Terminal, wireless communication method, base station, and system

Abstract

A user terminal includes: a receiving unit that receives configuration information for a search space set; and a control unit that controls monitoring of downlink control information (DCI) in a first format other than formats 0_0 and 0_1 for scheduling an uplink shared channel, and a second format other than formats 1_0 and 1_1 for scheduling a downlink shared channel, in the search space set configured based on the configuration information. According to one embodiment of the present disclosure, monitoring of downlink control information can be appropriately controlled.

Description

Technical Field

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

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

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

[0004] Prior art literature

[0005] Non-patent literature

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

[0007] Problems to be solved by the invention

[0008] Research is underway to introduce a new format in future wireless communication systems (hereinafter also referred to as NR) that is different from the previous formats of downlink control information (downlink control information (DCI)) (for example, DCI formats 1_0, 1_1, 0_0, 0_1, 2_0, 2_1, 2_2, and 2_3).

[0009] This new format can also be used for at least one of ultra-reliable and low-latency communications (Ultra-Reliable and Low-Latency Communications (URLLC)) services and uplink preemption, for example.

[0010] However, when this new format is introduced, there is a concern that the search space set used for DCI monitoring (also known as blind decoding, etc.) may not be properly configured for the UE. As a result, there is a concern that the UE may not be able to properly control DCI monitoring.

[0011] Therefore, one of the objects of the inventors of the present invention is to provide a user terminal and a wireless communication method that can appropriately control monitoring of DCI.

[0012] Means for solving problems

[0013] A user terminal involved in one embodiment of the present disclosure is characterized in that it has: a receiving unit that receives setting information of a search space set; and a control unit that controls the monitoring of downlink control information (DCI) in a first format other than formats 0_0 and 0_1 for scheduling uplink shared channels, and a second format other than formats 1_0 and 1_1 for scheduling downlink shared channels in the search space set set based on the setting information.

[0014] Effects of the Invention

[0015] According to one aspect of the present disclosure, it is possible to appropriately control the monitoring of DCI. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a diagram showing an example of SS setting information.

[0017] Figure 2 This is a diagram showing an example of SS setting information according to the first setting example of the first aspect.

[0018] Figure 3 This is a diagram showing an example of second SS setting information according to the second setting example of the first aspect.

[0019] Figure 4 This is a diagram showing another example of the second SS setting information according to the second setting example of the first aspect.

[0020] Figure 5A 5B is a diagram showing an example of UE-specific PDCCH information according to the second example.

[0021] Figure 6 This is a diagram showing an example of SS setting information according to the second example.

[0022] Figure 7 This is a diagram showing another example of SS setting information according to the second embodiment.

[0023] Figure 8 This is a diagram showing an example of the first prioritization of SS sets according to the third example.

[0024] Figure 9 This is a diagram showing an example of the second prioritization of SS sets according to the third example.

[0025] Figure 10 This is a diagram showing an example of a schematic configuration of a wireless communication system according to one embodiment.

[0026] Figure 11 This is a diagram showing an example of the configuration of a base station according to one embodiment.

[0027] Figure 12 This is a diagram showing an example of the configuration of a user terminal according to one embodiment.

[0028] Figure 13 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

[0029] (Search space collection)

[0030] For a UE, one or more search space (SS) sets are configured. SS sets are also called PDCCH search space sets, search spaces, etc.

[0031] The UE monitors PDCCH candidates in one or more SS sets. The one or more SS sets may also include at least one SS set common to one or more UEs (common search space (CSS) set) and a UE-specific SS set (UE-specific search space (USS) set).

[0032] The UE may also receive configuration information for each SS set (SS configuration information, e.g., Radio Resource Control (RRC) Information Element (IE) (also known as RRC parameter) "SearchSpace"). For example, the UE may also receive the configuration information for each SS set through higher layer signaling. The configuration information for each SS may also be included in the configuration information for a UE-specific PDCCH (e.g., "PDCCH-Config" of an RRC IE) or the configuration information for a cell-specific PDCCH (e.g., "PDCCH-ConfigCommon" of an RRC IE).

[0033] Each SS configuration information may include, for example, at least one of the following parameters (or information related to at least one of the following parameters).

