Terminal and wireless communication method

Abstract

One embodiment of the terminal disclosed in the present invention comprises: a control unit, which selects uplink control channel resources included in a specific uplink control channel resource set when a first uplink control channel resource corresponding to a first type of uplink control information conflicts with a second uplink control channel resource corresponding to a second type of second uplink control information; and a sending unit, which sends the first uplink control information and the second uplink control information using the selected uplink control channel resource.

Description

Technical Field

[0001] The present disclosure relates to a terminal and a wireless communication method 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] In existing LTE systems (e.g., LTE Rel. 8-14), user terminals (User Equipment (UE)) control the reception of downlink shared channels (e.g., the Physical Downlink Shared Channel (PDSCH)) based on downlink control information (also known as Downlink Control Information (DCI)), DL allocations, etc.) transmitted via downlink control channels (e.g., the Physical Downlink Control Channel (PDCCH)). Furthermore, the UE controls the transmission of uplink shared channels (e.g., the Physical Uplink Shared Channel (PUSCH)) based on DCI (also known as UL grants, etc.).

[0005] Prior art literature

[0006] Non-patent literature

[0007] 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

[0008] Problems to be solved by the invention

[0009] In future wireless communication systems (e.g., 5G, NR, etc.), it is envisioned that multiple business types (also called services, types, service types, communication types, or use cases, etc.) with different requirements (requirements) will coexist, such as high speed and large capacity (e.g., enhanced mobile broadband (eMBB)), a large number of terminals (e.g., massive Machine Type Communication (mMTC), Internet of Things (IoT)), ultra-reliability and low latency (e.g., Ultra Reliable and Low Latency Communications (URLLC)), etc.).

[0010] When a UE supports (or utilizes) multiple service types, it is assumed that conflicts may occur between multiple uplink transmissions associated with different service types. However, it is unclear how to handle such multiple uplink transmissions. If this is not handled clearly, there is a concern that the requirements of a specific service type may not be met, leading to system performance degradation.

[0011] The present invention has been made in view of such circumstances, and one of its objects is to provide a terminal and a wireless communication method that can perform appropriate communication even when a plurality of uplink transmissions respectively associated with different traffic types collide.

[0012] Means for solving problems

[0013] A terminal involved in one embodiment of the present disclosure is characterized in that it comprises: a control unit for selecting uplink control channel resources included in a specific uplink control channel resource set when a first uplink control channel resource corresponding to a first type of uplink control information conflicts with a second uplink control channel resource corresponding to a second type of second uplink control information; and a sending unit for sending the first uplink control information and the second uplink control information using the selected uplink control channel resource.

[0014] Effects of the Invention

[0015] According to one aspect of the present disclosure, even when a plurality of uplink transmissions respectively associated with different traffic types collide, communication can be performed appropriately. 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 4 This is a diagram showing an example of a situation where PUCCHs corresponding to different transmission types collide.

[0020] Figure 5 This is a diagram showing an example of a PUCCH resource set and a method of selecting a PUCCH resource.

[0021] Figure 6 This is a diagram showing another example of a PUCCH resource set and a method of selecting a PUCCH resource.

[0022] Figure 7 This is a diagram showing another example of a PUCCH resource set and a method of selecting a PUCCH resource.

[0023] Figure 8 This is a diagram showing another example of a PUCCH resource set and a method of selecting a PUCCH resource.

[0024] Figure 9 This is a diagram showing another example of a PUCCH resource set and a method of selecting a PUCCH resource.

[0025] Figure 10 This is a diagram showing another example of a PUCCH resource set and a method of selecting a PUCCH resource.

[0026] Figure 11 This is a diagram showing another example of a PUCCH resource set and a method of selecting a PUCCH resource.

[0027] Figure 12 This is a diagram showing an example of a schematic configuration of a wireless communication system according to one embodiment.

[0028] Figure 13 This is a diagram showing an example of the configuration of a base station according to one embodiment.

[0029] Figure 14 This is a diagram showing an example of the configuration of a user terminal according to one embodiment.

[0030] Figure 15 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

[0031] <Service (Business Type)>

[0032] Future wireless communication systems (e.g., NR) envision further advancements in mobile broadband (e.g., enhanced mobile broadband (eMBB)), machine-type communications enabling 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 types, services, service types, communication types, use cases, and the like) are envisioned. For example, URLLC requires lower latency and higher reliability than eMBB.

[0033] The service type can also be identified in the physical layer based on at least one of the following.

[0034] Logical channels with different priorities

[0035] Modulation and Coding Scheme (MCS) table (MCS index table)

[0036] Channel Quality Indication (CQI) table

[0037] DCI format

[0038] Radio Network Temporary Identifier (RNTI: System Information - Radio Network Temporary Identifier) ​​used for scrambling (masking) of the CRC (Cyclic Redundancy Check) bits included (added) in the DCI (DCI format)

[0039] RRC (Radio Resource Control) parameters

[0040] Specific RNTI (e.g., RNTI for URLLC, MCS-C-RNTI, etc.)

[0041] Search space

[0042] Specific fields within the DCI (e.g., newly added fields or reuse of existing fields)

[0043] Specifically, the service type of HARQ-ACK (or PUCCH) for PDSCH can also be determined based on at least one of the following.

[0044] 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)

[0045] The RNTI used for CRC scrambling of the DCI used for scheduling the PDSCH (e.g., whether the CRC is scrambled by the C-RNTI or the MCS-C-RNTI)

[0046] Priority set via higher-layer signaling

[0047] 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.

[0048] The difference between the requirements of URLLC and eMBB may be that the latency of URLLC is smaller than the latency of eMBB, or that the requirements of URLLC include reliability requirements.

[0049] For example, the requirements for the user (U) plane delay of eMBB may also include a downlink U plane delay of 4 ms and an uplink U plane delay of 4 ms. On the other hand, the requirements for the U plane delay of URLLC may also include a downlink U plane delay of 0.5 ms and an uplink U plane delay of 0.5 ms. In addition, the requirements for the reliability of URLLC may also include an error rate of 10 for 32 bytes in a U plane delay of 1 ms -5 .

[0050] In addition, as enhanced Ultra Reliable and Low Latency Communications (eURLLC), the main focus is on improving the reliability of services for unicast data. Hereinafter, without distinguishing between URLLC and eURLLC, it is simply referred to as URLLC.

[0051] <PUCCH resource>

[0052] In existing wireless communication systems (e.g., Rel.15), based on information notified separately through DCI and high-layer signaling, the PUCCH resources used for the transmission of HARQ-ACK for DL transmission (e.g., PDSCH) are determined. For example, the UE can also use the following steps 1 to 3 to determine the PUCCH resources used for the transmission of HARQ-ACK. In addition, the order of steps 1 - 3 can also be reversed.

[0053] [Step 1]

[0054] In Step 1, the UE or terminal (hereinafter, also simply referred to as UE) determines the feedback timing (K1) of HARQ-ACK. K1 corresponds to the period (e.g., time slot) from the reception of DL transmission (e.g., PDSCH) to the transmission of HARQ-ACK for that DL transmission. Information related to the HARQ-ACK timing (K1) may also be included in the DCI used in the scheduling of PDSCH.

