Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure includes: a reception unit that receives a signal for determining a plurality of terminals sharing uplink data; and a control unit that, on the basis of the signal, controls either reception of the uplink data from another terminal among the plurality of terminals, or the transmits of the uplink data to the other terminal. This embodiment of the present disclosure can improve coverage.

Description

[Technical field]

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

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of achieving higher data rates and lower latency (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of achieving higher capacity and greater sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later, etc.) are also being considered.

[0004] In existing LTE systems (e.g., 3GPP Rel. 8-14), a user equipment (User Equipment (UE)) transmits uplink control information (Uplink Control Information (UCI)) using at least one of an UL data channel (e.g., a Physical Uplink Shared Channel (PUSCH)) and an UL control channel (e.g., a Physical Uplink Control Channel (PUCCH)). [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention [Problem to be solved by the invention]

[0006] In future wireless communication systems (e.g., NR), improvements in performance such as coverage and number of multiplexed users are being considered.

[0007] However, it is not clear how to increase transmission resources to improve coverage. If the method for increasing transmission resources is not clear, it may hinder the improvement of coverage.

[0008] Therefore, an object of the present disclosure is to provide a terminal, a wireless communication method, and a base station that improve coverage. [Means for solving the problem]

[0009] A terminal according to one aspect of the present disclosure includes a receiving unit that receives a signal for determining a plurality of terminals that share uplink data, and a control unit that controls, based on the signal, either reception of the uplink data from another terminal among the plurality of terminals or transmission of the uplink data to the other terminal. The receiver receives downlink control information for scheduling reception of one repetition of the multiple repetitions of the uplink data and transmission of the received repetition, the receiver receives one repetition of the multiple repetitions of the uplink data based on the downlink control information, and the controller controls transmission of the received repetition based on the downlink control information. do. Effect of the Invention

[0010] According to one aspect of the present disclosure, coverage can be improved. [Brief description of the drawings]

[0011] [Figure 1] 1A and 1B are diagrams illustrating an example of data sharing among multiple UEs. [Diagram 2] 2A and 2B are diagrams showing an example of grouping according to aspect 1-1-1. [Diagram 3] 3A and 3B are diagrams showing an example of grouping according to aspect 1-1-2. [Figure 4] 4A and 4B are diagrams showing an example of grouping according to aspect 1-1-3. [Diagram 5] 5A and 5B are diagrams showing an example of grouping according to aspect 1-1-3. [Figure 6] 6A and 6B are diagrams illustrating an example of a transmission resource allocation method according to aspect 1-2-1. [Figure 7] FIG. 7 is a diagram illustrating an example of a transmission resource allocation method according to aspect 1-2-2. [Figure 8] FIG. 8 is a diagram showing an example of a data sharing and resource allocation method according to aspect 2-1. [Figure 9] FIG. 9 is a diagram illustrating an example of MU-MIMO. [Figure 10] FIG. 10 is a diagram illustrating an example of a combination of multiple UEs for MU-MIMO. [Figure 11] FIG. 11 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 12] FIG. 12 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 13] FIG. 13 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 14] FIG. 14 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] (traffic type / service) In future wireless communication systems (e.g., NR), traffic types (also referred to as services, service types, communication types, use cases, etc.) such as further advances in mobile broadband (e.g., enhanced Mobile Broadband (eMBB)), machine type communications that realize multiple simultaneous connections (e.g., massive Machine Type Communications (mMTC), Internet of Things (IoT)), and highly reliable and low latency communications (e.g., Ultra-Reliable and Low-Latency Communications (URLLC)) are expected. For example, URLLC requires smaller latency and higher reliability than eMBB.

[0013] Traffic types may be identified at the physical layer based on at least one of the following: ·Priority · Logical channels with different priorities Modulation and Coding Scheme (MCS) table (MCS index table) ·Channel Quality Indication (CQI) table DCI format Used to scramble (mask) the Cyclic Redundancy Check (CRC) bits included (added) in the DCI (DCI format) (Radio Network Temporary Identifier (RNTI: System Information-Radio Network Temporary Identifier)) RRC (Radio Resource Control) parameters A specific RNTI (e.g., RNTI for URLLC, MCS-C-RNTI, etc.) Search Space Fields in the DCI (e.g., newly added fields or reuse of existing fields, priority fields)

[0014] Specifically, the traffic type of the HARQ-ACK for the PDSCH may be determined based on at least one of the following: The MCS index table used to determine at least one of the modulation order, target code rate, and transport block size (TBS) of the PDSCH (e.g., whether to use MCS index table 3) The RNTI used for CRC scrambling of the DCI used for scheduling the PDSCH (e.g., whether CRC scrambling is performed using C-RNTI or MCS-C-RNTI)

[0015] The traffic type of the SR may also be determined based on a higher layer parameter used as an SR identifier (SR-ID), which may indicate whether the traffic type of the SR is eMBB or URLLC.

[0016] Furthermore, the traffic type of the CSI may be determined based on configuration information (CSIreportSetting) related to CSI reporting, a DCI type or a DCI transmission parameter used for a trigger, etc. The configuration information, DCI type, etc. may indicate whether the traffic type of the CSI is eMBB or URLLC. The configuration information may be an upper layer parameter.

[0017] In addition, the traffic type of the PUSCH may be determined based on at least one of the following: The MCS index table used to determine at least one of the modulation order, target coding rate, and TBS of the PUSCH (e.g., whether to use MCS index table 3) The RNTI used for CRC scrambling of the DCI used for scheduling the PUSCH (e.g., whether CRC scrambling is performed using C-RNTI or MCS-C-RNTI)

[0018] The traffic type may be associated with communication requirements (requirements such as delay, error rate, etc.), data type (voice, data, etc.), and the like.

[0019] The difference between the requirements of URLLC and eMBB may be that the latency of URLLC is smaller than that of eMBB, or that the requirements of URLLC include a reliability requirement.

[0020] For example, the eMBB user (U) plane delay requirement may include a downlink U-plane delay of 4 ms and an uplink U-plane delay of 4 ms. Meanwhile, the URLLC U-plane delay requirement may include a downlink U-plane delay of 0.5 ms and an uplink U-plane delay of 0.5 ms. Furthermore, the URLLC reliability requirement may include a 32-byte error rate of 10-5 at a U-plane delay of 1 ms.

[0021] In addition, enhanced Ultra Reliable and Low Latency Communications (eURLLC) is being studied to improve the reliability of traffic, mainly for unicast data. In the following, when there is no need to distinguish between URLLC and eURLLC, they will simply be referred to as URLLC.

