Terminal, wireless communication method, base station and system

Abstract

A terminal according to one aspect of the present disclosure comprises: a control unit which, when a plurality of first uplink channels that do not overlap in a time domain and a second uplink channel having a lower priority than the first uplink channels overlap, performs control such that uplink control information corresponding to the second uplink channel maps to at least one of the plurality of first uplink channels; and a transmission unit which transmits the uplink control information by using the first uplink channel.

Description

Terminal, wireless communication method and base station

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

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

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

[0004] 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

[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] 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, even if multiple UL transmissions with different priorities overlap in the time domain, it may be possible to allow the multiple UL transmissions depending on the communication environment / communication conditions / UE capabilities. However, how to control the UL transmissions in such cases has not been fully studied.

[0008] Therefore, one object of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately control one or more UL transmissions that support priority setting.

[0009] A terminal according to one aspect of the present disclosure is characterized in that it has a control unit that, when a plurality of first uplink channels that do not overlap in the time domain overlap with a second uplink channel that has a lower priority than the first uplink channels, controls mapping of uplink control information corresponding to the second uplink channel to at least one of the plurality of first uplink channels, and a transmission unit that transmits the uplink control information using the first uplink channel.

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

[0011] Figures 1A and 1B are diagrams showing an example of priority-based UL transmission control. Figure 2 is a diagram showing another example of priority-based UL transmission control. Figure 3 is a diagram showing an example of a case where multiple HARQ-ACK codebooks are transmitted in a given slot. Figure 4 is a diagram showing an example of a case where multiple HARQ-ACK codebooks overlap in the time domain. Figures 5A to 5D are diagrams showing an example of a case where a certain UL channel overlaps with multiple UL channels of different priorities. Figure 6 is a diagram showing an example of UL transmission control based on the rules of Rel. 16. Figure 7 is a diagram showing an example of UL transmission control in the first aspect. Figure 8 is a diagram showing another example of UL transmission control in the first aspect. Figure 9 is a diagram showing another example of UL transmission control in the first aspect. Figure 10 is a diagram showing an example of UL transmission control in the second aspect. Figure 11 is a diagram showing another example of UL transmission control in the second aspect. Figures 12A to 12C are diagrams showing an example of UL transmission control in the third aspect. 13A to 13C are diagrams showing another example of UL transmission control in the third aspect. FIG. 14 is a diagram showing an example of UL transmission control in the fourth aspect. FIG. 15 is a diagram showing another example of UL transmission control in the fourth aspect. FIG. 16 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 17 is a diagram showing an example of a configuration of a base station according to an embodiment. FIG. 18 is a diagram showing an example of a configuration of a user terminal according to an embodiment. FIG. 19 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment.

[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 delays and higher reliability than eMBB.

[0013] At the physical layer, traffic types may be identified based on at least one of the following: logical channels with different priorities, a Modulation and Coding Scheme (MCS) table (MCS index table), a Channel Quality Indication (CQI) table, a DCI format, a Radio Network Temporary Identifier (RNTI) used to scramble (mask) the Cyclic Redundancy Check (CRC) bits included (added) in the DCI (DCI format), a Radio Resource Control (RRC) parameter, a specific RNTI (e.g., RNTI for URLLC, MCS-C-RNTI, etc.), a search space, and a predetermined field in the DCI (e.g., a newly added field or reuse of an existing field).

[0014] Specifically, the traffic type of HARQ-ACK for the PDSCH may be determined based on at least one of the following: - An 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 or not to use MCS index table 3) - An RNTI used for CRC scrambling of 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 the SR's 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 used for triggering, or a DCI transmission parameter, etc. The configuration information, DCI type, etc. may indicate whether the traffic type of the CSI is eMBB or URLLC. The configuration information may also be an upper layer parameter.

[0017] Furthermore, the traffic type of the PUSCH may be determined based on at least one of the following: - An MCS index table used to determine at least one of the modulation order, target coding rate, and TBS of the PUSCH (for example, whether or not to use MCS index table 3) - An RNTI used for CRC scrambling of DCI used for scheduling the PUSCH (for example, 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 less than that of eMBB, or that the requirements of URLLC include reliability requirements.

[0020] For example, the user (U) plane delay requirement for eMBB may include a downlink U-plane delay of 4 ms and an uplink U-plane delay of 4 ms. Meanwhile, the U-plane delay requirement for URLLC may include a downlink U-plane delay of 0.5 ms and an uplink U-plane delay of 0.5 ms. Furthermore, the reliability requirement for URLLC 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] Furthermore, enhanced Ultra Reliable and Low Latency Communications (eURLLC) is being studied to improve the reliability of traffic, mainly for unicast data. Hereinafter, 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 referred to as 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 a signal (e.g., UCI such as HARQ-ACK, reference signal, etc.), a channel (PDSCH, PUSCH, PUCCH, etc.), a reference signal (e.g., channel state information (CSI), sounding reference signal (SRS), etc.), a scheduling request (SR), and a HARQ-ACK codebook. Priority may also be set for each of the PUCCH used to transmit an SR, the PUCCH used to transmit an 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, priorities may be set for the HARQ-ACK for a dynamically scheduled PDSCH, the HARQ-ACK for a semi-persistent PDSCH (SPS PDSCH), and the HARQ-ACK for SPS PDSCH release. Alternatively, priorities may be set for the HARQ-ACK codebooks corresponding to these HARQ-ACKs. When setting a priority for a PDSCH, the priority of the PDSCH may be read as the priority of the HARQ-ACK for the PDSCH.

[0026] In addition, priorities may be set for dynamic grant-based PUSCH, configuration grant-based PUSCH, etc.

[0027] Priority information 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 configured by a higher layer parameter (e.g., schedulingRequestPriority). The priority of a HARQ-ACK for a PDSCH (e.g., a dynamic PDSCH) scheduled by a DCI may be signaled by the DCI. The priority of a HARQ-ACK for an SPS PDSCH may be configured by a higher layer parameter (e.g., HARQ-ACK-Codebook-indicator-forSPS) or may be signaled by a DCI indicating activation of the SPS PDSCH. A predetermined priority (e.g., low) may be set for P-CSI / SP-CSI transmitted by the PUCCH. On the other hand, the priority of A-CSI / SP-CSI transmitted by the PUSCH may be signaled by a DCI (e.g., a trigger DCI or an activation DCI).

