Terminal, wireless communication method, base station and system

Abstract

The present invention appropriately controls one or more UL transmissions in which priority setting is supported. A terminal according to an embodiment of the present disclosure is provided with a reception unit for receiving information pertaining to simultaneous transmission of UL transmissions, and a control unit which, when a plurality of UL transmissions having different priorities overlap in time domain, controls a transmission process for the plurality of UL transmissions on the basis of the information pertaining to the simultaneous transmission.

Description

[Technical field]

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

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

[0003] Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), New Radio (NR), 3GPP Rel. 15 or later) are also being considered. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention [Problem to be solved by the invention]

[0005] In future wireless communication systems (e.g., 5G, NR, etc.), it is expected that there will be a mixture of multiple services (also referred to as use cases, communication types, etc.) with different communication requirements, such as high speed and large capacity (e.g., enhanced Mobile Broadband (eMBB)), a massive number of terminals (e.g., massive Machine Type Communication (mMTC), Internet of Things (IoT)), and ultra-high reliability and low latency (e.g., Ultra Reliable and Low Latency Communications (URLLC)).

[0006] For example, in Rel.16 and later, it is being considered to set priorities for signals / channels and control communications based on the priorities set for each signal / channel. For example, when multiple signals / channels overlap, it is expected that transmission and reception will be controlled based on the priority of each signal / channel.

[0007] On the other hand, there may be cases where multiple UL transmissions transmitted on different carriers (or cells, CCs) overlap in the time domain and have different priorities. In this way, when multiple UL transmissions with different priorities are set / scheduled in the same time domain on different carriers, how to control the UL transmissions has not been fully considered.

[0008] Therefore, the present disclosure provides a terminal and a wireless communication method capable of appropriately controlling one or more UL transmissions in which priority setting is supported. 、 base station and systems One of the aims is to provide. [Means for solving the problem]

[0009] A terminal according to one embodiment of the present disclosure includes a transmitter that transmits terminal capability information regarding support for simultaneous transmission of multiple uplink (UL) transmissions having different priorities, a receiver that receives information regarding the simultaneous transmission of the multiple UL transmissions, and a controller that controls the simultaneous transmission of the multiple UL transmissions based on the information regarding the simultaneous transmission when the multiple UL transmissions overlap in a time domain. The information regarding the simultaneous transmission includes a plurality of upper layer parameters, and the control unit determines whether to perform simultaneous transmission of the plurality of UL transmissions based on whether a first upper layer parameter among the plurality of upper layer parameters is set to valid. The present invention is characterized by the above. Effect of the Invention

[0010] According to one aspect of the present disclosure, one or more UL transmissions for which priority settings are supported can be appropriately controlled. [Brief description of the drawings]

[0011] [Figure 1] 1A and 1B are diagrams illustrating an example of UL transmission control based on priority. [Diagram 2] FIG. 2 is a diagram illustrating another example of UL transmission control based on priority. [Diagram 3] FIG. 3 is a diagram illustrating an example of UL transmission control according to this embodiment. [Figure 4] FIG. 4 is a diagram showing another example of UL transmission control according to the present embodiment. [Diagram 5] FIG. 5 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 6] FIG. 6 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 7] FIG. 7 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 8] FIG. 8 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

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

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

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

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

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

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

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

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

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

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

[0023] Priority may be set for at least one of signals (e.g., UCI such as HARQ-ACK, reference signals, etc.), channels (PDSCH, PUSCH, PUCCH, etc.), reference signals (e.g., channel state information (CSI), sounding reference signal (SRS), etc.), scheduling request (SR), and HARQ-ACK codebook. Priority may also be set for the PUCCH used to transmit SR, the PUCCH used to transmit HARQ-ACK, and the PUCCH used to transmit CSI.

[0024] The priority may be defined as a first priority (e.g., high) and a second priority (e.g., low) that is lower than the first priority. Alternatively, three or more types of priority may be set.

[0025] For example, the priority may be set for the HARQ-ACK for the dynamically scheduled PDSCH, the HARQ-ACK for the semi-persistent PDSCH (SPS PDSCH), and the HARQ-ACK for the SPS PDSCH release. Alternatively, the priority may be set for the HARQ-ACK codebook corresponding to these HARQ-ACKs. When setting the priority for the PDSCH, the priority of the PDSCH may be read as the priority of the HARQ-ACK for the PDSCH.

[0026] Furthermore, priorities may be set for dynamic grant-based PUSCH, configuration grant-based PUSCH, and the like.

