Terminal, wireless communication method, and base station

Abstract

A terminal involved in one embodiment of the present disclosure comprises: a receiving unit for receiving information related to the priority corresponding to an uplink control channel; and a control unit for determining, based on the format of each uplink control channel, whether uplink control information corresponding to each uplink control channel is sent, and the uplink control channel used in sending the uplink control information corresponding to each uplink control channel when multiple uplink control channels with different priorities overlap in the time domain.

Description

Technical Field

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

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized to achieve even higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) has been standardized to further enhance the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Releases (Rel.) 8 and 9).

[0003] Successor systems to LTE (for example, also referred to as fifth-generation mobile communication system (5G), 5G+ (plus), New Radio (NR), 3GPP Rel. 15 and later, etc.) are also under study.

[0004] Prior art literature

[0005] Non-patent literature

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

[0007] Problems to be solved by the invention

[0008] In future wireless communication systems (e.g., 5G, NR, etc.), for example, it is envisioned that multiple services (also referred to as use cases, communication types, etc.) with different communication requirements (requirements) such as high speed and large capacity (e.g., enhanced Mobile Broad Band (eMBB)), a large number of terminals (e.g., massive Machine Type Communication (mMTC) and Internet of Things (IoT)), and ultra-reliable and low latency (e.g., Ultra Reliable and Low Latency Communications (URLLC))) will coexist.

[0009] For example, in Rel. 16 and later, studies are underway to prioritize signals / channels and control communications based on the priorities assigned to each signal / channel. For example, if multiple signals / channels overlap, it is envisioned that transmission and reception will be controlled based on the priorities of each signal / channel.

[0010] On the other hand, it is also possible to consider the case where multiple UL transmissions transmitted on different carriers (or cells, CCs) overlap in the time domain and the priorities of the multiple UL transmissions differ. Thus, there has been insufficient research on how to control UL transmissions when multiple UL transmissions with different priorities are configured / scheduled on different carriers in the same time domain.

[0011] Therefore, one of the objects 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 setting of priorities.

[0012] Means for solving problems

[0013] A terminal involved in one embodiment of the present invention is characterized in that it comprises: a receiving unit for receiving information related to the priority corresponding to an uplink control channel; and a control unit for judging, based on the format of each uplink control channel, whether uplink control information corresponding to each uplink control channel is sent, and the uplink control channel used in sending the uplink control information corresponding to each uplink control channel when multiple uplink control channels with different priorities overlap in the time domain.

[0014] Effects of the Invention

[0015] According to one embodiment of the present disclosure, it is possible to appropriately control one or more UL transmissions that support setting of priorities. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a diagram showing an example of HARQ-ACK transmission for PDSCH.

[0017] Figure 2 This is a diagram showing an example of the configuration of a PUCCH resource set.

[0018] Figure 3 This is a diagram showing an example of PUCCH resources specified by DCI.

[0019] Figure 4A as well as Figure 4B This is a diagram showing an example of UL transmission control based on priority.

[0020] Figure 5 This is a diagram showing another example of UL transmission control based on priority.

[0021] Figure 6 This is a diagram showing an example of a case where multiple HARQ-ACK codebooks are transmitted in a specific time slot.

[0022] Figure 7 This is a diagram showing an example of a case where multiple HARQ-ACK codebooks overlap in the time domain.

[0023] Figure 8 This is a diagram showing an example of UL transmission control in the first embodiment.

[0024] Figure 9 This is a diagram showing an example of a method for determining a PUCCH resource set in the first example.

[0025] Figure 10 This is a diagram showing another example of the method for determining a PUCCH resource set in the first example.

[0026] Figure 11 This is a diagram showing an example of a method for adjusting combined UCI bits in the first embodiment.

[0027] Figure 12 This is a diagram showing an example of UL transmission control in the second example.

[0028] Figure 13A as well as Figure 13B This is a diagram showing another example of UL transmission control in the second example.

[0029] Figure 14A as well as Figure 14B This is a diagram showing another example of UL transmission control in the second example.

[0030] Figure 15 This is a diagram showing an example of UL transmission control in the second example.

[0031] Figure 16 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0032] Figure 17 This is a diagram showing an example of the configuration of a base station according to one embodiment.

[0033] Figure 18 This is a diagram showing an example of the configuration of a user terminal according to an embodiment.

[0034] Figure 19 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment. DETAILED DESCRIPTION

[0035] <Business Type>

[0036] Future wireless communication systems (e.g., NR) envision further advancements in mobile broadband (e.g., enhanced Mobile Broadband (eMBB)), machine-type communications that enable a large number of simultaneous connections (e.g., massive Machine Type Communications (mMTC) and the Internet of Things (IoT)), and ultra-reliable and low-latency communications (e.g., Ultra-Reliable and Low-Latency Communications (URLLC)). These types of services (also referred to as services, service types, communication types, use cases, and the like) are envisioned. For example, URLLC requires lower latency and higher reliability than eMBB.

[0037] The traffic type may also be identified in the physical layer based on at least one of the following.

[0038] Logical channels with different priorities

[0039] Modulation and Coding Scheme (MCS) table (MCS index table)

[0040] Channel Quality Indication (CQI) table

[0041] DCI format

[0042] Radio Network Temporary Identifier (RNTI: System Information - Radio Network Temporary Identifier) used for scrambling (masking) of the CRC (Cyclic Redundancy Check) bits included in (added to) the DCI (DCI format)

[0043] RRC (Radio Resource Control) parameters

[0044] Specific RNTI (e.g., RNTI for URLLC, MCS-C-RNTI, etc.)

[0045] Search space

[0046] Specific fields within DCI (e.g., newly added fields or reuse of existing fields)

[0047] Specifically, the service type of HARQ-ACK for PDSCH can also be determined based on at least one of the following.

[0048] The MCS index table used to determine at least one of the modulation order, target coding rate, and transport block size (TBS) of the PDSCH (e.g., whether to use MCS index table 3)

[0049] RNTI used for CRC scrambling of the DCI used for scheduling the PDSCH (e.g., whether the CRC is scrambled using C-RNTI or MCS-C-RNTI)

[0050] In addition, the service type of the SR may also be determined based on a higher-layer parameter used as an SR identifier (SR-ID). The higher-layer parameter may also indicate whether the service type of the SR is eMBB or URLLC.

[0051] In addition, the service type of the CSI may also be determined based on the configuration information (CSIreportSetting) related to the CSI report, the DCI type used in the trigger, or the DCI transmission parameters. The configuration information, DCI type, etc. may also indicate whether the service type of the CSI is eMBB or URLLC. In addition, the configuration information may also be a higher-layer parameter.

[0052] In addition, the service type of PUSCH can also be determined based on at least one of the following.

[0053] The MCS index table used to determine at least one of the modulation order, target coding rate, and TBS of the PUSCH (e.g., whether to use MCS index table 3)

[0054] RNTI used for CRC scrambling of the DCI used for scheduling the PUSCH (e.g., which of the C-RNTI or MCS-C-RNTI is CRC-scrambled)

[0055] The service type may be associated with communication requirements (e.g., requirements and conditions such as delay and error rate), data type (e.g., voice, data), and the like.

[0056] The difference between the requirements of URLLC and eMBB can be that the latency of URLLC is smaller than the latency of eMBB, or that the requirements of URLLC include reliability requirements.

[0057] For example, the requirements for the user (U) plane delay of eMBB may include a U-plane delay of 4ms for the downlink and a U-plane delay of 4ms for the uplink. On the other hand, the requirements for the U-plane delay of URLLC may include a U-plane delay of 0.5ms for the downlink and a U-plane delay of 0.5ms for the uplink. In addition, the requirements for the reliability of URLLC may include a 32-byte error rate of 10 for a U-plane delay of 1ms. -5 .

[0058] Furthermore, enhanced Ultra Reliable and Low Latency Communications (eURLLC) is being studied to improve the reliability of services used primarily for unicast data. Hereinafter, URLLC and eURLLC will be referred to simply as URLLC when no distinction is made.

[0059] PUCCH Resources

[0060] In existing wireless communication systems (e.g., Rel. 15), the PUCCH resources used for HARQ-ACK transmission for DL transmission (e.g., PDSCH) are determined based on information notified via DCI and higher-layer signaling. For example, the UE may use steps 1 to 3 below to determine the PUCCH resources used for HARQ-ACK transmission. Alternatively, the order of steps 1 to 3 may be reversed.

[0061] [Step 1]

[0062] In step 1, the UE or terminal (hereinafter referred to as simply UE) determines the HARQ-ACK feedback timing (K1). K1 corresponds to the period (e.g., time slot) from the reception of a DL transmission (e.g., PDSCH) to the transmission of the HARQ-ACK for that DL transmission. Information related to the HARQ-ACK timing (K1) may also be included in the DCI used in PDSCH scheduling.