[0028] The priority of the dynamic grant-based PUSCH may be signaled in the DCI that schedules the PUSCH. The priority of the configured grant-based PUSCH may be configured 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 the time resources (or the time resources and the frequency resources) of multiple UL signals / UL channels overlap, or the case where the transmission timings of multiple UL signals / UL channels overlap. The time resource may be interpreted 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 at 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 at 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 the HARQ-ACK) to which the first priority (high) is set overlaps with an UL data / UL-SCH (or a PUSCH for transmitting the UL data / UL-SCH) to which the first priority (high) is set. In this case, the UE multiplexes (or maps) the HARQ-ACK onto the PUSCH and transmits 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 transmissions with higher priority (e.g., prioritize the UL transmissions with higher priority) and not perform (e.g., drop) the UL transmissions with lower priority (see Figure 1B).

[0035] FIG. 1B illustrates a case where UL data / HARQ-ACK (or a UL channel for transmitting UL data / HARQ-ACK) set to a first priority (high) overlaps with UL data / HARQ-ACK (or a UL channel for transmitting UL data / HARQ-ACK) set to a second priority (low). In this case, the UE drops the UL data / HARQ-ACK with a low priority and prioritizes 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] If more than two (or three or more) 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 to multiplex UL signals transmitted in UL transmissions with the same priority. In Fig. 2, an SR (or a PUCCH for SR transmission) having a first priority (high) and a HARQ-ACK (or a PUCCH for HARQ-ACK transmission) may be multiplexed onto a predetermined UL channel (here, the 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, the PUSCH).

[0038] In step 2, among UL transmissions with different priorities, control may be performed so that a higher priority UL transmission is transmitted with priority and a lower priority UL transmission is dropped. In Fig. 2, a PUCCH for transmitting an SR and HARQ-ACK with a first priority (high) may be transmitted with priority, and a PUSCH for transmitting an HARQ-ACK and data with a second priority (low) may be dropped.

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

[0040] (Multiple HARQ-ACK Codebooks) In Rel. 16 and later, configuring up to N HARQ-ACK codebooks in a given slot (e.g., one slot) may be permitted. N may be, for example, 2. For example, when N is 2, the UE may configure two codebooks for HARQ-ACK with different priorities (or codebooks corresponding to different priorities / different service types) in a given slot and feed back the codebooks.

[0041] The UE may control the generation of the HARQ-ACK codebook (e.g., generation of HARQ-ACK bits in the HARQ-ACK codebook) based on the value of a priority indication field (e.g., Priority Indicator field) included in the DCI corresponding to each PDSCH. Figure 3 shows an example of generating / feeding back two HARQ-ACK codebooks (here, CB#0 and CB#1) corresponding to different priorities in slot #n. CB#0 corresponds to the second priority (low) or eMBB, and CB#1 corresponds to the first priority (high) or URLLC.

[0042] 3, the DCI corresponding to the PDSCH transmitted in slot #n-5 indicates that the feedback timing of the HARQ-ACK is slot #n (K1=5) and that the priority is second (low). The DCI corresponding to the PDSCH transmitted in slot #n-3 indicates that the feedback timing of the HARQ-ACK is slot #n (K1=3) and that the priority is second (low).

[0043] In Figure 3, the DCI corresponding to the PDSCH transmitted in slot #n-2 (subslots #n-4, #n-5) notifies that the HARQ-ACK feedback timing is slot #n (subslot #n) (K1 = 5 subslots) and that the priority is first (high).

[0044] In this case, the UE may generate and feed back two HARQ-ACK codebooks (CB#0 and CB#1) in slot #n.

[0045] On the other hand, there may be a case where the UL resource for CB #0 (for example, PUCCH / PUSCH) and the UL resource for CB #1 overlap in the time domain (see FIG. 4). In such a case, it may be possible to control the transmission of HARQ-ACK based on the priority corresponding to the HARQ-ACK (or CB). Specifically, a CB with a high priority is transmitted, and a CB with a low priority is dropped.

[0046] In this way, when multiple UL transmissions overlap in the time domain, it is being considered to control the UE so that only the UL transmission (or UL channel / UL signal) with the highest priority is transmitted.

[0047] On the other hand, even if multiple UL transmissions with different priorities overlap in the time domain, it may be possible to allow the multiple UL transmissions depending on the communication environment / communication conditions / UE capabilities. Supporting the multiple UL transmissions is useful from the viewpoints of low latency and spectral efficiency.

[0048] The communication environment / communication conditions / UE capabilities may be the cells from which multiple UL transmissions are transmitted, and the transmission / reception processing capabilities supported by the UE (e.g., RF circuits provided in the UE). For example, multiple UL transmissions (e.g., simultaneous transmissions) may be supported when multiple UL transmissions with different priorities are scheduled within a cell (intra-cell) or between cells (inter-cell) supported by different RFs.

[0049] However, if the transmission of multiple UL transmissions with different priorities is supported / allowed, the question arises how to control the UL transmissions.

[0050] For example, as shown in the following cases 1 to 4, it is also possible that a certain UL channel overlaps in the time domain with multiple UL channels having different priorities from the UL channel. Cases 1 to 4 may represent the state after step 1 in Fig. 2 (e.g., cases 1 to 3) or the state before step 1 (e.g., case 4).

[0051] <Case 1> Case 1 corresponds to a case where multiple UL channels HP#1, HP#2 corresponding to a first priority (e.g., high) overlap with a UL channel LP#3 corresponding to a second priority (e.g., low) lower than the first priority (see FIG. 5A ). It is assumed that the multiple UL channels HP#1, HP#2 of the first priority do not overlap in the time domain.

[0052] Case 2 corresponds to a case where an UL channel HP#2 corresponding to a first priority (e.g., high) overlaps with multiple UL channels LP#3 and LP#4 corresponding to a second priority (e.g., low) (see FIG. 5B ). It is assumed that the multiple UL channels LP#3 and LP#4 of the second priority do not overlap in the time domain.

[0053] <Case 3> Case 3 corresponds to a case where multiple UL channels HP#1 and HP#2 corresponding to a first priority (e.g., high) overlap with UL channel LP#3 corresponding to a second priority (e.g., low). Furthermore, it corresponds to a case where UL channel HP#2 corresponding to a first priority (e.g., high) overlaps with UL channel LP#4 corresponding to another second priority (e.g., low) (see FIG. 5C ). It is assumed that the multiple UL channels HP#1 and HP#2 of the first priority do not overlap in the time domain. It is also assumed that the multiple UL channels LP#3 and LP#4 of the second priority do not overlap in the time domain.