[0027] Information on priority may be notified from the base station to the UE using at least one of higher layer signaling and DCI. For example, the priority of a scheduling request may be set by a higher layer parameter (e.g., schedulingRequestPriority). The priority of HARQ-ACK for a PDSCH (e.g., dynamic PDSCH) scheduled by DCI may be notified by the DCI. The priority of HARQ-ACK for an SPS PDSCH may be set by a higher layer parameter (e.g., HARQ-ACK-Codebook-indicator-forSPS) or may be notified by a DCI instructing activation of the SPS PDSCH. A predetermined priority (e.g., low) may be set for P-CSI / SP-CSI transmitted by PUCCH. On the other hand, the priority of A-CSI / SP-CSI transmitted by PUSCH may be notified by DCI (e.g., DCI for trigger or DCI for activation).

[0028] The priority of the dynamic grant-based PUSCH may be notified by the DCI that schedules the PUSCH. The priority of the configuration grant-based PUSCH may be set by a higher layer parameter (e.g., priority). A predetermined priority (e.g., low) may be set for the P-SRS / SP-SRS and the A-SRS triggered by the DCI (e.g., DCI format 0_1 / DCI format 2_3).

[0029] (UL transmission overlap) The UE may control UL transmission based on priority when multiple UL signals / UL channels overlap (or collide).

[0030] The overlap of multiple UL signals / UL channels may refer to the case where time resources (or time resources and frequency resources) of multiple UL signals / UL channels overlap, or the case where transmission timings of multiple UL signals / UL channels overlap. The time resource may be read as the time domain. The time resource may be in units of a symbol, a slot, a subslot, or a subframe.

[0031] Overlapping UL signals / UL channels for the same UE (e.g., intra-UE) may mean overlapping UL signals / UL channels at least in the same time resource (e.g., symbol), and colliding UL signals / UL channels for different UEs (e.g., inter-UE) may mean overlapping UL signals / UL channels in the same time resource (e.g., symbol) and frequency resource (e.g., RB).

[0032] For example, when multiple UL signals / UL channels with the same priority overlap, the UE controls the multiple UL signals / UL channels to be multiplexed into one UL channel for transmission (see FIG. 1A).

[0033] 1A shows a case where a HARQ-ACK (or a PUCCH for transmitting a HARQ-ACK) to which a first priority (high) is set overlaps with a UL data / UL-SCH (or a PUSCH for transmitting a UL data / UL-SCH) to which a first priority (high) is set. In this case, the UE multiplexes (or maps) the HARQ-ACK onto the PUSCH to transmit both the UL data and the HARQ-ACK.

[0034] When multiple UL signals / UL channels with different priorities overlap, the UE may control the UL transmission with higher priority (e.g., prioritize the UL transmission with higher priority) and not to perform (e.g., drop) the UL transmission with lower priority (see FIG. 1B).

[0035] FIG. 1B shows a case where UL data / HARQ-ACK (or UL channel for transmitting UL data / HARQ-ACK) set to a first priority (high) overlaps with UL data / HARQ-ACK (or UL channel for transmitting UL data / HARQ-ACK) set to a second priority (low). In this case, the UE controls to drop the UL data / HARQ-ACK with a low priority and prioritize the transmission of the UL data / HARQ-ACK with a high priority. The UE may change (e.g., postpone or shift) the transmission timing of the UL transmission with a low priority.

[0036] When more than two (or more than two) UL signals / UL channels overlap in the time domain, the transmission may be controlled in two steps (see FIG. 2).

[0037] In step 1, one UL channel is selected for multiplexing UL signals transmitted by UL transmission with the same priority. In FIG. 2, an SR (or a PUCCH for SR transmission) having a first priority (high) and an HARQ-ACK (or a PUCCH for HARQ-ACK transmission) may be multiplexed onto a predetermined UL channel (here, a PUCCH for HARQ-ACK transmission). Similarly, an HARQ-ACK (or a PUCCH for HARQ-ACK transmission) having a second priority (low) and data (or a PUSCH for data / UL-SCH transmission) may be multiplexed onto a predetermined UL channel (here, a PUSCH).

[0038] In step 2, among UL transmissions with different priorities, control may be performed so that UL transmissions with higher priority are transmitted with priority and UL transmissions with lower priority are dropped. In Fig. 2, SRs having a first priority (high) and PUCCHs for HARQ-ACK transmission may be transmitted with priority, and HARQ-ACKs having a second priority (low) and PUSCHs for data transmission may be dropped.

