Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is a terminal that supports full-duplex communication, and is provided with: a reception unit that receives information relating to either a reference for timing of uplink transmission or a reference for timing of downlink reception; and a control unit that, on the basis of the information, controls the uplink transmission and the downlink reception by matching a reference for the timing of the uplink transmission with a reference for the timing of the downlink reception. According to one mode of the disclosure, the utilization efficiency of resources can be improved.

Description

Technical Field

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

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) is standardized for the purpose of further high-speed data rate, low latency, etc. (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) is standardized for the purpose of further increasing the capacity and sophistication of LTE (Release (Rel.) 8, 9 of the Third Generation Partnership Project (3GPP)).

[0003] Successor systems of LTE (also called, for example, fifth generation mobile communication system (5G), 5G+(plus), sixth generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.) are also being studied.

[0004] Prior art literature

[0005] Non-patent literature

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

[0007] Problems to be solved by the invention

[0008] In future wireless communication systems, it is envisioned that a plurality of user terminals (user terminals, User Equipment (UE)) will communicate in an ultra-high density and high traffic environment.

[0009] In such an environment, communication using full duplex (FD) is being studied as one of the purposes of improving resource utilization efficiency.

[0010] However, in the NR specifications to date, the communication method using FD has not been fully studied. If this method is not fully studied, there is a concern that system performance will be reduced, such as increased latency and reduced coverage performance.

[0011] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that improve resource utilization efficiency.

[0012] Means for solving problems

[0013] A terminal involved in one method of the present disclosure is a terminal that supports full-duplex communication, and comprises: a receiving unit that receives information related to either a timing benchmark for uplink transmission and a timing benchmark for downlink reception; and a control unit that, based on the information, makes the timing benchmark for uplink transmission and the timing benchmark for downlink reception consistent, and controls the uplink transmission and the downlink reception.

[0014] Effects of the Invention

[0015] According to one aspect of the present disclosure, it is possible to improve resource utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 1A to 1E are diagrams showing an example of a duplex system.

[0017] FIG. 2 is a diagram showing an example of transmission and reception timing of a base station / UE according to a conventional specification.

[0018] FIG. 3 is a diagram showing an example of transmission / reception timing of a base station / UE according to option 1-1.

[0019] FIG. 4 is a diagram showing an example of transmission / reception timing of a base station / UE according to option 1-2.

[0020] FIG. 5 is a diagram showing an example of transmission / reception timing of a base station / UE according to option 2-1.

[0021] FIG6 is a diagram showing an example of transmission / reception timing of a base station / UE according to option 2-2.

[0022] FIG7 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0023] FIG8 is a diagram showing an example of a configuration of a base station according to an embodiment.

[0024] FIG. 9 is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0025] FIG10 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment.

[0026] FIG. 11 is a diagram showing an example of a vehicle according to an embodiment. DETAILED DESCRIPTION

[0027] In future wireless communication systems, higher performance requirements and diverse use cases are envisioned.

[0028] As examples of various use cases, ultra-coverage enhancement / ultra-long-distance communication, ultra-large capacity, ultra-reliability communication, virtual cells (User-centric no cell), flexible networks (Network (NW)), and mesh NW / sidelink are considered.

[0029] In future wireless communication systems (for example, Rel. 18 and later), standardization and practical application of communication using full duplex (FD) are being studied.

[0030] Regarding initial access methods, we are also studying the various use cases mentioned above and the design of communications using FD.

[0031] As a duplex mode, the method shown in FIG. 1A to FIG. 1E is considered.

[0032] The base station and the UE communicate by switching the same frequency band in time in uplink (UL) and downlink (DL) (Time Division Duplex (TDD), see FIG. 1A ). In this case, the base station and the UE do not perform FD operation.

[0033] The base station divides the frequency for UL and DL communications of multiple UEs at the same time (Frequency Division Duplex (FDD) , see Figure 1B). In this case, the base station performs FD operation, and the UE does not perform FD operation. In addition, the frequency resources of UL and DL do not overlap.

[0034] The base station communicates with multiple UEs using the same time / frequency resources (spatial multiplexing) for UL and DL communications (see FIG. 1C ). In this case, the base station performs FD operation, and the UE does not perform FD operation. In addition, the UL frequency resources and the DL frequency resources (all or at least part) overlap.

[0035] The base station divides the frequency for UL and DL communications of one UE at the same time and performs communications (see FIG. 1D ). In this case, the base station and the UE perform FD operation. In addition, the frequency resources of UL and DL do not overlap.

[0036] The base station communicates with each UE's UL and DL using the same time / frequency resources (spatial multiplexing) (see FIG. 1E ). In this case, the base station and the UE perform FD operation. In addition, the UL frequency resources and the DL frequency resources (all or at least part) overlap.

[0037] FD in which the UL frequency resources and the DL frequency resources do not overlap may also be called a sub-band based FD. FD in which the UL frequency resources and the DL frequency resources (all or at least part) overlap may also be called a spectrum sharing FD.

[0038] (analyze)

[0039] When the base station / UE performs FD operation, it is necessary to examine whether the transmission / reception timing of the base station / UE is matched based on a specific reference.

[0040] In half duplex (HD) duplexing in existing specifications (Rel. 15-17), the transmission timing of the UE is controlled to match the transmission timing of the base station with respect to the reception timing of the base station.

[0041] Fig. 2 is a diagram showing an example of the transmission and reception timing of a base station / UE in the existing specification. In Fig. 2, the transmission timing (reference) and reception timing (reference) of the base station (gNB) are consistent. The gNB / UE performs DL / UL transmission and reception assuming that their timings are consistent.

[0042] In the example shown in Figure 2, the gNB's (DL) transmission timing and (UL) reception timing are consistent, so the UE's UL transmission timing is earlier than the gNB's transmission / reception timing, and the UE's DL reception timing is later than the gNB's transmission / reception timing.

[0043] As described above, in existing specifications, (the reference of) the transmission timing and (the reference of) the reception timing of the UE are often different.

[0044] On the other hand, when the UE performs FD operation, it is also considered that there is a need to make (the reference of) the transmission timing and (the reference of) the reception timing of the UE consistent due to the structure and constraints of the UE.

[0045] However, there is still insufficient research on the transmission timing (reference) and reception timing (reference) in the UE when the FD operation is introduced. If these studies are insufficient, there is a concern that system performance may be degraded, such as increased latency and reduced coverage performance.

[0046] Therefore, the inventors of the present invention conceived of the transmission / reception timing of the UE when using FD.

[0047] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the embodiments may be applied individually or in combination.

[0048] In the present disclosure, "A / B" and "at least one of A and B" may be replaced with each other. In addition, in the present disclosure, "A / B / C" may also mean "at least one of A, B, and C".