[0054] <Case 4> Case 4 corresponds to a case where multiple UL channels HP#1, HP#2 corresponding to a first priority (e.g., high) overlap with UL channel LP#3 corresponding to a second priority (e.g., low). Furthermore, it corresponds to a case where UL channel LP#3 corresponding to a second priority (e.g., high) overlaps with UL channel LP#4 corresponding to another second priority (e.g., low) (see FIG. 5D). It is assumed that the multiple UL channels HP#1, HP#2 of the first priority do not overlap in the time domain. It is also assumed that the multiple UL channels LP#4 of the other second priority do not overlap with the multiple UL channels HP#1, HP#2 of the first priority in the time domain. Note that Case 4 may also include a case where only one of UL channels HP#1 and HP#2 is set.

[0055] Rel. 16 supports transmission of multiple non-overlapping UL channels (e.g., PUCCH) of the same priority within a slot, where if UL channels of different priorities overlap, the lower priority UL channel (or the second priority UCI / UL data assigned to (or corresponding to) that UL channel) is dropped.

[0056] For example, in case 4 (FIG. 5D), when Rel. 16 collision handling is applied, first, in step 1, UCI #3 corresponding to UL channel LP #3 and UCI #4 corresponding to UL channel LP #4, which have the same priority, are multiplexed onto the other UL channel (see FIG. 6). Here, UCI #4 is multiplexed onto the second UL channel LP #3. Then, in step 2, UL channel LP #3 with the second priority (low) overlaps with UL channel HP #1 (or HP #2) with the first priority (high), so UL channel LP #3 is dropped. In this case, UL channel LP #4, which does not overlap with UL channels HP #1 and HP #2 with the first priority (high) in the previous step of step 1, is also dropped.

[0057] In Rel. 17 and later, it is assumed that transmission of UL transmissions with different priorities (e.g., UCI, data, etc.) is supported / allowed even when multiple UL transmissions with different priorities overlap in the time domain in Cases 1 to 4. However, how to control UL transmissions in such cases becomes an issue.

[0058] Alternatively, in Case 4, it may be possible to control so that a second-priority UL transmission (e.g., LP#4) that does not overlap with a first-priority UL transmission is not dropped before applying collision handling. However, how to control the UL transmission in such a case becomes a problem.

[0059] The inventors focused on the fact that there are cases where multiple UL channels that do not overlap in the time domain overlap with other UL channels with different priorities in the time domain, and studied UL transmission control in such cases, coming up with one aspect of this embodiment.

[0060] Alternatively, the inventors focused on a case (e.g., case 4) in which an UL channel (e.g., LP#1) having a higher priority than multiple UL channels (e.g., LP#3, LP#4) that overlap in the time domain overlaps with only one of the multiple UL channels, and studied UL transmission control in such a case to come up with one aspect of this embodiment.

[0061] 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 independently or in combination.

[0062] 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.

[0063] In the following description, two levels of priority for UL transmission, a first priority (high) and a second priority (low), are used as an example, but the priority is not limited to two levels. Three or more levels of priority may be set.

[0064] In this disclosure, the terms UL transmission, UL channel, and UL signal may be interchangeable. Also, in this disclosure, the terms carrier, cell, CC, BWP, and band may be interchangeable. Also, in this disclosure, "transmitted" may be interchangeable with scheduled, configured, or assigned.

[0065] In addition, in this disclosure, the time domain may be read as a time domain, a time resource, or a symbol. In addition, in this disclosure, the overlap may be read as a collision or duplication in the time direction. In addition, in this disclosure, the drop may be read as a puncture or a cancellation.

[0066] (First Aspect) In the first aspect, an example of UL transmission control in a case where a UL channel with a second priority (e.g., low) overlaps with multiple UL channels with a first priority (e.g., high) in the time domain (e.g., case 1) will be described. It is assumed that the multiple UL channels with the first priority do not overlap with each other in the time domain.

[0067] In the present disclosure, a first-priority UL channel may refer to an UL channel corresponding to a first-priority UCI or an UL channel utilized for allocation / mapping / transmission of a first-priority UCI. A first-priority UCI may be a UCI for which a first priority is set / designated / defined. A second-priority UL channel may refer to an UL channel corresponding to a second-priority UCI or an UL channel utilized for allocation / mapping / transmission of a second-priority UCI. A second-priority UCI may be a UCI for which a second priority is set / designated / defined.

[0068] In this embodiment, a case where the plurality of first UL channels and the second UL channel are each an uplink control channel (PUCCH) is taken as an example, but is not limited to this. At least one of the plurality of first UL channels may be another UL channel (e.g., PUSCH), the second UL channel may be another UL channel (e.g., PUSCH), or the plurality of first UL channels and the second UL channel may be another UL channel (e.g., PUSCH). Also, UCI may be read as UL data / UL-SCH.

[0069] In the following description, it is assumed that multiple first UL channels HP#1 and HP#2 of a first priority that do not overlap in the time domain overlap with a second UL channel HP#3 of a second priority (see FIG. 5A). FIG. 5A may illustrate a state after collision handling (e.g., step 1 in FIG. 2) when UL channels of the same priority overlap. Also, UCI#1 may correspond to (or be assigned to) the first UL channel HP#1, UCI#2 may correspond to the first UL channel HP#2, and UCI#3 may correspond to the second UL channel LP#3.

[0070] If certain conditions are met, the UE may multiplex / map a second UCI corresponding to a second UL channel to a first UCI (or a first UL channel) using at least one of the following options 1-1 to 1-3.

[0071] In this embodiment, the predetermined condition may be a timeline required for at least one of the first UCI / first UL channel and the second UCI / second UL channel. The predetermined condition may be a maximum coding rate of a multiplexed UL channel resource (e.g., the first UL channel resource onto which the second UCI is multiplexed). If the predetermined condition is not met (e.g., if the predetermined timeline is not met / if the maximum coding rate exceeds a predetermined value), the UE may be controlled to drop the second UCI (or the second UL channel).

[0072] <Option 1-1> The UE may control mapping of the second UCI corresponding to the second UL channel to a specific UL channel (e.g., one UL channel) among the plurality of first UL channels. The specific UL channel may be determined based on the transmission timing of the first UL channel. For example, the specific UL channel may be determined based on the first UL channel / UCI (e.g., the first UL channel / UCI) that is transmitted first in the time domain among the plurality of first UL channels / UCI. st PUCCH / 1 st UCI) (see FIG. 7).