[0039] In this way, the UE can resolve collisions between multiple UL transmissions with the same priority in step 1, and resolve collisions between multiple UL transmissions with different priorities in step 2.

[0040] However, there may be cases where multiple UL transmissions transmitted by different carriers (or cells, CCs) overlap in the time domain and have different priorities. In such cases, there has been no sufficient consideration on how to control multiple UL transmissions.

[0041] For example, when UL channels / UL signals are scheduled on different carriers of an inter-cell supported by different RFs (Radio Frequency), transmitting each UL channel / UL signal is useful from the viewpoint of low latency and spectrum efficiency. For example, when a UE supports RF processing for each of different carriers (CCs), transmitting a UL channel / UL signal on each carrier can improve resource utilization efficiency and reduce latency.

[0042] The inventors focused on the fact that there are cases where multiple UL transmissions with different priorities are set / scheduled in the same time region on different carriers (or cells, CCs), and studied the control of such multiple UL transmissions to come up with one aspect of the present embodiment.

[0043] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The configurations described in each embodiment may be applied alone or in combination.

[0044] In addition, in the present disclosure, “A / B” may be read as at least one of A and B, and “A / B / C” may be read as at least one of A, B, and C.

[0045] In the following description, the priority of UL transmission is described by taking two levels, a first priority (high) and a second priority (low), as an example, but the priority is not limited to two levels. Three or more levels of priority may be set.

[0046] In the present disclosure, UL transmission, UL channel, and UL signal may be interchangeable. Also, in the present disclosure, carrier, cell, CC, BWP, and band may be interchangeable. Also, in the present disclosure, "transmitted" may be interchangeable with scheduled, configured, or assigned.

[0047] (First aspect) In the first aspect, an example of UL transmission control in the case where multiple UL transmissions with different priorities overlap (or collide) in the time domain will be described.

[0048] The UE may control multiple UL transmissions based on information signaled from the network (e.g., base station) when multiple UL transmissions with different priorities are scheduled, configured, or assigned to the same time region. In the following description, the collision between PUSCH and PUCCH is taken as an example, but is not limited to this and can also be applied to collision of other UL channels / UL signals.

[0049] The base station may notify / configure information regarding simultaneous transmission of UL transmissions (or UL channels / UL signals) to the UE. The UE may control transmission processing (e.g., simultaneous transmission, dropping, etc.) for multiple UL transmissions that overlap in the time domain based on the information regarding simultaneous transmission notified / configured by the base station.

[0050] The information related to simultaneous transmission may be notified / configured from the base station to the UE by using at least one of higher layer signaling (e.g., RRC signaling, MAC signaling, etc.) and DCI. Below, the case where the information related to simultaneous transmission is notified / configured to the UE by using higher layer signaling (or higher layer parameters) (Option 1-1, Option 1-2) will be described.

[0051] <Option 1-1> Multiple higher layer parameters may be applied as information regarding the simultaneous transmission, in which case the UE may control the simultaneous transmission of multiple UL transmissions based on the multiple higher layer parameters.

[0052] The information regarding simultaneous transmission may include at least one of information indicating whether simultaneous UL transmission is set, information indicating the number of cells supporting simultaneous UL transmission, and information indicating cells supporting simultaneous UL transmission (e.g., cell index / CC index).

[0053] Information indicating whether simultaneous UL transmission is set may be notified using a first higher layer parameter (e.g., simultaneousULTX). Information indicating the number of cells supporting simultaneous UL transmission may be notified using a second higher layer parameter (e.g., nrofCCsimultaneousULTX). Information indicating cell indexes supporting simultaneous UL transmission may be notified using a third higher layer parameter (e.g., ccIndex).

[0054] The UE may determine at least one of the cell (eg, cell index / CC index) and the number of cells to which UL simultaneous transmission is to be applied, based on a plurality of higher layer parameters (eg, the notification contents of each higher layer parameter).

[0055] When the first higher layer parameter (e.g., simultaneousULTX={enable,disable} / {true,false}) is set to enable (enable or true), the UE may control to apply simultaneous transmission of multiple UL transmissions. On the other hand, when the first higher layer parameter (e.g., simultaneousULTX={enable,disable} / {true,false}) is set to enable (disable or false), the UE may control not to apply simultaneous transmission of multiple UL transmissions (e.g., drop UL transmissions with low priority).

[0056] When the first higher layer parameter is set to enabled, the UE may determine the number of cells supporting simultaneous transmission based on the second higher layer parameter (eg, nrofCCsimultaneousULTX={2,...,X}).