[0022] In NR Rel.16 and later, it is being considered to set multiple levels (e.g., two levels) of priority for a specific signal or channel. For example, it is expected that different priorities will be set for signals or channels corresponding to different traffic types (also called services, service types, communication types, use cases, etc.) to control communications (e.g., transmission control in the event of a collision). This makes it possible to control communications by setting different priorities for the same signal or channel depending on the service type, etc.

[0023] The priority of URLLC may be higher than the priority of eMBB. The priority may be set to "high" (high priority, 1) for URLLC and "low" (low priority, 0) for eMBB.

[0024] (Improved coverage) In future wireless communication systems (e.g., Rel. 17 NR), PUSCH is considered to be one of the coverage bottleneck channels. To extend coverage and improve PUSCH performance, an extension mechanism for PUSCH repetition type A, support for TB processing over multi-slot PUSCH, and joint channel estimation are being considered.

[0025] Specifically, techniques are being considered for improving characteristics by increasing the time resources for transmitting data.

[0026] Due to the fact that the total transmission power (maximum transmission power) of the UE is fixed, there has been insufficient consideration of improving characteristics in the frequency direction. For example, when frequency resources are increased, the power density per unit frequency is reduced, making it difficult to significantly improve transmission characteristics. If data transmission resources cannot be increased, there is a risk that it will hinder improvements in coverage.

[0027] Therefore, the present inventors have come up with a method of transmitting UL data by using other UEs when a UE transmits the data.

[0028] (User multiplexing) Assuming that many terminals, such as IoT devices, will be connected to the network, there is a risk that restrictions will be imposed on the number of users that can be multiplexed in the time direction.

[0029] When multi-user (MU)-multi-input multi-output (MIMO) is used, the base station reduces spatial correlation between signals to multiple UEs by transmitting different transmit beams (base station antenna beams) to different UEs.

[0030] When multiple UEs are located within a small area and a base station uses the same base station antenna beam for multiple UEs, communication quality / coverage may be degraded.

[0031] Therefore, the present inventors have conceived of a method of performing user multiplexing in the spatial direction for improving coverage characteristics / connecting multiple terminals.

[0032] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0033] In the present disclosure, "A / B / C" and "at least one of A, B, and C" may be read as interchangeable. In the present disclosure, cell, serving cell, CC, carrier, frequency carrier, BWP, DL BWP, UL BWP, active DL BWP, active UL BWP, band may be read as interchangeable. In the present disclosure, index, ID, indicator, resource ID may be read as interchangeable. In the present disclosure, support, control, can be controlled, operate, can operate may be read as interchangeable.

[0034] In the present disclosure, the terms configure, activate, update, indicate, enable, specify, and select may be read as interchangeable.

[0035] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof. In the present disclosure, RRC, RRC signaling, RRC parameters, higher layer, higher layer parameters, RRC information elements (IEs), and RRC messages may be read as interchangeable.

[0036] The MAC signaling may be, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0037] In the present disclosure, DMRS, DMRS port, and antenna port may be interpreted as interchangeable.

[0038] In the present disclosure, beam, spatial domain filter, spatial setting, TCI state, UL TCI state, unified TCI state, unified beam, common TCI state, common beam, TCI assumption, QCL assumption, QCL parameter, spatial domain receive filter, UE spatial domain receive filter, UE receive beam, DL beam, DL receive beam, DL precoding, DL precoder, DL-RS, RS of QCL type D in TCI state / QCL assumption, RS of QCL type A in TCI state / QCL assumption, spatial relationship, spatial domain transmit filter, UE spatial domain transmit filter, UE transmit beam, UL beam, UL transmit beam, UL precoding, UL precoder, PL-RS, may be read as interchangeable. In the present disclosure, QCL type X-RS, DL-RS associated with QCL type X, DL-RS with QCL type X, source of DL-RS, SSB, CSI-RS, SRS, may be read as interchangeable.

[0039] In the present disclosure, panel, Uplink (UL) transmitting entity, TRP, spatial relationship, control resource set (CORESET), PDSCH, codeword, base station, antenna port of a certain signal (e.g., DeModulation Reference Signal (DMRS) port), antenna port group of a certain signal (e.g., DMRS port group), group for multiplexing (e.g., Code Division Multiplexing (CDM) group, reference signal group, CORESET group), CORESET pool, CORESET subset, CW, redundancy version (RV), layer (MIMO layer, transmission layer, spatial layer), may be interpreted as interchangeable.

[0040] (Wireless communication method) In transmitting data (transport block (TB), traffic, UL data, PUSCH) from one UE (terminal) to a NW (network, e.g., base station, gNB), multiple UEs may share the data and transmit the data to the NW using multiple frequencies. Multiple UEs in a UE group may transmit the shared data.

[0041] In the example of FIG. 1A, when UE#1 transmits data to a gNB, the data may be shared with UE#2 / UE#3, and UE#1 / UE#2 / UE#3 may transmit the data. In this case, as in the example of FIG. 1B, at least two of UE#1, UE#2, and UE#3 may transmit the data at the same time using multiple frequencies different from each other. This allows the overall transmission power to be increased without increasing the transmission power per UE, and improves the characteristics of UL data transmission. Each UE may transmit data repetition.

[0042] A method for sharing data among multiple UEs and a mechanism for cooperative transmission by multiple UEs (a method for allocating resources and a method for requesting cooperative transmission) will be described below.

[0043] In the present disclosure, a UE attempting to transmit target data to a base station, a transmitting UE, a transmitting terminal, and a UE where traffic has occurred may be interpreted as being interchangeable.

[0044] In the present disclosure, a UE that transmits data from a transmitting UE to a base station, a transmitting UE, a cooperative terminal, and a relay UE may be interpreted as interchangeable.

[0045] In the present disclosure, a UE group, a terminal group, a transmitting UE and a cooperating UE, a plurality of UEs sharing data, a plurality of UEs transmitting the same data, a group, a sharing group, and a zone may be interpreted as being interchangeable.

[0046] In the present disclosure, the UEs within a UE group, the terminals within a terminal group, each of the multiple UEs sharing data, each of the multiple UEs transmitting the same data, and the sharing UE may be read as each other interchangeably.

[0047] In the present disclosure, radio quality, the quality of a specific channel / RS, radio link quality, and the range of received power may be read as each other interchangeably.

[0048] In the present disclosure, the network (NW), the base station, and the IAB node may be read as each other interchangeably.

[0049] In the present disclosure, the UE, the terminal, the IAB node, the mobile station, the mobile body, and the vehicle may be read as each other interchangeably.

[0050] In the present disclosure, transmitting a channel / signal to multiple UEs, broadcasting, multicasting, and groupcasting may be read as each other interchangeably.