[0063] The network (e.g., base station) may also notify the UE of K1 using a specific field of the DCI (or PDCCH) that schedules the PDSCH. For example, the bit value specified by the specific field of the DCI may be associated with a specific value (e.g., {1, 2, 3, 4, 5, 6, 7, 8}). Alternatively, the bit value specified by the specific field of the DCI may be associated with a value set by higher-layer signaling.

[0064] When receiving the DCI that schedules the PDSCH, the UE determines the timing of feeding back the HARQ-ACK for the PDSCH based on the information contained in the DCI (refer to Figure 1 ).exist Figure 1 In the example, the UE receives the PDSCH scheduled in slot #n based on the DCI transmitted in slot #n. Furthermore, the UE transmits HARQ-ACK using the PUCCH resource set in slot #n+1 based on the information related to the HARQ-ACK feedback timing included in the DCI (here, K1=1).

[0065] [Step 2]

[0066] In step 2, the UE determines the PUCCH resource set to be used in the time slot in which the HARQ-ACK is transmitted.

[0067] One or more PUCCH resource sets are notified (or configured) to the UE via higher layer signaling. A PUCCH resource set may also include more than one PUCCH resource. For example, K (e.g., 1 ≤ K ≤ 4) PUCCH resource sets may also be notified from the base station to the UE. Each PUCCH resource set may also include M (e.g., 8 ≤ M ≤ 32, or 1 ≤ M ≤ 8) PUCCH resources.

[0068] The UE may determine a single PUCCH resource set from the K configured PUCCH resource sets based on the UCI payload size (UCI payload size). The UCI payload size may also be the number of UCI bits excluding cyclic redundancy check (CRC) bits.

[0069] Figure 2 FIG is a diagram showing an example of allocation of PUCCH resources. Figure 2 As an example, K = 4, and four PUCCH resource sets #0-#3 are configured by the base station to the UE via higher-layer signaling. Furthermore, PUCCH resource sets #0-#3 each contain M (e.g., 8 ≤ M ≤ 32) PUCCH resources #0-#M-1. Furthermore, the number of PUCCH resources contained in each PUCCH resource set can be the same or different.

[0070] exist Figure 2 In the

[0014] , each PUCCH resource configured for the UE may include the value of at least one of the following parameters (also referred to as fields or information, etc.). In addition, a range of values that can be taken by each PUCCH format may be determined for each parameter.

[0071] The symbol at which PUCCH allocation starts (start symbol)

[0072] The number of symbols allocated to the PUCCH in a slot (the period allocated to the PUCCH)

[0073] The index of the resource block (Physical Resource Block (PRB)) where PUCCH allocation starts

[0074] The number of PRBs allocated to PUCCH

[0075] Whether to activate frequency hopping in PUCCH

[0076] The frequency resource of the second hop when frequency hopping is enabled, and the index of the initial cyclic shift (CS: Cyclic Shift)

[0077] The index of an orthogonal spreading code in the time domain (e.g., an orthogonal cover code (OCC)), and the length of the OCC used for block spreading before discrete Fourier transform (DFT) (also called OCC length, spreading factor, etc.)

[0078] The index of the OCC used in block-wise spreading after DFT

[0079] like Figure 2 As shown, when PUCCH resource sets #0 to #3 are configured for the UE, the UE selects any one of the PUCCH resource sets based on the UCI payload size.

[0080] For example, when the UCI payload size is 1 or 2 bits, PUCCH resource set #0 is selected. Furthermore, when the UCI payload size is 3 bits or more and N2-1 bits or less, PUCCH resource set #1 is selected. Furthermore, when the UCI payload size is N2 bits or more and N3-1 bits or less, PUCCH resource set #2 is selected. Similarly, when the UCI payload size is N3 bits or more and N3-1 bits or less, PUCCH resource set #3 is selected.

[0081] Thus, the range of UCI payload size for selecting PUCCH resource set #i (i=0, ..., K-1) is expressed as N i N bits or more i+1 -1 bit or less (ie, {N i ,…,N i+1 -1} bits).

[0082] Here, the starting positions (starting bit numbers) N0 and N1 of the UCI payload sizes used by PUCCH resource sets #0 and #1 may be 1 and 3, respectively. Therefore, when transmitting UCI of 2 bits or less, PUCCH resource set #0 is selected, and therefore PUCCH resource set #0 may include PUCCH resources #0 to #M-1 for at least one of PF0 and PF1. On the other hand, when transmitting UCI of more than 2 bits, any one of PUCCH resource sets #1 to #3 is selected, and therefore PUCCH resource sets #1 to #3 may include PUCCH resources #0 to #M-1 for at least one of PF2, PF3, and PF4, respectively.

[0083] In the case of i=2, ..., K-1, it indicates the starting position of the UCI payload size for PUCCH resource set #i (N i ) information (starting position information) can also be notified (or set) to the UE using high-layer signaling. i ) can also be UE-specific. For example, the starting position (N i ) can also be set to a value in the range of 4 bits or more and 256 bits or less (for example, a multiple of 4). Figure 2 In the example, information indicating the starting position (N2, N3) of the UCI payload size for PUCCH resource sets #2 and #3 is notified to the UE via higher layer signaling (eg, user-specific RRC signaling).

[0084] The maximum payload size of the UCI of each PUCCH resource set is determined by N K -1 is given. N KIt can be explicitly notified (set) to the UE through higher layer signaling and / or DCI, or it can be implicitly derived. Figure 2 In the example, N0=1 and N1=3 may be specified by the specification, and N2 and N3 may be notified by higher layer signaling. In addition, N4 may also be specified by the specification (for example, N4=1706).

[0085] In this way, the UE selects one PUCCH resource set from one or more PUCCH resource sets configured by higher layers based on the UCI payload size (for example, HARQ-ACK bits when the UCI is HARQ-ACK).

[0086] [Step 3]

[0087] In step 3, the UE determines one PUCCH resource from one or more PUCCH resources included in the PUCCH resource set.

[0088] For example, the UE may also determine the PUCCH resources used in transmitting UCI based on DCI and at least one of implicit information (also called implicit indication information or implicit index, etc.) from the M PUCCH resources included in the determined PUCCH resource set.

[0089] exist Figure 2 In the case shown, the user terminal can determine a single PUCCH resource to be used for UCI transmission based on the value of the specific field of the DCI from PUCCH resources #0 to #M-1 included in the PUCCH resource set selected based on the UCI payload size.

[0090] The number of PUCCH resources M in a PUCCH resource set can also be set to the user terminal through higher layer signaling (refer to Figure 3 ).exist Figure 3 , 8 PUCCH resources are configured by higher layer signaling. Here, the PUCCH resources in the PUCCH resource set are notified by a 3-bit field in the DCI, but the number of bits is not limited to this.

[0091] <Priority Setting>

[0092] In NR versions beyond Rel. 16, studies are underway to establish multiple levels of priority (e.g., two levels) for specific signals or channels. For example, it is envisioned that each signal or channel corresponding to a different service type (also known as service, service type, communication type, use case, etc.) would be prioritized and communications would be controlled (e.g., transmission control in the event of a conflict). This would allow for different priorities to be established for the same signal or channel, depending on the service type, to control communications.

[0093] Priority may be set for at least one of a signal (e.g., UCI such as HARQ-ACK, reference signal, etc.), a channel (e.g., 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. Furthermore, priorities may be set separately for the PUCCH used for SR transmission, the PUCCH used for HARQ-ACK transmission, and the PUCCH used for CSI transmission.

[0094] The priority may be defined by a first priority (eg, high) and a second priority (eg, low) lower than the first priority. Alternatively, three or more priority levels may be set.

[0095] For example, priorities may be set for HARQ-ACK for dynamically scheduled PDSCH, HARQ-ACK for semi-persistent PDSCH (SPS PDSCH), and HARQ-ACK for SPS PDSCH release. Alternatively, priorities may be set for the HARQ-ACK codebooks corresponding to these HARQ-ACKs. In addition, when setting priorities for PDSCH, the priority of PDSCH may be replaced with the priority of HARQ-ACK for the PDSCH.

[0096] Furthermore, priorities may be set for PUSCH based on dynamic grant, PUSCH based on configured grant, and the like.

[0097] Information related to the priority can also be notified to the UE from the base station using at least one of the higher layer signaling and DCI. For example, the priority of the scheduling request can also be set by a higher layer parameter (e.g., schedulingRequestPriority). The priority of the HARQ-ACK for the PDSCH (e.g., dynamic PDSCH) scheduled by DCI can also be notified by the DCI. The priority of the HARQ-ACK for the SPS PDSCH can be set by an upper parameter (e.g., HARQ-ACK-Codebook-indicator-forSPS) or by a DCI indicating the activation of the SPS PDSCH. The P-CSI / SP-CSI sent via the PUCCH can also be set with a specific priority (e.g., low). On the other hand, the A-CSI / SP-CSI sent via the PUSCH can also be notified of its priority by DCI (e.g., triggering DCI or activation DCI).