[0057] When the first higher layer parameter is set to enabled, the UE may determine cell indexes supporting simultaneous transmission based on a third higher layer parameter (e.g., ccIndex:BIT STRING(SIZE(Y))). The third higher layer parameter may indicate a combination of cells (or CCs) that allow simultaneous transmission, or may indicate cells for which simultaneous transmission is permitted.

[0058] Y (e.g., size) may correspond to the number of cells capable of simultaneous transmission (e.g., nrofCCsimultaneousULTX). The bit string (BIT STRING) may indicate the cells in which the UE can perform simultaneous UL transmission (e.g., PUSCH / PUCCH). For example, if Y=2 and the bit string is {1,1}, the UE may support simultaneous UL transmission in CC#1 and CC#2.

[0059] The UE may determine the cell supporting simultaneous transmission based on both the second upper layer parameter and the third upper layer parameter, or the UE may determine the cell supporting simultaneous transmission based on one of the second upper layer parameter and the third upper layer parameter.

[0060] When the UE determines cells that support simultaneous transmission using the second higher layer parameter (without using the third higher layer parameter), the UE may determine that simultaneous transmission is possible in all configured cells.

[0061] In addition, when the UE determines cells that support simultaneous transmission using the third higher layer parameter (without using the second higher layer parameter), the UE may determine that simultaneous transmission is possible for the total number (or Y) of cell combinations set in the third higher layer parameter.

[0062] For example, if the first upper layer parameter is set to enabled, the second upper layer parameter is 2 (e.g., nrofCCsimultaneousULTX=2), and the third upper layer parameter indicates CC#1 and CC#2 (ccIndex=(1,1)), the UE may apply simultaneous UL transmission in CC#1 and CC#2.

[0063] In this way, by notifying / setting information about simultaneous UL transmission from the base station to the UE, simultaneous transmission can be supported for a specific combination of UL transmissions even when multiple UL transmissions with different priorities overlap in the time domain, which reduces latency and suppresses deterioration of communication quality.

[0064] <Option 1-2> A predetermined (for example, one) upper layer parameter may be applied as information regarding simultaneous transmission, in which case the UE may control simultaneous transmission of multiple UL transmissions based on the one upper layer parameter.

[0065] A predetermined upper layer parameter (e.g., ccIndexSimultaneousULTX) may be configured to include information (e.g., cell index / CC index) regarding at least cells for which simultaneous transmission is permitted. The UE may be controlled to apply UL simultaneous transmission when the predetermined upper layer parameter is set. In such a case, the UE may determine a cell (or a combination of cells) for which simultaneous transmission is permitted based on the predetermined upper layer parameter.

[0066] When the predetermined upper layer parameter is set (or becomes valid), the UE may determine a cell index that supports simultaneous transmission based on the predetermined upper layer parameter (e.g., ccIndexSimultaneousULTX:BIT STRING(SIZE(Y))). The predetermined upper layer parameter may notify a combination of cells (or CCs) for which simultaneous transmission is possible, or may notify cells for which simultaneous transmission is permitted.

[0067] Y (e.g., size) may correspond to the number of cells for which simultaneous transmission is possible. The bit string (BIT STRING) may notify the cells in which the UE can perform UL transmission (e.g., PUSCH / PUCCH) simultaneously. For example, when Y = 2 and the bit string is {1,1}, the UE may support UL simultaneous transmission in CC#1 and CC#2.

[0068] In this way, by notifying / setting UL simultaneous transmission based on one upper layer parameter, an increase in overhead can be suppressed.

[0069] <UE Operation> The UE may control transmission processing (e.g., simultaneous transmission, dropping, etc.) for a plurality of UL transmissions that overlap in the time domain based on upper layer signaling notified / set from the base station.

[0070] [Case 1] Assume that simultaneous UL transmission is not set (for example, the first upper layer parameter in option 1-1 is disable or false, or a specified upper layer parameter in option 1-2 is not set).

[0071] In such a case, when multiple UL transmissions with different priorities overlap in the time domain, the UE may control to transmit only the first UL transmission with a first priority (e.g., high) and drop the second UL transmission with a second priority (e.g., low). For example, the UE may transmit the first UL transmission and drop the second UL transmission not only when the multiple UL transmissions are transmitted in the same cell but also when the multiple UL transmissions are transmitted in different cells (e.g., CC#1, CC#2) (see FIG. 3).

[0072] FIG3 shows a case where four UL transmissions overlap in the same time domain in multiple cells (CC#1 and CC#2). Specifically, two UL transmissions with the same priority (high in this case) overlap in CC#1, and two UL transmissions with the same priority (low in this case) overlap in CC#2. In this case, the UE may control the transmission in two steps.