[0055] The network (e.g., base station) can also use a specific field of the DCI (or PDCCH) that schedules the PDSCH to notify K1 to the UE. For example, the bit value specified by the specific field of the DCI can 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 can be associated with a value set through high-layer signaling.

[0056] When the UE receives the DCI that schedules the PDSCH, it determines the timing of feeding back the HARQ-ACK for the PDSCH based on the information included in the DCI (see Figure 1 ).exist Figure 1 In the example, the UE receives the PDSCH scheduled in slot #n based on the DCI sent in slot #n. Furthermore, the UE transmits HARQ-ACK using the PUCCH resources configured in slot #n+1 based on the HARQ-ACK feedback timing information included in the DCI (here, K1=1).

[0057] [Step 2]

[0058] In step 2, the UE determines the PUCCH resource set to be used in the time slot in which the HARQ-ACK is transmitted.

[0059] For a UE, one or more PUCCH resource sets are notified (or configured) via higher layer signaling. A PUCCH resource set may also include more than one PUCCH resource. For example, a UE may also be notified of K (e.g., 1 ≤ K ≤ 4) PUCCH resource sets from a base station. Each PUCCH resource set may also include M (e.g., 8 ≤ M ≤ 32 or 1 ≤ M ≤ 8) PUCCH resources.

[0060] The UE may also determine a single PUCCH resource set from the configured K PUCCH resource sets based on the UCI payload size. The UCI payload size may also be the number of UCI bits excluding cyclic redundancy check (CRC) bits.

[0061] Figure 2 FIG is a diagram showing an example of allocation of PUCCH resources. Figure 2 As an example, assume that K = 4, and four PUCCH resource sets #0-#3 are configured from the base station to the UE via higher-layer signaling. Furthermore, assume that PUCCH resource sets #0-#3 each include M (e.g., 8 ≤ M ≤ 32) PUCCH resources #0-#M-1. Furthermore, the number of PUCCH resources included in each PUCCH resource set can be the same or different.

[0062] exist Figure 2 In the

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

[0063] The symbol at which PUCCH allocation starts (start symbol)

[0064] The number of symbols allocated to the PUCCH in a slot (the period allocated to the PUCCH)

[0065] The index of the resource block (Physical Resource Block (PRB)) where PUCCH allocation starts

[0066] The number of PRBs allocated to PUCCH

[0067] Whether to activate frequency hopping for PUCCH

[0068] The frequency resource of the second hop and the index of the initial cyclic shift (CS) when frequency hopping is activated

[0069] The index of an orthogonal spreading code in the time domain (e.g., an orthogonal cover code (OCC)), the length of the OCC used for block spreading before discrete Fourier transform (DFT) (also called OCC length, spreading factor, etc.)

[0070] The index of the OCC used for block-wise spreading after DFT

[0071] like Figure 2 As shown, when PUCCH resource sets #0 to #3 are configured for a UE, the UE selects any one of the PUCCH resource sets based on the UCI payload size.

[0072] 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 larger and N2-1 bits or smaller, PUCCH resource set #1 is selected. Furthermore, when the UCI payload size is N2 bits or larger and N3-1 bits or smaller, PUCCH resource set #2 is selected. Similarly, when the UCI payload size is N3 bits or larger and N4-1 bits or smaller, PUCCH resource set #3 is selected.

[0073] Thus, the range of UCI payload size selected by PUCCH resource set #i (i=0, ..., K-1) is expressed as N i More than 1 bit and N i+1 -1 bit or less (ie, {N i ,…,N i+1 -1} bits).

[0074] Here, the starting position (starting bit number) N0 and N1 of the UCI payload size for 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, 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.

[0075] 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 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 by higher layer signaling (eg, user-specific RRC signaling).

[0076] The maximum payload size of the UCI of each PUCCH resource set is determined by N K -1 provided. N K It can be notified (set) to the UE in an explicit manner through higher layer signaling and / or DCI, or it can be derived in an implicit manner. Figure 2 In the example, N0=1 and N1=3 may be specified in the specification, and N2 and N3 may be notified via higher layer signaling. In addition, N4 may also be specified in the specification (for example, N4=1706).

[0077] 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).

[0078] [Step 3]

[0079] In step 3, the UE determines one PUCCH resource from one or more PUCCH resources included in the PUCCH resource set.

[0080] For example, the UE may also determine the PUCCH resources used for sending UCI from the M PUCCH resources included in the determined PUCCH resource set based on DCI and at least one of implicit information (also called implicit indication information or implicit index, etc.).

[0081] exist Figure 2 In the illustrated case, the user terminal can determine a single PUCCH resource for transmitting UCI based on the value of a specific field in the DCI from PUCCH resources #0 to #M-1 included in the PUCCH resource set selected based on the UCI payload size.

[0082] The number of PUCCH resources M in a PUCCH resource set can also be set to the user terminal through higher layer signaling (see 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.

[0083] However, in future wireless communication systems, it is envisioned that a single UE supports multiple service types (or communication services) and generates multiple UL transmissions associated with different service types. As an example, it is envisioned that the UE transmits both UCI (e.g., HARQ-ACK) corresponding to a first service type (hereinafter also referred to as the first type) and UCI (e.g., HARQ-ACK) corresponding to a second type. The second type may also correspond to a communication service with a lower priority (or permitted to be delayed) than the first type.

[0084] In this case, it is also assumed that at least one of the PUCCH resource set and the HARQ-ACK codebook is configured separately (for example, differently) for each HARQ-ACK corresponding to each service.

[0085] On the other hand, it is also assumed that different types of UL channels or UL transmission periods overlap (see Figure 4 ).exist Figure 4 , shows a situation where the PUCCH (or PUCCH resources) of HARQ-ACK configured for the first type (e.g., for URLLC) and the PUCCH (or PUCCH resources) of HARQ-ACK configured for the second type (e.g., for eMBB) overlap in a part of the time domain.

[0086] However, a problem arises in how to control the collision of two UL transmissions associated with different traffic types.

[0087] For example, it is also assumed that the UE multiplexes or maps (hereinafter referred to as "multiplexing") the first type of HARQ-ACK and the second type of HARQ-ACK to the same PUCCH resource for transmission. However, in such a case, how to determine the PUCCH resources for HARQ-ACKs of different multiplexing types becomes a problem.

[0088] Therefore, the inventors of the present invention studied conflict handling of UL transmissions associated with different service types and completed the invention of this application.

[0089] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Each embodiment can be applied independently or in combination.

[0090] In the present disclosure, a service type may also represent one of multiple candidates including at least one of URLLC, eURLLC, eMBB, mMTC, IoT, and Industrial Internet of Things (IIoT). In the present disclosure, a first type, a first service type, a high-priority service type, URLLC, and eURLLC may be interchangeable. A second type, a second service type, a low-priority service type, and eMBB may also be interchangeable. The priority of the second service type may also be lower than that of the first service type.

