (CE)), update command, and activation/deactivation command may be read interchangeably.

In the present disclosure, panel, UE panel, panel group, beam, beam group, precoder, Uplink (UL) transmitting entity, Transmission/Reception Point (TRP), Spatial Relation Information (SRI)), Spatial relationship, SRS resource indicator (SRI), SRS resource, control resource set (COntrol resource SET (CORESET)), physical downlink shared channel (PDSCH), codeword, base station, given antenna port (for example , demodulation reference signal (DeModulation Reference Signal (DMRS) port), predetermined antenna port group (for example, DMRS port group), predetermined group (for example, code division multiplexing (CDM)) group, predetermined reference signal group, CORESET group), predetermined resource (e.g., predetermined reference signal resource), predetermined resource set (e.g., predetermined reference signal resource set), CORESET pool, physical uplink control channel (PUCCH )) group (PUCCH resource group), spatial relationship group, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state (unified TCI state), common TCI state (common TCI state), Quasi-Co-Location (QCL), QCL assumption, etc. may be read interchangeably.

In the present disclosure, indexes, IDs, indicators, and resource IDs may be read interchangeably. In the present disclosure, sequences, lists, sets, groups, groups, clusters, subsets, etc. may be read interchangeably.

In the present disclosure, CSI-RS refers to Non Zero Power (NZP) CSI-RS, Zero Power (ZP) CSI-RS and CSI Interference Measurement (CSI-IM)). At least one may be read interchangeably.

In the present disclosure, measured/reported RS may mean RS measured/reported for predicted BFR.

(Wireless communication method)
In the following embodiments, the UE may be informed of beam pointing with time offset. A beam instruction with a time offset may correspond to a beam instruction corresponding to each of a plurality of times. Hereinafter, the terms "beam indication with time offset", "multiple beam indication", "beam pattern indication", "predicted beam indication", "sequential beam indication", "extended beam indication", etc. may be interchanged with each other.

A time offset may mean the time to activation of a spatial relationship/TCI state (to apply the activation) relative to some timing.

FIG. 1 is a diagram showing an example of beam pattern instructions. In this example, the BS with AI is transmitting three CSI-RS (CSI-

RS

1, 2, 3), the signal from the UE (eg SRS)/beam measurement result (eg CSI beam report) , predict future beam quality (eg, reception quality at the UE for each CSI-RS).

A base station may send a one-shot beam pattern indication containing information for one or more beams over one or more time periods based on future beam quality.

The beam pattern instructions in FIG. CSI-RS3 is shown for time offset #3). This may correspond to the beam that is expected to have the highest reception quality at the UE at each time. The UE shown is moving in the direction of the dashed line, and the base station took this into account when generating the beam pattern indication.

FIG. 2 is a diagram showing an example of control based on beam pattern instructions. The UE may apply (use, assume) a beam for each time instant (time corresponding to each time offset) according to the received beam pattern indication.

In this example, the UE receives the MAC CE indicating the beam pattern indication on the PDSCH and transmits an ACK (eg, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK)) for this reception. At the timing when a certain period of time (in the figure, 3*the number of slots per subframe for setting the corresponding SubCarrier Spacing (SCS), in other words 3 ms) has passed since this ACK transmission, the UE sends the CSI-RS1 Apply the TCI state/spatial relationship #0 corresponding to . Also, the UE applies the TCI state/spatial relationship #1 corresponding to CSI-RS2 after the time offset #1 has elapsed from the above timing, and the TCI state corresponding to CSI-RS3 after the time offset #2 has elapsed from the above timing. / spatial relationship #2 may be applied.

In addition, in the present disclosure, timing, time, time, slot, subslot, symbol, subframe, etc. may be read interchangeably.

The following embodiments relate to the content, processing, application timing, etc. of beam pattern instructions.

<First Embodiment>
The first embodiment relates to beam pattern indication for PUCCH. The indication is Predicted PUCCH spatial relation Activation/Deactivation MAC CE (Predicted PUCCH spatial relation Activation/Deactivation MAC CE), PUCCH spatial relation activation/deactivation MAC CE with time offset, Predicted PUCCH spatial relation It may also be called an indication MAC CE, a predicted PUCCH spatial relationship indication, and so on.

[Embodiment 1.1]
The predicted PUCCH spatial relationship indication may contain only one time offset. In this case, the UE may apply the predicted PUCCH spatial relationship indication (activation command) after any of the following times relative to the reference timing:
・time offset,
• Time offset + X* (number of slots per subframe for the corresponding SCS setting).

Here, the reference timing may be the timing (end) at which the UE transmits PUCCH with HARQ-ACK corresponding to the PDSCH that transmits the activation command, or the UE transmits the PDSCH that transmits the activation command. It may be the timing (end) of receiving, or the timing obtained by adding X* (the number of slots per subframe for setting the corresponding SCS) to any of these timings.