[0073] In step 1, one UL channel is selected for multiplexing UL signals transmitted by UL transmission with the same priority. In FIG. 3, in CC#1, an SR (or a PUCCH for SR transmission) having a first priority (high) and an HARQ-ACK (or a PUCCH for HARQ-ACK transmission) may be multiplexed into a predetermined UL channel (here, a PUCCH for HARQ-ACK transmission). Similarly, in CC#2, an HARQ-ACK (or a PUCCH for HARQ-ACK transmission) having a second priority (low) and data (or a PUSCH for data / UL-SCH transmission) may be multiplexed into a predetermined UL channel (here, a PUSCH).

[0074] Note that, if there are no multiple UL transmissions with the same priority that collide in the time domain, the operation of step 1 may be omitted. Step 1 may be limited to multiple UL transmissions transmitted within the same cell, or may be applied to multiple UL transmissions transmitted in multiple cells, respectively.

[0075] In step 2, among UL transmissions with different priorities, a control may be performed so that a UL transmission with a higher priority is preferentially transmitted and a UL transmission with a lower priority is dropped. In Fig. 3, a PUCCH (CC#1) for SR+HARQ-ACK transmission having a first priority (high) may be preferentially transmitted, and a PUSCH (CC#2) for HARQ-ACK+data transmission having a second priority (low) may be dropped.

[0076] This allows UL transmission having the first priority (high) to be transmitted with priority, and simplifies the transmission process of the UE.

[0077] [Case 2] Assume that simultaneous UL transmission is configured (for example, when the first upper layer parameter in option 1-1 is enable or true, or when a predetermined upper layer parameter in option 1-2 is configured).

[0078] For example, assume that simultaneous UL transmission in CC#1 and CC#2 is supported, and a first UL transmission having a first priority (e.g., high) transmitted in CC#1 collides with a second UL transmission having a second priority (e.g., low) transmitted in CC#2. In this case, the UE may control to transmit both the first UL transmission having the first priority (e.g., high) and the second UL transmission having the second priority (e.g., low) (see FIG. 4).

[0079] FIG4 shows a case where four UL transmissions overlap in the same time domain in multiple cells (CC#1 and CC#2). Specifically, two UL transmissions with the same priority (high in this case) overlap in CC#1, and two UL transmissions with the same priority (low in this case) overlap in CC#2. In this case, the UE may control transmission in two steps.

[0080] In step 1, one UL channel is selected to multiplex UL signals transmitted by the same priority UL transmission. In Fig. 4, in CC#1, a case is shown in which an SR having a first priority (high) is multiplexed onto a PUCCH for HARQ-ACK transmission. Similarly, in CC#2, a case is shown in which an HARQ-ACK having a second priority (low) is multiplexed onto a PUSCH for data / UL-SCH transmission.

[0081] In addition, when multiple UL transmissions having the same priority do not collide in the time domain, the operation of step 1 may be omitted. Step 1 may be limited to multiple UL transmissions transmitted within the same cell, or may be applied to multiple UL transmissions transmitted in multiple cells. For example, step 1 may also be applied when UL transmissions having a first priority are transmitted in CC#1 and CC#2, respectively, and UL transmissions having a second priority are transmitted in CC#1 and CC#2, respectively.

[0082] In step 2, UL transmissions that overlap in the time domain and have different priorities are transmitted in multiple cells that allow simultaneous transmission. In Fig. 4, the UE transmits a PUCCH (CC#1) for SR+HARQ-ACK transmission with a first priority (high) and a PUSCH (CC#2) for HARQ-ACK+data transmission with a second priority (low).

[0083] This allows not only high-priority UL transmissions but also low-priority UL transmissions to be transmitted, thereby achieving reduced delay.

[0084] (Second aspect) In the second aspect, UE capability information is described for the case where multiple UL transmissions with different priorities overlap (or collide) in the time domain.

[0085] In a wireless communication system that supports simultaneous transmission of multiple UL transmissions with different priorities (e.g., multiple UL transmissions that overlap (or collide) in the time domain), the UE may report UE capability information regarding support of simultaneous transmission. For example, the UE may be controlled to report at least one of the following options 2-1 and 2-2 as the UE capability information.

[0086] <Option 2-1> The UE may report capability information indicating whether or not the UE supports simultaneous UL transmission as the UE capability information regarding simultaneous transmission. The capability information may be reported for each UE, for each band, for each band combination, or for each cell.