[0073] The UE multiplexes / maps the first UCI #1 corresponding to the first UL channel #1 and the second UCI #3 corresponding to the second UL channel #3 onto the first UL channel HP #1. The UE may control the second UL channel #3 so as not to transmit (e.g., drop) the second UL channel #3. The resources of the first UL channel HP #1 onto which the second UCI #3 is multiplexed / mapped may remain unchanged regardless of the multiplexing of the second UCI #3, or may be changed due to the multiplexing of the second UCI #3.

[0074] By transmitting the second UCI #3 using the first UL channel HP #1, which is transmitted first in the time domain, it is possible to suppress delay of the second UCI #3. Furthermore, since the second UCI #3 is not mapped to the second or subsequent first UL channel HP #2 / UCI #2 in the time domain, it is possible to suppress influence on the transmission of the second or subsequent first UL channel / UCI.

[0075] The second UCI #3 mapped to the first UL channel #1 may be partially dropped or may be subjected to bundling. For example, the UE may control how the second UCI #3 is mapped to the first UL channel #1 based on the size / capacity of the first UL channel #1.

[0076] In addition, Figure 7 shows a case where the second UCI #3 is mapped to the first UL channel HP #1 / UCI #1, which is transmitted first in the time domain, but it is also possible to configure the second UCI #3 to be mapped to the first UL channel HP #2 / UCI #2, which is transmitted last in the time domain.

[0077] <Option 1-2> A specific UL channel to which the second UCI corresponding to the second UL channel is mapped may be determined based on the size / capacity or the number of transmittable bits / bit size / payload capacity of the first UL channel. For example, the specific UL channel may be the first UL channel / UCI that can transmit more bits (see FIG. 8).

[0078] The UE selects a first UL channel / UCI capable of transmitting more bits from among multiple first UL channels, and multiplexes / maps the second UCI onto the selected first UL channel / UCI. Figure 8 illustrates a case where the second UCI #3 corresponding to the second UL channel #3 is mapped onto the first UL channel HP #2, which has a larger size / capacity. The second UL channel LP #3 may be controlled not to be transmitted (e.g., dropped). The resources of the first UL channel HP #2 onto which the second UCI #3 is multiplexed / mapped may remain unchanged regardless of the multiplexing of the second UCI #3, or may be changed due to the multiplexing of the second UCI #3.

[0079] By transmitting the second UCI using the first UL channel having a large size / capacity, it is possible to appropriately transmit the first UCI and the second UCI even when they are transmitted on the same UL channel. Furthermore, since the second UCI is not mapped to the first UL channel / UCI having a small size / capacity, it is possible to suppress the influence on the transmission of the first UL channel / UCI having a small size / capacity.

[0080] The second UCI #3 mapped to the first UL channel HP #1 may be partially dropped or may be subjected to bundling. For example, the UE may control how the second UCI #3 is mapped to the first UL channel HP #1 based on the size / capacity of the first UL channel HP #1.

[0081] <Option 1-3> The UE may control mapping of a second UCI corresponding to a second UL channel to multiple first UL channels / UCIs. The second UCI may be split and multiplexed / mapped to multiple first UL channels / UCIs (see FIG. 9).

[0082] FIG. 9 shows a case where the UE divides the second UCI #3, multiplexes / maps the first part onto the first UL channel HP #1 (or the first UCI #1), and then multiplexes / maps the second part onto the second UL channel HP #2 (or the first UCI #2).

[0083] The splitting method of the second UCI may be predefined in a specification (e.g., split into a specific ratio such as half-half), may be notified to the UE by the base station, or may be determined based on a predetermined parameter (e.g., UCI type).

[0084] The second UCI #3 mapped to each of the first UL channels HP #1 and HP #2 may be partially dropped or subjected to bundling. For example, the UE may control how the second UCI #3 is mapped to the first UL channels HP #1 and HP #2 based on the size / capacity of the first UL channels HP #1 and HP #2. The process of dropping a portion of the second UCI #3 / the process of bundling the second UCI #3 may be performed either before or after splitting the second UCI #3.

[0085] By dividing the second UCI into a plurality of parts and distributing and multiplexing the parts into a plurality of first UL channels / UCIs, it is possible to suppress the influence on the first UL channels / UCIs.

[0086] 9 illustrates a case where the second UCI is divided and the divided second UCI is mapped to a plurality of first UL channels / first UCIs, but this is not limiting. For example, the second UCI may be configured to be mapped to a plurality of first UL channels / first UCIs without being divided.

[0087] (Second Aspect) In the second aspect, an example of UL transmission control in a case where a UL channel with a first priority (e.g., high) overlaps with multiple UL channels with a second priority (e.g., low) in the time domain (e.g., case 2) will be described. It is assumed that the multiple UL channels with the second priority do not overlap with each other in the time domain.

[0088] In the following description, it is assumed that multiple second UL channels LP#3 and LP#4 of second priority that do not overlap in the time domain overlap with the first UL channel HP#2 of first priority (see FIG. 5B ), which may illustrate a state after collision handling (e.g., step 1 in FIG. 2 ) when the same priority overlaps.

[0089] If certain conditions are met, the UE may use at least one of the following options 2-1 to 2-2 to multiplex / map at least one of multiple second UCIs #3 and #4 corresponding to second UL channels LP #3 and LP #4, respectively, onto the first UCI #2 (or the first UL channel HP #2).

[0090] <Option 2-1> The UE may control to combine second UCIs corresponding to multiple second UL channels and multiplex / map the combined second UCIs onto the first UL channel #1 (or the first UCI). For example, the UE may first combine second UCI #3 corresponding to the second UL channel LP #3 with second UCI #4 corresponding to the second UL channel LP #4, and then multiplex / map the combined second UCI onto the first UL channel HP #2 (or the first UCI #2) (see FIG. 10).

[0091] When both (or at least one) of the second UL channels LP#3 and LP#4 overlap with the first UL channel HP#2 (or the first UCI#2), the UE may first apply combining (or multiplexing / mapping) of non-overlapping second UCIs (non-overlapping low priority UCIs).The UE may then multiplex / map the combined second UCIs with the first UCI.

[0092] The second UCI #3, #4 mapped to the first UL channel HP #2 may be partially dropped or may be subjected to bundling. For example, the UE may control the mapping method of the second UCI based on the size / capacity of the first UL channel HP #2. The process of partially dropping the second UCI / the process of bundling the second UCI may be performed either before or after combining the second UCI.

[0093] <Option 2-2> The UE may control to multiplex / map a specific second UCI (e.g., one second UCI) among the second UCIs #3 and #4 corresponding to the plurality of second UL channels LP #3 and LP #4, respectively, onto the first UL channel HP #2 (or the first UCI #2). In this case, the UE may control not to transmit (e.g., drop) any second UCI other than the specific second UCI.