[0091] In the present disclosure, UL (uplink) information, UL transmission, UCI, UCI bit, PUCCH, HARQ-ACK, HARQ-ACK information bit, SR, SR information bit, CSI, CSI bit, UL data, and PUSCH may be used interchangeably. UCI may also include at least one of HARQ-ACK, SR, and CSI. Uplink resources, PUCCH resources, and PUSCH resources may also be used interchangeably.

[0092] In the present disclosure, the information type may represent one of multiple candidates including at least one of UCI, PUCCH, HARQ-ACK, SR, CSI, UL data, and PUSCH, and may also be replaced by the type of UCI or the type of channel.

[0093] In the present disclosure, the terms collision, contention, and overlap can also be used interchangeably. In the present disclosure, the terms discard, truncation, cancellation, and non-transmission can also be used interchangeably.

[0094] (First Method)

[0095] In the first method, when using the same PUCCH resources to send UCI (e.g., HARQ-ACK) corresponding to different types (e.g., first type and second type), the PUCCH resources are determined based on a PUCCH resource set set for a specific type.

[0096] When the PUCCH resources for the first type of UCI conflict with the PUCCH resources for the second type of UCI, the UE may also use the PUCCH resources included in a specific PUCCH resource set to control the transmission of the first type of UCI and the second type of UCI.

[0097] The specific PUCCH resource set may also be any one of one or more PUCCH resource sets configured for the first type and one or more PUCCH resource sets configured for the second type. For example, the UE determines the PUCCH resources based on a PUCCH resource set associated with a specific type among multiple types (e.g., the first type and the second type).

[0098] The specific type (or specific PUCCH resource set) may also be determined based on at least one of the following options 1-3.

[0099] <Option 1>

[0100] Information related to a specific type (or a specific PUCCH resource set) may also be notified or configured to the UE via higher-layer signaling. For example, the network (e.g., base station) may also configure the first type as the specific type. When the first type of UCI and the second type of UCI are multiplexed on the same PUCCH resource, the UE determines the PUCCH resource based on the PUCCH resource set configured for the first type. The second type may also be configured as the specific type.

[0101] <Option 2>

[0102] A specific type may also be set based on specific rules. For example, the specific type may be pre-defined in the specification. That is, when UCI of the first type and UCI of the second type are multiplexed on the same PUCCH resource, the UE may also select a PUCCH resource associated with a PUCCH resource set corresponding to a type (or service) pre-defined in the specification.

[0103] Alternatively, the specific type may be determined based on at least one of the payload (or total payload) of at least one of the first type of UCI and the second type of UCI, the PUCCH format, and the transmission length (or symbol length, PUCCH length).

[0104] For example, consider a scenario where a first type of UCI with a payload of 1-2 bits and a PUCCH format of PF0 or PF1 collides with a second type of UCI with a payload of 10 bits and a PUCCH format of PF2, PF3, or PF4. In such a case, the UE may also apply a PUCCH resource set configured for the second type with a larger payload (or corresponding to a PF with a larger capacity).

[0105] Alternatively, assuming that a first type of UCI with a 10-bit payload collides with a second type of UCI with a 1-2-bit payload, the UE may apply a PUCCH resource set configured for the first type with a large payload.

[0106] Alternatively, consider a scenario where a first type of UCI with a 10-bit payload and a PUCCH format of PF2 collides with a second type of UCI with a 10-bit payload and a PUCCH format of PF2, PF3, or PF4. In this case, the UE may also apply a PUCCH resource set configured for the first type with a specific PF (e.g., only PF2).

[0107] <Option 3>

[0108] A specific type or PUCCH resource set candidate may be determined based on a multiplexing rule. The multiplexing rule may be a value set for a payload boundary for each type of PUCCH resource set.

[0109] For example, from the PUCCH resource sets configured for each type, a PUCCH resource set corresponding to the sum of the first type UCI bits and the second type UCI bits is selected. A specific PUCCH resource set (or type) may also be determined based on the payload value configured for each selected PUCCH resource set type.

[0110] The UE may also use the PUCCH resources included in a specific PUCCH resource set to control the transmission of the first type of UCI and the second type of UCI. The payload value of the PUCCH resource set may also be the upper limit of the payload of the PUCCH resource set. For example, the UE may also select a PUCCH resource set (or the type corresponding to the PUCCH resource set) with a smaller upper limit of the payload in the PUCCH resource set corresponding to the total value of the first type of UCI payload and the second type of UCI payload.

[0111] Figure 5 This is a diagram showing an example of a method for determining PUCCH resources for multiplexing first-type UCI and second-type UCI when a PUCCH for first-type UCI collides with a PUCCH for second-type UCI.

[0112] Here, a scenario is shown where, when a PUCCH for the first type of UCI allocated in subslot units collides with a PUCCH for the second type of UCI allocated in slot units, the first and second types of UCI are allocated to a common PUCCH resource. Of course, the allocation units for the first and second types of PUCCHs are not limited to this.

[0113] In the following description, an example is given in which two PUCCH resource sets (e.g., Set #A0 and Set #A1) are configured for the first type, and two PUCCH resource sets (e.g., Set #B0 and Set #B1) are configured for the second type. The number of PUCCH resource sets configured for each type is not limited to two and can be one or three or more. Furthermore, the number of PUCCH resource sets configured for each type can also be different.

[0114] Here, it is assumed that the total of the first type UCI bits and the second type UCI bits is N (for example, 4 bits), and 0<set #A0≤2, 2<set #A1≤6, 0<set #B0≤2, 2<set #B1≤8.

[0115] When the total number of UCI bits for each type is 4, this total value falls within the range of set #A1 and set #B1. In this case, the upper limit of the payload for set #A1 (here, 6) can be compared with the upper limit of the payload for set #B1 (here, 8) to determine a specific PUCCH resource set (or a specific type).

[0116] For example, the UE may also select a PUCCH resource set with a low upper limit value of the payload (here, set #A1). Thereby, an increase in the overhead of the PUCCH used for transmitting the first type of UCI and the second type of UCI can be suppressed.

[0117] <Determination operation of PUCCH resources>

[0118] After the UE determines a specific type based on at least one of the above options 1 to 3 (for example, step 0), the UE selects one PUCCH resource set from one or more PUCCH resource sets set for the specific type (for example, step 1). In addition, the UE selects one PUCCH resource from one or more PUCCH resources included in the selected PUCCH resource set (for example, step 2). Additionally, in option 3, steps 0 and 1 may also be performed simultaneously.

[0119] [Step 1]

[0120] The UE may also determine the PUCCH resource set to be used based on the total value of the first type of UCI bits and the second type of UCI bits (total UCI payload). For example, in the case where the UCI is HARQ-ACK, the total value (N) of each type of UCI corresponds to the total value of the first type of HARQ-ACK bits (N type1_HARQ-ACK ) and the second type of HARQ-ACK bits (N type2_HARQ-ACK ) multiplexed on the same PUCCH resource.