[0049] In the present disclosure, activate, deactivate, indicate (or specify), select, configure, update, determine, etc. may also be replaced by each other. In the present disclosure, support, control, controllable, operate, and can operate may also be replaced by each other.

[0050] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, information elements (IE), settings, etc. may also be overwritten with each other. In the present disclosure, Medium Access Control (MAC Control Element (CE)), update commands, activation / deactivation commands, etc. may also be overwritten with each other.

[0051] 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.

[0052] In the present disclosure, MAC signaling may also use, for example, MAC Control Element (MACCE), MAC Protocol Data Unit (MAC Protocol Data Unit (PDU)), etc. Broadcast information may also be, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), Other System Information (Other System Information (OSI)), etc.

[0053] In the present disclosure, the physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI)), etc.

[0054] In the present disclosure, an index, an identifier (ID), an indicator, a resource ID, etc. may also be replaced by one another. In the present disclosure, a sequence, a list, a set, a group, a group, a cluster, a subset, etc. may also be replaced by one another.

[0055] In the present disclosure, panel, UE panel, panel group, beam, beam group, precoder, uplink (UL) transmission entity, transmission / reception point (Transmission / Reception Point (TRP)), base station, spatial relationship information (Spatial Relation Information (SRI)), spatial relationship, SRS resource indicator (SRSResource Indicator (SRI)), control resource set (COntrol REsource SET (CORESET)), physical uplink shared channel (Physical Downlink Shared Channel (PDSCH)), codeword (Codeword (CW)), transport block (Transport Block (TB)), reference signal (Reference Signal (RS)), antenna port (e.g., demodulation reference signal (DeModulation Reference Signal (DMRS)) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relationship group, code division multiplexing (Code Division Multiplexing (CDM)) group, reference signal group, CORESET group, physical uplink control channel (Physical Uplink Control Channel (PUCCH)) group, PUCCH resource group), resources (for example, reference signal resources, SRS resources), resource sets (for example, reference signal resource sets), CORESET pool, downlink transmission configuration indication state (Transmission Configuration Indicationstate (TCI state)) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, Quasi-Co-Location (QCL)), QCL assumptions, etc. can also be rewritten mutually.

[0056] In the present disclosure, node, base station, gNB, xNB (x is an arbitrary character), transmit / receive point (TRP), mobile station, terminal, user terminal (user terminal, user equipment (UE)) can also be rewritten.

[0057] In the present disclosure, the time domain (period / part) in which DL resources and UL resources in a specific number of CCs in the TDD band can be used simultaneously, XDD (Cross Division Duplex), XDD part, XDD period, XDD structure, first DL / UL part, first period, period in which DL reception / UL transmission is restricted, period in which DL and UL exist together, and period in which UL transmission can be performed during DL period can also be rewritten. XDD can also mean a duplex method in which DL and UL are frequency-division multiplexed (DL and UL can be used simultaneously) in one component carrier (CC) in the TDD band.

[0058] The DL / UL resources in the XDD part can also be overwritten with XDD DL / UL resources, XDD DL / UL, first DL / UL resources, and first DL / UL part. The DL / UL resources in the TDD band that do not overlap in time with UL can also be overwritten with non-XDD DL / UL resources, pure DL / UL resources, DL / UL resources that are not XDD, second DL / UL resources, second DL / UL part, second period, etc. XDD operation can indicate the operation during the period when the XDD DL / UL resources are set, or the overall operation of TDD where XDD can be used.

[0059] Furthermore, in the present disclosure, the DL / UL BWP in the TDD band, the DL / UL BWP defined before Rel. 15 / 16, and the normal DL / UL BWP may be rewritten.

[0060] In the present disclosure, the XDD part may also mean at least one of the time resource when the UL resource is configured in the same time resource as the DL resource, and the time resource when the DL resource is configured in the same time resource as the UL resource. In addition, the XDD part may also mean at least one of the time resource when the FL resource (resource that can be used for DL ​​and UL) is configured in the same time resource as the DL resource, and the time resource when the FL resource (resource that can be used for DL ​​and UL) is configured in the same time resource as the UL resource.

[0061] (Wireless Communication Method)

[0062] In the present disclosure, signal and channel may be replaced by each other. In the present disclosure, signal, channel, signal / channel, DL reception, DL transmission, UL transmission, and UL reception may be replaced by each other.

[0063] The UE may also receive information related to at least one of (a reference for) the timing of UL transmission and (a reference for) the timing of DL reception.

[0064] Based on this information, the UE may determine whether to make the timing (reference) of UL transmission and the timing (reference) of DL reception consistent.

[0065] The UE may also use the UL transmission timing and DL reception timing to control UL transmission / DL reception.

[0066] In the present disclosure, aligning the timing (reference) of UL transmission and the timing (reference) of DL reception may also include a situation where the difference between the timing (reference) of UL transmission and the timing (reference) of DL reception is at least within a specific range. Here, the specific range may be predefined / set in the specification or set by higher layer signaling (e.g., RRC / MACCE). In addition, the specific range may be variable based on at least one of the subcarrier spacing used in UL transmission and the subcarrier spacing used in DL transmission.

[0067] In the present disclosure, the timing of UL transmission in the UE, the benchmark of the timing of UL transmission in the UE, the timing of UL reception in the base station, the benchmark of the timing of UL reception in the base station, the timing of DL reception in the UE, the benchmark of the timing of DL reception in the UE, the timing of DL transmission in the base station, and the benchmark of the timing of DL transmission in the base station can also be rewritten with each other.

[0068] <First embodiment>

[0069] In the first embodiment, the reception timing of the UE may also match the transmission timing of the UE.

[0070] The UE may also assume that the UE's reception timing matches the UE's transmission timing.

[0071] The first embodiment is roughly divided into the following options 1-1 and 1-2. The UE may follow at least one of the following options 1-1 and 1-2.

[0072] 《Option 1-1》

[0073] The transmission timing of the UE in the FD operation may also be the same as the transmission timing of the UE in the HD operation. The UE may also assume that the transmission timing of the UE in the FD operation is consistent with the transmission timing of the UE in the HD operation.

[0074] The UE may also perform UL transmission based on the timing indicated by the base station (network).

[0075] The transmission timing of UL transmission performed by the UE may also be determined based on the existing Timing Advance (TA).

[0076] The UE may also control the transmission of a specific UL channel / signal based on information related to the transmission timing of the UL transmission (eg, information related to an existing TA) and information for scheduling / triggering a specific UL channel / signal.

[0077] The information for scheduling / triggering the specific UL channel / signal may also be notified to the UE using, for example, higher layer signaling (RRC / MAC CE) / DCI.

[0078] The specific UL channel / signal may be, for example, PUSCH / PUCCH / SRS / PRACH.