[0094] The specific second UCI to be transmitted using the first UL channel (or the second UCI to be dropped) may be determined based on a predetermined condition / predetermined rule. The predetermined condition / predetermined rule may be defined in a specification, or may be set / notified from the base station to the UE by higher layer signaling, etc.

[0095] The predetermined condition / predetermined rule may be determined based on, for example, the type / content / category of the UCI. In this case, different priorities may be set among the UCIs corresponding to the second priority.

[0096] For example, UCI#A (e.g., HARQ-ACK / SR) corresponding to the second priority may be set to a higher priority than UCI#B (e.g., CSI) corresponding to the second priority. When UCI#A corresponds to the second UL channel LP#3 and UCI#B corresponds to the second UL channel LP#4, UCI#A (UCI#3) may be multiplexed / mapped to the first UL channel HP#2, and UCI#B (UCI#4) may be controlled not to be transmitted (e.g., dropped) (see FIG. 11 ).

[0097] This prevents an increase in the number of bits of the second UCI multiplexed / mapped onto the first UL channel, thereby enabling appropriate transmission of the first UL channel. Also, by controlling transmission of a specific UCI with a higher priority among a plurality of UCIs with the second priority, deterioration of communication quality can be prevented.

[0098] (Third Aspect) In the third aspect, an example of UL transmission control in a case where multiple UL channels of a first priority (e.g., high) overlap with UL channels of a second priority (e.g., low), and at least one of the multiple UL channels of the first priority overlaps with another UL channel of a second priority (e.g., case 3) will be described. Assume that the multiple UL channels of the first priority do not overlap with each other in the time domain, and the multiple UL channels of the second priority do not overlap with each other in the time domain.

[0099] In the following description, it is assumed that multiple UL channels HP#1 and HP#2 corresponding to a first priority (e.g., high) overlap with a UL channel LP#3 corresponding to a second priority (e.g., low) (see FIG. 5C ). It is further assumed that the UL channel HP#2 corresponding to a first priority (e.g., high) overlaps with a UL channel LP#4 corresponding to another second priority (e.g., low). It is also assumed that the multiple UL channels HP#1 and HP#2 of the first priority do not overlap in the time domain. It is also assumed that the multiple UL channels LP#3 and LP#4 of the second priority do not overlap in the time domain. FIG. 5C may also illustrate a state after collision handling (e.g., step 1 of FIG. 2 ) when the same priority overlaps.

[0100] If certain conditions are met, the UE may use at least one of the following options 3-1 to 3-7 to multiplex / map at least one of multiple second UCIs #3 and #4 corresponding to second UL channels LP #3 and LP #4, respectively, to at least one of the first UCIs #1 and #2 (or first UL channels HP #1 and HP #2).

[0101] <Option 3-1> The UE may combine second UCIs corresponding to the plurality of second UL channels, respectively, and control the combination to be mapped to a specific UL channel (e.g., one UL channel) among the plurality of first UL channels. The specific UL channel may be determined based on the transmission timing of the first UL channel. For example, the specific UL channel may be determined based on the first UL channel / UCI (e.g., the first UL channel / UCI) that is transmitted first in the time domain among the plurality of first UL channels / UCIs. st PUCCH / 1 st UCI).

[0102] The UE may first combine the second UCI #3 corresponding to the second UL channel LP #3 with the second UCI #4 corresponding to the second UL channel LP #4, and then multiplex / map the combined second UCI to the first UL channel HP #1 (or the first UCI #1) (see Figure 12A).

[0103] The combining of the plurality of second UCIs may be controlled in the same manner as in Option 2-1 of the second embodiment. Also, Option 1-1 of the first embodiment and Option 2-1 of the second embodiment may be applied in combination.

[0104] <Option 3-2> A specific UL channel to which the second UCIs corresponding to the plurality of second UL channels are mapped after being combined may be determined based on the size / capacity or the number of transmittable bits / bit size of the first UL channel. For example, the specific UL channel may be a first UL channel / UCI capable of transmitting more bits (see FIG. 12B ).

[0105] The UE may select a first UL channel / UCI capable of transmitting more bits from among the plurality of first UL channels, and multiplex / map the plurality of combined second UCIs onto the selected first UL channel / UCI. Figure 12B shows a case where second UCIs #3 and #4 corresponding to second UL channels LP #3 and LP #4, respectively, are mapped onto the first UL channel HP #2, which has a larger size / capacity. The second UL channels LP #3 and #4 may be controlled not to be transmitted (e.g., dropped).

[0106] By transmitting the second UCI using the first UL channel having a large size / capacity, transmission can be performed appropriately even when a plurality of combined second UCIs are transmitted using the first UL channel. Furthermore, since the second UCI is not mapped to the first UL channel / first UCI having a small size / capacity, it is possible to suppress an impact on the transmission of the first UL channel / first UCI having a small size / capacity.

[0107] The combining of the plurality of second UCIs may be controlled in the same manner as in Option 2-1 of the second embodiment. Also, Option 1-2 of the first embodiment and Option 2-1 of the second embodiment may be applied in combination.

[0108] <Option 3-3> After combining second UCIs corresponding to multiple second UL channels, the combined second UCIs may be split and multiplexed / mapped to multiple first UL channels / UCIs (see FIG. 12C).

[0109] Figure 12C shows a case in which the UE combines multiple second UCIs #3 and #4, then divides the combined second UCI, multiplexes / maps the first part onto the first UL channel HP #1 (or the first UCI #1), and then multiplexes / maps the second part onto the second UL channel HP #2 (or the first UCI #2).

[0110] Combining of multiple second UCIs may be controlled in the same manner as Option 2-1 of the second aspect. Splitting of the combined second UCIs may be controlled in the same manner as Options 1-3 of the first aspect. Also, Options 1-3 of the first aspect and Option 2-1 of the second aspect may be applied in combination.

[0111] <Option 3-4> The UE may control mapping of a specific second UCI (e.g., one second UCI) among the second UCIs corresponding to the multiple second UL channels to a specific UL channel (e.g., one UL channel) among the multiple first UL channels. In this case, the UE may control not to transmit (e.g., drop) any second UCI other than the specific second UCI.

[0112] The specific second UCI (or the second UCI to be dropped) may be determined based on a predetermined condition / predetermined rule. The predetermined condition / predetermined rule may be defined in a specification, or may be set / notified from the base station to the UE by higher layer signaling or the like. The predetermined condition / predetermined rule may be determined based on, for example, the type / content / category of the UCI. In this case, different priorities may be further set between UCIs corresponding to the second priority.