[0087] For example, if the UE capability information regarding simultaneous transmission is reported for each band, the UE may control to support (or apply / activate) simultaneous transmission for the reported band. The band may be translated into a frequency range (e.g., FR_X (e.g., X=1, 2, 3, or 4)).

[0088] <Option 2-2> The UE may report capability information indicating cells (or CCs) that support simultaneous UL transmission as UE capability information related to simultaneous transmission. The capability information may be reported for each UE, each band, each band combination, or each cell.

[0089] The capability information indicating the cells supporting simultaneous UL transmission may be the number of cells for which the UE supports simultaneous UL transmission, e.g., the UE may report a value selected from a predefined candidate value / candidate range (e.g., {2,...,X}).

[0090] Alternatively, the capability information indicating the cell supporting UL simultaneous transmission may be the cell index (or CC index) that the UE supports for UL simultaneous transmission.

[0091] The capability information regarding simultaneous transmission reported by the UE and the information regarding simultaneous transmission notified by the base station may be combined. For example, the base station may control the notification / setting of upper layer parameters based on the capability information reported by the UE.

[0092] For example, when the UE reports X as the number of cells supporting UL simultaneous transmission, the base station may notify / set X to the UE as the information indicating the number of cells supporting UL simultaneous transmission (for example, the second upper layer parameter (nrofCCsimultaneousULTX)). Alternatively, the base station may determine the size of the third upper layer parameter or a predetermined upper layer parameter based on the value (for example, X) reported by the UE.

[0093] In this way, by reporting the UE capability information regarding simultaneous transmission to the base station, it becomes possible to flexibly control UL simultaneous transmission for each UE.

[0094] The above-described UL transmission may be selected from at least one of a dynamic grant-based PUSCH, a configured grant-based PUSCH, a PUCCH, a random access channel (PRACH), a PUSCH scheduled by a random access response (RAR), and a PUSCH to which repeated transmission is applied. A plurality of UL transmissions colliding in the time domain may be UL transmissions respectively selected from a dynamic grant-based PUSCH, a configured grant-based PUSCH, a PUCCH, a PRACH, a PUSCH scheduled by an RAR, and a PUSCH to which repeated transmission is applied.

[0095] <Variation> The setting (or support) of simultaneous UL transmission is not limited to a cell (or CC) unit, and may be set in other units. For example, simultaneous UL transmission may be set for each cell group / band.

[0096] Also, the types (or categories) of UL channels / UL signals for which simultaneous UL transmission is supported may be set, or simultaneous transmission may not be set (or not supported) for a particular UL channel / UL signal.

[0097] (Wireless communication system) A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of the present disclosure.

[0098] 5 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0099] Furthermore, the wireless communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0100] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN) and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN and the LTE (E-UTRA) base station (eNB) is the SN.

[0101] The wireless communication system 1 may support dual connectivity between multiple base stations in the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0102] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged in the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1. A user terminal 20 may be located in at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as a base station 10.

[0103] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0104] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

[0105] Furthermore, the user terminal 20 may perform communication in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0106] The multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0107] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0108] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0109] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.

[0110] The radio access scheme may be called a waveform. In the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0111] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as a downlink channel.

[0112] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0113] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0114] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information of at least one of the PDSCH and the PUSCH.

[0115] In addition, DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and DCI for scheduling PUSCH may be called UL grant, UL DCI, etc. In addition, PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

[0116] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or multiple search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0117] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in the present disclosure may be read as interchangeable terms.

[0118] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and a scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0119] In the present disclosure, a downlink, an uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning of the channels.

[0120] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0121] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) may be called an SS / PBCH block, an SS Block (SSB), or the like. In addition, the SS, SSB, and the like may also be called a reference signal.

[0122] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may be called a user equipment specific reference signal (UE-specific reference signal).

[0123] (base station) 6 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0124] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the base station 10 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0125] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0126] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission and reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0127] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0128] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0129] The transmitting / receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0130] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0131] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0132] The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0133] The transceiver 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0134] The transceiver unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna .

[0135] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna .

[0136] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0137] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0138] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data) for the user terminal 20, control plane data, etc.

[0139] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0140] The transceiver 120 may transmit information regarding simultaneous UL transmission.

[0141] When multiple UL transmissions with different priorities overlap in the time domain, the control unit 110 may control reception of multiple UL transmissions whose transmission is controlled based on information about simultaneous transmission.

[0142] (User terminal) 7 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230.

[0143] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0144] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0145] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission / reception unit 220.