In addition, even when the timing of receiving the PDSCH that transmits the activation command is used as the reference timing, the UE uses the reference timing as a reference time offset (or time offset + X * (for the corresponding SCS setting A first timing when the number of slots per subframe)) has passed, and a second timing when a certain period has passed based on the timing of transmitting PUCCH having HARQ-ACK corresponding to the PDSCH that transmits the activation command. , and if the first timing is earlier than the second timing, the activation command may be applied at the second timing. In this case, it is possible to prevent the spatial relationship of the PUCCH from changing before the transmission of the PUCCH. Note that this fixed period may be X* (the number of slots per subframe for setting the corresponding SCS), may be a time offset, or may be a time offset + X* (for setting the corresponding SCS). number of slots per subframe).

Note that the UE may determine the value of X based on a specific rule, physical layer signaling (eg, DCI), higher layer signaling (eg, RRC signaling, MAC CE), a specific signal/ It may be determined based on the channel, or a combination thereof, or may be determined based on the UE capabilities. X may be 3, for example.

It should be noted that the UE may apply the activation command in a specific slot (eg, the first slot, the first UL slot) after any of the above times has passed based on the reference timing.

FIG. 3 is a diagram showing an example of application timing of a predicted PUCCH spatial relationship indication including one time offset. In this example, the reference timing is the timing at which the UE sends HARQ-ACK corresponding to the activation command.

The illustrated time A is the time of application of the activation command when it is applied after the time offset has passed with reference to the reference timing. In addition, the time B shown is the application of the activation command after the time offset + 3* (the number of slots per subframe for setting the corresponding SCS) has elapsed with reference to the reference timing. It's time for

[Embodiment 1.2]
The predicted PUCCH spatial relationship indication may include multiple time offsets. The predicted PUCCH spatial relationship indication may include spatial settings (spatial relationship information) corresponding to each time offset.

Note that the time offset may be an absolute time offset. In this case, the spatial relationship information corresponding to a certain time offset may be applied after the time offset has passed with reference to the reference timing. The reference timing corresponds to time offset=0.

Also, the time offset may be a relative (differential) time offset. In this case, the spatial relationship information corresponding to a certain time offset is one of the reference timing and the timing at which the spatial relationship information corresponding to another time offset is applied (the last application of the activation command). It may be applied after the time offset has passed with reference to the closer one (the one with the latest time). In other words, the spatial relationship information corresponding to a certain time offset may be applied after the sum of the time offset and another time offset has elapsed relative to the reference timing.

FIG. 4 is a diagram showing an example of application timing of a predicted PUCCH spatial relationship indication including multiple time offsets. The example is similar to FIG. 2, but where the time offset is an absolute time offset, time offset #2 is the length of period A shown, and time offset is a relative time offset. In some cases, time offset #2 is the length of period B shown.

[Embodiment 1.3]
The UE may determine the time offset based on specific rules, physical layer signaling (e.g. DCI), higher layer signaling (e.g. RRC signaling, MAC CE), specific signals/channels, or may be determined based on the combination of , or may be determined based on the UE capability.

For example, the UE may be configured with a time offset per spatial relationship information/per PUCCH resource according to the RRC parameters. The UE may assume that no time offset is applied (or apply time offset = 0) to spatial related information/PUCCH resources for which no time offset is configured, or a default time offset may be applied. .

The default time offset may be determined based on a specific rule, may correspond to a specific time offset among the set time offsets, or may be determined based on the UE capabilities.

Embodiment 1.3, in which the time offset is set for each spatial relationship information/PUCCH resource, is suitable when the UE moves along a fixed route (for example, when riding a train).

[Embodiment 1.4]
5A and 5B are diagrams illustrating an example of a predicted PUCCH spatial relationship indication MAC CE. The MAC CE may include a Serving Cell ID field, a BWP ID field, a PUCCH resource ID field, a spatial relationship ID (or S _i ) field, a C field, a slot offset field, and so on.

The serving cell ID field may be a field for indicating the serving cell to which the MAC CE is applied. The BWP ID field may be a field for indicating the UL BWP to which the MAC CE is applied.

The PUCCH resource ID field may indicate the ID (Identifier) of the PUCCH resource whose spatial relationship is activated by the spatial relationship information.

The Spatial Relation ID field indicates the Spatial Relation ID (eg, PUCCH-SpatialRelationInfoId) of the spatial relation to be activated. The S _i field indicates the spatial relation to be activated/deactivated and corresponds to the spatial relation of Spatial Relation ID (PUCCH-SpatialRelationInfoId) i (or i+1). For example, an S _i field of '1' may indicate activation.

The slot offset field may indicate the time offset that activates the spatial relationship.

The C field may indicate whether there is a spatial relationship ID (or S _i ) field (or another spatial setting) after this C field. For example, if the C field value is '1', it indicates that there is an octet including the spatial relationship ID (or S _i ) field after this C field, and if the C field value is '0' , it may mean that there are no octets containing the Spatial Relationship ID (or S _i ) field after this C field.

FIG. 5A shows an example in which one or more pairs of slot offset fields and corresponding _Si fields are included for a PUCCH resource indicated by a PUCCH resource ID field.

FIG. 5B shows an example in which one or more sets of PUCCH resource ID fields and corresponding spatial relationship ID fields are included per slot offset field. In this case, different spatial relationships can be activated for multiple PUCCH resources at the timing of the time offset indicated by the slot offset field. Also, the illustrated spatial configuration #0 and spatial configuration #1 may correspond to different time offsets (spatial configuration #0 corresponds to slot offset #0 indicated by the first slot offset field, spatial configuration #1 may correspond to slot offset #1 indicated by the second slot offset field). Spatial configuration may correspond to the configuration of PUCCH resource corresponding to one slot offset and the corresponding relationship of spatial relationship.