[0051] In the present disclosure, the data that the transmitting UE intends to transmit, the target data, a part or all of the target data, UL data, the transport block, and the traffic may be read as each other interchangeably.

[0052] When the terminal UE and the cooperative UE transmit the target data to the base station, each of the terminal UE and the cooperative UE may transmit a part or all of the target data, and the whole of the terminal UE and the cooperative UE may transmit the whole of the target data. The base station / transmitting UE may schedule the transmission / reception of a part or all of the target data for the cooperative UE. Multiple UEs within a UE group may each transmit different multiple parts within the target data. Multiple UEs within a UE group may each transmit multiple redundancy versions (RVs) based on the target data.

[0053] The base station / transmitting UE may allocate resources for data transmission / reception to the transmitting UE and cooperating UEs (schedule data transmission / reception) based on information identifying the UEs in the UE group (e.g., destination ID / source ID).

[0054] The base station / transmitting UE may schedule data transmission / reception for some UEs in the UE group, which may be UEs corresponding to a quality (measurement result / error rate) above a threshold.

[0055] In this disclosure, beam, spatial domain filter, antenna beam, base station transmit beam, UE receive beam, spatial domain receive filter, and spatial domain transmit filter may be interpreted as interchangeable.

[0056] In the present disclosure, adjacent beams of a particular beam, neighboring beams of a particular beam, peripheral beams of a particular beam, other beams of a particular beam, and beams associated with a particular beam may be interpreted as interchangeable.

[0057] The association of one or more adjacent beams for each base station antenna beam may be established by higher layer signaling or may be specified in a specification.

[0058] The base station may receive measurement results of the multiple beams from each of the multiple UEs. Based on the measurement results, the base station may determine a combination of the multiple UEs to which MU-MIMO is applied to one base station transmission beam, and the channels (DL channels / UL channels) for the multiple UEs may be transmitted in the same time resource and the same frequency resource and multiplexed in the spatial direction (spatial domain).

[0059] For the UEs associated with the same base station transmit beam, the base station may determine a subset of the UEs, and may assign the same time and frequency resources to channels for the UEs in the subset and assign different time and frequency resources to channels for the UEs outside the subset.

[0060] By using spatial multiplexing (MU-MIMO) for a combination of multiple UEs that are far apart from each other, it is possible to reduce the spatial correlation of signals from multiple UEs and improve signal separation performance, thereby allowing the number of users to be multiplexed to be increased.

[0061] A plurality of UEs in the combination may be assigned a plurality of mutually orthogonal DMRSs, which may be different sequences in the same CDM group or may have different orthogonal cover codes (OCCs) applied thereto.

[0062] The base station may use the best beam reported by the UE (the beam corresponding to the best measurement result among multiple measured beams) for MU-MIMO (transmission of DL channel) for the UE. The UE may receive the DL channel using the reported best beam.

[0063] The base station may change the base station transmission beam for the UE in the combination (may use a beam different from the best beam). The UE may receive a DL channel using a beam other than the best beam among the multiple beams reported. For a first UE and a second UE that report the same best beam, if the measurement result of the first beam different from the best beam in the first UE is higher than a threshold and the measurement result of the second beam different from the best beam is lower than a threshold, and if the measurement result of the second beam different from the best beam in the second UE is higher than a threshold and the measurement result of the first beam different from the best beam is lower than a threshold, the base station may use the first beam for the first UE and the second beam for the second UE.

[0064] The MU-MIMO in the present disclosure may be applied to either the DL channel or the UL channel.

[0065] Each embodiment may be applied to IoT devices or other services / traffic types.

[0066] <First embodiment> Data sharing method 1 between multiple UEs

[0067] The UE uses a path (air interface, access channel, channel, link) that does not use the NR Uu for data sharing. The path that does not use the NR Uu may be a sidelink. The NR Uu may be a radio interface (access channel) between the UE and the gNB.

[0068] <<Aspect 1-1>> How to configure (group) cooperative UEs

[0069] [Aspect 1-1-1] The base station may group multiple UEs (may set / indicate destination / UE group).

[0070] The base station sets / instructs the UE of an ID corresponding to the cell / TRP / beam. The ID may be a common value for multiple UEs, or may be a unique (individual) value for each UE. For example, the ID may be an ID of a UE group, or an ID of a specific UE. The ID may be set / instructed in response to a specific trigger, or may be set / instructed periodically by configuration information (system information). The specific trigger may be a scheduling request (SR) from the transmitting UE.

[0071] If the sidelink is used for data sharing, the transmitting UE may use the configured ID as a destination to indicate the cooperating UE. The destination may be an L2 destination.

[0072] If sidelink is used for data sharing, the transmitting UE may use the ID as a destination (L2 destination) to indicate the cooperating UE. If the ID is common to multiple UEs, the transmitting UE may send the target data to one or more cooperating UEs by broadcast (multicast). If the ID is specific to the UE, the transmitting UE may send the target data to one cooperating UE by unicast.

[0073] When the transmitting UE transmits target data to the cooperative UE, sidelink mode 1 / 2 may be used. In sidelink mode 1, the transmission resource of the target data may be set / instructed by the gNB using the SL-RNTI. In sidelink mode 2, the transmission resource of the target data may be searched / determined by the transmitting UE. When sidelink mode 1 is used, the transmitting UE may request a resource allocation for grouping from the base station (may transmit an SR). The base station may notify / instruct the resource allocation for grouping to the transmitting UE and a UE that may be a cooperative UE. The UE that may be a cooperative UE may be a UE that corresponds to the same value of the cell / TRP / beam / received power value (range) corresponding to the transmitting UE. The base station may notify / instruct the resource allocation using the SL-RNTI and notify information for grouping using the allocated resource. The information for grouping may include an ID / destination. The base station may notify / instruct the resource allocation in response to the SR from the UE.

[0074] The transmitting UE may receive at least one of information indicating whether the cooperative UE has successfully received the target data in response to transmission of the target data to the cooperative UE (HARQ-ACK information) and the ID of the cooperative UE (e.g., L2 source ID).

[0075] The transmitting UE may report to the base station the IDs of the cooperative UEs that have successfully received the target data.

[0076] The ID may be associated with an identifier (e.g., C-RNTI) set from the NW.

[0077] In the example of FIG. 2A, UE#0 is a transmitting UE, and UE#1 and #2 are cooperative UEs. Source IDs=00, 01, and 10 are set / instructed for UE#0, #1, and #2, respectively. A common destination ID=11 is set / instructed for UE#0, #1, and #2. Then, as shown in the example of FIG. 2B, UE#0 transmits target data to UE#1 and #2 using the destination ID. In response to receiving the target data, each of UE#1 and #2 may transmit HARQ-ACK information together with its own source ID to UE#0. When UE#0 receives ACK from each of UE#1 and #2, UE#0 may recognize that UE#1 and #2 share the target data. UE#0 may report information indicating UE#1 and #2 that share the target data to the base station.