[0146] The transmitting / receiving unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitting / receiving unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting / receiving circuit, and the like, which are described based on common understanding in the technical field related to the present disclosure.

[0147] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0148] The transmitting / receiving antenna 230 can be composed of an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

[0149] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0150] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0151] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0152] The transceiver 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit sequence to be transmitted, and output a baseband signal.

[0153] In addition, whether or not to apply the DFT process may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver 220 (transmission processor 2211) may perform the DFT process as the transmission process to transmit the channel using a DFT-s-OFDM waveform, and may not perform the DFT process as the transmission process if transform precoding is enabled for the channel.

[0154] The transceiver unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna 230.

[0155] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna 230.

[0156] The transceiver 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0157] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0158] In addition, the transmitting section and the receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0159] The transceiver 220 may receive information regarding simultaneous UL transmissions.

[0160] The transceiver 220 may transmit at least one of first capability information indicating whether simultaneous UL transmission is supported, second capability information indicating the number of cells supporting simultaneous UL transmission, and third capability information indicating a cell index supporting simultaneous UL transmission. The transceiver 220 may transmit at least one of the first capability information, the second capability information, and the third capability information for each band, each band combination, or each cell.

[0161] When multiple UL transmissions with different priorities overlap in the time domain, the control unit 210 may control the transmission process of the multiple UL transmissions based on information about the simultaneous transmission.

[0162] The information regarding simultaneous transmission may include at least one of information indicating whether simultaneous UL transmission is set, information indicating the number of cells supporting simultaneous UL transmission, and information indicating a cell index supporting simultaneous UL transmission.

[0163] The control unit 210 may control to report at least one of the first capability information, the second capability information, and the third capability information for each band, each band combination, or each cell. For example, the control unit 210 may control to report capability information (at least one of the first capability information, the second capability information, and the third capability information) corresponding to a specific band, a specific band combination, or a specific cell.

[0164] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically combined, or may be realized by using two or more devices that are physically or logically separated and directly or indirectly connected (for example, by wire, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

[0165] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission may be called a transmitting unit, a transmitter, and the like. In either case, as described above, the method of realization is not particularly limited.

[0166] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 8 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. The above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0167] In this disclosure, the terms "apparatus," "circuit," "device," "section," "unit," and the like can be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0168] For example, although only one processor 1001 is shown, there may be multiple processors. Also, the processes may be performed by one processor, or the processes may be performed by two or more processors simultaneously, sequentially, or in other manners. Also, the processor 1001 may be implemented by one or more chips.

[0169] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading a specific software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications via a communication device 1004, and controls at least one of reading and writing of data in the memory 1002 and the storage 1003.

[0170] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0171] Moreover, the processor 1001 reads out programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to the programs. As the programs, programs that cause a computer to execute at least a part of the operations described in the above-mentioned embodiments are used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks may be realized in a similar manner.

[0172] The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be called a register, a cache, a main memory (primary storage device), and the like. The memory 1002 can store a program (program code), a software module, and the like that is executable to implement a wireless communication method according to an embodiment of the present disclosure.

[0173] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0174] The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0175] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0176] In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0177] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0178] (Modification) In addition, the terms explained in this disclosure and the terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be read as mutually interchangeable. A signal may also be a message. A reference signal may also be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applied standard. A component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, etc.

[0179] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0180] Here, the numerology may be a communication parameter applied to at least one of the transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0181] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may also be a time unit based on numerology.

[0182] A slot may include multiple minislots. Each minislot may be composed of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may be composed of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0183] A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. A different name may be used for the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be read as interchangeable with each other.

[0184] For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0185] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0186] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI.

[0187] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0188] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, etc.

[0189] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0190] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0191] In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. Each of one TTI, one subframe, etc. may be composed of one or more resource blocks.

[0192] In addition, one or more RBs may be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0193] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0194] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a numerology on a carrier, where the common RBs may be identified by the index of the RBs relative to a common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0195] The BWP may include a UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0196] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell", "carrier", etc. in this disclosure may be replaced with "BWP".

[0197] The above-mentioned structures of radio frames, subframes, slots, minislots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

[0198] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0199] The names used for parameters and the like in this disclosure are not limiting in any way. Furthermore, the formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

[0200] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0201] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via multiple network nodes.

[0202] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0203] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0204] The physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. The MAC signaling may be notified, for example, by using a MAC Control Element (CE).

[0205] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0206] The determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented as true or false, or by comparing numerical values ​​(e.g., with a predetermined value).

[0207] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0208] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0209] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0210] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," and the like may be used interchangeably.