The predicted PUCCH spatial relationship indication MAC CE may include a field indicating the cell to which the spatial relationship information belongs. For example, if spatial relationship information is set for each cell, the MAC CE may include a field for determining a cell ID such as a Physical Cell ID (PCI). The PCI may be selected from PCI candidates configured by RRC.

A predicted PUCCH spatial relationship indication MAC CE may include a field indicating how many time instants (time offsets) exist in the MAC CE, a field indicating whether a specific octet exists, and the like.

The UE may determine that the size of the predicted PUCCH spatial relationship indication MAC CE is fixed (predetermined), may determine based on RRC parameters, or may determine based on MAC CE fields You can judge.

The RRC parameter may be at least one of the maximum number of spatial relationship information, the maximum number of PUCCH resources, the number of time instants in MAC CE, and the like.

The above MAC CE fields may correspond to at least one of the following:
information indicating whether an octet is present in this MAC CE (e.g. the C field mentioned above);
- A number indicated by a field (eg, a field indicating the number of spatial configurations contained in the MAC CE).

According to the first embodiment described above, beam pattern indication using predicted PUCCH spatial relationship indication can be appropriately implemented.

<Second embodiment>
A second embodiment relates to beam pattern indication for SRS. The indications are: Predicted Enhanced SP/AP SRS Spatial Relation Indication MAC CE (Predicted Enhanced SP/AP SRS Spatial Relation Indication MAC CE), SP/AP SRS Spatial Relation Indication MAC CE with time offset, Predicted SRS Spatial Relation Indication It may also be called MAC CE, predictive SRS spatial relationship indication, and the like. Note that SP/AP means semipersistent/aperiodic.

As the second embodiment, an embodiment in which PUCCH is read as SRS in Embodiments 1.1-1.4 can be used, so redundant description will not be repeated.

Note that the Resource ID _i field corresponds to the field that specifies the spatial relationship. The Resource ID _i field is the resource ID (eg, SSB index, SRS resource ID).

FIG. 6 is a diagram showing an example of the predicted SRS spatial relationship indication MAC CE. Except for C field and slot offset field, Rel. 16 extended SP/AP SRS spatial relationship indication MAC CE, so description of each field is omitted. Spatial relationships corresponding to SRS resources for each slot offset can be specified, similar to that shown in FIGS. 5A and 5B.

According to the second embodiment described above, it is possible to appropriately perform beam pattern indication using predicted SRS spatial relationship indication.

<Third Embodiment>
A third embodiment relates to beam pattern indication for a physical downlink control channel (PDCCH). The indications are Predicted TCI State Indication for UE-specific PDCCH MAC CE, TCI State Indication MAC CE for PDCCH with time offset, TCI State Indication MAC CE for predicted PDCCH. , TCI status indication for predicted PDCCH, etc.

As a third embodiment, there is an embodiment in which PUCCH in Embodiments 1.1-1.4 is replaced with PDCCH, PUCCH resource with CORESET (or CORESET ID), spatial relationship with TCI state applicable to CORESET, etc. available, so redundant descriptions are not repeated.

FIG. 7 is a diagram showing an example of TCI state indication MAC CE for predicted PDCCH. Except for C field and slot offset field, Rel. Since it is the same as the UE-specific PDCCH TCI status indication MAC CE of 2015/16, the description of each field is omitted. Similar to that shown in FIGS. 5A and 5B, the TCI state corresponding to the CORESET (CORESET ID) for each slot offset can be specified.

According to the third embodiment described above, the beam pattern indication using the predicted PDCCH TCI state indication can be appropriately performed.

<Fourth Embodiment>
The fourth embodiment relates to beam pattern indication for PDSCH. The indication is Predicted (Enhanced) TCI States Activation/Deactivation for UE-specific PDSCH MAC CE, TCI for PDSCH with time offset It may also be called a state indication MAC CE, a TCI state indication MAC CE for predicted PDSCH, a TCI state indication for predicted PDSCH, and the like.

As the fourth embodiment, it is possible to use embodiments 1.1 to 1.4 in which PUCCH is replaced with PDSCH and the spatial relationship is replaced with the TCI state, etc., so redundant description will not be repeated.

　Figures 8A and 8B are diagrams showing an example of a predicted PDSCH TCI state indication MAC CE. Except for C field and slot offset field, Rel. 15/16 UE-specific PDSCH TCI state activation/deactivation MAC CE and extended UE-specific PDSCH TCI state activation/deactivation MAC CE are the same, so the description of each field is omitted. Similar to that shown in Figures 5A and 5B, the TCI state for the PDSCH per slot offset can be specified.

According to the fourth embodiment described above, the beam pattern indication using the predicted PDSCH TCI state indication can be appropriately performed.

<Fifth Embodiment>
A fifth embodiment relates to the time offset specified by the MAC CE of the first to fourth embodiments.

　Figures 9A and 9B are diagrams showing an example of information on the time to activate the quantized spatial relationship/TCI state.