[0079] The base station may also match the reception timing of UL transmissions transmitted from multiple UEs. In other words, the base station may also receive UL transmissions transmitted from multiple UEs using the same reception timing (reference).

[0080] The transmission timings of a plurality of UEs may be determined separately in each UE. The base station may separately instruct the transmission timing for each UE.

[0081] The base station may also use specific timing for DL ​​transmission.

[0082] The transmission timing of DL transmission by the base station may also be in accordance with at least one of the following options 1-1-1 and 1-1-2.

[0083] [Option 1-1-1]

[0084] The base station may also derive the delay difference between the UE and the base station.

[0085] The derivation of the delay difference may be determined based on, for example, the reception timing of the UL transmission from the UE (that is, the reception timing of the base station).

[0086] The base station may also determine the transmission timing of DL transmission based on the delay difference and the reception timing (or the transmission timing of the base station in HD operation). For example, the base station may also perform DL transmission at a timing that is a specific time earlier than the reception timing (or the transmission timing of the base station in HD operation).

[0087] The specific time may be, for example, N (N is an integer, such as 2) times the delay difference.

[0088] In addition, the base station may determine the transmission timing of the base station based on the transmission timing of the UE indicated to the UE. The transmission timing of the base station may also be based on at least one of the transmission timing of the UE and the time for switching transmission and reception of the base station / UE.

[0089] For example, the base station may also decide that a timing that is earlier than the base station's receiving timing by N (N is an integer, such as 2) times the difference between the UE's sending timing (e.g., TA) and the base station's receiving timing (and the total of the time used by the base station / UE to switch sending and receiving) is the base station's sending timing.

[0090] The UE may also control the specific DL channel / signal based on at least one of information related to the transmission timing of the UL transmission performed by the UE (for example, information related to the TA) and information for scheduling / triggering the specific DL channel / signal.

[0091] The information for scheduling / triggering the specific DL channel / signal may also be notified to the UE using, for example, high-level signaling (RRC / MAC CE) / DCI. The information for scheduling / triggering the specific DL channel / signal may also be information for setting / indicating the (time) resource / timing / offset / receiving opportunity of the specific DL channel / signal.

[0092] The specific DL channel / signal may also be a UE-specific DL channel / signal. The specific DL channel / signal may also be, for example, PDSCH / PDCCH / CORESET / search space / CSI-RS.

[0093] [Option 1-1-2]

[0094] The UE may also send information related to the transmission timing of the base station to the base station (network).

[0095] The base station may also determine the transmission timing of the base station based on this information.

[0096] The information may also be information indicating the transmission timing of the base station with respect to the reception timing of the UE (or requesting the base station to transmit at a timing that is a specific time earlier than the reception timing of the UE). The transmission timing of the base station with respect to the reception timing of the UE may be expressed by a specific number of specific time resources (e.g., symbol / subframe / time slot / subtime slot) or by a specific time (e.g., ms unit).

[0097] The UE may also send the information periodically. In addition, the UE may also send the information when a specific condition is met (as needed).

[0098] The base station may also send feedback information regarding the information to the UE.

[0099] The UE may also control the specific DL channel / signal based on at least one of information related to the transmission timing of the UL transmission performed by the UE (for example, information related to the TA) and information for scheduling / triggering the specific DL channel / signal.

[0100] The information for scheduling / triggering the specific DL channel / signal may also be notified to the UE using, for example, high-layer signaling (RRC / MAC CE) / DCI. The information for scheduling / triggering the specific DL channel / signal may also be information for setting / indicating the (time) resource / timing / offset / receiving opportunity of the specific DL channel / signal.

[0101] The specific DL channel / signal may also be a UE-specific DL channel / signal. The specific DL channel / signal may also be, for example, PDSCH / PDCCH / CORESET / search space / CSI-RS.

[0102] In at least one of the above options 1-1-1 and 1-1-2, the base station may also set / instruct switching / changing of the transmission timing of the UE-based HD operation and the transmission timing of the FD operation based on specific conditions / opportunities / events.

[0103] The specific condition / opportunity / event may be based on the UE capability (reported UE capability information) or the communication status of the UE / base station. The base station may also explicitly / implicitly set / instruct the UE regarding the transmission timing based on the HD operation / FD operation. In other words, the UE may also be set / instructed regarding the transmission timing in the HD operation and the transmission timing in the FD operation.

[0104] The specific condition may also be, for example, the type of channel / signal sent by the UE. For example, the base station may also set / instruct to send a first signal / channel at a first timing (for example, a timing based on an HD operation) and to send a second signal / channel at a second timing (for example, a timing based on an FD operation). The first signal / channel may also be, for example, a signal associated with initial access (for example, a channel for random access), and the second signal / channel may also be a data channel (for example, PUSCH) / control channel (PDCCH).

[0105] Fig. 3 is a diagram showing an example of the transmission / reception timing of the base station / UE involved in Option 1-1. In the example shown in Fig. 3, an example of the transmission / reception timing of the base station / UE involved in Option 1-1 is shown in comparison with the transmission / reception timing of the base station / UE in the conventional HD operation.

[0106] In the example shown in Figure 3, the reception (Rx) timing of the base station (gNB) in FD operation is consistent with the reception timing of the base station in HD operation. Therefore, the transmission (Tx) timing of the UE starts earlier in time than the reception timing of the base station.

[0107] In the example shown in Fig. 3, the reception timing of the UE matches the transmission timing of the UE. Therefore, the transmission timing of the base station starts earlier in time than the transmission / reception timing of the UE.

[0108] 《Option 1-2》

[0109] The UE may perform UL transmission based on a specific timing pre-defined in the specification or a specific timing set by the base station (network).

[0110] This specific transmission timing may be consistent with the transmission (or reception) timing of the base station in HD operation, for example.

[0111] The UE may also derive / determine the specific timing based on specific information.

[0112] For example, the specific information may be information based on the location information of the UE (eg, information derived based on the Global Navigation Satellite System (GNSS)).

[0113] For example, the UE may also be notified of the specific information from the base station. The information notified from the base station may also be, for example, information related to the TA. In addition, for example, the information notified from the base station may also be parameters required for deriving the transmission timing (for example, used by the IAB node).

[0114] In this case, the transmission timings of the plurality of UEs may be determined separately in each UE. The base station may separately instruct the transmission timing for each UE.

[0115] The base station may also use specific timing for DL ​​transmission.

[0116] The transmission timing of DL transmission by the base station may also be in accordance with at least one of the following options 1-2-1 and 1-2-2.

[0117] [Option 1-2-1]

[0118] The base station may also derive the delay difference between the UE and the base station.

[0119] The derivation of the delay difference may be determined based on, for example, the reception timing of the UL transmission from the UE (that is, the reception timing of the base station).