[0211] In this disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc.

[0212] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0213] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0214] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0215] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may include a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0216] Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may be read as a side channel.

[0217] Similarly, the user terminal in the present disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0218] In the present disclosure, an operation performed by a base station may be performed by its upper node in some cases. It is clear that in a network including one or more network nodes having base stations, various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0219] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect / embodiment described in this disclosure may be reordered unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0220] Each aspect / embodiment described in the present disclosure may be implemented using any of a wide variety of standards, including Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems using 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other appropriate wireless communication methods, next-generation systems that are based on these, etc. Also, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0221] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0222] Any reference to an element using a designation such as "first," "second," etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.

[0223] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, and the like.

[0224] A "determining" may also be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.

[0225] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. That is, "determination" may be considered to be "deciding" to perform some action.

[0226] Additionally, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc.

[0227] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, may mean the nominal UE maximum transmit power, or may mean the rated UE maximum transmit power.

[0228] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0229] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, and the like, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, and the like, as some non-limiting and non-exhaustive examples.

[0230] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0231] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0232] In this disclosure, where articles have been added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0233] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modified and altered forms without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the invention according to the present disclosure.

[0234] This application is based on Japanese Patent Application No. 2020-140224, filed on August 21, 2020, the contents of which are incorporated herein in their entirety.

Claims

1. a transmitter for transmitting terminal capability information regarding support for simultaneous transmission of multiple uplink (UL) transmissions with different priorities; a receiver for receiving information regarding the simultaneous transmission of the plurality of UL transmissions; and a control unit configured to control, when the plurality of UL transmissions overlap in a time domain, to perform simultaneous transmission of the plurality of UL transmissions based on information regarding the simultaneous transmission, A terminal characterized in that the information regarding simultaneous transmission includes multiple upper layer parameters, and the control unit determines whether to perform simultaneous transmission of the multiple UL transmissions based on whether a first upper layer parameter among the multiple upper layer parameters is set to valid.

2. The terminal according to claim 1 , wherein the capability information is reported for each band combination.

3. 2. The terminal of claim 1, wherein the plurality of UL transmissions are a Physical Uplink Control Channel (PUCCH) transmission and a Physical Uplink Shared Channel (PUSCH) transmission.

4. transmitting capability information of the terminal regarding support for simultaneous transmission of multiple uplink (UL) transmissions with different priorities; receiving information regarding the simultaneous transmission of the plurality of UL transmissions; The information regarding the simultaneous transmission includes a plurality of upper layer parameters, and determining whether to perform simultaneous transmission of the plurality of UL transmissions based on whether a first upper layer parameter among the plurality of upper layer parameters is set to valid; and when the multiple UL transmissions overlap in the time domain, controlling the multiple UL transmissions to be transmitted simultaneously based on information regarding the simultaneous transmission.

5. a receiver for receiving terminal capability information regarding support for simultaneous transmission of multiple uplink (UL) transmissions with different priorities; a transmitter for transmitting information regarding the simultaneous transmission of the plurality of UL transmissions; a control unit for controlling a reception process for the multiple UL transmissions that are simultaneously transmitted based on information about the simultaneous transmission when the multiple UL transmissions overlap in a time domain; A base station characterized in that the information regarding the simultaneous transmission includes multiple upper layer parameters, and the control unit determines whether to set a first upper layer parameter among the multiple upper layer parameters to valid based on whether or not to perform simultaneous transmission of the multiple UL transmissions.

6. A system having a terminal and a base station, The terminal includes a transmitter for transmitting terminal capability information regarding support for simultaneous transmission of multiple uplink (UL) transmissions with different priorities; a receiver for receiving information regarding the simultaneous transmission of the plurality of UL transmissions; and a control unit configured to control, when the plurality of UL transmissions overlap in a time domain, to perform simultaneous transmission of the plurality of UL transmissions based on information regarding the simultaneous transmission, The information regarding the simultaneous transmission includes a plurality of upper layer parameters, and the control unit determines whether to perform simultaneous transmission of the plurality of UL transmissions based on whether a first upper layer parameter among the plurality of upper layer parameters is set to valid; The base station includes a receiving unit for receiving the capability information; A transmitter for transmitting information related to the simultaneous transmission; a control unit for controlling a reception process for the multiple UL transmissions that are simultaneously transmitted based on information about the simultaneous transmission when the multiple UL transmissions overlap in the time domain; The control unit determines whether or not to set the first upper layer parameter to valid based on whether or not the multiple UL transmissions are to be transmitted simultaneously.

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