The UE may be notified by MAC CE of a bit field (time offset field) indicating one time offset selected from the set time offsets. In FIG. 9A, it is assumed that the UE is configured with four time offsets (12, 14, 16 and 18 slots) corresponding to each bitfield using RRC parameters.

Note that the UE may not receive information about the time to activate the spatial relationship/TCI state if only one time offset is configured (the base station knows the time offset the UE expects). For).

The UE may receive a bit field indicating one time offset selected from the predefined time offsets as information of the time to activate the spatial relationship/TCI state. In FIG. 9B, the four time offsets (2, 4, 6 and 8 slots) corresponding to each bit field may be predefined by the specification, for example.

Note that when the UE handles time offsets, the UE may determine the time duration available for prediction based on the time offsets. There may be one or more times during that length of time to activate the spatial relationship/TCI state.

In the present disclosure, the UE may report/receive/determine/configure a time offset and a window size instead of a time offset to determine the length of time.

The UE may activate the spatial relationship/TCI state at specific time instants (eg, specific slots) during the length of time specified by the time offset and window size.

Also, in the present disclosure, the UE may report/receive/determine/configure two time offsets instead of one time offset to determine the length of time.

The UE may activate the spatial relationship/TCI state at specific time instants (eg, specific slots) between the length of time specified by the two time offsets.

FIGS. 10A and 10B are diagrams showing examples of available time lengths.

FIG. 10A shows an example in which the time length is specified by the time offset and window size. The length of time may be at least one of the periods AC shown. A period A is a window size period (a period after the point) starting from a point (time T) specified by a time offset with respect to the reference time. A period B is a period of a window size width (a period before the point) ending at a point (time T) specified by a time offset with respect to the reference time. A period C is a period of the window size width centered on the point (time T) specified by the time offset with respect to the reference time (including the period before and after the point).

FIG. 10B shows an example in which the time length is specified by two time offsets (first time offset, second time offset). The length of time may be the period shown. This period starts at one of a point specified by a first time offset relative to the reference time and a point specified by a second time offset relative to the reference time, and ends at the other. It is a period of time. The length of this period may be expressed as ZX, for example, where the second time offset (eg, Z slots) > the first time offset (eg, X slots).

According to the fifth embodiment described above, the time offset can be specified appropriately.

<Others>
At least one of the embodiments described above may only be applied to UEs that have reported or support a particular UE capability.

The specific UE capabilities may indicate at least one of the following:
- Whether or not to support specific operations/information for each embodiment;
the maximum number of time instants that can be included in one MAC CE (per MAC CE type);
- the maximum time offset for the spatial relationship,
- maximum time offset for TCI state for PDSCH,
• Maximum time offset for TCI state (per CORESET/per CORESET pool/per all CORESET (pool)) for PDCCH.

The UE capabilities may be reported per frequency, or may be reported per frequency range (eg, Frequency Range 1 (FR1), Frequency Range 2 (FR2), FR2-1, FR2-2) , may be reported for each cell, may be reported for each UE, or may be reported for each subcarrier spacing (SCS).

The above UE capabilities may be reported commonly for Time Division Duplex (TDD) and Frequency Division Duplex (FDD), or may be reported independently.

Also, at least one of the above embodiments may be applied if the UE is configured with specific information related to the above embodiments by higher layer signaling. For example, the specific information may be information indicating to enable beam pattern indication, any RRC parameters for a specific release (eg, Rel. 18), or the like.

(wireless communication system)
A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. 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. 11 is a diagram showing an example of a schematic configuration of a wireless communication system according to one embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by the Third Generation Partnership Project (3GPP). .

The wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)), etc. may be included.

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

The wireless communication system 1 has dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC) in which both MN and SN are NR base stations (gNB) )) may be supported.

A wireless communication system 1 includes a base station 11 forming a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) arranged in the macrocell C1 and forming a small cell C2 narrower than the macrocell C1. You may prepare. A user terminal 20 may be located within at least one cell. The arrangement, number, etc. of each cell and user terminals 20 are not limited to the embodiment shown in the figure. Hereinafter, the

base stations

11 and 12 are collectively referred to as the base station 10 when not distinguished.

The user terminal 20 may connect to at least one of the multiple base stations 10 . The user terminal 20 may utilize at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

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

Also, the user terminal 20 may communicate using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

A plurality of base stations 10 may be connected by wire (for example, an optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between the

base stations

11 and 12, the base station 11 corresponding to the upper station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) is an IAB Also called a node.

The base station 10 may be connected to the core network 30 directly or via another base station 10 . The core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), and the like.

The user terminal 20 may be a terminal compatible with at least one of communication schemes such as LTE, LTE-A, and 5G.

In the radio communication system 1, a radio access scheme based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of Downlink (DL) and Uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.

A radio access method may be called a waveform. Note that 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 used as the UL and DL radio access schemes.

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

In the radio communication system 1, as uplink channels, an uplink shared channel (PUSCH) shared by each user terminal 20, an uplink control channel (PUCCH), a random access channel (Physical Random Access Channel (PRACH)) or the like may be used.

User data, upper layer control information, System Information Block (SIB), etc. are transmitted by the PDSCH. User data, higher layer control information, and the like may be transmitted by PUSCH. Also, a Master Information Block (MIB) may be transmitted by the PBCH.