[0098] The priority of a PUSCH based on a dynamic grant can also be notified by the DCI that schedules the PUSCH. The priority of a PUSCH based on a set grant can also be set by a higher-layer parameter (e.g., priority). A-SRS triggered by P-SRS / SP-SRS and DCI (e.g., DCI format 0_1 / DCI format 2_3) can also be assigned a specific priority (e.g., low).

[0099] (Overlap of UL transmission)

[0100] In the case where multiple UL signals / UL channels overlap (or collide), the UE may also control UL transmission based on priority.

[0101] The overlapping of multiple UL signals / UL channels may also refer to the overlapping of the time resources (or time resources and frequency resources) of the multiple UL signals / UL channels, or the overlapping of the transmission timings of the multiple UL signals / UL channels. The time resource may also be replaced by the time domain or the time domain. The time resource may also be a symbol, a slot, a subslot, or a subframe.

[0102] Overlapping of multiple UL signals / UL channels in the same UE (e.g., intra-UE) may also mean overlapping of multiple UL signals / UL channels in at least the same time resource (e.g., symbol). Furthermore, UL signal / UL channel collision in different UEs (e.g., inter-UE) may also mean overlapping of multiple UL signals / UL channels in the same time resource (e.g., symbol) and frequency resource (e.g., RB).

[0103] For example, when multiple UL signals / UL channels with the same priority overlap, the UE controls so that the multiple UL signals / UL channels are multiplexed into one UL channel for transmission (refer to Figure 4A ).

[0104] exist Figure 4A , a case where HARQ-ACK (or PUCCH for HARQ-ACK transmission) with a first priority (high) set is overlapped with UL data / UL-SCH (or PUSCH for UL data / UL-SCH transmission) with a first priority (high) set is shown. In this case, the UE multiplexes (or maps) the HARQ-ACK onto the PUSCH to transmit both the UL data and the HARQ-ACK.

[0105] In the case where multiple UL signals / UL channels with different priorities overlap, the UE may also perform control so that the UL transmission with a higher priority is performed (for example, the UL transmission with a higher priority is prioritized) and the UL transmission with a lower priority is not performed (for example, discarded) (refer to Figure 4B ).

[0106] exist Figure 4B , illustrates a situation where UL data / HARQ-ACK (or the UL channel for transmitting UL data / HARQ-ACK) set to a first priority (high) overlaps with UL data / HARQ-ACK (or the UL channel for transmitting UL data / HARQ-ACK) set to a second priority (low). In this case, the UE controls the UL data / HARQ-ACK to discard the lower-priority UL data / HARQ-ACK and prioritize the transmission of the higher-priority UL data / HARQ-ACK. Furthermore, the UE may also change (e.g., delay or shift) the transmission timing of the lower-priority UL transmission.

[0107] In the case where more than two (or more than three) UL signals / UL channels overlap in the time domain, the transmission can also be controlled in two steps (refer to Figure 5 ).

[0108] In step 1, a UL channel is selected to multiplex UL signals transmitted respectively through UL transmission with the same priority. Figure 5In the embodiment of the present invention, SR (or PUCCH for SR transmission) and HARQ-ACK (or PUCCH for HARQ-ACK transmission) with a first priority (high) can also be multiplexed into a specific UL channel (here, PUCCH for HARQ-ACK transmission). Similarly, HARQ-ACK (or PUCCH for HARQ-ACK transmission) and data (or PUSCH for data / UL-SCH transmission) with a second priority (low) can also be multiplexed into a specific UL channel (here, PUSCH).

[0109] In step 2, control can also be performed so that among UL transmissions with different priorities, the UL transmission with a higher priority is transmitted first and the UL transmission with a lower priority is discarded. Figure 5 In the embodiment, SR and PUCCH for HARQ-ACK transmission with a first priority (high) may be sent preferentially, and HARQ-ACK and PUSCH for data transmission with a second priority (low) may be discarded.

[0110] In this way, the UE can resolve conflicts between multiple UL transmissions with the same priority through step 1, and resolve conflicts between multiple UL transmissions with different priorities through step 2.

[0111] (Multiplexing HARQ-ACK codebook)

[0112] In Rel. 16 and later, a maximum of N HARQ-ACK codebooks may be constructed in a specific time slot (e.g., one time slot). N may be, for example, 2. For example, when N is 2, the UE may construct two HARQ-ACK codebooks with different priorities (or codebooks corresponding to different priorities / different service types) in a specific time slot and feed back the codebooks.

[0113] The UE may also control the generation of the HARQ-ACK codebook (e.g., generation of HARQ-ACK bits within the HARQ-ACK codebook) based on the value of the priority notification field (e.g., priority indicator field) included in the DCI corresponding to each PDSCH. Figure 6 This example shows the case where two HARQ-ACK codebooks (here, CB#0 and CB#1) corresponding to different priorities are generated and fed back in time slot #n. CB#0 corresponds to the second priority (low) or eMBB, and CB#1 corresponds to the first priority (high) or URLLC.

[0114] exist Figure 6In the example, the DCI corresponding to the PDSCH transmitted in slot #n-5 notifies that the HARQ-ACK feedback timing is slot #n (K1=5) and the second priority (low). The DCI corresponding to the PDSCH transmitted in slot #n-3 notifies that the HARQ-ACK feedback timing is slot #n (K1=3) and the second priority (low).

[0115] exist Figure 6 In the example, through the DCI corresponding to the PDSCH transmitted in time slot #n-2 (sub-time slots #n-4, #n-5), the feedback timing of HARQ-ACK is notified as time slot #n (sub-time slot #n) (K1=5 sub-time slots) and is the first priority (high).

[0116] In this case, the UE may also generate and feed back two HARQ-ACK codebooks (CB#0 and CB#1) in time slot #n.

[0117] On the other hand, the case where the UL resources (eg, PUCCH / PUSCH) for CB#0 and the UL resources for CB#1 overlap in the time domain is also considered (refer to Figure 7 In this case, it is considered to control the transmission of HARQ-ACK based on the priority corresponding to HARQ-ACK (or CB). Specifically, CBs with high priority are transmitted and CBs with low priority are discarded.

[0118] As described above, when a plurality of UL transmissions overlap in the time domain, studies are underway to control the UE so that only the UL transmission (or UL channel / UL signal) with a high priority is transmitted.

[0119] On the other hand, even when multiple UL transmissions with different priorities overlap in the time domain, it is considered possible to allow these multiple UL transmissions depending on the communication environment, communication conditions, and UE capabilities. Supporting these multiple UL transmissions is beneficial from the perspectives of reducing latency and spectral efficiency.

[0120] The communication environment / communication conditions / UE capabilities may also refer to the cells to which multiple UL transmissions are transmitted and the transmission / reception processing capabilities supported by the UE (e.g., RF circuitry included in the UE). For example, when multiple UL transmissions of different priorities are scheduled between cells supported by different RFs, the multiple UL transmissions may be supported (e.g., simultaneously).

[0121] However, when supporting / allowing the transmission of a plurality of UL transmissions having different priorities, how to control the UL transmission becomes a problem.

[0122] The inventors of the present invention focused on supporting / allowing multiple UL transmissions according to the communication environment / communication conditions / UE capabilities even when multiple UL transmissions with different priorities overlap in the time domain, and studied the control of the multiple UL transmissions to come up with one method of the present embodiment.

[0123] Specifically, as one aspect of this embodiment, the inventors of the present invention focused on the fact that transmission conditions / parameters are set for multiple UL channels (e.g., PUCCHs) with different priorities that overlap in the time domain, and conceived of controlling the transmission of UCI corresponding to each PUCCH based on the transmission conditions / parameters corresponding to each PUCCH. The transmission conditions / parameters corresponding to the PUCCH may also be at least one of a PUCCH resource, a PUCCH format, a PUCCH structure (PUCCH configuration), and a PUCCH resource set.

[0124] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The configurations described in each embodiment may be applied individually or in combination.

[0125] In addition, in the present disclosure, “A / B” may be replaced by at least one of A and B, and “A / B / C” may be replaced by at least one of A, B, and C.

[0126] In the following description, two levels of UL transmission priority, a first priority (high) and a second priority (low), are used as an example. However, the priority is not limited to two levels, and three or more levels of priority may be set.

[0127] In the present disclosure, the terms "UL transmission," "UL channel," and "UL signal" may be used interchangeably. Furthermore, in the present disclosure, the terms "carrier," "cell," "CC," "BWP," and "frequency band" may be used interchangeably. Furthermore, in the present disclosure, the term "sent" may be replaced by "scheduled," "set," or "allocated." Furthermore, in the present disclosure, the term "time domain" may be replaced by "time resource" or "codeword." Furthermore, in the present disclosure, the term "overlap" may be replaced by "collision" or "repetition." Furthermore, in the present disclosure, the term "discard" may be replaced by "truncation" or "cancellation."

[0128] (First Method)

[0129] In the first embodiment, an example of UL transmission control when a plurality of UL transmissions having different priorities overlap in the time domain will be described.