[0113] The specific UL channel may be determined based on the transmission timing of the first UL channel. For example, the specific UL channel may be determined based on the first UL channel / UCI (e.g., the first UL channel / UCI) that is transmitted first in the time domain among the plurality of first UL channels / UCIs. st PUCCH / 1 st UCI).

[0114] The UE may first select one of the second UCI #3 corresponding to the second UL channel LP #3 and the second UCI #4 corresponding to the second UL channel LP #4, and then multiplex / map the selected second UCI to the first UL channel HP #1 (or the first UCI #1) (see Figure 13A).

[0115] For example, the UE may apply a combination of the first aspect option 1-1 and the second aspect option 2-2.

[0116] <Option 3-5> A specific UL channel to which a specific second UCI is mapped may be determined based on the size / capacity of the first UL channel or the number of transmittable bits / bit size. For example, the specific UL channel may be the first UL channel / first UCI that can transmit more bits (see FIG. 13B).

[0117] The UE may select a first UL channel / UCI capable of transmitting more bits from among a plurality of first UL channels, and multiplex / map a specific second UCI to the selected first UL channel / UCI. Figure 13B shows a case where second UCI #3 corresponding to second UL channel LP #3 is mapped to first UL channel HP #2 having a larger size / capacity.

[0118] For example, the UE may apply a combination of the first aspect option 1-2 and the second aspect option 2-2.

[0119] By transmitting the second UCI using the first UL channel having a large size / capacity, transmission can be performed appropriately even when a plurality of combined second UCIs are transmitted using the first UL channel. Furthermore, since the second UCI is not mapped to the first UL channel / first UCI having a small size / capacity, it is possible to suppress an impact on the transmission of the first UL channel / first UCI having a small size / capacity.

[0120] <Option 3-6> A specific second UCI may be split and controlled to be multiplexed / mapped to multiple first UL channels / first UCIs (see FIG. 13C).

[0121] Figure 13C shows a case in which the UE selects one second UCI from multiple second UCIs #3 and #4, then divides the selected second UCI, multiplexes / maps the first part onto the first UL channel HP #1 (or the first UCI #1), and then multiplexes / maps the second part onto the second UL channel HP #2 (or the first UCI #2).

[0122] The splitting method of the second UCI may be controlled in the same manner as in Options 1-3 of the first aspect, or may be applied by combining Options 1-3 of the first aspect and Option 2-2 of the second aspect.

[0123] <Option 3-7> Second UCI corresponding to each of a plurality of second UL channels may be controlled to be multiplexed / mapped to different first UL channels, respectively.

[0124] For example, the UE may control the multiplexing / mapping of the second UCI #3 corresponding to the second UL channel #3 onto the first UL channel #1 (or the first UCI #1), and the multiplexing / mapping of the second UCI #4 corresponding to the second UL channel #4 onto the first UL channel #2 (or the first UCI #2).

[0125] This allows multiple pieces of second UCI to be multiplexed / mapped onto the first UL channel to be distributed, thereby enabling appropriate transmission of the first UL channel.

[0126] (Fourth Aspect) In the fourth aspect, an example of UL transmission control will be described in which a UL channel of a second priority (e.g., low) that overlaps in the time domain with a UL channel of a first priority (e.g., high) also overlaps with another UL channel of the second priority, where the UL channel of the first priority and the other UL channel of the second priority do not overlap in the time domain.

[0127] For example, the UE may perform collision handling for cases where the same priority conflicts (e.g., step 1 in FIG. 2) or collision handling for cases where first UL channels of first priority conflict in case 4 (see FIG. 5D), and then may control transmission of UCI#3 corresponding to a second UL channel LP#3 that overlaps with the first UL channel and UCI#4 corresponding to a second UL channel LP#4 that does not overlap with the first UL channel based on a predetermined rule.

[0128] The UE may control UL transmission using the following steps A1 to A3, where it is assumed that the second UL channels LP#3 and LP#4 overlap in the time domain.

[0129] Figure 14 shows a case where the first UL channels HP#0 and HP#1 of the first priority overlap, the second UL channel LP#3 of the second priority overlaps with the first UL channels HP#0 and HP#1, and the second UL channel LP#4 of the second priority does not overlap with the first UL channels HP#0 and HP#1 but overlaps with the second UL channel LP#3.

[0130] <Step 1> When UL channels / UCIs having first priority overlap, collision handling is performed between the UL channels / UCIs having first priority. In Figure 14, the UE controls the multiplexing / mapping of one of the first UL channel HP#0 / UCI#0 and the first UL channel HP#1 / UCI#1 onto the other. Here, the case where UCI#0 is multiplexed / mapped onto the first UL channel HP#1 / UCI#1 is shown.

[0131] Step 2: The second UL channels of the second priority may be grouped. For example, the second UL channels may be grouped into a first part (1 st part) and the second part (2 nd The first part may be referred to as a first group, a first PUCCH part, or a first part, and the second part may be referred to as a second group, a second PUCCH part, or a second part.

[0132] The grouping may be performed based on a predetermined rule. For example, the predetermined rule may be based on whether or not there is overlap with the first UL channel in the time domain. As an example, one or more second UL channels / UCIs that overlap with the first UL channel (UL channel HP#1 in FIG. 14) after step 1 are grouped into the first part (1 st In addition, one or more second UL channels / UCIs that do not overlap with the first UL channel (UL channel HP#1 in FIG. 14) after step 1 may be classified as a second part (2 nd It may also be classified as a "part."

[0133] When multiple second UL channels classified in the first part overlap in the time domain, collision handling may be performed among the multiple second UL channels / UCIs. For example, a specific UL channel may be selected from the multiple second UL channels. In this case, control may be performed to multiplex / map the second priority UCI included in the first part onto the specific UL channel.

[0134] When multiple second UL channels classified in the second part overlap in the time domain, collision handling may be performed among the multiple second UL channels / UCIs. For example, a specific UL channel may be selected from the multiple second UL channels. In this case, control may be performed to multiplex / map the second priority UCI included in the second part onto the specific UL channel.

[0135] FIG. 14 shows a case where the second UL channel #3 is included in the first part / first group, and the second UL channel #4 is included in the second part / second group.

[0136] <Step 3> After step 2, among a second UL channel / UCI (e.g., a first group) that overlaps with the first UL channel / UCI and a second UL channel / UCI (e.g., a second group) that does not overlap with the first UL channel / UCI, at least the UCI of the first group may be controlled to be multiplexed / mapped onto the first UL channel / UCI.