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

The DCI that schedules PDSCH may be called DL assignment, DL DCI, etc., and the DCI that schedules PUSCH may be called UL grant, UL DCI, etc. PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

A control resource set (CControl Resource SET (CORESET)) and a search space (search space) may be used for PDCCH detection. CORESET corresponds to a resource searching for DCI. The search space corresponds to the search area and search method of PDCCH candidates. A CORESET may be associated with one or more search spaces. The UE may monitor CORESETs associated with certain search spaces based on the search space settings.

One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting", etc. in the present disclosure may be read interchangeably.

By PUCCH, channel state information (CSI), acknowledgment information (for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.) and scheduling request (Scheduling Request ( SR)) may be transmitted. A random access preamble for connection establishment with a cell may be transmitted by the PRACH.

In addition, in the present disclosure, downlink, uplink, etc. may be expressed without adding "link". Also, various channels may be expressed without adding "Physical" to the head.

In the wireless communication system 1, synchronization signals (SS), downlink reference signals (DL-RS), etc. may be transmitted. In the radio communication system 1, the DL-RS includes a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DeModulation Reference Signal (DMRS)), Positioning Reference Signal (PRS)), Phase Tracking Reference Signal (PTRS)), etc. may be transmitted.

The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called SS/PBCH block, SS Block (SSB), and so on. Note that SS, SSB, etc. may also be referred to as reference signals.

Also, in the radio communication system 1, even if measurement reference signals (SRS), demodulation reference signals (DMRS), etc. are transmitted as uplink reference signals (UL-RS), good. Note that DMRS may also be called a user terminal-specific reference signal (UE-specific reference signal).

(base station)
FIG. 12 is a diagram illustrating an example of the configuration of a base station according to one embodiment. The base station 10 comprises a control section 110 , a transmission/reception section 120 , a transmission/reception antenna 130 and a transmission line interface 140 . One or more of each of the control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission line interface 140 may be provided.

It should be noted that this example mainly shows the functional blocks that characterize the present embodiment, and it may be assumed 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 controls the base station 10 as a whole. The control unit 110 can be configured from a controller, a control circuit, and the like, which are explained based on common recognition in the technical field according to the present disclosure.

The control unit 110 may control signal generation, scheduling (eg, resource allocation, mapping), and the like. The control unit 110 may control transmission/reception, measurement, etc. using the transmission/reception unit 120 , the transmission/reception antenna 130 and the transmission line interface 140 . The control unit 110 may generate data to be transmitted as a signal, control information, a sequence, etc., and transfer them to the transmission/reception unit 120 . The control unit 110 may perform call processing (setup, release, etc.) of communication channels, state management of the base station 10, management of radio resources, and the like.

The transmitting/receiving section 120 may include a baseband section 121 , a radio frequency (RF) section 122 and a measuring section 123 . The baseband section 121 may include a transmission processing section 1211 and a reception processing section 1212 . The transmitting/receiving unit 120 is configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field according to the present disclosure. be able to.

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

The transmitting/receiving antenna 130 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.

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

The transmitting/receiving unit 120 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

The transmission/reception unit 120 (transmission processing unit 1211) performs Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.

The transmission/reception unit 120 (transmission processing unit 1211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (DFT) on the bit string to be transmitted. Processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, transmission processing such as digital-to-analog conversion may be performed, and the baseband signal may be output.

The transmitting/receiving unit 120 (RF unit 122) may perform modulation to a radio frequency band, filter processing, amplification, and the like on the baseband signal, and may transmit the radio frequency band signal via the transmitting/receiving antenna 130. .

On the other hand, the transmitting/receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 130.

The transmission/reception unit 120 (reception processing unit 1212) performs analog-to-digital conversion, Fast Fourier transform (FFT) processing, and Inverse Discrete Fourier transform (IDFT) processing on the acquired baseband signal. )) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing and PDCP layer processing. User data and the like may be acquired.

The transmitting/receiving unit 120 (measuring unit 123) may measure the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, etc. based on the received signal. The measurement unit 123 measures received power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)) , signal strength (for example, Received Signal Strength Indicator (RSSI)), channel information (for example, CSI), and the like may be measured. The measurement result may be output to control section 110 .

The transmission path interface 140 transmits and receives signals (backhaul signaling) to and from devices included in the core network 30, other base stations 10, etc., and user data (user plane data) for the user terminal 20, control plane data, and the like. Data and the like may be obtained, transmitted, and the like.

Note that the transmitter and receiver of the base station 10 in the present disclosure may be configured by at least one of the transmitter/receiver 120, the transmitter/receiver antenna 130, and the transmission line interface 140.

In addition, the transmitting/receiving unit 120 transmits to the user terminal 20 a Medium Access Control control element (MAC Control Element (CE)) including a field indicating the time until activation of the spatial relationship based on a certain timing (reference timing). You may

The control unit 110 may assume that the user terminal 20 controls the activation of the spatial relationship based on the MAC CE, and may perform scheduling/beam control based on this assumption.

In addition, the transmission/reception unit 120 uses a medium access control control element (MAC control element) including a field indicating the time until activation of the transmission configuration indication state (TCI state) based on a certain timing (reference timing). Element (CE)) may be transmitted to the user terminal 20 .