[0130] When the first and second PUCCHs overlap in the time domain, the UE may also control the transmission of the UCI corresponding to each PUCCH (e.g., whether to transmit / PUCCH used during transmission) based on the format of the first PUCCH / the format of the second PUCCH. UCI may also be replaced with HARQ-ACK or HARQ-ACK+SR.

[0131] In the first embodiment, a first PUCCH corresponding to a first priority (high) collides with a second PUCCH corresponding to a second priority (low). This embodiment is described using the case where the format of the first PUCCH is a specific value or higher (e.g., PUCCH format 2, 3, or 4). A PUCCH format of a specific value or higher may also correspond to a PUCCH format capable of transmitting more UCI than a specific bit (e.g., 2 bits).

[0132] Assume that the first PUCCH (high) and the second PUCCH (low) overlap in the time domain, and the format of the first PUCCH is a specific PF 2, 3, or 4. In this case, the UE can also use the first PUCCH to transmit the second UCI corresponding to (or allocated to) the second PUCCH.

[0133] For example, the UE appends the second UCI to the first UCI corresponding to the first PUCCH, and transmits the combined UCI (eg, combined UCI) bits of the first UCI and the second UCI using the first PUCCH resource corresponding to the first PUCCH (see Figure 8 ).

[0134] PF2 / 3 / 4 supports the transmission of UCI with at least more than 2 bits. Therefore, when PF2 / 3 / 4 is applied to the first PUCCH, the first PUCCH can be used to appropriately transmit the combined UCI (first UCI + second UCI).

[0135] In addition, if specific conditions (e.g., a specific timeline) are met, the UE may also use the first PUCCH to transmit the second UCI. The specific timeline may also be defined based on the transmission timing of the first PUCCH (or, first UCI) and the transmission timing of the second PUCCH (or, second UCI).

[0136] <Determination of the First PUCCH Resource>

[0137] When the first UCI bit and the second UCI bit are sent using the first PUCCH (for example, the UCI bits are combined), the UE may also use at least one of the following options A-1 and A-2 to determine the first PUCCH resource.

[0138] [Option A-1]

[0139] The UE may also control the transmission of the combined UCI bit using the first PUCCH resource selected based on the first UCI bit. That is, even when the second UCI is mapped to the first PUCCH resource (or the second UCI is appended to the first UCI), the UE may determine the first PUCCH resource based on the first UCI bit.

[0140] In this case, control can also be performed (or limited to not exceeding the maximum number of bits (Ni)) so that the number of combined UCI bits does not exceed the maximum number of bits (Ni) corresponding to the boundary of the PUCCH resource set size set in the first PUCCH.

[0141] For example, it is assumed that the first UCI bit number is within the range of PUCCH resource set #1 (for example, 2 < UCI bit number ≤ N2) (refer to Figure 9 Ni may also be a value set for the first PUCCH. Option A-1 can be appropriately used when the number of combined UCI bits (first UCI bit number + second UCI bit number) is within the same PUCCH resource set #1 range (for example, 2 < number of UCI bits ≤ N2) or is limited to this range.

[0142] When using Option A-1, the PUCCH resource set determined based on the first UCI bit can be used as the first PUCCH resource. That is, the UE can use PUCCH resources determined using the same mechanism as when PUCCHs do not collide, eliminating the need for PUCCH reselection.

[0143] [Option A-2]

[0144] The UE may also control the transmission of the combined UCI bits using a first PUCCH resource selected based on the first UCI bits and the second UCI bits (e.g., the combined UCI bits). That is, when the second UCI is mapped to the first PUCCH resource (or the second UCI is appended to the first UCI), the UE may determine (or reselect) the first PUCCH resource based on the number of bits after adding the second UCI bits to the first UCI bits.

[0145] In this case, control can also be performed (or limited to not exceeding the maximum number of bits (N4)) so that the number of combined UCI bits does not exceed the maximum number of bits (N4) set in the PUCCH resource set size of the first PUCCH.

[0146] For example, it is assumed that the first number of UCI bits is within the range of PUCCH resource set #1 (for example, 2 < number of UCI bits ≤ N2). Ni can also be a value set for the first PUCCH. In the case where the combined number of UCI bits (first number of UCI bits + second number of UCI bits) is not within the range of the same PUCCH resource set #1 (for example, 2 < number of UCI bits ≤ N2), the UE can also select another PUCCH resource set (for example, PCCH resource set #2 here) (refer to Figure 10 ).

[0147] Therefore, even when the PUCCH resource set corresponding to the first number of UCI bits and the PUCCH resource set corresponding to the combined number of UCI bits are different, transmission can be performed using an appropriate PUCCH resource set.

[0148] <Decisions / Adjustments in conjunction with UCI bits>

[0149] When the first PUCCH is used to send the first UCI bit and the second UCI bit (e.g., a combined UCI bit), the UE may also use at least one of the following options B-1 and B-2 to determine / adjust the number of bits of the combined UCI (e.g., at least the second UCI bit).

[0150] [Option B-1]

[0151] When the number of combined UCI bits does not exceed a specific value (or is less than a specific value), the UE may also directly (or retain the same) add the second UCI bit by mapping it to the first PUCCH resource (or in the first UCI). The specific value may also be at least one of the maximum number of bits (Ni) corresponding to the boundary of the PUCCH resource set size in Option A-1 and the maximum number of bits (N4) of the PUCCH resource set size in Option A-2.

[0152] Alternatively, the specific value may be predefined by a specification, or may be notified / set from the base station to the UE via higher layer signaling or the like.

[0153] When the total bit value after adding the first and second UCI bits exceeds a specific value (or when the number of second UCI bits exceeds a specific value), the UE may also control the transmission of a portion of the second UCI bits and discard the remaining portion. The number of the portion of the second UCI bits to be transmitted may be determined based on a specific value or predefined in the specification.

[0154] Alternatively, the UE may also perform control so as not to send the second UCI.

[0155] Therefore, even when the size of the combined bits (first UCI bit + second UCI bit) exceeds a specific value (the maximum value supported by the PUCCH resource), UL transmission can be appropriately performed.

[0156] [Option B-2]

[0157] The UE may also perform processing to limit the number of bits of the second UCI. For example, the UE may bundle the second UCI bits and then map them to the first PUCCH (or append them to the first UCI). This processing to limit the number of bits of the second UCI may be applied when the number of second UCI bits exceeds a specific value in Option B-1, or may be applied regardless of whether the number of second UCI bits exceeds the specific value in Option B-1.

[0158] After the UE bundles the second UCI bits, when the number of combined UCI bits exceeds a specific number, control may be performed to further send a portion of the second UCI bits and discard the remaining portion.

[0159] For example, the UE may bundle the second UCI bits so that the second UCI bits have a specific number of bits. The specific number of bits may also be, for example, 1 bit. Alternatively, the specific bits may be defined by a specification or notified / set to the UE from the base station via higher-layer signaling.

[0160] Alternatively, the bundling size (or bundling unit) may be notified / set to the UE from the base station via higher layer signaling. For example, when the bundling size is X, the UE may bundle the second UCI bits into 1 bit every X bits (in units of X bits).

[0161] For example, if the second UCI bit number is 18 and the bundling size is 4, the 18 bits are bundled into 1 bit every 4 bits. In this case, the second UCI is adjusted from 18 bits to 5 bits. The UE controls so that the adjusted second bit number (here, 5 bits) is multiplexed / mapped to the first PUCCH resource.

[0162] Alternatively, the UE may apply multi-level adjustment (e.g., bundling (e.g., multi-level bundling)) to the second UCI bit. When the total size of the combined bits (first UCI bit + second UCI bit) exceeds a specific value, the UE may also control the bits to be discarded sequentially from the upper bits. Figure 11 An example is shown in which three-level bundling is applied.

[0163] exist Figure 11, the following case is shown: the second UCI bit is 64 bits, 8 bits are obtained through the first level adjustment (e.g., bundling), 12 bits are obtained through the second level adjustment (e.g., bundling), and 8 bits are obtained through the third level adjustment. These values are examples and are not limited to this.

[0164] In the first-level adjustment, the second UCI bits (here, 64 bits) are bundled (adjusted to 1 bit) every X bits (here, X = 8). The UE sets the value to "0" if the 8-bit unit contains at least one "0" and to "1" if all bits are "1." Here, the result of the first-level bundling is 01101011.

[0165] In the second-level adjustment, the groups that became "0" (here, 8-bit groups) by the first-level adjustment are bundled every Y bits (here, Y = 2) (adjusted to 1 bit). Here, the three groups that became "0" by the first-level bundling (here, 11111011, 11001111, and 11110110) are bundled every 2 bits to obtain 1101, 1011, and 1100.

[0166] In the third-level adjustment, for the groups of "0" (here, 2-bit groups) that have been converted to "0" by the second-level adjustment, the original bits are represented as third-level bit information using Y bits (here, Y = 2). Here, the original bits corresponding to the four "0"s converted to "0" by the second-level bundling are 10, 00, 01, and 10.