[0137] For example, assume that after step 2, there exists a second UL channel / UCI (second UL channel LP#3 in FIG. 14) that overlaps with a first UL channel / UCI (first UL channel HP#1 in FIG. 14) and another second UL channel / UCI (second UL channel LP#4 in FIG. 14) that overlaps with the second UL channel / UCI.

[0138] If the number of first UL channels (e.g., the first UL channels overlapping with the second UL channel LP#3) after step 1 is 1, the UE may control the second UL channels / UCI of the first group to be multiplexed / mapped to the first UL channel, and in this case, the second UL channel LP#3 may be dropped.

[0139] If the number of first UL channels (e.g., first UL channels overlapping with second UL channel #3) after step 1 is greater than one or equal to or greater than one, the UE may control the second UL channel #LP3 / UCI of the first group to be multiplexed / mapped to multiple first UL channels. Alternatively, the UE may directly transmit the second UL channel LP#4 / UCI of the second group that does not overlap with the first UL channel, or may control the second UL channel LP#4 / UCI to be multiplexed / mapped to multiple first UL channels (see FIG. 15). In this case, at least one of Options 3-1 to 3-7 in the third aspect may be used.

[0140] (UE Capability Information) The UE may report UE capability information indicating whether it supports multiplexing / mapping UCI corresponding to a second-priority UL channel onto a first UL channel when the first-priority UL channel and the second-priority UL channel overlap in the time domain.

[0141] The UE may also report UE capability information indicating whether it supports multiplexing / mapping of second-priority UCIs onto first-priority UL channels / UCIs when one or more (e.g., two) second-priority UL channels / UCIs collide with one or more first-priority UL channels / UCIs.

[0142] When multiplexing / mapping UL channels / UCIs of different priorities, the UE may report UE capability information indicating whether it supports bundling / dropping for UCIs (e.g., UCIs of second priority).

[0143] Before performing collision handling (or collision resolution) between channels with the same priority, if the UL channel of the second priority does not overlap with the UL channel of the first priority (e.g., case 4), the UE may report UE capability information indicating whether or not it supports the new multiplexing / prioritization of the first to fourth aspects. If the UE does not support the UE capability, the UL channel / UCI of the second priority may be dropped as in the existing system, even if the multiplexing of the UL channels of the second priority due to collision handling results in a collision with the first UL channel.

[0144] The UE may report UE capability information indicating whether it supports rules / operations for collision handling (or collision resolution) for multiple parts (e.g., two parts) of UL channels / UCIs of the same priority (e.g., step 2 / step 3 of the fourth aspect). For example, in Figures 14 and 15, the UE may report whether it supports multiplexing / mapping of a second UL channel LP#3 that overlaps with a first priority UL channel and a second UL channel LP#4 that does not overlap with the first priority UL channel onto the first UL channel. If the UE does not support the UE capability information, the second UL channels #3 and #4 may be aggregated into one second UL channel and then multiplexed / mapped onto the first UL channel.

[0145] The base station may notify / configure the UE capability information (e.g., whether or not a predetermined operation is supported) to the UE using higher layer signaling. The base station may control whether or not to configure the predetermined operation based on the UE capability information reported from the UE, or may control whether or not to configure the predetermined operation without considering the UE capability information.

[0146] (Wireless Communication System) The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination thereof.

[0147] 16 is a diagram illustrating 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) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP).

[0148] The wireless communication system 1 may also support dual connectivity between multiple 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)), etc.

[0149] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (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.

[0150] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0151] 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 located within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A user terminal 20 may be located within at least one of the cells. The locations and numbers of the cells and user terminals 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 base station 10.

[0152] 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 (CCs) and dual connectivity (DC).

[0153] 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 higher than 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.

[0154] 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.

[0155] The multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), an 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.

[0156] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0157] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0158] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the wireless communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0159] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (e.g., other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0160] 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 the downlink channel.

[0161] Furthermore, 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)), or the like may be used as an uplink channel.

[0162] 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).

[0163] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information for at least one of the PDSCH and the PUSCH.

[0164] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as a UL grant, a UL DCI, etc. Note that the PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data.

[0165] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources for searching 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 more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

[0166] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," "CORESET configuration," and the like in the present disclosure may be read interchangeably.

[0167] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0168] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

[0169] 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.

[0170] 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 an SS (PSS, SSS) and a PBCH (and a DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as a reference signal.

[0171] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), or the like may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0172] (Base Station) Fig. 17 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.

[0173] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0174] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured from 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.

[0175] 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 transceiver unit 120, the transceiver 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 transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0176] 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.

[0177] 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, the RF unit 122, and a measurement unit 123.

[0178] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0179] 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.

[0180] The transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0181] The transmitter / receiver unit 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.

[0182] The transmitter / receiver unit 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.

[0183] The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

[0184] 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 band signal received by the transceiver antenna 130.

[0185] 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.

[0186] 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.

[0187] 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), control plane data, etc. for the user terminal 20.

[0188] 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.

[0189] When a plurality of first uplink channels that do not overlap in the time domain overlap with a second uplink channel, the transceiver unit 120 may receive a first uplink channel to which uplink control information corresponding to the second uplink channel is mapped.

[0190] When a first uplink channel overlaps with a plurality of second uplink channels that do not overlap in the time domain, the transceiver unit 120 may receive a first uplink channel to which at least one of the uplink control information corresponding to each of the plurality of second uplink channels is mapped.

[0191] The control unit 110 may control the allocation of a first uplink channel and a second uplink channel having a lower priority than the first uplink channel.

[0192] (User Terminal) Fig. 18 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0193] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0194] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which are described based on common understanding in the technical field to which the present disclosure relates.

[0195] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals and transfer them to the transceiver unit 220.

[0196] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be 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.

[0197] 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.

[0198] The transmitting / receiving antenna 230 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0199] 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.

[0200] The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0201] 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.

[0202] The transmitter / receiver unit 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 string to be transmitted, and output a baseband signal.

[0203] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and if not, it may not be necessary to perform DFT processing as the transmission processing.

[0204] The transceiver unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.

[0205] 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 band signal received by the transceiver antenna 230.

[0206] The transceiver unit 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.

[0207] 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.

[0208] The transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving unit 220 and the transmitting / receiving antenna 230.

[0209] The transceiver 220 may transmit the uplink control information using the first uplink channel.