[0120] The base station may also determine the transmission timing of DL transmission based on the delay difference and the reception timing (or the transmission timing of the base station in HD operation). For example, the base station may also perform DL transmission at a timing that is a specific time earlier than the reception timing (or the transmission timing of the base station in HD operation).

[0121] The specific time may be, for example, N (N is an integer, such as 2) times the delay difference.

[0122] In addition, the base station may determine the transmission timing of the base station based on the transmission timing of the UE indicated to the UE. The transmission timing of the base station may also be based on at least one of the transmission timing of the UE and the time for switching transmission and reception of the base station / UE.

[0123] For example, the base station may determine that the base station's transmission timing is N (N is an integer, such as 2) times earlier than the base station's reception timing than the UE's transmission timing (eg, TA).

[0124] The UE may also control the specific DL channel / signal based on at least one of information related to the transmission timing of the UL transmission performed by the UE (for example, information related to the TA) and information for scheduling / triggering the specific DL channel / signal.

[0125] The information for scheduling / triggering the specific DL channel / signal may also be notified to the UE using, for example, high-level signaling (RRC / MAC CE) / DCI. The information for scheduling / triggering the specific DL channel / signal may also be information for setting / indicating the (time) resource / timing / offset / receiving opportunity of the specific DL channel / signal.

[0126] The specific DL channel / signal may also be a UE-specific DL channel / signal. The specific DL channel / signal may also be, for example, PDSCH / PDCCH / CORESET / search space / CSI-RS.

[0127] [Option 1-2-2]

[0128] The UE may also send information related to the transmission timing of the base station to the base station (network).

[0129] The base station may also determine the transmission timing of the base station based on this information.

[0130] The information may also be information indicating the transmission timing of the base station with respect to the reception timing of the UE (or requesting the base station to transmit at a timing that is a specific time earlier than the reception timing of the UE). The transmission timing of the base station with respect to the reception timing of the UE may be expressed by a specific number of specific time resources (e.g., symbol / subframe / time slot / subtime slot) or by a specific time (e.g., ms unit).

[0131] The UE may also send the information periodically. In addition, the UE may also send the information when a specific condition is met (as needed).

[0132] The base station may also send feedback information regarding the information to the UE.

[0133] The UE may also control the specific DL channel / signal based on at least one of information related to the transmission timing of the UL transmission performed by the UE (for example, information related to the TA) and information for scheduling / triggering the specific DL channel / signal.

[0134] The information for scheduling / triggering the specific DL channel / signal may also be notified to the UE using, for example, high-layer signaling (RRC / MAC CE) / DCI. The information for scheduling / triggering the specific DL channel / signal may also be information for setting / indicating the (time) resource / timing / offset / receiving opportunity of the specific DL channel / signal.

[0135] The specific DL channel / signal may also be a UE-specific DL channel / signal. The specific DL channel / signal may also be, for example, PDSCH / PDCCH / CORESET / search space / CSI-RS.

[0136] In at least one of the above options 1-2-1 and 1-2-2, the base station may also set / instruct switching / changing of the transmission timing of the HD operation based on the UE and the transmission timing of the FD operation based on specific conditions / opportunities / events.

[0137] The specific condition / opportunity / event may be based on the UE capability (reported UE capability information) or the communication status of the UE / base station. The base station may also explicitly / implicitly set / instruct the UE regarding the transmission timing based on the HD operation / FD operation. In other words, the UE may also be set / instructed regarding the transmission timing in the HD operation and the transmission timing in the FD operation.

[0138] The specific condition may also be, for example, the type of channel / signal sent by the UE. For example, the base station may also set / instruct to send a first signal / channel at a first timing (for example, a timing based on an HD operation) and to send a second signal / channel at a second timing (for example, a timing based on an FD operation). The first signal / channel may also be, for example, a signal associated with initial access (for example, a channel for random access), and the second signal / channel may also be a data channel (for example, PUSCH) / control channel (PDCCH).

[0139] Fig. 4 is a diagram showing an example of the transmission / reception timing of the base station / UE involved in Option 1-2. In the example shown in Fig. 4, an example of the transmission / reception timing of the base station / UE involved in Option 1-2 is shown in comparison with the transmission / reception timing of the base station / UE in the conventional HD operation.

[0140] In the example shown in Fig. 4, the transmission (Tx) / reception (Rx) timing of the UE in FD operation coincides with the reception (or, transmission) timing of the base station in HD operation. Therefore, the transmission timing of the base station starts earlier in time than the reception timing of the UE.

[0141] In the example shown in Fig. 4, the reception timing of the UE matches the transmission timing of the UE. Therefore, the reception timing of the base station starts later in time than the transmission timing of the UE.

[0142] According to the above first embodiment, even when the FD operation is performed, the transmission / reception timing (reference) of the UE and the base station can be appropriately determined.

[0143] <Second embodiment>

[0144] In the second embodiment, the transmission timing of the UE may also be matched with the reception timing of the UE.

[0145] The UE may also assume that the UE's transmission timing matches the UE's reception timing.

[0146] The second embodiment is roughly divided into the following options 2-1 and 2-2. The UE may follow at least one of the following options 2-1 and 2-2.

[0147] 《Option 2-1》

[0148] The reception timing of the UE in the FD operation may also be the same as the reception timing of the UE in the HD operation. The UE may also assume that the reception timing of the UE in the FD operation is consistent with the reception timing of the UE in the HD operation.

[0149] The UE may also perform DL reception based on the timing indicated from the base station (network).

[0150] At this time, the UE may also perform UL transmission at the timing of DL reception. In other words, the UE may also match the transmission timing with the reception timing.

[0151] For UL transmission in FD operation, the UE may also not use information related to the timing of UL transmission in HD operation (eg, information related to the TA).

[0152] At this time, the transmission timing of the UE and the reception timing of the base station may be determined separately for each UE.

[0153] The base station may also use specific timing for UL reception.

[0154] The base station can also estimate / judge the specific timing (timing of UL reception).

[0155] The estimation / determination of the reception timing of the base station may be performed according to at least one of the following options 2-1-1 and 2-1-2.

[0156] [Option 2-1-1]

[0157] The base station can also estimate / judge the reception timing of the base station based on the received signal.

[0158] The received signal may also be a signal transmitted from the UE. The signal transmitted from the UE may also be a transmission signal of the UE in HD operation.

[0159] The base station can also set / instruct: in the UE, signals associated with initial access (for example, channels for random access (RACH / PRACH)) are sent at a timing based on HD operations, and data channels (for example, PUSCH) / control channels (PDCCH) are sent at a timing based on FD operations.