[0167] The transmitted second UCI bit may also be controlled based on the total size of the first UCI bit and the adjusted second UCI bit. For example, if the first UCI bit and the adjusted second UCI bit (e.g., 28 bits (8 bits for first-level adjustment + 12 bits for second-level adjustment + 8 bits for third-level adjustment)) do not exceed a specific value, the bits corresponding to the multi-level adjustment (here, 28 bits) may be transmitted as the second UCI bit.

[0168] On the other hand, if the first UCI bit and the adjusted second UCI bit (e.g., 28 bits) exceed a specific value, the UE may also discard some or all of the second UCI bits so as not to exceed the specific value. The order of discarding may also be the bits of the third level adjustment, the second level adjustment, and the first level adjustment. For example, if the first UCI bit and the adjusted second UCI bit (e.g., 20 bits (8 bits of first level adjustment + 12 bits of second level adjustment)) do not exceed a specific value, the bits corresponding to the first and second level adjustments (here, 20 bits) may be sent as the second UCI bits.

[0169] In this way, even if the original first UCI bits and second UCI bits exceed the size supported by the first PUCCH resource, the first UCI bits and part of the second UCI bits can be properly transmitted by adjusting the number of second UCI bits.

[0170] Coding with UCI bits

[0171] The UE may also send the first UCI bit and the second UCI bit (e.g., a combined bit) as a joint coding. For example, the first HARQ-ACK codebook containing the first UCI bit and the second HARQ-ACK codebook containing the second UCI bit may be centrally coded. Alternatively, the first UCI bit and the second UCI bit may be included in the same HARQ-ACK codebook for joint coding.

[0172] Alternatively, for the UE, the UE may also independently encode the first UCI bit and the second UCI bit (e.g., a combined bit) and send them. For example, the first HARQ-ACK codebook containing the first UCI bit and the second HARQ-ACK codebook containing the second UCI bit may also be encoded separately. In this case, the coding condition (e.g., coding rate) applied to the first UCI bit and the coding condition applied to the second UCI bit may also be different. For example, control may also be performed so that the coding rate of the first UCI bit is lower than the coding rate of the second UCI bit.

[0173] (Second Method)

[0174] In the second embodiment, another example of UL transmission control when a plurality of UL transmissions having different priorities overlap in the time domain will be described.

[0175] In the second method, the following case is used as an example: a first PUCCH corresponding to a first priority (high) collides with a second PUCCH corresponding to a second priority (low), and the format of the first PUCCH and the format of the second PUCCH are less than a specific value (for example, PUCCH format 0 or 1). A PUCCH format less than a specific value may also correspond to a PUCCH format capable of transmitting UCI of a specific number of bits (for example, 2 bits) or less.

[0176] In this case, the UE may also control the transmission of UCI corresponding to each PUCCH based on at least one of the priority corresponding to each PUCCH and the format of each PUCCH. The format of the first PUCCH and the format of the second PUCCH may be the same or different.

[0177] For example, the UE may also control UL transmission based on at least one of the following options 2-1 to 2-3. The following describes options that the UE can apply for each first PUCCH format.

[0178] <When the first PUCCH format is PF0>

[0179] [Option 2-1]

[0180] The UE may also be controlled to discard the UCI corresponding to the second PUCCH and use the first PUCCH to send the UCI corresponding to the first PUCCH (refer to Figure 12 ). In this way, when the bit size that can be transmitted by the conflicting first PUCCH and second PUCCH is less than 2 bits, the UCI (or PUCCH) with low priority is discarded. This allows the UCI with high priority to be transmitted appropriately.

[0181] [Option 2-2]

[0182] The UE may also control the first UCI and the second UCI (e.g., combined UCI) to be transmitted using the first PUCCH (PF0) resource. For example, the UE may also transmit at least one of the first UCI (e.g., HARQ-ACK) and the second UCI (e.g., HARQ-ACK) using the cyclic shift of the first PUCCH resource (see Figure 13A 、 Figure 13B ).

[0183] Figure 13A This example shows a case where a 1-bit first UCI and a 1-bit second UCI are transmitted using a first PUCCH resource. Here, a case is shown where a combination of a first UCI (e.g., a HARQ-ACK value) and a second UCI (e.g., a HARQ-ACK value for multiplexing) is associated with a specific cyclic shift value (m_cs).

[0184] Figure 13B This example shows a case where a 2-bit first UCI and a 1-bit second UCI are transmitted using a first PUCCH resource. Here, a case is shown where a combination of a first UCI (e.g., a HARQ-ACK value) and a second UCI (e.g., a HARQ-ACK value for multiplexing) is associated with a specific cyclic shift value.

[0185] When the number of bits of the second UCI is 2 bits, the UE may bundle the second UCI bits into 1 bit and then send the second UCI using the first PUCCH resource.

[0186] By transmitting UCI using cyclic shift in this manner, the first UCI and the second UCI can be transmitted even when using PF0, which has a small number of transmittable bits.

[0187] [Option 2-3]

[0188] In option 2-2, only when the number of bits of the first UCI is 1, the UE may also control the first UCI and the second UCI to be transmitted using the first PUCCH (PF0) resource (refer to Figure 13A ). When the number of bits of the second UCI is 2 bits, the UE may also bundle the second UCI bits into 1 bit and use the first PUCCH resource to send it.

[0189] On the other hand, when the number of first UCI bits is 2, control can be performed so that the UCI corresponding to the second PUCCH is discarded and the UCI corresponding to the first PUCCH is transmitted using the first PUCCH. This can reduce the number of cyclic shifts used in transmitting the first and second UCI, thereby improving the reliability of the first PUCCH transmission.

[0190] <When the first PUCCH format is PF1>

[0191] [Option 2-1]

[0192] The UE may also be controlled to discard the UCI corresponding to the second PUCCH and use the first PUCCH to send the UCI corresponding to the first PUCCH (refer to Figure 12 ). In this way, when the bit size that can be transmitted by the conflicting first PUCCH and second PUCCH is less than 2 bits, the UCI (or PUCCH) with low priority is discarded. This allows the UCI with high priority to be transmitted appropriately.

[0193] [Option 2-2]

[0194] When the second PUCCH is FP0, the UE may also perform control so that the first UCI and the second UCI (e.g., combined UCI) are transmitted using the second PUCCH (PF0) resource. For example, the UE may also transmit at least one of the first UCI (e.g., HARQ-ACK) and the second UCI (e.g., HARQ-ACK) using the cyclic shift of the second PUCCH resource (see Figure 14A 、 Figure 14B ).

[0195] Figure 14A An example of using a second PUCCH resource to transmit a 1-bit first UCI and a 1-bit second UCI is shown. Here, a combination of the second UCI (e.g., a HARQ-ACK value) and the first UCI (e.g., a HARQ-ACK value for multiplexing) is associated with a specific cyclic shift value (m_cs).

[0196] Figure 14B This example shows a case where a 2-bit first UCI and a 1-bit second UCI are transmitted using a second PUCCH resource. Here, a case is shown where a combination of the second UCI (e.g., a HARQ-ACK value) and the first UCI (e.g., a HARQ-ACK value for multiplexing) is associated with a specific cyclic shift value.

[0197] When the number of bits of the second UCI is 2 bits, the UE may bundle the second UCI bits into 1 bit and then send the second UCI using the second PUCCH resource.

[0198] By transmitting UCI using cyclic shift in this manner, the first UCI and the second UCI can be transmitted even when using PF0, which has a small number of transmittable bits.

[0199] In addition, when the second PUCCH is FP1, option 2-1 can also be applied.

[0200] [Option 2-3]

[0201] In option 2-2, only when the number of bits of the first UCI is 1, the UE may also control the UE to use the second PUCCH (PF0) resource to transmit the first UCI and the second UCI (refer to Figure 14A ). When the number of bits of the second UCI is 2 bits, the UE may also bundle the second UCI bits into 1 bit and use the first PUCCH resource to send it.

[0202] On the other hand, when the number of first UCI bits is 2, control can be performed so that the UCI corresponding to the second PUCCH is discarded and the UCI corresponding to the first PUCCH is transmitted using the first PUCCH. This can reduce the number of cyclic shifts used in transmitting the first and second UCI, thereby improving the reliability of the first PUCCH transmission.

[0203] (Third Method)

[0204] In the third aspect, another example of UL transmission control when a plurality of UL transmissions having different priorities overlap in the time domain will be described.

[0205] In the third method, the following situation is taken as an example: the first PUCCH corresponding to the first priority (high) conflicts with the second PUCCH corresponding to the second priority (low), the format of the first PUCCH is less than a specific value (for example, PUCCH format 0 or 1), and the second PUCCH format is above a specific value (for example, PUCCH format 2, 3 or 4).

[0206] When a specific condition is met, the UE may also be controlled to use the second PUCCH (or the second PUCCH resource) to transmit the first UCI and the second UCI (for example, combined with the UCI) (see Figure 15 ). The specific condition may also be the relationship between the transmission timings of the first PUCCH and the second PUCCH (for example, a timeline).