[0210] When a plurality of first uplink channels that do not overlap in the time domain overlap with a second uplink channel that has a lower priority than the first uplink channels, the control unit 210 may control the mapping of uplink control information corresponding to the second uplink channel to at least one of the plurality of first uplink channels. The control unit 210 may determine the first uplink channel to be used for transmitting the uplink control information based on at least one of the transmission timing and size of each of the plurality of first uplink channels. The control unit 210 may divide the uplink control information and map it to the plurality of first uplink channels. When the second uplink channel overlaps with another second uplink channel that does not overlap with the plurality of first uplink channels, the control unit 210 may control the transmission of the uplink control information corresponding to the other second uplink channel using the other second uplink channel or the plurality of first uplink channels.

[0211] When a first uplink channel overlaps with a plurality of second uplink channels that have lower priority than the first uplink channel and do not overlap in the time domain, the controller 210 may control the mapping of at least one of the uplink control information corresponding to each of the plurality of second uplink channels to the first uplink channel. The controller 210 may combine the uplink control information corresponding to each of the plurality of second uplink channels and then map the combined uplink control information to the first uplink channel. The controller 210 may determine the uplink control information to be mapped to the first uplink channel based on at least one of the type and priority of the uplink control information corresponding to each of the plurality of second uplink channels. When any of the plurality of second uplink channels overlaps with another second uplink channel that does not overlap with the first uplink channel, the controller 210 may control the transmission of the uplink control information corresponding to the other second uplink channel using the other second uplink channel or the first uplink channel.

[0212] (Hardware Configuration) Note that 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. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining software with the single device or the multiple devices.

[0213] 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, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As described above, the implementation method of each is not particularly limited.

[0214] For example, a base station, a user terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 19 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described 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.

[0215] In the present disclosure, the terms apparatus, circuit, device, section, unit, etc. may be used 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.

[0216] For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by one processor, or processing may be performed by two or more processors simultaneously, serially, or in other ways. Furthermore, processor 1001 may be implemented by one or more chips.

[0217] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading specified software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0218] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as 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), transceiver unit 120 (220), etc. may be realized by the processor 1001.

[0219] The processor 1001 also reads 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 in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be implemented in a similar manner.

[0220] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EEPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory, etc. The memory 1002 may store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0221] Storage 1003 is a computer-readable recording medium and may be composed of at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a 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.

[0222] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. 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.

[0223] 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 outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0224] Furthermore, 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.

[0225] 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), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using this hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0226] (Modifications) Note that terms described in the present disclosure and terms necessary for understanding the present 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 interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0227] 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.

[0228] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by a transceiver in the frequency domain, and specific windowing performed by a transceiver in the time domain.

[0229] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may also be a time unit based on numerology.

[0230] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist 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.

[0231] A radio frame, a subframe, a slot, a minislot, and a symbol all represent time units for transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may be referred to by other names corresponding to 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 interchangeable.

[0232] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of the subframe and the 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. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0233] Here, TTI refers to, for example, the smallest 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.

[0234] 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) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0235] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0236] A TTI having a time length of 1 ms may be called a regular TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0237] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 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 greater than or equal to 1 ms.

[0238] 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 numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0239] 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 which may be composed of one or more resource blocks.

[0240] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0241] 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.

[0242] A Bandwidth Part (BWP), which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0243] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0244] 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 read as "BWP."

[0245] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. 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, etc. may be changed in various ways.

[0246] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0247] The names used for parameters and the like in this disclosure are not intended to be limiting in any way. Furthermore, the mathematical expressions 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 intended to be limiting in any way.

[0248] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0249] 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.

[0250] Input and output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0251] 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.

[0252] Note that the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0253] 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).

[0254] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value represented by true or false, or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0255] 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.

[0256] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if 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), these wired and / or wireless technologies are included within the definition of transmission media.

[0257] 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).

[0258] 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," "panel," etc. may be used interchangeably.

[0259] In the present 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. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0260] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication service within that coverage.

[0261] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0262] 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.

[0263] At least one of the base station and the mobile station may be referred to as 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 mobile body, the mobile body itself, etc. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile 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 also include devices that do not necessarily move during communication operations. 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.

[0264] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple 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, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0265] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0266] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc.), or a combination thereof.

[0267] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed 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.

[0268] Each aspect / embodiment described in the present disclosure may be a technology other than 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 decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other appropriate wireless communication methods, or to next-generation systems that are based on these and are extended thereto. In addition, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0269] 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."

[0270] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. 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 in some way precede the second element.

[0271] 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, etc.

[0272] Additionally, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0273] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "deciding" some action.

[0274] Furthermore, "judgment (decision)" may be read as "assuming," "expecting," "considering," or the like.

[0275] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0276] 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 elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0277] 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, etc., as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, etc., as some non-limiting and non-exhaustive examples.

[0278] 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."

[0279] 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." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0280] In this disclosure, where articles are 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.

[0281] 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 in modified and altered forms without departing from the spirit and scope of the invention as defined by the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and explanatory and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. A terminal characterized by having: a control unit that controls, when a plurality of first uplink channels that do not overlap in the time domain overlap with a second uplink channel that has a lower priority than the first uplink channels, to map uplink control information corresponding to the second uplink channel to at least one of the plurality of first uplink channels; and a transmission unit that transmits the uplink control information using the first uplink channel.

2. The terminal according to claim 1, characterized in that the control unit determines the first uplink channel to be used for transmitting the uplink control information based on at least one of the transmission timing and size of each of the plurality of first uplink channels.

3. The terminal according to claim 1, wherein the control unit divides the uplink control information and maps the divided information to the plurality of first uplink channels.

4. A terminal as described in any one of claims 1 to 3, characterized in that when the second uplink channel overlaps with another second uplink channel that does not overlap with the plurality of first uplink channels, the control unit controls the uplink control information corresponding to the other second uplink channel to be transmitted using the other second uplink channel or the plurality of first uplink channels.

5. A wireless communication method for a terminal, comprising: when a plurality of first uplink channels that do not overlap in the time domain overlap with a second uplink channel that has a lower priority than the first uplink channels, a step of controlling so that uplink control information corresponding to the second uplink channel is mapped to at least one of the plurality of first uplink channels; and a step of transmitting the uplink control information using the first uplink channel.

6. A base station characterized by having: a control unit that controls allocation of a first uplink channel and a second uplink channel that has a lower priority than the first uplink channel; and a receiving unit that receives the first uplink channel to which uplink control information corresponding to the second uplink channel is mapped when the first uplink channels and the second uplink channel overlap, but do not overlap in the time domain.

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