[0121] The first type of HARQ-ACK bits (N<00000​​​​​​​​​​​​​​​​​​​The information notified via the DCI may also be the value of a specific field within the DCI (e.g., a PUCCH resource identifier (PUCCH resource indicator / indication (PRI)) field). Furthermore, one or more PUCCH resource candidates included in a PUCCH resource set may be configured from the base station to the UE via higher layer signaling.

[0125] Consider also the case where the UE detects the PRI in multiple (e.g., two) DCIs. For example, it is also assumed that the UE is notified of the PRI of the first type of HARQ-ACK for the first type of PDSCH via the DCI scheduling the first type of PDSCH, and is notified of the PRI of the second type of HARQ-ACK for the second type of PDSCH via the DCI scheduling the second type of PDSCH.

[0126] In this case, the UE may also determine the PRI to be applied based on a specific rule. For example, the UE may determine the PUCCH resources using the PRI notified via DCI associated with the type (or specific type) corresponding to the PUCCH resource set selected in step 0 or step 1 (first PRI determination method).

[0127] For example, assuming that a first type of HARQ-ACK and a second type of HARQ-ACK are multiplexed onto the same PUCCH resource, a PUCCH resource set associated with the first type is selected. In this case, the UE determines the PUCCH resource based on the PRI included in the DCI used to schedule the first type of PDSCH.

[0128] Similarly, assuming that the first type of HARQ-ACK and the second type of HARQ-ACK are multiplexed on the same PUCCH resource, a PUCCH resource set associated with the second type is selected. In this case, the UE determines the PUCCH resource based on the PRI included in the DCI used to schedule the second type of PDSCH.

[0129] Alternatively, the PRI (or DCI) used to determine the PUCCH resources may be defined in advance in the specification, or may be configured from the base station to the UE (second PRI determination method).

[0130] For example, it can also be set to a structure in which when multiplexing the HARQ-ACK of the first type and the HARQ-ACK of the second type to the same PUCCH resource, the PRI included in the DCI utilized in the scheduling of the PDSCH of the first type is always applied. Alternatively, it can also be set to a structure in which the PRI included in the DCI utilized in the scheduling of the PDSCH of the second type is always applied.

[0131] In this way, the DCI used for determining the PUCCH resource is associated with or predefined for the type of the PUCCH resource set, thereby enabling appropriate selection of the PUCCH resource.

[0132] <UE operation>

[0133] Figure 6 An example of the case where the UCI of the first type and the UCI of the second type are multiplexed to the same PUCCH resource is shown. In Figure 6 an example of the case (option 2) where a specific type among multiple types is preset is shown. In the following description, the case where the first type is the specific type is taken as an example for explanation.

[0134] In Figure 6 an example of the case where the PUCCH for the UCI of the first type allocated in sub-slot units conflicts with the PUCCH for the UCI of the second type allocated in slot units, the UCI of the first type and the UCI of the second type are allocated to a common PUCCH resource is shown. Here, an example of the case where two PUCCH resource sets (for example, set #A0, set #A1) are set for the first type and two PUCCH resource sets (for example, set #B0, set #B1) are set for the second type is shown. The number of set PUCCH resource sets, etc. is not limited to this.

[0135] The UE determines the type corresponding to the PUCCH resource set (step 0). Here, the PUCCH resource sets (set #A0, set #A1) set for the first type are selected.

[0136] Next, the UE selects one PUCCH resource set based on the total value (N) of the payloads of the UCI of the first type and the UCI of the second type (step 1). Here, the UE selects the PUCCH resource set corresponding to the total value (N) of the payloads among the PUCCH resource sets (set #A0, set #A1) selected in step 0.

[0137] For example, consider the case where N is 6 bits and 0 < set #A0 ≤ 2, 2 < set #A1 ≤ 8. In such a case, the UE selects set #A1 as the PUCCH resource set.

[0138] Next, the UE selects a specific PUCCH resource from the PUCCH resources included in the set #A1 based on the information notified via the DCI (step 2). Figure 6 , shows a case where PUCCH resources #0 to #7 are included in set #A1, and PUCCH resource #2 is specified by DCI (e.g., PRI = 010). For example, when using the first PRI determination method, the UE can determine the PUCCH resource based on the PRI included in the DCI that schedules the first type of PDSCH.

[0139] exist Figure 5 , an example of a case where a specific type is determined based on multiplexing rules (option 3) is shown.

[0140] The UE determines the PUCCH resource set to be used as a candidate based on the total value of the payload of each type of UCI and the value of the payload boundary of each type of PUCCH resource set (step 0). Figure 5 , a case where a PUCCH resource set (set #A1) for the first type configuration and a PUCCH resource set (set #B1) for the second type configuration are selected is shown.

[0141] Next, the UE selects a PUCCH resource set based on the payload boundary value (eg, payload upper limit) of the selected PUCCH resource set (step 1). Here, the case where set #A1 with a small payload upper limit is selected is shown.

[0142] Next, the UE selects a specific PUCCH resource from the PUCCH resources included in the set #A1 based on the information notified via the DCI (step 2). Figure 5 , shows a case where PUCCH resources #0 to #7 are included in set #A1, and PUCCH resource #0 is specified by DCI (e.g., PRI = 000). For example, when using the first PRI determination method, the UE can determine the PUCCH resource based on the PRI included in the DCI scheduling the first type of PDSCH.

[0143] In this way, when a plurality of UCIs corresponding to different types are allocated to the same PUCCH resource, the PUCCH resource is determined based on a PUCCH resource set corresponding to a specific type based on a specific condition, thereby enabling appropriate control of UCI transmission.

[0144] (Second Method)

[0145] In the second method, when using the same PUCCH resources to send UCI (e.g., HARQ-ACK) corresponding to different types (e.g., first type and second type), the PUCCH resources are determined considering the PUCCH resource sets set for each type.

[0146] When PUCCH resources for the first type of UCI conflict with PUCCH resources for the second type of UCI, the UE may determine PUCCH resources to be used by considering the PUCCH resource set configured for the first type and the PUCCH resource set configured for the second type.

[0147] For example, the UE selects a PUCCH resource set from among the PUCCH resource sets configured for each type based on the total value of the payload of each type of UCI. In this case, the UE may also control the determination of the PUCCH resource set and PUCCH resources based on the number of selected PUCCH resource sets (or PUCCH resource sets corresponding to the total value).

[0148] The following describes the PUCCH resource determination action for the case where there are multiple (for example, 2) PUCCH resource sets (Case 1), one (Case 2), and no PUCCH resource sets (Case 3) selected based on the total value of the payload of the first type of UCI and the second type of UCI.

[0149] <Scenario 1>

[0150] When there are multiple (e.g., two) PUCCH resource sets corresponding to the combined payload value of the first type of UCI and the second type of UCI, the UE may determine the PUCCH resource to be used based on a specific condition. The specific condition may also be a transmission condition or parameter for the PUCCH resource selected from each PUCCH resource set.

[0151] Figure 7 An example of a case where the first type of UCI and the second type of UCI are multiplexed into the same PUCCH resource is shown. Figure 7 , it is shown that a PUCCH resource set is selected from the first type and the second type respectively.