[0078] [Aspect 1-1-2] The transmitting UE may perform the grouping (may probe / determine the destination).

[0079] The transmitting UE may transmit target data or a specific signal / channel for the purpose of probing for cooperating UEs. For example, the transmitting UE may transmit the target data using a sidelink. The destination ID may be a value not associated with a specific UE (a specific value, a value indicating an unspecified UE), a value outside the range applicable to the UE, or a pre-configured / defined value. Multiple or all UEs may be capable of receiving the target data addressed to this destination ID and may attempt to receive the target data.

[0080] The transmitting UE may receive at least one of information (HARQ-ACK information) indicating whether the cooperative UE has successfully received the target data in response to transmission of the target data to the cooperative UE, and the ID of the cooperative UE (e.g., L2 source ID).

[0081] The transmitting UE may report to the base station the IDs of the cooperative UEs that have successfully received the target data.

[0082] In the example of FIG. 3A, UE#0 is a transmitting UE, and UE#1 and #2 are cooperative UEs. Source IDs=00, 01, and 10 are set / instructed for UE#0, #1, and #2, respectively. Then, as shown in the example of FIG. 3B, UE#0 transmits target data to UE#1 and #2 using destination ID=99. All UEs attempt to receive the target data addressed to destination ID=99. In response to receiving the target data, each of UE#1 and #2 transmits HARQ-ACK information together with its own source ID to UE#0. When UE#0 receives ACK from each of UE#1 and #2, UE#0 recognizes that UE#1 and #2 share the target data. UE#0 may report information indicating UE#1 and #2 that share the target data to the base station.

[0083] [Aspect 1-1-3] A UE other than the transmitting UE may perform grouping (may probe / determine destination).

[0084] The cooperative UE may transmit a specific signal for the purpose of searching / grouping the UE. A sidelink may be used to transmit the specific signal. A destination ID used in the specific signal may be a value set / instructed by the base station as in example 1-1-1, or may be a specific value as in example 1-1-2.

[0085] In response to receiving the specific signal, the transmitting UE may receive at least one of information indicating whether the reception was successful (HARQ-ACK information) and the ID of the transmitting UE (e.g., L2 source ID).

[0086] If the transmitting UE successfully receives a specific signal from a cooperative UE, the transmitting UE may report the ID of the cooperative UE to the base station.

[0087] In the example of FIG. 4A, UE#0 is a transmitting UE, and UE#1 and #2 are cooperative UEs. Source IDs=00, 01, and 10 are set / instructed for UE#0, #1, and #2, respectively. A common destination ID=11 is set for UE#0, #1, and #2. Then, in the example of FIG. 4B, when UE#0 and #1 are already in a UE group, UE#2 transmits a specific signal to UE#0 and #1 using the destination ID. In response to receiving the specific signal, UE#0 transmits HARQ-ACK information to UE#2 together with its own source ID, and adds UE#2 to the UE group. UE#0 may transmit target data to UE#1 and #2 in the UE group using the destination ID. In response to receiving the target data, each of UE#1 and #2 transmits HARQ-ACK information to UE#0 together with its own source ID. When UE#0 receives ACK from each of UE#1 and #2, UE#0 recognizes that UE#1 and #2 share the target data. UE#0 may report information indicating UE#1 and #2 that share the target data to the base station, or may report information indicating UE#2 (source ID=10) that has been added to the UE group to the base station.

[0088] [Aspect 1-1-4] The groupings may be pre-set or may be dictated by a specification.

[0089] For each UE, a destination ID (for broadcast / unicast) may be preset or may be specified in the specifications.

[0090] Each UE may be configured with its own destination ID and destination IDs of other UEs.

[0091] The transmitting UE may use the destination ID to transmit the target data to the cooperating UE.

[0092] The transmitting UE may receive at least one of information indicating whether the cooperative UE has successfully received the target data in response to transmission of the target data to the cooperative UE (HARQ-ACK information) and the ID of the cooperative UE (e.g., L2 source ID).

[0093] The transmitting UE may report to the base station the IDs of the cooperative UEs that have successfully received the target data.

[0094] In the example of FIG. 5A, UE#0 is a transmitting UE, and UE#1 and #2 are cooperative UEs. Source IDs=00, 01, 10 are set for UE#0, #1, #2, respectively. Destination IDs=20, 21, 22 are set for UE#0, #1, #2, respectively. In addition to its own destination ID=20, UE#0 is also set with destination IDs=21, 22 of other UEs (cooperative UEs) in the UE group. Then, as shown in the example of FIG. 5B, UE#0 transmits target data to UE#1 and #2 using the destination IDs of the cooperative UEs. In response to receiving the target data, each of UE#1 and #2 may transmit HARQ-ACK information together with its own source ID to UE#0. When UE#0 receives ACK from each of UE#1 and #2, UE#0 may recognize that UE#1 and #2 share the target data. UE#0 may report information indicating UE#1 and #2 that share the target data to the base station.

[0095] <<Aspect 1-2>> Method for allocating transmission resources to cooperative UEs

[0096] [Aspect 1-2-1] The base station may directly configure / instruct all UEs (transmitting UEs and cooperative UEs) on transmission resources (UL transmission resources) for transmitting target data from the UE to the base station. The base station may allocate each transmission resource to the transmitting UE and the cooperative UE. If the base station knows the existence / ID of the cooperative UE (e.g., by aspect 1-1), the base station may allocate each transmission resource to the transmitting UE and the cooperative UE.

[0097] The base station may schedule the same time resource and different or the same frequency resource for each of multiple UEs using control information (e.g., DCI). In the example of FIG. 6A, the UE group includes a transmitting UE #1 and cooperative UEs #2 and #3. UEs #1, #2, and #3 receive DCIs #1, #2, and #3, respectively. DCIs #1, #2, and #3 schedule PUSCHs #1, #2, and #3, respectively. UEs #1, #2, and #3 receive PUSCHs #1, #2, and #3, respectively.

[0098] A base station may schedule transmission resources for multiple UEs using one control information (e.g., DCI). In the example of FIG. 6B, a UE group includes a transmitting UE #1 and cooperative UEs #2 and #3. Each of UEs #1, #2, and #3 receives DCI #0. DCI #0 schedules PUSCHs #1, #2, and #3. UEs #1, #2, and #3 receive PUSCHs #1, #2, and #3, respectively.