The control unit 110 may assume that the user terminal 20 controls activation of the TCI state based on the MAC CE, and may perform scheduling/beam control based on this assumption.

(user terminal)
FIG. 13 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment; The user terminal 20 includes a control section 210 , a transmission/reception section 220 and a transmission/reception antenna 230 . One or more of each of the control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided.

It should be noted that this example mainly shows the functional blocks of the features of the present embodiment, and it may be assumed 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 controls the user terminal 20 as a whole. The control unit 210 can be configured from a controller, a control circuit, and the like, which are explained based on common recognition in the technical field according to the present disclosure.

The control unit 210 may control signal generation, mapping, and the like. The control unit 210 may control transmission/reception, measurement, etc. using the transmission/reception unit 220 and the transmission/reception antenna 230 . The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission/reception unit 220 .

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

The transmission/reception unit 220 may be configured as an integrated transmission/reception unit, or may be configured from a transmission unit and a reception unit. The transmission section may be composed of a transmission processing section 2211 and an RF section 222 . The receiving section may include a reception processing section 2212 , an RF section 222 and a measurement section 223 .

The transmitting/receiving antenna 230 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.

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

The transmitter/receiver 220 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

The transmission/reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, for data and control information acquired from the control unit 210, for example , HARQ retransmission control), etc., to generate a bit string to be transmitted.

The transmitting/receiving unit 220 (transmission processing unit 2211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), and IFFT processing on a bit string to be transmitted. , precoding, digital-analog conversion, and other transmission processing may be performed, and the baseband signal may be output.

Whether or not to apply DFT processing may be based on transform precoding settings. Transmitting/receiving unit 220 (transmission processing unit 2211), for a certain channel (for example, PUSCH), if transform precoding is enabled, the above to transmit the channel using the DFT-s-OFDM waveform The DFT process may be performed as the transmission process, or otherwise the DFT process may not be performed as the transmission process.

The transmitting/receiving unit 220 (RF unit 222) may perform modulation to a radio frequency band, filter processing, amplification, and the like on the baseband signal, and may transmit the radio frequency band signal via the transmitting/receiving antenna 230. .

On the other hand, the transmitting/receiving section 220 (RF section 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 230.

The transmission/reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (error correction) on the acquired baseband signal. decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.

The transmitting/receiving section 220 (measuring section 223) may measure the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal. The measuring unit 223 may measure received power (eg, RSRP), received quality (eg, RSRQ, SINR, SNR), signal strength (eg, RSSI), channel information (eg, CSI), and the like. The measurement result may be output to control section 210 .

The transmitter and receiver of the user terminal 20 in the present disclosure may be configured by at least one of the transmitter/receiver 220, the transmitter/receiver antenna 230, and the transmission line interface 240.

It should be noted that the transmitting/receiving unit 220 may receive a Medium Access Control control element (MAC Control Element (CE)) containing a field indicating the time until activation of a spatial relationship based on a certain timing (reference timing).

The control unit 210 may control activation of the spatial relationship based on the MAC CE.

The certain timing may be the timing of transmitting an uplink control channel having a Hybrid Automatic Repeat ReQuest ACKnowledgement (HARQ-ACK) corresponding to the downlink shared channel that transmits the MAC CE.

In addition, the transmitting/receiving unit 220 uses a medium access control control element (MAC control element) including a field indicating the time until activation of the transmission configuration indication state (TCI state) based on a certain timing (reference timing). Element (CE)) may be received.

The control unit 210 may control activation of the TCI state based on the MAC CE.

When the field indicating the first time and the field indicating the second time are included in the MAC CE described above, the control unit 210 establishes the first spatial relationship after the first time based on the certain timing. A /TCI state may be activated, and a second spatial relationship /TCI state may be activated after the second time has elapsed based on the certain timing. This may correspond to the case where said field represents an absolute time.

When the field indicating the first time and the field indicating the second time are included in the MAC CE described above, the control unit 210 establishes the first spatial relationship after the first time based on the certain timing. A /TCI state may be activated, and a second spatial relationship /TCI state may be activated after a sum of the first time and the second time relative to the certain timing. This may correspond to the case where said field represents an absolute time.

(Hardware configuration)
It should be noted that the block diagrams used in the description of the above embodiments show blocks in units of functions. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the method of implementing each functional block is not particularly limited. That is, each functional block may be implemented using one device that is physically or logically coupled, or directly or indirectly using two or more devices that are physically or logically separated (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices. A functional block may be implemented by combining software in the one device or the plurality of devices.

where function includes judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deem , broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. Not limited. For example, a functional block (component) that performs transmission may be called a transmitting unit, a transmitter, or the like. In either case, as described above, the implementation method is not particularly limited.

For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 14 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to an embodiment. The base station 10 and user terminal 20 described above 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 the present disclosure, terms such as apparatus, circuit, device, section, and unit can be read interchangeably. The hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without some devices.

For example, although only one processor 1001 is illustrated, there may be multiple processors. Also, processing may be performed by one processor, or processing may be performed by two or more processors concurrently, serially, or otherwise. Note that processor 1001 may be implemented by one or more chips.