[0160] At this time, the base station may estimate / judge / assume the reception timing in the FD operation based on the reception timing of a signal (for example, a random access channel (RACH / PRACH)) transmitted from the UE.

[0161] [Option 2-1-2]

[0162] The UE may also send information related to the transmission timing of the UE (or the reception timing of the base station) to the base station (network).

[0163] The base station can also estimate / judge the reception timing of the base station based on this information.

[0164] This information may, for example, represent an offset related to the transmission timing of the UE in FD operation with respect to a specific reference.

[0165] For example, the information may be information indicating the difference (offset) between the transmission timing of the UE in the HD operation and the transmission timing of the UE in the FD operation.

[0166] Furthermore, for example, the information may be information indicating the difference (offset) of the UE transmission timing in the FD operation with respect to the transmission timing of the base station.

[0167] The base station may also send feedback information regarding the information to the UE.

[0168] The base station may also set / instruct switching / changing of the HD operation and FD operation of the UE based on the received information.

[0169] In at least one of the above options 2-1-1 and 2-1-2, the base station may also set / instruct switching / changing of the transmission timing of the HD operation based on the UE and the transmission timing of the FD operation based on a specific condition / opportunity / event. In other words, the UE may also be set / instructed to switch / change the transmission timing in the HD operation and the transmission timing in the FD operation.

[0170] The specific condition / opportunity / event may be based on the UE capability (reported UE capability information) or the communication status between the UE and the base station. The base station may also explicitly / implicitly set / instruct the UE on the transmission timing based on the HD operation / FD operation.

[0171] The specific condition may also be, for example, the type of channel / signal sent by the UE. For example, the base station may also set / instruct: to send a first signal / channel at a first timing (for example, a timing based on an HD operation), and to send a second signal / channel at a second timing (for example, a timing based on an FD operation). The first signal / channel may also be, for example, a signal associated with initial access (for example, a channel for random access), and the second signal / channel may also be a data channel (for example, PUSCH) / control channel (PDCCH).

[0172] Fig. 5 is a diagram showing an example of the transmission / reception timing of the base station / UE involved in Option 2-1. In the example shown in Fig. 5, an example of the transmission / reception timing of the base station / UE involved in Option 2-1 is shown in comparison with the transmission / reception timing of the base station / UE in the conventional HD operation.

[0173] In the example shown in Fig. 5, the reception (Rx) timing of the UE in FD operation is consistent with the reception timing of the UE in HD operation. Therefore, the transmission (Tx) timing of the base station is also consistent with the transmission timing of the base station in HD operation.

[0174] In the example shown in Fig. 5, the transmission timing of the UE matches the reception timing of the UE. Therefore, the reception timing of the base station starts later in time than the transmission timing of the UE.

[0175] Option 2-2

[0176] The UE may perform DL reception based on a specific timing that is pre-defined in the specification or a specific timing that is set from the base station (network).

[0177] This specific reception timing may be consistent with the transmission (or reception) timing of the base station in HD operation, for example.

[0178] The UE may also derive / determine the specific timing based on specific information.

[0179] For example, the specific information may be information based on the location information of the UE (eg, information derived based on the Global Navigation Satellite System (GNSS)).

[0180] For example, the UE may also be notified of the specific information from the base station. The information notified from the base station may also be, for example, information related to the TA. In addition, for example, the information notified from the base station may also be parameters required for deriving the transmission timing (for example, used by the IAB node).

[0181] The UE may also control the specific DL channel / signal based on at least one of the specific information and the information for scheduling / triggering the specific DL channel / signal.

[0182] The information for scheduling / triggering the specific DL channel / signal may also be notified to the UE using, for example, high-level signaling (RRC / MAC CE) / DCI. The information for scheduling / triggering the specific DL channel / signal may also be information for setting / indicating the (time) resource / timing / offset / receiving opportunity of the specific DL channel / signal.

[0183] The specific DL channel / signal may also be a UE-specific DL channel / signal. The specific DL channel / signal may also be, for example, PDSCH / PDCCH / CORESET / search space / CSI-RS.

[0184] The UE may also perform UL transmission at the timing of DL reception. In other words, the UE may also match the transmission timing with the reception timing.

[0185] The transmission timing of the UE and the reception timing of the base station may be determined separately for each UE.

[0186] The base station may also use specific timing for UL reception.

[0187] The base station can also estimate / judge the specific timing (timing of UL reception).

[0188] The estimation / determination of the reception timing of the base station may be performed according to at least one of the following options 2-2-1 and 2-2-2.

[0189] [Option 2-2-1]

[0190] The base station can also estimate / judge the reception timing of the base station based on the received signal.

[0191] The received signal may also be a signal transmitted from the UE. The signal transmitted from the UE may also be a transmission signal of the UE in HD operation.

[0192] The base station can also set / instruct: in the UE, signals associated with initial access (for example, channels for random access (RACH / PRACH)) are sent at a timing based on HD operations, and data channels (for example, PUSCH) / control channels (PDCCH) are sent at a timing based on FD operations.

[0193] At this time, the base station may estimate / judge / assume the reception timing in the FD operation based on the reception timing of a signal (for example, a random access channel (RACH / PRACH)) transmitted from the UE.

[0194] [Option 2-2-2]

[0195] The UE may also send information related to the transmission timing of the UE (or the reception timing of the base station) to the base station (network).

[0196] The base station can also estimate / judge the reception timing of the base station based on this information.

[0197] This information may, for example, represent an offset related to the transmission timing of the UE in FD operation with respect to a specific reference.

[0198] For example, the information may be information indicating the difference (offset) between the transmission timing of the UE in the HD operation and the transmission timing of the UE in the FD operation.

[0199] Furthermore, for example, the information may be information indicating the difference (offset) of the UE transmission timing in the FD operation with respect to the transmission timing of the base station.

[0200] The base station may also send feedback information regarding the information to the UE.

[0201] The base station may also set / instruct switching / changing of the HD operation and FD operation of the UE based on the received information.

[0202] In at least one of the above options 2-1-1 and 2-1-2, the base station may also set / instruct switching / changing of the transmission timing of the HD operation based on the UE and the transmission timing of the FD operation based on a specific condition / opportunity / event. In other words, the UE may also be set / instructed to switch / change the transmission timing in the HD operation and the transmission timing in the FD operation.

[0203] The specific condition / opportunity / event may be based on the UE capability (reported UE capability information) or the communication status between the UE and the base station. The base station may also explicitly / implicitly set / instruct the UE on the transmission timing based on the HD operation / FD operation.

[0204] The specific condition may also be, for example, the type of channel / signal sent by the UE. For example, the base station may also set / instruct: to send a first signal / channel at a first timing (for example, a timing based on an HD operation), and to send a second signal / channel at a second timing (for example, a timing based on an FD operation). The first signal / channel may also be, for example, a signal associated with initial access (for example, a channel for random access), and the second signal / channel may also be a data channel (for example, PUSCH) / control channel (PDCCH).