[0152] In the following description, an example is given in which two PUCCH resource sets (e.g., set #A0 and set #A1) are configured for the first type, and two PUCCH resource sets (e.g., set #B0 and set #B1) are configured for the second type. The number of PUCCH resource sets configured for each type is not limited to two and may be one or three or more. Furthermore, the number of PUCCH resource sets configured for each type may also be different.

[0153] Here, it is assumed that the total payload of the first type of UCI (e.g., HARQ-ACK bits) and the payload of the second type of UCI is N (e.g., 4 bits), and 0 < Set #A0 ≤ 2, 2 < Set #A1 ≤ 6, 0 < Set #B0 ≤ 2, and 2 < Set #B1 ≤ 8. If the total payload of each type of UCI is 4 bits, this total value is included in the payload range of Set #A1 and the payload range of Set #B1.

[0154] In this case, the UE selects set #A1 and set #B1 as candidates for PUCCH resource sets. When there are multiple selected PUCCH resource sets, the UE may determine the PUCCH resources to be used using the following steps (step 2-1 to step 2-1).

[0155] [Step 2-1]

[0156] The UE selects a PUCCH resource from each selected PUCCH resource set. For example, the UE determines a PUCCH resource from multiple PUCCH resources included in set #A1 corresponding to the first type. The UE may also determine a PUCCH resource based on the PRI included in the DCI that schedules the PDSCH of the first type.

[0157] Similarly, the UE determines one PUCCH resource from the multiple PUCCH resources included in the set #B1 corresponding to the second type. The UE may also determine the PUCCH resource based on the PRI included in the DCI scheduling the second type of PDSCH.

[0158] exist Figure 7 , a case is shown where PUCCH resource #A0 is selected from set #A1 and PUCCH resource #B2 is selected from set #B1.

[0159] [Step 2-2]

[0160] The UE determines a specific PUCCH resource from the PUCCH resources selected from each type of PUCCH resource set based on specific conditions. For example, the UE may also determine the PUCCH resource to be used based on the transmission conditions or parameters of each PUCCH resource.

[0161] The transmission condition or parameter of the PUCCH resource may be at least one of the starting symbol of the PUCCH resource, the period of PUCCH transmission (or PUCCH resource length, PUCCH length), the resource size, and the associated type.

[0162] For example, the UE may select the PUCCH resource with the earliest starting symbol among multiple PUCCH resources. If there are multiple PUCCH resources with the same starting symbol, a PUCCH resource with a shorter PUCCH length (or PUCCH transmission period) may be selected. If there are multiple PUCCH resources with the same PUCCH transmission period, a PUCCH resource corresponding to a specific type (e.g., one of the first type and the second type) may be selected.

[0163] Alternatively, the UE may select a PUCCH resource with the shortest PUCCH length. Alternatively, the UE may select a PUCCH resource with the most resources that can be used for UCI.

[0164] exist Figure 7 , it is shown that the UE preferentially selects PUCCH resources with shorter PUCCH lengths (or PUCCH resource lengths, PUCCH transmission durations). For example, if the PUCCH length of PUCCH resource #A0 is shorter than that of PUCCH resource #B2, the UE selects PUCCH resource #A0.

[0165] By determining PUCCH resources in this way while taking into account a plurality of types of PUCCH resource sets, the types of applicable PUCCH resources can be increased, thereby enabling appropriate control of UCI transmission.

[0166] <Scenario 2>

[0167] When there is only one PUCCH resource set corresponding to the total value of the payload of the first type UCI and the second type UCI, the UE may also use the PUCCH resources included in the PUCCH resource set.

[0168] exist Figure 8 , a case where one PUCCH resource set is selected from each of the first and second types is shown. In the following description, a case where two PUCCH resource sets (e.g., set #A0 and set #A1) are configured for the first type and two PUCCH resource sets (e.g., set #B2 and set #B3) are configured for the second type is used as an example.

[0169] Here, it is assumed that the total of the first-type UCI payload and the second-type UCI payload is N (for example, 32 bits), and that 0 < Set #A0 ≤ 2, 2 < Set #A1 ≤ 12, 12 < Set #B2 ≤ 48, and 48 < Set #B3 ≤ 96. If the total of the payloads of each type of UCI is 32 bits, this total value is included in the payload range of Set #B2.

[0170] In this case, the UE selects set #B2 as the PUCCH resource set. When only one PUCCH resource set is selected, the UE may also select one PUCCH resource from the PUCCH resources included in the PUCCH resource set (here, set #B2) based on the DCI.

[0171] exist Figure 8 , shows a case where PUCCH resources #0 to #7 are included in set #B2, and PUCCH resource #7 is specified by DCI (e.g., PRI=111). The DCI may also be a DCI for scheduling a PDSCH of the type (second type) corresponding to the selected PUCCH resource set (here, set #B2).

[0172] <Scenario 3>

[0173] Consider also the case where there is no PUCCH resource set corresponding to the combined payload value of the first type UCI and the second type UCI. In this case, the UE can also control the transmission process (e.g., selection of a PUCCH resource set, etc.) by bundling at least one of the first type UCI and the second type UCI (Option 2-1). Alternatively, the UE can control the transmission process (e.g., selection of a PUCCH resource set, etc.) by discarding one of the first type UCI or the second type UCI (Option 2-2).

[0174] [Option 2-1]

[0175] exist Figure 9 , a case where a PUCCH resource set corresponding to the total value of the payload of the first type of UCI and the second type of UCI does not exist is shown.

[0176] In the following description, a case where one PUCCH resource set (for example, set #A0) is configured for the first type and one PUCCH resource set (for example, set #B0) is configured for the second type is taken as an example for description.

[0177] Here, it is assumed that the total payload of the first type of UCI and the payload of the second type of UCI is N (for example, 4 bits), and 0 < set #A0 ≤ 2, and 0 < set #B0 ≤ 2. If the total payload of each type of UCI is 4 bits, this total value is not included in the payload range of any PUCCH resource set.

[0178] In this case, the UE may also perform bundling processing on at least one of the first type UCI and the second type UCI to compress the UCI payload. The UE may also apply at least one of the following bundling methods 1 to 3 as the bundling processing.

[0179] Bundling method 1

[0180] The UE may also perform bundling processing only on the first type of UCI (e.g., HARQ-ACK). For example, the UE may also apply bundling to the first type of HARQ-ACK and set it to 1 bit. In this case, the first type of UCI payload (1 bit) and the second type of UCI payload (N type2_HARQ-ACK ) is N=1+N type2_HARQ-ACK bit.

[0181] Bundling method 2

[0182] The UE may also perform bundling processing only on the second type of UCI (e.g., HARQ-ACK). For example, the UE may also apply bundling to the second type of HARQ-ACK and set it to 1 bit. In this case, the first type of UCI payload (N type1_HARQ-ACK ) and the total (N) of the second type of UCI payload (1 bit) is N=N type1_HARQ-ACK +1 bit.