[0034] (1) Identifier of the SS set (search space ID, for example, "searchSpaceId" in RRC IE)

[0035] (2) The identifier of the CORESET associated with the SS set (control resource set ID, for example, "controlResourceSetId" in RRC IE)

[0036] (3) Contains the period and offset of the monitoring opportunity of the SS set (e.g., "monitoringSlotPeriodicityAndOffset" in RRC IE)

[0037] (4) The duration of the monitoring opportunity (e.g., the duration of the RRC IE)

[0038] (5) The number of PDCCH candidates per aggregation level within the SS set (e.g., “nrofCandidates” in the RRC IE)

[0039] (6) Type of SS set such as CSS set or USS set (search space type, for example, "searchSpaceType" in RRC IE)

[0040] (7) Information related to the CSS set (CSS set information, for example, "common" in RRC IE)

[0041] (8) Information related to the USS set (USS set information, for example, "ue-Specific" of RRC IE).

[0042] Here, (7) CSS set information may also include information related to the DCI format monitored in the CSS set (DCI format information, for example, "dci-Format0-0-AndFormat1-0", "dci-Format2-0", "dci-Format2-1", "dci-Format2-2", and "dci-Format2-3" in RRC IE). The DCI format information used for the CSS set may also indicate, for example, the DCI format monitored in the CSS set (at least one of DCI formats 0_0 and 1_0, DCI format 2_0, DCI format 2-1, DCI format 2-2, and DCI format 2_3) and at least one of the number of PDCCH candidates for each aggregation level used for monitoring the DCI format.

[0043] The CSS set may also be, for example, a Type 3-PDCCH CSS set for monitoring a DCI format used in scrambling in which cyclic redundancy check (CRC) bits are scrambled (scrambled by CRF) using a Slot Format Indicator (SFI)-Radio Network Temporary Identifier (RNTI), an Interruption (INT)-RNTI, a Transmit Power Control (TPC)-PUSCH-RNTI, a TPC-PUCCH-RNTI, or a TPC-Sounding Reference Symbols (SRS)-RNTI.

[0044] In addition, (8) USS set information may also include information related to the DCI format monitored in the USS set (DCI format information, for example, "dci-Formats" in the RRC IE). The DCI format information for the USS set may also indicate, for example, the DCI format monitored in the USS set (one of DCI formats 0_0 and 1_0, or DCI formats 0_1 and 1_1).

[0045] The USS set is used to monitor the DCI format scrambled by CRC using the C-RNTI or CS-RNTI. At least one of the USS sets for monitoring DCI formats 0_0 and 1_0 and the USS sets for monitoring DCI formats 0_1 and 1_1 may be configured for the UE.

[0046] Here, DCI formats 1_0 and 1_1 are used for scheduling downlink shared channels (e.g., physical downlink shared channel (PDSCH)). DCI formats 0_0 and 0_1 are used for scheduling uplink shared channels (e.g., physical uplink shared channel (PUSCH)).

[0047] DCI formats 0_0 and 1_0 may also have the same size (payload). Furthermore, DCI formats 0_1 and 1_1 may also have the same size. DCI formats 0_0 and 1_0 may also be smaller than DCI formats 0_1 and 1_1, respectively. DCI formats 1_0 and 0_0 are also referred to as fallback DCI, for example. On the other hand, DCI formats 1_1 and 1_0 are also referred to as non-fallback DCI, for example.

[0048] Figure 1 FIG is a diagram showing an example of SS setting information. Figure 1 As shown, the SS configuration information (eg, "SearchSpace" of the RRC IE) may also include at least one of the parameters (information) of (1) to (8) above.

[0049] also, Figure 1 The DCI format information for the USS set within the SS setting information (for example, "dci-Formats" of the RRC IE) may also indicate whether the USS set identified by the search space ID is used to monitor DCI formats 0_0 and 1_0, or DCI formats 0_1 and 1_1.

[0050] Alternatively, each SS set may be configured for the UE based on each SS configuration information. Furthermore, a specific period (PDCCH monitoring opportunity, monitoring opportunity (MO), monitoring period) of a specific cycle for monitoring (blind decoding) each SS set may be configured based on each SS configuration information (e.g., the parameters of (3) and (4) above).