[0207] For example, when at least one of the following conditions 1 and 2 is satisfied, the UE may also perform control so as to use the second PUCCH to transmit the first UCI (or in combination with the UCI).

[0208] <Condition 1>

[0209] Condition 1 may also be a case where a specific symbol of the second PUCCH resource (e.g., an ending symbol) is configured as X symbols after a specific symbol of the conflicting first PUCCH resource (e.g., an ending symbol). X may be defined by a specification or may be a value notified / set to the UE from the base station through higher layer signaling, etc.

[0210] For example, X may be 0. In this case, if the end symbol of the second PUCCH resource is the same as the end symbol of the first PUCCH resource or is configured earlier in time, the UE may use the second PUCCH to transmit the first UCI. In other cases (for example, if the end symbol of the first PUCCH resource is configured X symbols earlier than the end symbol of the second PUCCH resource), the second PUCCH (or second UCI) may be discarded and the first UCI may be transmitted using the first PUCCH. This can suppress the delay of the high-priority first UCI.

[0211] <Condition 2>

[0212] The second condition may also be a case where a specific codeword of the second PUCCH resource (for example, a starting codeword (Starting symbol)) does not exceed the process timeline of the first priority (for example, the first PUCCH / first UCI). For example, it may also be a case where the starting codeword of the second PUCCH resource and the starting codeword of the conflicting first PUCCH resource are configured within a range of Y codewords (or, the starting codeword of the first PUCCH resource is configured within Y codewords from the starting codeword of the second PUCCH resource).

[0213] This is because, if the starting position of the second PUCCH resource is set too early compared to the starting position of the first PUCCH resource, the transmission of the PDSCH corresponding to the first UCI (e.g., HARQ-ACK) has not yet completed, making it difficult to multiplex the HARQ-ACK into the second PUCCH. In this case, the second PUCCH (or second UCI) can be discarded and the first UCI can be transmitted using the first PUCCH.

[0214] If conditions 1 and 2 are met and the second UCI (e.g., combined UCI) bits are transmitted using the second PUCCH resource, the UE may also configure the first UCI closer to the reference signal (e.g., DMRS) than the second UCI. Furthermore, the UE may also control the configuration of the first UCI in an earlier symbol in the time domain.

[0215] <Determination of Second PUCCH Resources>

[0216] When the second PUCCH is used to transmit the first and second UCI bits (e.g., in combination with the UCI bits), the UE may also determine the second PUCCH resource using at least one of Option A-1 and Option A-2 shown in the first approach. Furthermore, in Option A-1 and Option A-2 shown in the first approach, the first PUCCH may be replaced with the second PUCCH.

[0217] <Decisions / Adjustments Regarding UCI Bits>

[0218] When the second PUCCH is used to transmit the first and second UCI bits (e.g., combined UCI bits), the UE may determine / adjust the number of combined UCI bits (e.g., at least the second UCI bits) using at least one of Option B-1 and Option B-2 shown in the first approach. Even when the second PUCCH resource is used, the combined UCI bits may be determined by limiting / adjusting (e.g., bundling) the lower-priority second UCI bits, similar to the first approach.

[0219] Coding with UCI bits

[0220] When the second PUCCH resource is used to transmit the first UCI bit and the second UCI bit (eg, a combined bit), the UE may also apply the joint encoding or separate encoding shown in the first approach.

[0221] (change)

[0222] When the first UL transmission and the second UL transmission with different priorities overlap in the time domain, the UE may also determine whether to apply the control method shown in the first to third embodiments based on specific conditions / specific information.

[0223] For example, when specific higher-layer signaling is notified / configured, the UE may also control the multiplexing of the first UCI and the second UCI using at least one of the UL control information shown in the first and third methods. For example, when specific higher-layer signaling is notified / configured, the UE controls the transmission of the first UCI and the second UCI (e.g., combined UCI) bits using specific PUCCH resources. In other cases, the UE may also control the transmission of the first UCI using the first PUCCH and the discarding of the second UCI (or the second PUCCH).

[0224] Whether to allow / support the transmission of the first UCI and the second UCI using specific PUCCH resources may be set separately for each combination / set of the first PUCCH format (PF#x) and the second PUCCH format (PF#y). Alternatively, whether to allow / support the transmission of the first UCI and the second UCI using specific PUCCH resources may be set commonly regardless of the combination / set of the first PUCCH format (PF#x) and the second PUCCH format (PF#y).

[0225] Alternatively, whether multiplexing of the first and second UCIs (e.g., combined UCI transmission) is permitted / supported may be dynamically indicated to the UE using DCI. The UE may also determine whether to transmit combined UCI based on the value of a specific field included in the DCI corresponding to each UCI (e.g., HARQ-ACK). In this case, the value of the specific field in the DCI corresponding to each HARQ-ACK fed back at the same timing (or included in the same HARQ feedback window) may be set to the same.

[0226] Furthermore, whether dynamic notification of support for multiplexing of the first and second UCI (e.g., combined transmission of UCI) is supported may also be indicated to the UE via higher-layer signaling / DCI. For example, if specific higher-layer signaling (e.g., higher-layer signaling indicating dynamic multiplexing) is configured, the UE may determine that a specific field indicating dynamic multiplexing is configured / present in the DCI. On the other hand, if specific higher-layer signaling is not configured / notified, the UE may assume that the specific field is not included in the DCI.

[0227] The UE may also be defined with UE capability information (UE capability) indicating whether the UE supports multiplexing (eg, combining transmission of the UCI) of the first UCI and the second UCI that are semi-statically / dynamically configured.

[0228] In this case, UE capability information indicating whether multiplexing of the first UCI and the second UCI (e.g., combined transmission of UCI) is supported may be defined separately for each combination / set of the first PUCCH format (PF#x) and the second PUCCH format (PF#y). Alternatively, UE capability information indicating whether multiplexing of the first UCI and the second UCI (e.g., combined transmission of UCI) is supported may be commonly defined regardless of the combination / set of the first PUCCH format (PF#x) and the second PUCCH format (PF#y).

[0229] (Wireless Communication System)

[0230] The following describes a configuration of a wireless communication system according to an embodiment of the present disclosure. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof.

[0231] Figure 16 This figure shows an example of a schematic configuration of a wireless communication system according to one embodiment. The wireless communication system 1 may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5G NR), or the like.

[0232] In addition, the wireless communication system 1 can also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC can also 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 (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0233] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0234] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0235] The wireless communication system 1 may also include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) that are deployed within the macrocell C1 and form small cells C2 that are narrower than the macrocell C1. User terminals 20 may also be located within at least one of the cells. The configuration and number of cells and user terminals 20 are not limited to those shown in the figure. Hereinafter, when not distinguishing between base stations 11 and 12, they are collectively referred to as base stations 10.

[0236] 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).

[0237] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (below 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to these. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0238] 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.

[0239] Multiple base stations 10 can also be connected by wired (for example, optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (for example, NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 equivalent to the upper station can also be called an integrated access backhaul (IAB) donor, and the base station 12 equivalent to the relay station (relay) can also be called an IAB node.

[0240] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0241] The user terminal 20 may also be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0242] In the wireless communication system 1, a radio access scheme based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), or single carrier frequency division multiple access (SC-FDMA) may be used.

[0243] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0244] As downlink channels, the wireless communication system 1 may use a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20), a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc.

[0245] In addition, as uplink channels, the wireless communication system 1 can also use an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20), an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc.

[0246] User data, higher-layer control information, and system information blocks (SIBs) are transmitted via the PDSCH. User data, higher-layer control information, and the like can also be transmitted via the PUSCH. Furthermore, the Master Information Block (MIB) can also be transmitted via the PBCH.

[0247] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information for at least one of the PDSCH and the PUSCH.

[0248] In addition, the DCI that schedules the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be replaced by DL data, and the PUSCH may also be replaced by UL data.

[0249] In PDCCH detection, a control resource set (CORESET) and a search space can also be used. A CORESET corresponds to the resources for searching for DCI. A search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space settings.

[0250] A search space may also correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in this disclosure may be used interchangeably.

[0251] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also known as hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR) can also be transmitted via the PUCCH. The random access preamble used to establish a connection with a cell can also be transmitted via the PRACH.

[0252] In the present disclosure, downlink, uplink, etc. may be expressed without the word "link." Furthermore, various channels may be expressed without the word "physical" at the beginning.

[0253] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. can also be transmitted. As DL-RS, in the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. can also be transmitted.

[0254] For example, a synchronization signal may be at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SSs (PSS, SSS) and PBCHs (and DMRS for PBCHs) may also be referred to as an SS / PBCH block or an SS block (SSB). Furthermore, SSs and SSBs may also be referred to as reference signals.

[0255] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0256] (Base Station)

[0257] Figure 17 This figure shows an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface (transmission line interface) 140. Furthermore, more than one of each of the control unit 110, the transmitting / receiving unit 120, the transmitting / receiving antenna 130, and the transmission path interface 140 may be provided.

[0258] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0259] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which this disclosure relates.