[0183] Bundling method 3

[0184] The first type of HARQ-ACK and the second type of HARQ-ACK may also be bundled separately. For example, the UE may apply bundling to the first type of HARQ-ACK and set it to 1 bit, and apply bundling to the second type of HARQ-ACK and set it to 1 bit. In this case, the total (N) of the first type of UCI payload (1 bit) and the second type of UCI payload (1 bit) is N = 2 bits.

[0185] The UE may also control the re-selection of the corresponding PUCCH resource set and PUCCH resources based on the processed payload after bundling (e.g., the sum (N’) of the payloads of the UCI of the first type and the UCI of the second type). The re-selection of the PUCCH resource set and PUCCH resources may also utilize at least one of the above-mentioned Case 1 and Case 2.

[0186] In Figure 9 it shows the case where the UE applies bundling processing (bundling method 3) to each type of UCI because the PUCCH resource set corresponding to the sum of the payloads of the UCI of the first type and the UCI of the second type (here, 4 bits) is not set. As the PUCCH resource sets corresponding to the sum of the payloads of the UCI of the first type and the UCI of the second type after bundling processing (here N’ = 2 bits), there are set #A0 and set #B0.

[0187] In such a case, the UE only needs to apply the method described in the above Case 1 to determine the PUCCH resource set and PUCCH resources.

[0188] [Option 2-2]

[0189] The UE may also discard one of the UCI of the first type or the UCI of the second type. For example, the UE may also perform control to discard the UCI of the second type and only transmit the UCI of the first type.

[0190] In Figure 9 the UE may also perform control to discard the UCI of the second type and transmit the UCI of the first type using the PUCCH resource set (here, set #A0) set for the first type.

[0191] <NW Action>

[0192] The network (e.g., the base station) may also perform control so that there is only one PUCCH resource set corresponding to the sum of the payloads of the UCI of the first type and the UCI of the second type. In this case, the UE may also assume that there are not multiple PUCCH resource sets corresponding to the sum of the payloads of the UCI of the first type and the UCI of the second type. That is, it may also be set to only support the structure of the above Case 2. Thus, in the case of multiplexing the UCI of the first type and the UCI of the second type onto a common PUCCH resource, the determination of the PUCCH resource set can be simplified.

[0193] In this way, considering the PUCCH resource sets respectively set for multiple types to select the PUCCH resources, the PUCCH resources multiplexing multiple types of UCI can be flexibly set.

[0194] (Third Method)

[0195] In the third example, a case will be described where, when the first type of UCI and the second type of UCI are transmitted using the same PUCCH resource, the PUCCH resource is determined based on a specific PUCCH resource set.

[0196] If the PUCCH resources for the first type of UCI conflict with the PUCCH resources for the second type of UCI, the UE may transmit the first type of UCI and the second type of UCI using PUCCH resources included in a specific PUCCH resource set. A specific PUCCH resource set may be a PUCCH resource set that is different from (or independent of) the PUCCH resource set configured for the first type and the PUCCH resource set configured for the second type.

[0197] Figure 10 An example of controlling transmission of the first type of UCI and the second type of UCI using PUCCH resources associated with a PUCCH resource set different from the PUCCH resource sets configured for the first type and the second type, respectively, is shown.

[0198] exist Figure 10 In FIG, two PUCCH resource sets (e.g., set #A0 and set #A1) are set for the first type and two PUCCH resource sets (e.g., set #B2 and set #B3) are set for the second type. In addition, a case is shown where one PUCCH resource set (set #C0) is set, which is different from the PUCCH resource set for the first type and the PUCCH resource set for the second type. In addition, the number of PUCCH resource sets set is not limited to Figure 10 The structure shown.

[0199] The PUCCH resource set (set #C0) can also be configured from the base station to the UE via higher-layer signaling. Furthermore, set #C0 can be associated with multiple PUCCH resources with different payloads (or the number of bits that can be accommodated). These multiple PUCCH resources can also be configured to the UE via higher-layer signaling.

[0200] exist Figure 10In the case where PUCCH resources #C0, #C1, #C2, #C3 with different payloads are included in set #C0. Here, as an example, the case where 2 < PUCCH resource #C0 ≤ 4, 4 < PUCCH resource #C1 ≤ 10, 10 < PUCCH resource #C2 ≤ 20, 20 < PUCCH resource #C3 ≤ 35 is shown.

[0201] The UE selects the PUCCH resource corresponding to the total (N) of the payloads of the first type of UCI and the second type of UCI. Here, the case where the total of the payloads is 10 bits (N = 10 bits) and the UE selects PUCCH resource #1 is shown.

[0202] In this way, in the case of multiplexing different types of UCI onto a common PUCCH resource for transmission, a PUCCH resource set different from the PUCCH resource sets separately set for each type can also be applied. Thereby, the applied PUCCH resource set can be set flexibly. Further, by setting multiple payloads (for example, payloads with a large size) of each PUCCH resource included in the PUCCH resource set, it is possible to appropriately prepare the PUCCH resource corresponding to the total of the payloads of multiple types of UCI.

[0203] <Variation>

[0204] In Figure 10 the case of multiplexing different types of UCI onto the same PUCCH resource, the case where one PUCCH resource set to be applied is shown, but the set PUCCH resource set can also be set to two or more. In this case, two or more PUCCH resource sets (specific PUCCH resource sets) can also be set different from the PUCCH resource set set for the first type and the PUCCH resource set set for the second type.

[0205] Figure 11 An example of the case of using a PUCCH resource included in any one of two (here) PUCCH resource sets set different from the PUCCH resource sets separately set for the first type and the second type is shown.

[0206] In Figure 11In FIG, two PUCCH resource sets (e.g., set #A0, set #A1) are set for the first type and two PUCCH resource sets (e.g., set #B2, set #B3) are set for the second type. In addition, a case is shown in which two PUCCH resource sets (set #C0, set #C1) are set, which are different from the PUCCH resource sets for the first type and the PUCCH resource sets for the second type. In addition, the number of PUCCH resource sets to be set is not limited to Figure 11 The structure shown.

[0207] Alternatively, a structure may be set such that Set #C0 and Set #C1 correspond to different payloads. For example, the UE may determine the PUCCH resource set based on the multiplexed UCI payload. Furthermore, Set #C0 and Set #C1 may each be associated with one or more PUCCH resources.

[0208] exist Figure 11 In this example, it is assumed that the total payload of the first type of UCI (e.g., HARQ-ACK bits) and the payload of the second type of UCI is N (e.g., 10 bits), and 0 < Set #C0 ≤ 2, and 2 < Set #C1 ≤ 40. If the total payload of each type of UCI is 10 bits, this total value is included in the payload range of Set #C1.

[0209] In this case, the UE selects set #C1 as the PUCCH resource set. In the case where the selected PUCCH resource set includes multiple PUCCH resources, the UE may also select one PUCCH resource based on a specific condition.

[0210] For example, the UE may also determine the PUCCH resource to be used based on the transmission conditions or parameters of each PUCCH resource. The transmission conditions or parameters of the PUCCH resource may also be at least one of the starting codeword of the PUCCH resource, the period of PUCCH transmission (or PUCCH resource length, PUCCH length), the resource size, and the associated type.