Each function in the base station 10 and the user terminal 20, for example, by loading predetermined software (program) on hardware such as a processor 1001 and a memory 1002, the processor 1001 performs calculations, communication via the communication device 1004 and at least one of reading and writing data in the memory 1002 and the storage 1003 .

The processor 1001, for example, operates an operating system and controls the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like. For example, at least part of the above-described control unit 110 (210), transmission/reception unit 120 (220), etc. may be realized by the processor 1001. FIG.

Also, the processor 1001 reads programs (program codes), software modules, data, etc. 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 part of the operations described in the above embodiments is used. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be similarly implemented.

The memory 1002 is a computer-readable recording medium, such as Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or at least any other suitable storage medium. may be configured by one. The memory 1002 may also be called a register, cache, main memory (main storage device), or the like. The memory 1002 can store executable programs (program code), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray disc), removable disc, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium may be configured by Storage 1003 may also be called an auxiliary storage device.

The communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 includes a high-frequency switch, duplexer, filter, frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD), for example. may be configured to include For example, the transmitting/receiving unit 120 (220), the transmitting/receiving antenna 130 (230), and the like described above may be realized by the communication device 1004. FIG. The transmitter/receiver 120 (220) may be physically or logically separated into a transmitter 120a (220a) and a receiver 120b (220b).

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

Each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between devices.

In addition, the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured including hardware, and a part or all of each functional block may be realized using the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

(Modification)
The terms explained in this disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol and signal (signal or signaling) may be interchanged. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, a pilot signal, etc., depending on the applicable standard. A component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, or the like.

A radio frame may consist of one or more periods (frames) in the time domain. Each of the one or more periods (frames) that make up a radio frame may be called a subframe. Furthermore, a subframe may consist of one or more slots in the time domain. A subframe may be a fixed time length (eg, 1 ms) independent of numerology.

Here, a numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration , a particular filtering process performed by the transceiver in the frequency domain, a particular windowing process performed by the transceiver in the time domain, and/or the like.

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

A slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in time units larger than a minislot may be referred to as PDSCH (PUSCH) Mapping Type A. PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (PUSCH) mapping type B.

Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be read interchangeably.

For example, one subframe may be called a TTI, a plurality of consecutive subframes may be called a TTI, and one slot or one minislot may be called a TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms may be Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.

Here, TTI refers to, for example, the minimum scheduling time unit in wireless communication. For example, in the LTE system, a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis. Note that the definition of TTI is not limited to this.

A TTI may be a transmission time unit such as a channel-encoded data packet (transport block), code block, or codeword, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.

When one slot or one minislot is called a TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum scheduling time unit. Also, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like. A TTI that is shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.

Note that the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms, and the short TTI (e.g., shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms A TTI having the above TTI length may be read instead.

A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in the RB may be the same regardless of the neumerology, eg twelve. The number of subcarriers included in an RB may be determined based on neumerology.

Also, an RB may contain one or more symbols in the time domain and may be 1 slot, 1 minislot, 1 subframe or 1 TTI long. One TTI, one subframe, etc. may each be configured with one or more resource blocks.

One or more RBs are Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB Also called a pair.

Also, a resource block may be composed of one or more resource elements (Resource Element (RE)). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

A Bandwidth Part (BWP) (which may also be called a bandwidth part) represents a subset of contiguous common resource blocks (RBs) for a numerology on a carrier. good too. Here, the common RB may be identified by an RB index based on the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL). One or multiple BWPs may be configured for a UE within one carrier.

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

It should be noted that the structures of radio frames, subframes, slots, minislots, symbols, etc. described above are merely examples. For example, the number of subframes contained in a radio frame, the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, the number of Configurations such as the number of subcarriers and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc. can be varied.

In addition, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information. may be represented. For example, radio resources may be indicated by a predetermined index.

The names used for parameters and the like in this disclosure are not restrictive names in any respect. Further, the formulas and the like using these parameters may differ from those expressly disclosed in this disclosure. Since the various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, the various names assigned to these various channels and information elements are not limiting names in any way. .

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

Also, information, signals, etc. can be output from a higher layer to a lower layer and/or from a lower layer to a higher layer. Information, signals, etc. may be input and output through multiple network nodes.

Input/output information, signals, etc. may be stored in a specific location (for example, memory), or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated or appended. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to other devices.

Notification of information is not limited to the aspects/embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure includes 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 combinations thereof may be performed by

The physical layer signaling may also be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), and the like. RRC signaling may also be called an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like. Also, MAC signaling may be notified using, for example, a MAC Control Element (CE).

In addition, notification of predetermined information (for example, notification of “being X”) is not limited to explicit notification, but implicit notification (for example, by not notifying the predetermined information or by providing another information by notice of

The determination may be made by a value (0 or 1) represented by 1 bit, or by a boolean value represented by true or false. , may be performed by numerical comparison (eg, comparison with a predetermined value).

Software, whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.

In addition, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, the software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) , a server, or other remote source, these wired and/or wireless technologies are included within the definition of transmission media.

The terms "system" and "network" used in this disclosure may be used interchangeably. A “network” may refer to devices (eg, base stations) included in a network.

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

In the present disclosure, "base station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission/Reception Point (TRP)", "Panel" , “cell,” “sector,” “cell group,” “carrier,” “component carrier,” etc. may be used interchangeably. A base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.