[0099] The base station may schedule some of the UEs in the group based on the radio quality corresponding to each UE, for example, the base station may not schedule the transmitting UEs but may schedule the cooperative UEs.

[0100] [Aspect 1-2-2] The base station may set / instruct transmission resources (UL transmission resources) (allocation) of target data from the UE to the base station only for the transmitting UE of the UE group. The transmitting UE may set / instruct the cooperative UEs to set / instruct the transmission resources (allocation) of the target data. The base station may set / instruct information regarding the transmission resources of the transmitting UE and information regarding the transmission resources of the cooperative UEs to the transmitting UE. The transmitting UE may set / instruct information regarding the transmission resources of the cooperative UEs to the cooperative UEs. The information regarding the transmission resources (allocation) may include at least one of a frequency domain resource allocation and a time domain resource allocation. The transmitting UE may set / instruct / send / notify information regarding the transmission resources of the cooperative UEs directly to the cooperative UEs (e.g., using a sidelink).

[0101] A base station may schedule transmission resources for multiple UEs using one control information (e.g., DCI). In the example of FIG. 7, a UE group includes a transmitting UE #1 and cooperative UEs #2 and #3. UE #1 receives DCI #0. DCI #0 includes resource allocation (schedule) information for PUSCH #1, #2, and #3. UE #1 transmits resource allocation information for PUSCH #2 to UE #2 using a side link. UE #1 transmits resource allocation information for PUSCH #3 to UE #3 using a side link. UE #1, #2, and #3 receive PUSCH #1, #2, and #3, respectively.

[0102] <<Aspect 1-3>> Request method for cooperative UE

[0103] The transmitting UE may transmit a channel / signal including an SR and a request for cooperative transmission to the base station. The base station may explicitly or implicitly determine whether to permit cooperative transmission based on the UE capability from the transmitting UE.

[0104] The transmitting UE may spontaneously share the target data with the cooperative UE (e.g., using sidelink mode 2) before transmitting the SR (or may spontaneously transmit the target data to the cooperative UE). The transmitting UE may share the target data with the cooperative UE after transmitting the SR. The transmitting UE may spontaneously share the target data with the cooperative UE (e.g., using sidelink mode 2) after transmitting the SR. The base station may trigger the transmitting UE / cooperative UE to share the target data (e.g., using sidelink mode 1) in response to receiving the SR.

[0105] The transmitting UE may transmit an SR, or the transmitting UE and the cooperative UE may each transmit an SR. The transmitting UE and the cooperative UE may each transmit an SR simultaneously. Of the UE group, a UE corresponding to a radio quality equal to or higher than a threshold may transmit an SR, or a UE corresponding to the highest (best) radio quality may transmit an SR.

[0106] According to this embodiment, the target data of the transmitting UE is shared with the cooperative UE without going through the base station, so that even when the wireless quality between the transmitting UE and the base station is low (the distance is long), the target data is more likely to be shared with the cooperative UE.

[0107] <Second embodiment> Data sharing method 2 between multiple UEs

[0108] The UE uses the NR Uu for data sharing. The path using the NR Uu may be an uplink and a downlink.

[0109] <<Aspect 2-1>> Method for sharing data and allocating resources among multiple UEs

[0110] The transmitting UE may transmit repetitions of the target data. In this case, the cooperative UE may monitor / receive the first repetition from the transmitting UE and transmit the second and subsequent repetitions. If the cooperative UE fails to receive the first repetition, it may monitor / receive the next repetition.

[0111] Control information (e.g., DCI) for each cooperative UE may schedule monitoring / transmission resources for the cooperative UE individually for each UE. One control information (e.g., DCI) may schedule monitoring / transmission resources for multiple UEs.

[0112] The base station may explicitly or implicitly inform the cooperative UE of the resources for monitoring / transmission. For example, the base station may inform the cooperative UE of two time resources, the first time resource is for monitoring and the second time resource is for transmission.

[0113] In the example of FIG. 8, the UE group includes a transmitting UE#1 and cooperative UE#2, #3. UE#1, #2, #3 receive DCI#1, #2, #3, respectively. DCI#1 schedules the repetition of PUSCH#1. DCI#2 schedules the monitoring / reception of the first repetition of PUSCH#1 and the transmission of PUSCH#2. DCI#3 schedules the monitoring / reception of the first repetition of PUSCH#1 and the transmission of PUSCH#3. UE#1 transmits target data using the repetition of PUSCH#1. UE#2 receives the target data in the first repetition of PUSCH#1 and transmits the target data in PUSCH#2. UE#3 receives the target data in the first repetition of PUSCH#1 and transmits the target data in PUSCH#3. Each of PUSCH #2 and #3 may be transmitted in the same time resource as the second and subsequent repetitions of PUSCH #1.

[0114] "Aspect 2-2" How to request coordinated transmission

[0115] The transmitting UE may transmit a channel / signal including an SR and a request for cooperative transmission to the base station. The base station may explicitly or implicitly determine whether to permit cooperative transmission based on the UE capability from the transmitting UE.

[0116] According to this embodiment, the base station schedules the transmission of the transmitting UE and the transmission and reception of the cooperative UE, so that the load of the transmitting UE can be reduced.

[0117] <Third embodiment> When the DL signal measurement is performed, the base station may explicitly configure / instruct the reporting of neighboring beams for a specific beam according to the information of the specific beam configured for the UE. The DL signal may be a DL reference signal, SSB / CSI-RS.

[0118] In the example of Fig. 9, the base station sets / instructs UE#1 to base station antenna beam#1 (TCI state corresponding to base station antenna beam#1). In this case, the base station may set / instruct UE1 to report the measurement results of adjacent beams (base station antenna beams#0, #2) of base station antenna beam#1. The adjacent beams may be notified using the TCI state (e.g., RRC IE TCI-State). The DL signal used for the measurement may be notified to the UE.

[0119] The base station may instruct one or more associated UEs to report neighboring beams. The associated UEs may be UEs that are configured / instructed to use a specific beam. In the example of FIG. 10, the associated UEs may be UEs #1 to #6 that use antenna beam #1.

[0120] The UE may include the measurement results of a specific beam / adjacent beam in the report according to the reporting configuration / instruction. Even if a threshold is configured by the measurement object information element (e.g., MeasObjectNR) and the reporting configuration information element (e.g., ReportConfigNR), the UE may report the measurement results of the specific beam / adjacent beam regardless of whether the measurement results of the specific beam / adjacent beam are equal to or greater than the threshold. The UE may report the measurement results of all beams configured for measurement.