[0051] That is, a monitoring opportunity may be set for each SS set for the UE. The UE may monitor PDCCH candidates for the SS set within the CORESET during the set monitoring opportunity. The monitoring opportunity may also be composed of one or more time slots.

[0052] The maximum number of PDCCH candidates that a UE can monitor for each cell and each time slot can also be limited. This maximum number can also be determined for each subcarrier spacing μ. For example, when the subcarrier spacing μ is 15kHz, 30kHz, 60kHz, or 120kHz, the maximum number can be 44, 36, 22, or 20, respectively.

[0053] Furthermore, the maximum number of non-overlapping Control Channel Elements (CCEs) per cell and per time slot may be limited for a UE. This maximum number may also be determined for each subcarrier spacing μ. For example, when the subcarrier spacing μ is 15 kHz, 30 kHz, 60 kHz, or 120 kHz, the maximum number may be 56, 56, 48, or 32, respectively.

[0054] Furthermore, NR envisions implementing communications corresponding to multiple services (also referred to as use cases, traffic types, etc.) with different requirements within the same cell. These multiple services may include, for example, enhanced mobile broadband (eMBB) and highly reliable and low-latency communications (URLLC). For example, URLLC requires lower latency and higher reliability than eMBB.

[0055] Therefore, in NR, studies are underway to introduce new DCI formats that differ from existing DCI formats (e.g., DCI formats 1_0, 1_1, 0_0, 0_1, 2_0, 2_1, 2_2, and 2_3). This new DCI format can also be used for scheduling PUSCH or PDSCH, or preemption (e.g., uplink preemption).

[0056] Here, the new DCI format used for scheduling the PDSCH is also referred to as DCI format 1_2, etc. The new DCI format used for scheduling the PUSCH is also referred to as DCI format 0_2, etc. In addition, the new DCI format used for uplink preemption is also referred to as DCI format 2_4, etc.

[0057] In addition, the name of the new DCI format is not limited to this. For example, the name of the new DCI format used for scheduling PDSCH and PUSCH may be a name obtained by replacing the "2" in the above-mentioned DCI format 1_2 and DCI format 0_2 with any string other than "0" or "1", or it may be another name. In addition, the name of the new DCI format for uplink preemption may be a name obtained by replacing the "4" in the above-mentioned DCI format 2_4 with any string other than "0", "1", "2", or "3", or it may be another name.

[0058] Thus, when a new DCI format (e.g., at least one of DCI formats 0_2, 1_2, and 2_4) is introduced for scheduling or preemption (e.g., uplink preemption) of PUSCH or PDSCH, it is assumed that an SS set is configured for the UE to monitor the new DCI format. However, how to signal the structure (configuration) of this SS set becomes a problem.

[0059] In other words, the problem is how to construct the SS configuration information used in configuring this SS set. Therefore, the inventors of the present invention have devised a method for appropriately controlling DCI monitoring even when this new DCI format is introduced, by appropriately constructing the SS configuration information used in configuring the SS set that monitors this new DCI format.

[0060] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings.

[0061] The following example illustrates that the new DCI format for PUSCH scheduling is DCI format 0_2, the new DCI format for PDSCH scheduling is DCI format 1_2, and the new DCI format for uplink preemption is DCI format 2_4. However, as mentioned above, the names of these new DCI formats are not limited to the examples.

[0062] (First Method)

[0063] In the first example, the configuration of an SS set (for example, a USS set) that monitors at least one of DCI format 0_2 for scheduling PUSCH and DCI format 1_2 for scheduling PDSCH (DCI format 0_2 / 1_2) will be described.

[0064] The SS set used for DCI format 0_2 / 1_2 may be one of the USS sets set based on SS setting information (for example, "SearchSpace" of RRC IE) (first setting example), or may be a specific USS set set based on SS setting information (second SS setting information) different from the SS setting information (first SS setting information) (second setting example).