[0260] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. It may also control transmission and reception, measurement, etc., using the transmission and reception unit 120, the transmission and reception antennas 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting up, releasing, etc.) of communication channels, manage the status of the base station 10, manage radio resources, etc.

[0261] The transceiver unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transceiver circuit, and the like, which are described based on common knowledge in the technical fields involved in this disclosure.

[0262] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0263] The transmitting and receiving antenna 130 can be formed of an antenna described based on common knowledge in the technical field to which this disclosure relates, such as an array antenna.

[0264] The transmitting and receiving unit 120 may also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the aforementioned uplink channel, uplink reference signal, etc.

[0265] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmit beam and a receive beam.

[0266] The sending and receiving unit 120 (sending processing unit 1211) can also perform processing on the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (for example, RLC retransmission control), the Medium Access Control (MAC) layer (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 110 to generate a bit string to be sent.

[0267] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0268] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0269] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 130 .

[0270] The transmitting and receiving unit 120 (receiving processing unit 1212) can also apply receiving processing such as analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0271] The transmitting and receiving unit 120 (measuring unit 123) may also perform measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (SINR), signal to noise ratio (SNR)), signal strength (e.g., received signal strength indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0272] The transmission path interface 140 can also send and receive signals (return signaling) between the devices included in the core network 30, other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0273] In addition, the transmitting unit and the receiving unit of the base station 10 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 120 , the transmitting and receiving antenna 130 , and the transmission path interface 140 .

[0274] The transmitting and receiving unit 120 may also transmit information related to the priority corresponding to the uplink control channel.

[0275] When a plurality of uplink control channels with different priorities overlap in the time domain, the control unit 110 may control the terminal to receive uplink control information transmitted using a specific uplink control channel selected based on the format of each uplink control channel.

[0276] (User Terminal)

[0277] Figure 18This figure shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Furthermore, more than one of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided.

[0278] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0279] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which this disclosure relates.

[0280] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission, reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals and forward them to the transmission and reception unit 220.

[0281] The transceiver unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, and the like, which are described based on common knowledge in the technical fields involved in this disclosure.

[0282] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit or may be composed of a transmitting unit and a receiving unit. The transmitting unit may also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0283] The transmitting and receiving antenna 230 can be formed of an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0284] The transmitting and receiving unit 220 may also receive the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the aforementioned uplink channel, uplink reference signal, etc.

[0285] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0286] The sending and receiving unit 220 (sending processing unit 2211) can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0287] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0288] In addition, whether or not to apply DFT processing may also be based on the transform precoding setting. For a certain channel (e.g., PUSCH), if transform precoding is valid (enabled), the transmitting / receiving unit 220 (transmitting processing unit 2211) may perform DFT processing as the aforementioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting / receiving unit 220 (transmitting processing unit 2211) may perform DFT processing as the aforementioned transmission processing without performing DFT processing.

[0289] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0290] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 230 .

[0291] The transmitting and receiving unit 220 (receiving processing unit 2212) can also apply receiving processing such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0292] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to received signals. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signals. The measuring unit 223 may also 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 also be output to the control unit 210.

[0293] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0294] The transmitting and receiving unit 220 may also receive information related to the priority corresponding to the uplink control channel.

[0295] When multiple uplink control channels with different priorities overlap in the time domain, the control unit 210 can also determine whether the uplink control information corresponding to each uplink control channel is sent, and the uplink control channel used in the transmission of the uplink control information corresponding to each uplink control channel based on the format of each uplink control channel.

[0296] When multiple uplink control channels include a first uplink control channel and a second uplink control channel with a lower priority than the first uplink control channel, and the format of the first uplink control channel is above a specific value, the control unit 210 may also control so that the first uplink control channel is used to send uplink control information corresponding to the second uplink control channel.

[0297] When multiple uplink control channels include a first uplink control channel and a second uplink control channel with a lower priority than the first uplink control channel, and the formats of the first uplink control channel and the second uplink control channel are smaller than a specific value, the control unit 210 may also control so as to utilize cyclic shift to transmit the uplink control information corresponding to the first uplink control channel or the uplink control information corresponding to the second uplink control channel.

[0298] When multiple uplink control channels include a first uplink control channel and a second uplink control channel with a lower priority than the first uplink control channel, and the format of the first uplink control channel is smaller than a specific value, and the format of the second uplink control channel is greater than the specific value, the control unit 210 may also control so that the second uplink control channel is used to send uplink control information corresponding to the first uplink control channel.

[0299] (Hardware Structure)

[0300] In addition, the block diagrams used in the description of the above embodiments show blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly (for example, by wired, wireless, etc.) connected and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0301] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, resolving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any of them are as described above, and the implementation method is not particularly limited.

[0302] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 19 This figure shows an example of the hardware configuration of a base station and a user terminal according to one embodiment. The base station 10 and user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[0303] In addition, in this disclosure, the terms such as device, circuit, equipment, section, and unit are interchangeable. The hardware structure of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or may not include some of the devices.

[0304] For example, although only one processor 1001 is shown, multiple processors may be provided. Furthermore, processing may be performed by a single processor, or by two or more processors simultaneously, sequentially, or using other methods. Furthermore, processor 1001 may be implemented using more than one chip.

[0305] Regarding the various functions in the base station 10 and the user terminal 20, for example, they are achieved by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0306] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a computing device, registers, etc. For example, at least a portion of the control unit 110 (210) and the transmitting and receiving unit 120 (220) described above may also be implemented by the processor 1001.

[0307] In addition, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and performs various processes based on them. As a program, a program that causes a computer to perform at least a portion of the operations described in the above embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks can also be implemented similarly.

[0308] The memory 1002 may also be a computer-readable recording medium, for example, comprised of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 may store executable programs (program code), software modules, etc., for implementing the wireless communication method according to an embodiment of the present disclosure.

[0309] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, or a key drive), a magnetic stripe, a database, a server, or other suitable storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0310] The communication device 1004 is hardware (a transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. To implement at least one of frequency division duplex (FDD) and time division duplex (TDD), the communication device 1004 may also include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like. For example, the aforementioned transmitting and receiving unit 120 (220), transmitting and receiving antenna 130 (230), and the like may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be implemented by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0311] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to the outside (e.g., a display, speaker, light emitting diode (LED) lamp, etc.). Alternatively, the input device 1005 and the output device 1006 may be integrated (e.g., a touch panel).

[0312] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0313] Furthermore, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and may use such hardware to implement part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware components.

[0314] (Variation)

[0315] In addition, the terms described in this disclosure and the terms required for understanding this disclosure may also be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be replaced with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, or may be referred to as a pilot, pilot signal, etc. depending on the applied standard. In addition, a component carrier (CC) may also be referred to as a cell, frequency carrier, carrier frequency, etc.

[0316] A radio frame can also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) that constitute a radio frame can also be called a subframe. Furthermore, a subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) that is independent of the parameter set (numerology).

[0317] Here, a parameter set may also refer to communication parameters applied to at least one of the transmission and reception of a signal or channel. For example, a parameter set may also represent at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, and the like.

[0318] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0319] A time slot may also contain multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. Furthermore, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as PDSCH (PUSCH) mapping type B.

[0320] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units used for signal transmission. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective equivalents. Furthermore, the terms frame, subframe, time slot, mini-time slot, and symbol may be used interchangeably in this disclosure.

[0321] For example, a subframe can be called a TTI, multiple consecutive subframes can be called a TTI, and a slot or a mini-slot can be called a TTI. That is, at least one of a subframe and a TTI can be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. Furthermore, the unit representing a TTI can be called a slot, a mini-slot, or the like, rather than a subframe.

[0322] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communications. For example, in the LTE system, a base station schedules each user terminal by allocating radio resources (such as the frequency bandwidth and transmit power available to each user terminal) in TTI units. The definition of TTI is not limited to this.

[0323] The TTI may also be a unit of time for transmitting channel-coded data packets (transport blocks), code blocks, code words, etc., and may also be a unit of processing for scheduling, link adaptation, etc. Furthermore, when a TTI is given, the time interval (e.g., the number of symbols) to which the transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.

[0324] In addition, when a time slot or a mini-time slot is called a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-time slots) can also be the minimum time unit of scheduling. In addition, the number of time slots (mini-time slots) that constitute the minimum time unit of scheduling can also be controlled.

[0325] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini-slot, a subslot, a time slot, etc.

[0326] In addition, long TTI (for example, normal TTI, subframe, etc.) can also be replaced by TTI with a time length exceeding 1ms, and short TTI (for example, shortened TTI, etc.) can also be replaced by TTI with a TTI length smaller than long TTI and greater than 1ms.

[0327] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it may also include one or more consecutive subcarriers (subcarriers). The number of subcarriers included in an RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0328] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks.

[0329] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0330] 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.

[0331] A Bandwidth Part (BWP) (also referred to as a fractional bandwidth) can also represent a subset of contiguous common resource blocks (RBs) used for a particular parameter set within a particular carrier. Common RBs can also be identified by their index relative to the common reference point of the carrier. PRBs can also be defined within a BWP and numbered within that BWP.