[0121] The base station may determine a combination of UEs for MU-MIMO according to the content of the report. For example, the base station determines whether the distances between a plurality of UEs are far apart based on the report, and combines the plurality of UEs with far-apart distances. In the example of FIG. 10, in the report from UE#1, the received power of base station antenna beam #0 is higher than the threshold value, the received power of base station antenna beam #2 is lower than the threshold value (or the received power of base station antenna beam #0 is higher than the received power of base station antenna beam #2), and in the report from UE#4, the received power of base station antenna beam #2 is higher than the threshold value, the received power of base station antenna beam #0 is lower than the threshold value (or the received power of base station antenna beam #2 is higher than the received power of base station antenna beam #0), the base station determines the combination of UE#1 and #4.

[0122] Regardless of the measurement results of the UE, by reporting the measurement results, the base station can perform estimation of the positional relationship of the UE, determination of the combination for MU-MIMO, etc. from a plurality of measurement results.

[0123] According to this embodiment, the UE can measure a plurality (all) of beams by measuring the DL signal from the base station. The base station can appropriately determine the combination of UEs for spatial multiplexing (MU-MIMO) based on the measurement results.

[0124] <Fourth Embodiment> The UE may measure the UL signal from another UE and report the measurement result to the base station. The UL signal may be a UL reference signal, SRS.

[0125] <Aspect 4-1> The base station may set / indicate the resources of the UL signal from another UE to the UE.

[0126] The base station may set / indicate the measurement of the UL signal from another UE (measurement target UE, for example, UE#2) among a plurality of UEs that are candidates for the MU-MIMO combination to one UE (measurement UE, for example, UE#1) among the plurality of UEs.

[0127] The base station may transmit UE-specific configuration to the measuring UE (UE#1) to be transmitted to the measurement target UE (UE#2) for UL signal transmission.

[0128] The measuring UE may perform measurements in the configured UL signal resources and report the results to the base station. The report contents may be configured by a report configuration information element (e.g., ReportConfigNR). The report contents may be measurement results (e.g., received power) or may be a judgment result as to whether the measuring UE and the measurement target UE are suitable for MU-MIMO combination. If the measurement result is lower than a threshold, the measuring UE may judge that the measuring UE and the measurement target UE are suitable for MU-MIMO combination. Information on multiple measurement target UEs may be configured for the measuring UE. The measuring UE may measure UL signals from multiple UEs and report the measurement results / judgment results for the multiple UEs.

[0129] The base station may determine the combination of UEs for MU-MIMO depending on the contents of the report.

[0130] <<Aspect 4-2>> The base station does not need to configure / instruct the UE on resources for UL signals from other UEs.

[0131] When a UE is configured to transmit an UL signal, the UE may determine resources for UL signals from other UEs based on the configuration and perform measurements on the resources. For example, the UE may perform measurements (of UL signals from other UEs) at timings (periods and offsets) different from those configured for the transmission of UL signals. The UE may be triggered to start / stop measurements by the base station.

[0132] If the measurement result is equal to or greater than the threshold, the UE may report at least one of the resource corresponding to the measurement result and the number of channels corresponding to the measurement result. The resource may be a system frame number (SFN), a subframe number, or a slot number. The report content may be the measurement result (e.g., received power), or a determination result as to whether the measuring UE and the measurement target UE are suitable for a MU-MIMO combination.

[0133] The base station may determine the combination of UEs for MU-MIMO depending on the contents of the report.

[0134] According to this embodiment, the UE can measure signals from other UEs, and the base station can appropriately determine the combination of the UEs for spatial multiplexing (MU-MIMO) based on the measurement results.

[0135] <Fifth embodiment> A plurality of UEs may be grouped (may form a UE group). A UE may receive signals / channels / control information transmitted from other UEs and determine / identify UEs in the UE group based on the quality of the received signals / channels / control information. The signals / channels transmitted from other UEs may be at least one of a synchronization signal (e.g., sidelink (S)-SSB (S-SS / SPBCH block)), a control channel (e.g., physical sidelink control channel (PSCCH)), a reference signal (e.g., SRS), and HARQ-ACK information.

[0136] The measuring UE may estimate a separation distance between the measuring UE and the measurement target UE based on the signal from the measurement target UE. The measuring UE may report information about the separation distance to the base station according to at least one of the following reporting methods 1 to 4.

[0137] [Report method 1] When reporting grouping information to the base station, the UE reports information on the separation distance to the base station.

[0138] [Report method 2] When the UE receives a report request from the base station, the UE reports information regarding the separation distance to the base station.

[0139] [Report method 3] The UE reports information regarding the separation distance to the base station according to the method / period set / instructed by the base station.

[0140] [Report method 4] When a UE requests resources for PUSCH transmission (transmits an SR), the UE reports information about the separation distance to the base station.

[0141] The base station may determine the combination of UEs for MU-MIMO depending on the contents of the report.

[0142] According to this embodiment, the UE can measure signals from other UEs, and the base station can appropriately determine the combination of the UEs for spatial multiplexing (MU-MIMO) based on the measurement results.

[0143] Sixth embodiment A higher layer parameter (RRC IE) / UE capability corresponding to the function (feature) in each of the above embodiments may be defined. The UE capability may indicate that the function is supported.

[0144] A UE in which a higher layer parameter corresponding to the function (enabling the function) is configured may perform the function. It may be specified that "a UE in which a higher layer parameter corresponding to the function is not configured shall not perform the function (e.g., in accordance with Rel. 15 / 16)."

[0145] A UE that reports a UE capability indicating that it supports the function may perform the function. It may be specified that "a UE that does not report a UE capability indicating that it supports the function shall not perform the function (e.g., in accordance with Rel. 15 / 16)."

[0146] If the UE reports a UE capability indicating that the UE supports the function and a corresponding higher layer parameter is configured, the UE may perform the function. It may also be specified that "if the UE does not report a UE capability indicating that the UE supports the function or if a corresponding higher layer parameter is not configured, the UE shall not perform the function (e.g., in accordance with Rel.15 / 16)."

[0147] The UE capability may indicate whether the UE supports the feature.

[0148] The capability may be a capability related to coordinated transmission in data transmission. The UE capability may indicate whether or not the UE supports coordinated transmission in data transmission. The UE capability may indicate whether or not the UE supports grouping / destination setting by a base station. The UE capability may indicate whether or not the UE supports grouping / destination setting by a base station.

[0149] The capability may be measurement / reporting for determining a combination of multiple UEs in MU-MIMO. The UE capability may indicate whether or not the UE supports measurement / reporting using DL signals (e.g., SSB / CSI-RS) / UL signals (e.g., SRS) for determining a combination of multiple UEs in MU-MIMO. The UE capability may indicate whether or not the UE supports grouping of multiple UEs and whether or not the UE supports measurement / reporting for determining a combination of multiple UEs in MU-MIMO.