[0205] Fig. 6 is a diagram showing an example of the transmission / reception timing of the base station / UE involved in Option 2-2. In the example shown in Fig. 6, an example of the transmission / reception timing of the base station / UE involved in Option 2-2 is shown in comparison with the transmission / reception timing of the base station / UE in the conventional HD operation.

[0206] In the example shown in Fig. 6, the transmission (Tx) / reception (Rx) timing of the UE in FD operation coincides with the reception (or, transmission) timing of the base station in HD operation. Therefore, the transmission timing of the base station starts earlier in time than the reception timing of the UE.

[0207] In the example shown in Fig. 6, the transmission timing of the UE matches the reception timing of the UE. Therefore, the reception timing of the base station starts later in time than the transmission timing of the UE.

[0208] According to the second embodiment described above, even when the FD operation is performed, it is possible to appropriately determine (the reference of) the transmission / reception timing of the UE and the base station.

[0209] <Other embodiments>

[0210] A higher layer parameter (RRCIE) / UE capability corresponding to at least one of the functions (features) in the above embodiments may also be specified. The UE capability may also indicate support for the function.

[0211] A UE to which a higher layer parameter corresponding to the function is set (to activate the function) can also perform the function. It may also be stipulated that "a UE to which a higher layer parameter corresponding to the function is not set does not perform the function (for example, in accordance with Rel. 15 / 16 / 17)".

[0212] A UE that has reported UE capabilities indicating support for the function may also perform the function. It may also be stipulated that “a UE that has not reported UE capabilities indicating support for the function does not perform the function (for example, in accordance with Rel. 15 / 16 / 17)”.

[0213] If the UE reports the UE capability that supports the function and the high-level parameters corresponding to the function are set, the UE may also perform the function. It may also be stipulated that "if the UE does not report the UE capability that supports the function or the high-level parameters corresponding to the function are not set, the UE does not perform the function (for example, in accordance with Rel.15 / 16 / 17)".

[0214] UE capability may also indicate whether the UE supports the function.

[0215] The function may also be reception of DL signals / channels and transmission of UL signals / channels in the same time resources.

[0216] UE capabilities may also be defined by whether it supports reception of DL signals / channels and transmission of UL signals / channels in the same time resources.

[0217] UE capabilities may also be defined by whether or not switching / changing of transmission / reception timing in FD operation is supported.

[0218] According to the above other implementation modes, the UE can also implement the above functions while maintaining compatibility with existing specifications.

[0219] (Wireless Communication System)

[0220] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using any one of the wireless communication methods according to the above-mentioned embodiments of the present disclosure or a combination thereof.

[0221] Fig. 7 is a diagram showing an example of a schematic structure of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5G NR), or the like.

[0222] In addition, the wireless communication system 1 may also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC may also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (E-UTRA-NR Dual Connectivity (EN-DC))), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC))), etc.

[0223] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0224] The wireless communication system 1 may also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0225] The wireless communication system 1 may also include a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The configuration and number of each cell and user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as base stations 10.

[0226] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

[0227] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (below 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to these. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0228] Furthermore, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

[0229] Multiple base stations 10 may also be connected by wire (e.g., optical fiber based on Common Public Radio Interface (CPRI), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station (relay) may also be referred to as an IAB node.

[0230] The base station 10 may be connected to the core network 30 via other base stations 10 or directly. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0231] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0232] In the wireless communication system 1, a wireless access method based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. may be used.

[0233] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the radio access schemes for UL and DL.

[0234] As downlink channels, the wireless communication system 1 may use a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20 , a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc.

[0235] In addition, as uplink channels, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. can also be used in the wireless communication system 1.

[0236] User data, high-layer control information, System Information Block (SIB), etc. are transmitted through PDSCH. User data, high-layer control information, etc. can also be transmitted through PUSCH. In addition, Master Information Block (MIB) can also be transmitted through PBCH.

[0237] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0238] In addition, the DCI for scheduling the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be rewritten as DL data, and the PUSCH may also be rewritten as UL data.

[0239] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space setting.

[0240] A search space may also correspond to a PDCCH candidate corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be rewritten mutually.

[0241] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also known as hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR) can also be transmitted through PUCCH. The random access preamble used to establish a connection with a cell can also be transmitted through PRACH.

[0242] In the present disclosure, downlink, uplink, etc. may be expressed without “link.” In addition, various channels may be expressed without “Physical” at the beginning.

[0243] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. can also be transmitted. As DL-RS, in the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. can also be transmitted.

[0244] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as SS / PBCH block, SS block (SS Block (SSB)), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0245] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. may also be transmitted. In addition, DMRS may also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0246] (Base Station)

[0247] 8 is a diagram showing an example of a structure of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmitting and receiving unit 120, a transmitting and receiving antenna 130, and a transmission path interface (transmission line interface) 140. In addition, the control unit 110, the transmitting and receiving unit 120, the transmitting and receiving antenna 130, and the transmission path interface 140 may each be provided with more than one.

[0248] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0249] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0250] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc. using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be sent as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting, release, etc.) of communication channels, state management of the base station 10, management of wireless resources, etc.

[0251] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0252] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured by a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0253] The transmitting / receiving antenna 130 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0254] The transmitting and receiving unit 120 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

[0255] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0256] The sending and receiving unit 120 (sending processing unit 1211), for example, may also perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 110, to generate a bit string to be sent.

[0257] The transmitting and receiving unit 120 (transmitting processing unit 1211) may also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output a baseband signal.

[0258] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0259] On the other hand, the transmission and reception unit 120 (RF unit 122 ) may also perform amplification, filter processing, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmission and reception antenna 130 .

[0260] The transmitting and receiving unit 120 (receiving processing unit 1212) may also apply receiving processing such as analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to obtain user data, etc.

[0261] The transmitting and receiving unit 120 (the measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., reference signal received power (RSRP)), received quality (e.g., reference signal received quality (RSRQ), signal to interference plus noise ratio (SINR), signal to noise ratio (SNR)), signal strength (e.g., received signal strength indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0262] The transmission path interface 140 can also send and receive signals (return signaling) between devices included in the core network 30, other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0263] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission and reception unit 120 , the transmission and reception antenna 130 , and the transmission path interface 140 .

[0264] The base station 10 may also support full-duplex communication. The transmitting and receiving unit 120 may also transmit information related to either a timing reference of uplink transmission in the terminal or a timing reference of downlink reception in the terminal. The control unit 110 may also use the information to instruct the terminal as follows: an instruction related to making the timing reference of the uplink transmission and the timing reference of the downlink reception consistent; and an instruction of the uplink transmission and the downlink reception (first and second embodiments).