[0211] For example, the UE may select the PUCCH resource with the earliest starting symbol among multiple PUCCH resources. If there are multiple PUCCH resources with the same starting symbol, a PUCCH resource with a shorter PUCCH length (or PUCCH transmission period) may be selected. If there are multiple PUCCH resources with the same PUCCH transmission period, a PUCCH resource corresponding to a specific type (e.g., one of the first type and the second type) may be selected.

[0212] Alternatively, the UE may also select the PUCCH resource with the shortest PUCCH length. Figure 11 , it is shown that the PUCCH resource #C1 having the shortest PUCCH length among the multiple PUCCH resources #C0, #C1, #C2, and #C3 included in the selection set #C1 is selected.

[0213] Alternatively, the UE may determine the PUCCH resource to be used based on information notified from the base station (e.g., at least one of higher layer signaling and DCI). For example, PUCCH resource candidates may be set via higher layer signaling, and the UE may determine a specific PUCCH resource based on the information notified via DCI.

[0214] In this way, when different types of UCI are multiplexed onto common PUCCH resources for transmission, a PUCCH resource set different from the one configured for each type can be used. This allows for flexible configuration of the PUCCH resource set to be used. Furthermore, by configuring multiple payloads (e.g., large payloads) for each PUCCH resource included in a PUCCH resource set, it is possible to appropriately prepare PUCCH resources corresponding to the total payload size of multiple types of UCI.

[0215] (Wireless Communication System)

[0216] 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.

[0217] Figure 12 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.

[0218] 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.

[0219] 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.

[0220] 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)).

[0221] 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 located 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 arrangement 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.

[0222] The user terminal 20 may also be connected to at least one of the multiple base stations 10. The user terminal 20 may also utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0223] 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 (above-24 GHz)). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to this. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0224] Furthermore, the user terminal 20 may communicate in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0225] 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 can also be called an IAB node.

[0226] 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).

[0227] The user terminal 20 may also be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0228] 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.

[0229] 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 applied to the UL and DL radio access schemes.

[0230] In the wireless communication system 1, as downlink channels, 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. can also be used.

[0231] In addition, in the wireless communication system 1, as uplink channels, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. can also be used.

[0232] The PDSCH is used to transmit user data, higher-layer control information, and system information blocks (SIBs). The PUSCH can also be used to transmit user data, higher-layer control information, and the Master Information Block (MIB). The PBCH can also be used to transmit the Master Information Block (MIB).

[0233] 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.

[0234] 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.

[0235] 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.

[0236] A search space may also correspond to PDCCH candidates that correspond to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. Furthermore, 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.

[0237] 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 acknowledgment (HARQ-ACK)), ACK / NACK, and scheduling request (SR)) can also be transmitted via the PUCCH. A random access preamble used to establish a connection with a cell can also be transmitted via the PRACH.

[0238] 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.

[0239] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. In the wireless communication system 1, as DL-RS, 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. may also be transmitted.

[0240] 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 including SSs (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as an SS / PBCH block, an SS block (SSB), or the like. Furthermore, SSs and SSBs may also be referred to as reference signals.

[0241] In addition, in the wireless communication system 1, as an 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).

[0242] (Base Station)

[0243] Figure 13 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.

[0244] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and the base station 10 can also be assumed to have other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0245] 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 the common knowledge in the technical field to which this disclosure relates.

[0246] 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.

[0247] 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 the common knowledge in the technical field involved in this disclosure.

[0248] 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.

[0249] The transmitting and receiving antenna 130 can be formed of an antenna described based on the common knowledge in the technical field to which this disclosure relates, such as an array antenna.

[0250] 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.

[0251] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0252] 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.

[0253] 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, 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.

[0254] 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 .

[0255] 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 .

[0256] 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.

[0257] 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.

[0258] 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.

[0259] 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 .

[0260] In addition, the transmitting and receiving unit 120 receives uplink control information corresponding to the first type and uplink control information corresponding to the second type multiplexed into the same PUCCH resource. The transmitting and receiving unit 120 may also transmit information related to PUCCH resource sets configured for each type and information related to PUCCH resources associated with each PUCCH resource using at least one of higher layer signaling and downlink control information.

[0261] In the event that a first uplink control channel resource corresponding to a first type of uplink control information conflicts with a second uplink control channel resource corresponding to a second type of uplink control information, the control unit 110 may also control a specific uplink control channel resource set and selection of uplink control channel resources to be used in sending the first uplink control information and the second uplink control information.

[0262] (User Terminal)

[0263] Figure 14 This 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.

[0264] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and the user terminal 20 may also be assumed to have other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0265] 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 the common knowledge in the technical field to which this disclosure relates.

[0266] 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.

[0267] 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 the common knowledge in the technical field involved in this disclosure.

[0268] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0269] The transmitting and receiving antenna 230 can be formed of an antenna described based on the common knowledge in the technical field to which this disclosure relates, such as an array antenna.

[0270] 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.

[0271] 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.

[0272] 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.

[0273] 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.

[0274] 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 activated (enabled), the transmitting / receiving unit 220 (transmitting processing unit 2211) may also 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 also perform DFT processing as the aforementioned transmission processing without performing DFT processing.

[0275] 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 .

[0276] 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 .

[0277] 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.

[0278] 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.

[0279] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be constituted by at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0280] In addition, the transmitting and receiving unit 220 uses the same PUCCH resources to transmit uplink control information corresponding to the first type and uplink control information corresponding to the second type. The transmitting and receiving unit 220 may also use at least one of higher layer signaling and downlink control information to receive information related to PUCCH resource sets configured for each type and information related to PUCCH resources associated with each PUCCH resource.

[0281] When the first uplink control channel resources corresponding to the first type of uplink control information conflict with the second uplink control channel resources corresponding to the second type of second uplink control information, the control unit 210 may select uplink control channel resources included in a specific uplink control channel resource set.

[0282] For example, the control unit 210 may consider only one of the one or more uplink control channel resource sets configured for the first type and the one or more uplink control channel resource sets configured for the second type as the specific uplink control channel resource set.

[0283] Alternatively, the control unit 210 may consider both one or more uplink control channel resource sets configured for the first type and one or more uplink control channel resource sets configured for the second type as the specific uplink control channel resource set.

[0284] Alternatively, the control unit 210 may also consider one or more uplink control channel resource sets that are different from the uplink control channel resource sets configured for the first type and the uplink control channel resource sets configured for the second type as the specific uplink control channel resource sets.

[0285] The control unit 210 may also determine a specific uplink control channel resource set based on the total number of bits of the first uplink control information and the second uplink control information.

[0286] (Hardware Structure)

[0287] 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 connected (for example, by wired, wireless, etc.) and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0288] 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.

[0289] 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 15 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.

[0290] 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.

[0291] 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.

[0292] 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.

[0293] 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 aforementioned control unit 110 (210) and the transmitting and receiving unit 120 (220) may also be implemented by the processor 1001.

[0294] 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 the program. 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.

[0295] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other appropriate 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 can store executable programs (program code), software modules, etc. for implementing the wireless communication method according to an embodiment of the present disclosure.