[0150] The UE may report UE capabilities for a feature for the frequencies it supports. The UE capabilities may indicate whether the UE supports the feature for all frequencies. The UE capabilities may indicate whether the UE supports the feature per frequency / band. The UE capabilities may indicate whether the UE supports the feature per frequency range (e.g., FR1 / FR2).

[0151] The UE may report UE capability regarding a function for a supported duplex mode. The UE capability may indicate whether the UE supports a function. The UE capability may indicate whether the UE supports a function for each duplex mode (TDD / FDD).

[0152] According to this embodiment, the UE can achieve the above functions while maintaining compatibility with existing specifications.

[0153] (Wireless communication systems) A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination of these methods.

[0154] 11 is a diagram showing an example of a schematic configuration of a wireless communication system according to an 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), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0155] Furthermore, the wireless communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0156] 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.

[0157] The wireless communication system 1 may support dual connectivity between multiple base stations in the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0158] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged in the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1. A user terminal 20 may be located in at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as a base station 10.

[0159] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0160] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (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 frequency band higher than FR2.

[0161] Furthermore, the user terminal 20 may perform communication in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0162] The multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., 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 may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0163] 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 at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0164] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0165] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.

[0166] The radio access scheme may be called a waveform. In the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0167] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as a downlink channel.

[0168] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0169] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0170] 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 of at least one of the PDSCH and the PUSCH.

[0171] In addition, DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and DCI for scheduling PUSCH may be called UL grant, UL DCI, etc. In addition, PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

[0172] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or multiple search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0173] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in the present disclosure may be read as interchangeable terms.

[0174] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and a scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0175] In the present disclosure, a downlink, an uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning of the channels.

[0176] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, 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), etc. may be transmitted.

[0177] 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 the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) may be called an SS / PBCH block, an SS Block (SSB), or the like. In addition, the SS, SSB, and the like may also be called a reference signal.

[0178] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may be called a user equipment specific reference signal (UE-specific reference signal).

[0179] (base station) 12 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 transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.

[0180] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the base station 10 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0181] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0182] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission and reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0183] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0184] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0185] The transmitting / receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0186] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0187] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0188] The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0189] The transceiver 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0190] The transceiver unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna .

[0191] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna .

[0192] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0193] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0194] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data) for the user terminal 20, control plane data, etc.

[0195] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0196] The transceiver 120 may receive signals (eg, measurement results, determination results, destination ID, source ID) for determining a plurality of terminals (eg, a UE group) that share uplink data.

[0197] Based on the signal, the control unit 110 may control (e.g., configure, instruct, schedule) a first terminal of the plurality of terminals to either receive the uplink data from a second terminal of the plurality of terminals or transmit the uplink data to the second terminal.

[0198] The transceiver 120 may receive measurement results of any one of a plurality of downlink signals, a first uplink signal from another terminal, and a sidelink signal from another terminal.

[0199] The control unit 110 may control the transmission of a downlink channel or the reception of an uplink channel (e.g., MU-MIMO) using a beam (e.g., base station transmitting beam / UE receiving beam / spatial domain receiving filter) and sequence (e.g., DMRS sequence) based on the report.

[0200] (User terminal) 13 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230.

[0201] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0202] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0203] The control unit 210 may control signal generation, mapping, etc. 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.

[0204] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on the common understanding in the technical field related to the present disclosure.

[0205] The transceiver unit 220 may be configured as an integrated transceiver unit, or may be composed of a transmitter unit and a receiver unit. The transmitter unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiver unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0206] The transceiver antenna 230 may be composed of an antenna described based on the common understanding in the technical field related to the present disclosure, such as an array antenna.

[0207] The transceiver unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0208] The transceiver unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.

[0209] The transceiver unit 220 (transmission processing unit 2211) may perform processing of the PDCP layer, processing of the RLC layer (e.g., RLC retransmission control), processing of the MAC layer (e.g., HARQ retransmission control), etc. on, for example, data and control information obtained from the control unit 210, and generate a bit sequence to be transmitted.

[0210] The transceiver 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit sequence to be transmitted, and output a baseband signal.

[0211] Whether or not to apply the DFT process may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver 220 (transmission processor 2211) may perform the DFT process as the transmission process to transmit the channel using a DFT-s-OFDM waveform, and may not perform the DFT process as the transmission process if transform precoding is enabled for the channel.

[0212] The transceiver unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna 230.

[0213] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna 230.

[0214] The transceiver 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0215] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0216] In addition, the transmitting section and the receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0217] The transceiver 220 may receive signals (eg, UL signals, sidelink signals, measurement results, determination results, destination IDs, source IDs) for determining multiple terminals that share uplink data (eg, transport blocks).

[0218] Based on the signal, the control unit 210 may control (e.g., setting, instructing, scheduling, data transmission, data reception, transmission / reception of a UL channel, transmission / reception of a sidelink channel) either the reception of the uplink data from another terminal among the plurality of terminals or the transmission of the uplink data to the other terminal.

[0219] The signal may include a measurement result by the other terminal. The control unit 210 may determine an identifier (for example, a destination ID, a source ID) corresponding to each of the multiple terminals based on the measurement result.

[0220] The control unit 210 may control the transmission of control information (for example, side link control information) that instructs the other terminals to receive the uplink data and transmit the uplink data.

[0221] The transceiver 220 may receive one of the multiple repetitions of the uplink data. The controller 210 may control transmission of the received repetition.

[0222] The transceiver 220 may receive any one of a plurality of downlink signals, a first uplink signal from another terminal, and a sidelink signal from another terminal.

[0223] The control unit 210 may report the measurement results of the signal and control the reception of a downlink channel or the transmission of an uplink channel (e.g., MU-MIMO) using a beam (e.g., base station transmitting beam / UE receiving beam / spatial domain receiving filter) and a sequence (e.g., DMRS sequence) based on the report.

[0224] The downlink signals may be associated with a plurality of beams, respectively. The transceiver unit 220 may receive a configuration related to measurements of the downlink signals, and may receive the downlink signals based on the configuration. The controller 210 may report a plurality of measurement results corresponding to the downlink signals, respectively.

[0225] The transceiver 220 may receive information about at least one resource of the first uplink signal and a second uplink signal transmitted from the terminal, and may receive the first uplink signal based on the information. The controller 210 may report a measurement result corresponding to the first uplink signal.

[0226] The transceiver unit 220 may receive the sidelink signal. The controller 210 may report a measurement result corresponding to the sidelink signal.