[0265] (User terminal)

[0266] 9 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. In addition, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided with one or more.

[0267] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0268] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0269] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission and reception unit 220.

[0270] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0271] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0272] The transmitting / receiving antenna 230 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0273] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0274] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0275] The sending and receiving unit 220 (sending processing unit 2211) may also perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0276] The transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output a baseband signal.

[0277] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is valid (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0278] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0279] On the other hand, the transmission and reception unit 220 (RF unit 222 ) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmission and reception antenna 230 .

[0280] The sending and receiving unit 220 (receiving processing unit 2212) can also apply receiving processing such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0281] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to the received signal. For example, the measuring unit 223 may also perform RRM measurement, CSI measurement, etc. based on the received signal. The measuring unit 223 may also measure the received power (e.g., RSRP), the received quality (e.g., RSRQ, SINR, SNR), the signal strength (e.g., RSSI), the propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0282] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0283] The user terminal 20 may also support full-duplex communication. The transmitting and receiving unit 220 may also receive information related to either a timing reference for uplink transmission or a timing reference for downlink reception. The control unit 210 may also make the timing reference for uplink transmission and the timing reference for downlink reception consistent based on the information, and control the uplink transmission and the downlink reception (first and second embodiments).

[0284] The control unit 210 may determine whether to make the timing reference of the downlink reception and the timing reference of the uplink transmission consistent with each other (first embodiment).

[0285] The control unit 210 may determine whether to make the timing reference of the uplink transmission and the timing reference of the downlink reception coincide with each other (second embodiment).

[0286] The transmission / reception unit 220 may receive the information related to the timing for full-duplex communication and the information related to the timing for half-duplex communication (first and second embodiments).

[0287] (Hardware structure)

[0288] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block of a functional unit. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, by wire, wireless, etc.) and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0289] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method thereof is not particularly limited.

[0290] For example, the base station, user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. FIG10 is a diagram showing an example of a hardware structure of a base station and a user terminal involved in one embodiment. The above-mentioned base station 10 and user terminal 20 may also be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0291] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, and unit can be interchanged. The hardware configuration of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or may exclude some of the devices.

[0292] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be performed by one processor, or may be performed by two or more processors simultaneously, sequentially, or in other ways. In addition, the processor 1001 may also be implemented by one or more chips.

[0293] The functions of the base station 10 and the user terminal 20 are realized, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0294] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, etc. For example, at least a part of the control unit 110 (210), the transmission and reception unit 120 (220), etc. described above may also be implemented by the processor 1001.

[0295] In addition, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that causes a computer to perform at least a part of the operations described in the above-mentioned embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the other functional blocks can also be implemented in the same way.

[0296] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or other appropriate storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0297] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray (Blu-ray) (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other suitable storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0298] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) may also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0299] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that performs output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0300] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0301] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0302] (Variation)

[0303] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may be rewritten one another. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc. depending on the applied standard. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0304] A radio frame may also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) constituting a radio frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is not dependent on a parameter set (numerology).

[0305] Here, the parameter set may also be a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of the subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, wireless frame structure, specific filter processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, etc.

[0306] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0307] A time slot may also contain multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of a smaller number of symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0308] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be replaced with each other.

[0309] For example, a subframe may be referred to as a TTI, a plurality of consecutive subframes may be referred to as a TTI, and a time slot or a mini time slot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0310] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited to this.

[0311] TTI can also be a transmission time unit for a data packet (transport block), code block, code word, etc. that has been channel-coded, and can also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (for example, the number of symbols) to which a transport block, code block, code word, etc. is actually mapped can also be shorter than the TTI.

[0312] In addition, when a time slot or a mini time slot is called a TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) may also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling may also be controlled.

[0313] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0314] In addition, a long TTI (eg, normal TTI, subframe, etc.) may be rewritten as a TTI having a time length exceeding 1 ms, and a short TTI (eg, shortened TTI, etc.) may be rewritten as a TTI having a TTI length shorter than that of a long TTI and longer than 1 ms.

[0315] Resource Block (RB) is a resource allocation unit in the time domain and frequency domain, and may also include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0316] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks, respectively.

[0317] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0318] In addition, a resource block may be composed of one or more resource elements (RE). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0319] Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) can also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, common RBs can also be identified by the index of the RB based on the common reference point of the carrier. PRBs can also be defined in a BWP and numbered within the BWP.

[0320] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured in one carrier.

[0321] At least one of the set BWPs may be activated, and the UE may not assume that it will transmit or receive a specific signal / channel other than the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be rewritten as "BWP".

[0322] In addition, the above-mentioned structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots per subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0323] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by a specific index.

[0324] In the present disclosure, the names used for parameters, etc. are not limiting in all respects. Furthermore, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not limiting in all respects.

[0325] Information, signals, etc. described in the present disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0326] In addition, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0327] The input and output information, signals, etc. may be stored in a specific location (e.g., a memory), or may be managed using a management table. The input and output information, signals, etc. may be overwritten, updated, or added. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0328] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0329] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (Layer 1 / Layer 2 (L1 / L2)) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as an RRC message, such as an RRC connection establishment (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC control element (MACControl Element (CE)).

[0330] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0331] The determination may be made using a value represented by one bit (0 or 1), a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(eg, comparison with a specific value).

[0332] Whether software is called software, firmware, middle-ware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software module, application, software application, software package, routine, sub-routine, object, executable files, execution thread, procedure, function, etc.

[0333] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when the software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0334] The terms "system" and "network" used in the present disclosure can be used interchangeably. "Network" may also refer to a device (eg, a base station) included in the network.

[0335] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "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", and "panel" can be used interchangeably.

[0336] In the present disclosure, terms such as "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)")", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, micro cell, and pico cell.

[0337] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within the coverage area.

[0338] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0339] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client or several other appropriate terms.

[0340] At least one of the base station and the mobile station may also be referred to as a transmission device, a reception device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may be a device mounted on a moving object, a moving object body, etc.

[0341] The mobile body refers to a movable object, and the moving speed is arbitrary, and of course it also includes the situation where the mobile body stops. The mobile body includes, for example, vehicles, transport vehicles, cars, automatic two-wheeled vehicles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, trailers, rickshaws, ships (ships and other watercrafts), airplanes, rockets, artificial satellites, drones, multi-rotor aircraft, quadcopters, balloons, and objects carried on them, but is not limited to these. In addition, the mobile body can also be a mobile body that moves autonomously based on operating instructions.

[0342] The mobile object may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile object that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station may include a device that does not necessarily move when performing communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0343] 11 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0344] The driving unit 41 is composed of at least one of an engine, a motor, and a hybrid power of an engine and a motor. The steering unit 42 is composed of at least a steering wheel (also called a steering wheel), and performs steering of at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.