[0332] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured within one carrier.

[0333] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive specific signals / channels outside of the activated BWP. In addition, the terms "cell," "carrier," and the like in this disclosure may be replaced with "BWP."

[0334] The above-mentioned structures of radio frames, subframes, slots, mini-slots, and symbols are merely examples. For example, various modifications may be made to the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots within a slot, the number of symbols and RBs within a slot or mini-slot, the number of subcarriers within an RB, the number of symbols within a TTI, the symbol length, and the cyclic prefix (CP) length.

[0335] Furthermore, the information and parameters described in this disclosure may be expressed as absolute values, relative values relative to a specific value, or other corresponding information. For example, wireless resources may be indicated by specific indexes.

[0336] The names used for parameters, etc. in this disclosure are not intended to be limiting in any respect. Furthermore, the mathematical formulas for these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not intended to be limiting in any respect.

[0337] Information, signals, and the like described in this disclosure may also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like that may be referred to throughout the foregoing description may also be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0338] Furthermore, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0339] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or appended. Output information, signals, etc. may also be deleted. Input information, signals, etc. may also be sent to other devices.

[0340] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI))), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC)) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0341] In addition, physical layer signaling may also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as RRC message, for example, RRC Connection Setup message, RRC Connection Reconfiguration message, etc. In addition, MAC signaling may also be notified using MAC Control Element (CE), for example.

[0342] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0343] The determination can be made by a value represented by a bit (0 or 1), a true or false value (Boolean value) represented by true (true) or false (false), or by comparing numerical values (for example, comparing with a specific value).

[0344] The term “software” or “firmware” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, sub-programs, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, or the like.

[0345] Furthermore, software, instructions, information, and the like may also be transmitted and received via a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and a wireless technology (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0346] The terms "system" and "network" used in this disclosure can be used interchangeably. "Network" may also refer to devices included in the network (eg, base stations).

[0347] 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", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" can be used interchangeably.

[0348] In this disclosure, terms such as "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP))", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" are used interchangeably. In some cases, a base station may be referred to as a macro cell, small cell, femto cell, or pico cell.

[0349] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of the base station can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entire coverage area of at least one of a base station and a base station subsystem that provides communication services within that coverage area.

[0350] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (UE)”, and “terminal” can be used interchangeably.

[0351] The mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client, or several other appropriate terms.

[0352] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Furthermore, at least one of the base station and the mobile station may also be a device mounted on a mobile object, a mobile object itself, etc. The mobile object may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile object that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0353] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by communication between multiple user terminals (for example, which may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be configured such that the user terminal 20 has the functions of the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0354] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0355] In the present disclosure, actions are assumed to be performed by a base station, and sometimes, depending on the circumstances, by its upper node. Obviously, in a network including one or more network nodes including 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 (for example, a Mobility Management Entity (MME)), a Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0356] The various methods / implementations described in this disclosure may be used individually or in combination, and may be switched between them during execution. Furthermore, the processing procedures, sequences, flow charts, and the like of the various methods / implementations described in this disclosure may be reversed as long as they do not conflict. For example, the elements of various steps described in this disclosure are presented in an illustrative order, but are not limited to the specific order presented.

[0357] The various modes and embodiments described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future Generation Radio Access (FX), Global System for Mobile Communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB)), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems based on these. In addition, multiple systems can also be combined for application (for example, LTE or LTE-A, combined with 5G, etc.).

[0358] The phrase “based on” used in this disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on.”

[0359] Any reference to an element using the designations "first," "second," etc., as used in this disclosure, does not necessarily define the quantity or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to a first and a second element does not imply that only two elements may be used or that the first element must in some way take precedence over the second element.

[0360] The term "determining" as used in this disclosure may encompass a variety of actions. For example, "determining" may also include judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), ascertaining, etc. as performing a "determination."

[0361] In addition, "judgment (decision)" can also be a situation where receiving (for example, receiving information), transmitting (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. are regarded as making a "judgment (decision)".

[0362] Furthermore, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, comparing, etc. can be considered as "judgment (decision)". In other words, "judgment (decision)" can also refer to situations where certain actions can be considered as "judgment (decision)".

[0363] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and so on.

[0364] The "maximum transmit power" recorded in this disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0365] 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 the two elements being "connected" or "coupled." The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be replaced by "access."

[0366] In the present disclosure, when two elements are connected, it is possible to consider using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples to be "connected" or "combined" with each other.

[0367] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other." Alternatively, the term may also mean "A and B are each different from C." Terms such as "separate" and "bound" may also be interpreted in the same way as "different."

[0368] When used in this disclosure, "include," "including," and variations thereof have the same inclusive meaning as the term "comprising." Furthermore, the term "or" used in this disclosure does not mean an exclusive or.

[0369] In the present disclosure, when an article is added by translation, such as a, an, and the in English, the present disclosure may also include a case where the noun following the article is in a plural form.

[0370] While the inventions disclosed herein have been described in detail above, it will be apparent to those skilled in the art that the inventions disclosed herein are not limited to the embodiments described herein. The inventions disclosed herein can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the claims. Therefore, the descriptions in this disclosure are for illustrative purposes only and are not intended to limit the inventions disclosed herein in any way.

Claims

1. A terminal comprising: a control unit, when a first physical uplink control channel (i.e., a first PUCCH) and a second physical uplink control channel (i.e., a second PUCCH) having a higher priority than the first PUCCH overlap in the time domain, controlling to encode bits of a first hybrid automatic repeat request acknowledgment (i.e., a first HARQ-ACK) corresponding to the first PUCCH and bits of a second hybrid automatic repeat request acknowledgment (i.e., a second HARQ-ACK) corresponding to the second PUCCH, respectively; and a sending unit, using the second PUCCH to send the first HARQ-ACK and the second HARQ-ACK, The control unit controls to encode the first HARQ-ACK at a first coding rate and to encode the second HARQ-ACK at a second coding rate lower than the first coding rate, The control unit determines a PUCCH resource used for transmitting the second PUCCH based on the total number of bits of the first HARQ-ACK and the second HARQ-ACK.

2. A wireless communication method for a terminal, comprising: In a case where a first physical uplink control channel (i.e., a first PUCCH) and a second physical uplink control channel (i.e., a second PUCCH) having a higher priority than the first PUCCH overlap in the time domain, controlling to separately encode bits of a first hybrid automatic repeat request acknowledgment (i.e., a first HARQ-ACK) corresponding to the first PUCCH and bits of a second hybrid automatic repeat request acknowledgment (i.e., a second HARQ-ACK) corresponding to the second PUCCH; a step of controlling to encode the first HARQ-ACK at a first coding rate and to encode the second HARQ-ACK at a second coding rate lower than the first coding rate; A step of determining, based on a total number of bits of the first HARQ-ACK and the second HARQ-ACK, a PUCCH resource used for transmitting the second PUCCH; as well as The step of using the second PUCCH to send the first HARQ-ACK and the second HARQ-ACK.

3. A base station comprising: a control unit that determines that, when a first physical uplink control channel (i.e., a first PUCCH) and a second physical uplink control channel (i.e., a second PUCCH) having a higher priority than the first PUCCH overlap in the time domain, bits of a first hybrid automatic repeat request acknowledgment (i.e., a first HARQ-ACK) corresponding to the first PUCCH and bits of a second hybrid automatic repeat request acknowledgment (i.e., a second HARQ-ACK) corresponding to the second PUCCH are separately encoded; and a receiving unit, using the second PUCCH to receive the first HARQ-ACK and the second HARQ-ACK, The control unit determines that the first HARQ-ACK is encoded at a first coding rate, and the second HARQ-ACK is encoded at a second coding rate lower than the first coding rate, The control unit determines that a PUCCH resource used for transmission of the second PUCCH is determined based on the total number of bits of the first HARQ-ACK and the second HARQ-ACK.

4. A system having a terminal and a base station, The terminal has: a control unit, when a first physical uplink control channel (i.e., a first PUCCH) and a second physical uplink control channel (i.e., a second PUCCH) having a higher priority than the first PUCCH overlap in the time domain, controlling to encode bits of a first hybrid automatic repeat request acknowledgment (i.e., a first HARQ-ACK) corresponding to the first PUCCH and bits of a second hybrid automatic repeat request acknowledgment (i.e., a second HARQ-ACK) corresponding to the second PUCCH, respectively; and a sending unit, using the second PUCCH to send the first HARQ-ACK and the second HARQ-ACK, The base station has: a receiving unit, using the second PUCCH to receive the first HARQ-ACK and the second HARQ-ACK, The control unit controls to encode the first HARQ-ACK at a first coding rate and to encode the second HARQ-ACK at a second coding rate lower than the first coding rate, The control unit of the terminal determines a PUCCH resource used for transmitting the second PUCCH based on the total number of bits of the first HARQ-ACK and the second HARQ-ACK.

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