[0227] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically combined, or may be realized by using two or more devices that are physically or logically separated and directly or indirectly connected (for example, by wire, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

[0228] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission may be called a transmitting unit, a transmitter, and the like. In either case, as described above, the method of realization is not particularly limited.

[0229] 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 showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. The above-mentioned base station 10 and 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, etc.

[0230] In this disclosure, the terms "apparatus," "circuit," "device," "section," "unit," and the like can be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0231] For example, although only one processor 1001 is shown, there may be multiple processors. Also, the processes may be performed by one processor, or the processes may be performed by two or more processors simultaneously, sequentially, or in other manners. Also, the processor 1001 may be implemented by one or more chips.

[0232] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading a specific software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications via a communication device 1004, and controls at least one of reading and writing of data in the memory 1002 and the storage 1003.

[0233] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0234] Moreover, the processor 1001 reads out programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to the programs. As the programs, programs that cause a computer to execute at least a part of the operations described in the above-mentioned embodiments are 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 the other functional blocks may be realized in a similar manner.

[0235] The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be called a register, a cache, a main memory (primary storage device), and the like. The memory 1002 can store a program (program code), a software module, and the like that is executable to implement a wireless communication method according to an embodiment of the present disclosure.

[0236] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0237] 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 called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0238] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0239] In addition, 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 each device.

[0240] Furthermore, 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), etc., and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0241] (Modification) In addition, the terms explained in this disclosure and the terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be read as mutually interchangeable. A signal may also be a message. A reference signal may also be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applied standard. A component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, etc.

[0242] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0243] Here, the numerology may be a communication parameter applied to at least one of the transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0244] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may also be a time unit based on numerology.

[0245] A slot may include multiple minislots. Each minislot may be composed of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may be composed of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0246] A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. A different name may be used for the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be read as interchangeable with each other.

[0247] For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0248] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0249] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI.

[0250] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0251] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI 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, etc.

[0252] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0253] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0254] In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. Each of one TTI, one subframe, etc. may be composed of one or more resource blocks.

[0255] One or more RBs may also be referred to as a Physical Resource Block (PRB), a Sub-Carrier Group (SCG), a Resource Element Group (REG), a PRB pair, an RB pair, etc.

[0256] Also, a resource block may be composed of one or more Resource Elements (REs). For example, 1 RE may be a radio resource region of 1 sub-carrier and 1 symbol.

[0257] A Bandwidth Part (BWP) (which may also be referred to as a partial bandwidth, etc.) may represent a subset of consecutive common resource blocks (common RBs) for a certain numerology in a certain carrier. Here, the common RB may be specified by the index of the RB based on the common reference point of the carrier. The PRB is defined in a certain BWP and may be numbered within that BWP.

[0258] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be set within one carrier for a UE.

[0259] At least one of the set BWPs may be active, and the UE may not be assumed to transmit and receive a predetermined signal / channel outside the active BWP. Note that "cell", "carrier", etc. in the present disclosure may be read as "BWP".

[0260] The above-mentioned structures of radio frames, subframes, slots, minislots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

[0261] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0262] The names used for parameters and the like in this disclosure are not limiting in any way. Furthermore, the formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

[0263] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0264] Furthermore, information, signals, etc. may 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 / output via a plurality of network nodes.

[0265] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0266] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0267] The physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. The MAC signaling may be notified, for example, by using a MAC Control Element (CE).

[0268] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0269] The determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented as true or false, or by comparing numerical values ​​(e.g., with a predetermined value).

[0270] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0271] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0272] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0273] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," and the like may be used interchangeably.

[0274] In this disclosure, terms such as "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 a macro cell, a small cell, a femto cell, a pico cell, etc.

[0275] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0276] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0277] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0278] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may include a device that does not necessarily move during 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.

[0279] Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect / embodiment 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 (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, an uplink channel, a downlink channel, etc. may be read as a sidelink channel.

[0280] Similarly, the user terminal in the present disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0281] In the present disclosure, an operation performed by a base station may be performed by its upper node in some cases. It is clear that in a network including one or more network nodes having base stations, various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0282] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect / embodiment described in this disclosure may be reordered unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0283] Each aspect / embodiment described in the present disclosure may be implemented using any of a wide variety of standards, including Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems using 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other appropriate wireless communication methods, next-generation systems that are based on these, etc. Also, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0284] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0285] Any reference to an element using a designation such as "first," "second," etc., 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, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.

[0286] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, and the like.

[0287] A "determining" may also be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.

[0288] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. That is, "determination" may be considered to be "deciding" to perform some action.

[0289] Additionally, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc.

[0290] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, may mean the nominal UE maximum transmit power, or may mean the rated UE maximum transmit power.

[0291] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0292] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, and the like, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, and the like, as some non-limiting and non-exhaustive examples.

[0293] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0294] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0295] In this disclosure, where articles have been added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0296] Although the invention according to the present disclosure has been described in detail above, it is clear 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 modified and altered forms without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the invention according to the present disclosure.

Claims

1. A receiving unit that receives a signal for determining a plurality of terminals that share uplink data; A control unit that controls, based on the signal, either reception of the uplink data from another terminal among the plurality of terminals or transmission of the uplink data to the other terminal; The receiver receives downlink control information that schedules reception of one repetition of the multiple repetitions of the uplink data and transmission of the received repetition; A terminal in which the receiving unit receives one repetition out of multiple repetitions of the uplink data based on the downlink control information, and the control unit controls transmission of the received repetition based on the downlink control information.

2. the signal includes a measurement result by the other terminal; The terminal according to claim 1 , wherein the control unit determines an identifier corresponding to each of the plurality of terminals based on the measurement result.

3. The terminal according to claim 1 or 2, wherein the control unit controls transmission of control information instructing the other terminal to receive the uplink data and transmit the uplink data.

4. receiving a signal for determining a plurality of terminals sharing uplink data; controlling, based on the signal, one of receiving the uplink data from another terminal among the plurality of terminals and transmitting the uplink data to the other terminal; receiving downlink control information scheduling reception of one repetition of the plurality of repetitions of the uplink data and transmission of the received repetition; A wireless communication method for a terminal, which receives one of multiple repetitions of the uplink data based on the downlink control information, and controls transmission of the received repetition based on the downlink control information.

5. A receiving unit that receives a signal for determining a plurality of terminals that share uplink data; a control unit that controls, based on the signal, a first terminal among the plurality of terminals to either receive the uplink data from a second terminal among the plurality of terminals or transmit the uplink data to the second terminal; A base station having a transmitter that transmits downlink control information to the first terminal or the second terminal, the downlink control information scheduling the reception of one of multiple repetitions of the uplink data and the transmission of the received repetition.

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