[0345] The electronic control unit 49 is composed of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals from various sensors 50-58 provided in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be referred to as an ECU (Electronic Control Unit).

[0346] The signals from the various sensors 50-58 include a current signal from a current sensor 50 for sensing the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58, and the like.

[0347] The information service unit 59 is composed of various devices such as a car navigation system, an audio system, a speaker, a display, a television, and a radio for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information obtained from an external device via the communication module 60, etc. to provide various information / services (for example, multimedia information / multimedia services) to the occupants of the vehicle 40.

[0348] The information service unit 59 may include input devices for accepting input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.), and may also include output devices for implementing output to the outside (e.g., display, speaker, LED light, touch panel, etc.).

[0349] The driving assistance system unit 64 is composed of various devices for providing functions for preventing accidents or reducing the driving load of the driver, such as millimeter wave radar, light detection and ranging (LiDAR), camera, positioning device (for example, Global Navigation Satellite System (GNSS)), map information (for example, high-precision (High Definition (HD)) map, autonomous vehicle (Autonomous Vehicle (AV)) map, etc.), gyroscope system (for example, inertial measurement unit (Inertial Measurement Unit (IMU))), inertial navigation unit (Inertial Navigation System (INS))), artificial intelligence (Artificial Intelligence (AI)) chip, AI processor, and one or more ECUs that control these devices. In addition, the driving assistance system unit 64 sends and receives various information via the communication module 60 and realizes the driving assistance function or the autonomous driving function.

[0350] The communication module 60 can communicate with the microprocessor 61 and the components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) between the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the microprocessor 61 and the memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58 provided in the vehicle 40 via the communication port 63.

[0351] The communication module 60 can be controlled by the microprocessor 61 of the electronic control unit 49, and is a communication device that can communicate with an external device. For example, various information is sent and received with the external device via wireless communication. The communication module 60 can be located either inside or outside the electronic control unit 49. The external device can also be, for example, the above-mentioned base station 10, user terminal 20, etc. In addition, the communication module 60 can also be, for example, the above-mentioned base station 10, user terminal 20, etc. (it can also function as the base station 10, user terminal 20, etc.).

[0352] The communication module 60 may also transmit at least one of the signals from the various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may also be referred to as an input unit that receives input. For example, the PUSCH transmitted through the communication module 60 may also include information based on the above input.

[0353] The communication module 60 receives various information (traffic information, signal information, vehicle-to-vehicle information, etc.) transmitted from an external device, and displays it to the information service unit 59 provided in the vehicle. The information service unit 59 may also be referred to as an output unit for outputting information (for example, outputting information to a display, a speaker, etc. based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0354] In addition, the communication module 60 stores various information received from the external device in the memory 62 that can be used by the microprocessor 61. The microprocessor 61 can also control the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the various sensors 50-58, etc., which are provided in the vehicle 40 based on the information stored in the memory 62.

[0355] In addition, the base station in the present disclosure may also be rewritten as a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be rewritten as terms corresponding to inter-terminal communication (for example, "side link"). For example, uplink channels, downlink channels, etc. may also be rewritten as side link channels.

[0356] Likewise, the user terminal in the present disclosure may be rewritten as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0357] In the present disclosure, operations are assumed to be performed by a base station, and sometimes by its upper node depending on the situation. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by a base station, one or more network nodes other than the base station (for example, Mobility Management Entity (MME)), Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0358] The various methods / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, timings, flow charts, etc. of the various methods / implementations described in this disclosure may be swapped in order as long as they are not contradictory. For example, for the methods described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0359] The various modes / implementations described in the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems expanded, modified, created or specified based on them. In addition, multiple systems can also be applied in combination (for example, LTE or LTE-A, combination with 5G, etc.).

[0360] The phrase “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0361] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to the first and second elements does not mean that only two elements can be used or that the first element must take precedence over the second element in some form.

[0362] The term "determining" used in this disclosure may include a variety of operations. For example, "determining" may also refer to situations where judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database or other data structure), ascertaining, etc. are regarded as performing "determining".

[0363] In addition, “judgment (decision)” may also refer to situations where receiving (e.g., receiving information), transmitting (e.g., sending information), input (input), output (output), accessing (e.g., accessing data in a memory), etc. are regarded as making a “judgment (decision)”.

[0364] In addition, "judgment (decision)" can also be regarded as a situation where resolving, selecting, choosing, establishing, comparing, etc. are regarded as "judgment (decision)". That is, "judgment (decision)" can also be regarded as a situation where some actions are regarded as "judgment (decision)".

[0365] In addition, "judge (decide)" can also be rewritten as "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0366] The “maximum transmit power” described in the present disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated UE maximum transmit power.

[0367] The terms "connected", "coupled", or all their variations used in this disclosure refer to all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may also be rewritten as "access".

[0368] In the present disclosure, when two elements are connected, it is possible to consider being "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0369] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same manner as "different".

[0370] When the terms “include,” “including,” and variations thereof are used in the present disclosure, these terms have an inclusive meaning, similar to the term “comprising.” Furthermore, the term “or” used in the present disclosure does not have an exclusive OR meaning.

[0371] In the present disclosure, when an article is added by translation like a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0372] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal, which is a terminal supporting full-duplex communication, having: a receiving unit that receives information related to either a timing reference of uplink transmission or a timing reference of downlink reception; and The control unit controls the uplink transmission and the downlink reception by aligning a timing reference of the uplink transmission and a timing reference of the downlink reception based on the information.

2. The terminal according to claim 1, wherein: The control unit determines whether to make a timing reference of the downlink reception coincide with a timing reference of the uplink transmission.

3. The terminal according to claim 1, wherein: The control unit determines whether to make a timing reference of the uplink transmission coincide with a timing reference of the downlink reception.

4. The terminal according to claim 1, wherein: The receiving unit receives the information related to the timing for full-duplex communication and the information related to the timing for half-duplex communication.

5. A wireless communication method, which is a wireless communication method of a terminal supporting full-duplex communication, comprising: receiving information related to either a reference of uplink transmission timing or a reference of downlink reception timing; and A step of controlling the uplink transmission and the downlink reception by aligning a timing reference of the uplink transmission and a timing reference of the downlink reception based on the information.

6. A base station, which is a base station supporting full-duplex communication, having: a transmitting unit configured to transmit information related to either a reference of a timing of uplink transmission in a terminal or a reference of a timing of downlink reception in the terminal; and The control unit uses the information to instruct the terminal to: instruct the terminal to make the timing reference of the uplink transmission and the timing reference of the downlink reception consistent; and instruct the uplink transmission and the downlink reception.

Images