[0296] 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 appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0297] 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. For example, it is also called a network device, a network controller, a network card, a communication module, etc. In order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220) and the transmitting and receiving antenna 130 (230) may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be installed with the transmitting unit 120a (220a) and the receiving unit 120b (220b) separated physically or logically.

[0298] 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).

[0299] 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.

[0300] Furthermore, the base station 10 and 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 this hardware to implement part or all of each functional block. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0301] (Variation)

[0302] 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.

[0303] 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).

[0304] 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, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0305] 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.

[0306] 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.

[0307] 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.

[0308] For example, a subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, and a time slot or a mini-time slot can also be called a TTI. In other words, at least one of a subframe and a TTI can be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. In addition, the unit representing a TTI can also be called a time slot, a mini-time slot, etc. instead of a subframe.

[0309] 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.

[0310] 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.

[0311] Furthermore, when a time slot or a mini-time slot is referred to as a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-time slots) may also be the minimum time unit for scheduling. Furthermore, the number of time slots (mini-time slots) constituting the minimum time unit for scheduling may also be controlled.

[0312] 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.

[0313] 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.

[0314] 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.

[0315] 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.

[0316] 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.

[0317] 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.

[0318] 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.

[0319] 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.

[0320] 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."

[0321] 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.

[0322] 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.

[0323] In this disclosure, the names used for parameters, etc., are not intended to be limiting in any respect. Furthermore, the mathematical formulas for these parameters, etc., 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.

[0324] 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.

[0325] 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.

[0326] 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.

[0327] 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.

[0328] 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.

[0329] 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).

[0330] 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).

[0331] Whether software is called software, firmware, middleware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software module, application, software application, software package, routine, sub-routine, object, executable file, execution thread, procedure, function, etc.

[0332] 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.

[0333] 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).

[0334] 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.

[0335] 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.

[0336] 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 the base station and base station subsystem that provides communication services within the coverage area.

[0337] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (UE)”, and “terminal” can be used interchangeably.

[0338] 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.

[0339] 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 vehicle (e.g., a vehicle, an aircraft, 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 during 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.

[0340] 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.

[0341] 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.

[0342] In the present disclosure, operations 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.

[0343] 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.

[0344] 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), SUPER3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future Generation Radio Access (FX), Global System for Mobile Communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.18 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (WiMAX (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (WiMAX (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 8 802.20, 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.).

[0345] 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.”

[0346] Any reference to an element using the designations "first," "second," etc., as used in this disclosure, does not necessarily limit 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 necessarily imply that only two elements may be used, or that the first element must in some way take precedence over the second element.

[0347] The term "determining" as used in this disclosure may encompass a variety of operations. For example, "determining" may also be considered as "judging," calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), ascertaining, etc.

[0348] In addition, "judgment (decision)" can also be regarded as a situation of "judgment (decision)" on receiving (for example, receiving information), transmitting (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc.

[0349] In addition, "judgment (decision)" can also be regarded as a situation in which "judgment (decision)" is performed on resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment (decision)" can also be regarded as a situation in which "judgment (decision)" is performed on some operations.

[0350] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and so on.

[0351] 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."

[0352] In the present disclosure, when two elements are connected, it can be considered that they are "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0353] 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 as meaning "different."

[0354] In this disclosure, when the terms "include," "including," and variations thereof are used, these terms, like the term "comprising," have an inclusive meaning. Furthermore, the term "or" used in this disclosure does not mean an exclusive OR.

[0355] 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.

[0356] 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 that, when a first uplink control channel (PUCCH) resource for a first delivery acknowledgment information HARQ-ACK corresponding to a first priority conflicts with a second PUCCH resource for a second HARQ-ACK corresponding to a second priority lower than the first priority, determines, based on a total value of HARQ-ACK information bits in the first HARQ-ACK and HARQ-ACK information bits in the second HARQ-ACK, and a value of a PUCCH resource identifier (PRI) field included in DCI for scheduling a PDSCH corresponding to the first priority, PUCCH resources for transmitting the first HARQ-ACK and the second HARQ-ACK; and The transmitting unit multiplexes the first HARQ-ACK and the second HARQ-ACK in the determined PUCCH resource and transmits the multiplexed HARQ-ACK.

2. The terminal according to claim 1, wherein: The first HARQ-ACK and the second HARQ-ACK are HARQ-ACKs corresponding to different services.

3. The terminal according to claim 1, wherein: The control unit determines a PUCCH resource set based on the total value, and determines PUCCH resources for transmitting the first HARQ-ACK and the second HARQ-ACK from the PUCCH resource set based on a value of the PRI field.

4. A wireless communication method, which is a wireless communication method of a terminal, comprising: In a case where a first uplink control channel PUCCH resource for a first delivery confirmation information HARQ-ACK corresponding to a first priority conflicts with a second PUCCH resource for a second HARQ-ACK corresponding to a second priority lower than the first priority, determining PUCCH resources for transmitting the first HARQ-ACK and the second HARQ-ACK based on a total value of HARQ-ACK information bits in the first HARQ-ACK and HARQ-ACK information bits in the second HARQ-ACK, and a value of a PUCCH resource identifier PRI field included in DCI for scheduling a PDSCH corresponding to the first priority; and The step of multiplexing the first HARQ-ACK and the second HARQ-ACK in the determined PUCCH resource and sending them.

5. A base station comprising: a control unit that controls, when a first uplink control channel (PUCCH) resource for a first delivery confirmation information HARQ-ACK corresponding to a first priority conflicts with a second PUCCH resource for a second HARQ-ACK corresponding to a second priority lower than the first priority, determining PUCCH resources for receiving the first HARQ-ACK and the second HARQ-ACK based on a total value of HARQ-ACK information bits in the first HARQ-ACK and HARQ-ACK information bits in the second HARQ-ACK, and a value of a PUCCH resource identifier (PRI) field included in DCI for scheduling a PDSCH corresponding to the first priority; and The receiving unit multiplexes the first HARQ-ACK and the second HARQ-ACK in a PUCCH resource determined by the terminal and receives the multiplexed signals.

6. A system comprising a terminal and a base station, The terminal has: a control unit, when a first uplink control channel (PUCCH) resource for a first delivery acknowledgment information HARQ-ACK corresponding to a first priority conflicts with a second PUCCH resource for a second HARQ-ACK corresponding to a second priority lower than the first priority, determining, based on a total value of HARQ-ACK information bits in the first HARQ-ACK and HARQ-ACK information bits in the second HARQ-ACK, and a value of a PUCCH resource identifier (PRI) field included in DCI for scheduling a PDSCH corresponding to the first priority, PUCCH resources for transmitting the first HARQ-ACK and the second HARQ-ACK; as well as a transmitting unit, multiplexing the first HARQ-ACK and the second HARQ-ACK in the determined PUCCH resource and transmitting the same, The base station has: a control unit, controlling a determination of PUCCH resources for receiving the first HARQ-ACK and the second HARQ-ACK; as well as The receiving unit multiplexes the first HARQ-ACK and the second HARQ-ACK and receives them.

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