A base station can accommodate one or more (eg, three) cells. When a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area is assigned to a base station subsystem (e.g., a small indoor base station (Remote Radio)). Head (RRH))) may also provide communication services. The terms "cell" or "sector" refer to part or all of the coverage area of at least one of the base stations and base station subsystems that serve communication within such coverage.

In this disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", and "terminal" are used interchangeably. can be

Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , a handset, a user agent, a mobile client, a client, or some other suitable term.

At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like. The mobile object may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile object (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ). Note that at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations. For example, at least one of the base station and mobile station may be an Internet of Things (IoT) device such as a sensor.

Also, the base station in the present disclosure may be read as a user terminal. For example, communication between a base station and a user terminal is replaced with communication between multiple user terminals (for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.) Regarding the configuration, each aspect/embodiment of the present disclosure may be applied. In this case, the user terminal 20 may have the functions of the base station 10 described above. Also, words such as "up" and "down" may be replaced with words corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may be read as side channels.

Similarly, user terminals in the present disclosure may be read as base stations. In this case, the base station 10 may have the functions of the user terminal 20 described above.

In the present disclosure, operations that are assumed to be performed by the base station may be performed by its upper node in some cases. In a network that includes one or more network nodes with a base station, various operations performed for communication with a terminal may involve the base station, one or more network nodes other than the base station (e.g., Clearly, this can be done by a Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. (but not limited to these) or a combination thereof.

Each aspect/embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching along with execution. Also, the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in the present disclosure may be rearranged as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps using a sample order, and are not limited to the specific order presented.

Each aspect/embodiment described in this disclosure includes Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system ( 4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal number)), Future Radio Access (FRA), New - Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB) , IEEE 802.11 (Wi-Fi®), IEEE 802.16 (WiMAX®), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth®, or other suitable wireless It may be applied to systems using communication methods, next-generation systems extended based on these, and the like. Also, multiple systems may be applied in combination (for example, a combination of LTE or LTE-A and 5G).

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

Any reference to elements using the "first," "second," etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient 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 precede the second element in any way.

The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determination" includes judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry ( For example, looking up in a table, database, or another data structure), ascertaining, etc. may be considered to be "determining."

Also, "determining (deciding)" includes receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access ( accessing (e.g., accessing data in memory), etc.

Also, "determining" is considered to be "determining" resolving, selecting, choosing, establishing, comparing, etc. good too. That is, "determining (determining)" may be regarded as "determining (determining)" some action.

Also, "judgment (decision)" may be read as "assuming", "expecting", or "considering".

"Maximum transmit power" described in this disclosure may mean the maximum value of transmit power, may mean the nominal maximum transmit power (the nominal UE maximum transmit power), or may mean the rated maximum transmit power (the rated UE maximum transmit power).

The terms “connected”, “coupled”, or any variation thereof, as used in this disclosure, refer to any connection or coupling, direct or indirect, between two or more elements. and can include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. Couplings or connections between elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access".

In this disclosure, when two elements are connected, using one or more wires, cables, printed electrical connections, etc., and as some non-limiting and non-exhaustive examples, radio frequency domain, microwave They can be considered to be “connected” or “coupled” together using the domain, electromagnetic energy having wavelengths in the optical (both visible and invisible) domain, and the like.

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

Where "include," "including," and variations thereof are used in this disclosure, these terms are inclusive, as is the term "comprising." is intended. Furthermore, the term "or" as used in this disclosure is not intended to be an exclusive OR.

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

Although the invention according to the present disclosure has been described in detail above, it is obvious 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 changes without departing from the spirit and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for illustrative purposes and does not impose any limitation on the invention according to the present disclosure.

Claims

a receiving unit for receiving a Medium Access Control Control Element (MAC Control Element (CE)) containing a field indicating time to activation of a spatial relationship relative to a timing;
a controller that controls the activation of the spatial relationship based on the MAC CE.
When the MAC CE includes the field indicating the first time and the field indicating the second time, the control unit establishes the first spatial relationship after the first time based on the certain timing. 2. The terminal according to claim 1, which activates and activates a second spatial relationship after the second time elapses with respect to the certain timing.
When the MAC CE includes the field indicating the first time and the field indicating the second time, the control unit establishes the first spatial relationship after the first time based on the certain timing. 2. The terminal according to claim 1, which activates and activates a second spatial relationship after the sum of said first time and said second time relative to said certain timing.
Any one of claims 1 to 3, wherein the certain timing is timing for transmitting an uplink control channel having a Hybrid Automatic Repeat ReQuest ACKnowledgement (HARQ-ACK) corresponding to the downlink shared channel that transmits the MAC CE. terminal described in .
receiving a Medium Access Control Control Element (MAC Control Element (CE)) containing a field indicating the time to activation of the spatial relationship relative to some timing;
and C. controlling activation of said spatial relationship based on said MAC CE.
A transmitting unit that transmits to a terminal a Medium Access Control control element (MAC Control Element (CE)) that includes a field indicating the time to activation of a spatial relationship relative to a certain timing;
a controller that assumes that the terminal controls the activation of the spatial relationship based on the MAC CE.