[0065] <First setting example>

[0066] One or more USS sets may be configured for the UE. Each USS set configured for the UE may be associated with DCI formats 0_0 and 1_0 (DCI formats 0_0 / 1_0), DCI formats 0_1 and 1_1 (DCI formats 0_1 / 1_1), or the aforementioned DCI formats 0_2 / 1_2.

[0067] Each USS set may also be configured based on the aforementioned SS configuration information (e.g., the "SearchSpace" field of the RRC IE). However, the DCI format information for the USS set within the SS configuration information (e.g., the "dci-Formats" field of the RRC IE) may selectively indicate one of DCI format 0_0 / 1_0, DCI format 0_1 / 1_1, and DCI format 0_2 / 1_2 as the DCI format to be monitored in the USS set.

[0068] Figure 2 1 is a diagram showing an example of SS setting information related to the first setting example of the first embodiment. Figure 2 Some parameters are shown in FIG. 1 , however, the SS setting information (for example, “SearchSpace” of RRC IE) may also include at least one parameter of (1) to (8) above.

[0069] like Figure 2 As shown, the DCI format information for the USS set in the SS setting information (e.g., "SearchSpace" of RRC IE) (e.g., "dci-Formats" of RRC IE) can specify not only DCI format 0_0 / 1_0 or DCI format 0_1 / 1_1, but also DCI format 0_2 / 1_2 as the DCI format to be monitored in the USS set. Figure 1 different.

[0070] like Figure 2As shown, when SS set #1 is configured for UE as the USS set for DCI format 0_0 / 1_0, the SS setting information of SS set #1 (e.g., "SearchSpace" of RRC IE) may also include DCI format information representing DCI format 0_0 / 1_0 (e.g., "dci-Formats" of RRC IE).

[0071] In addition, when SS set #2 is configured for the UE as the USS set for DCI format 0_1 / 1_1, the SS configuration information of SS set #2 (e.g., "SearchSpace" of RRC IE) may also include DCI format information indicating DCI format 0_1 / 1_1 (e.g., "dci-Formats" of RRC IE).

[0072] In addition, when SS set #3 is set to the UE as the USS set for the new DCI format 0_2 / 1_2, the SS setting information of the SS set #3 (for example, "SearchSpace" of RRC IE) can also include DCI format information representing DCI format 0_2 / 1_2 (for example, "dci-Formats" of RRC IE).

[0073] In this way, the USS set for DCI format 0_2 / 1_2 may be configured using SS configuration information (eg, "SearchSpace" of RRC IE) having the same structure as that of the USS set for DCI format 0_0 / 1_0 or DCI format 0_1 / 1_1.

[0074] The UE may monitor the DCI format indicated by the DCI format information in the SS sets #1 to #3 configured by the SS configuration information.

[0075] In the first configuration example, since the DCI format information for USS aggregation in the SS configuration information specifies one of DCI format 0_0 / 0_1, DCI format 0_1 / 1_1, and DCI format 0_2 / 1_2, even if the conventional SS configuration information (e.g., Figure 1 )Add new parameters and set the USS set for the new DCI format 0_2 / 1_2.

[0076] Furthermore, the USS set for DCI format 0_0 / 1_0, the USS set for DCI format 0_1 / 1_1, and the USS set for DCI format 0_2 / 1_2 can be configured using SS configuration information having the same structure.

[0077] <Second setting example>

[0078] It can also be based on the above SS setting information (for example, "SearchSpace" of RRC IE, the first SS setting information, for example, Figure 1 ) to configure the USS set for DCI format 0_2 / 1_2. This second SS configuration information may be used only for configuring a specific SS set (e.g., the USS set for DCI format 0_2 / 1_2), or may be used for configuring the specific SS set and other SS sets other than the specific SS set.

[0079] Figure 3 FIG. 1 is a diagram showing an example of second SS setting information related to the second setting example of the first embodiment. Figure 3 As shown, the second SS setting information (e.g., "SearchSpace formats0-2-And-1-2" or "SearchSpace DCI0-2-And-1-2" of RRC IE) can also be used to set a specific SS set (e.g., the USS set for DCI format 0_2 / 1_2).

[0080] The second SS configuration information may also include at least one of the parameters (1) to (5) above. Furthermore, the second SS configuration information may also include or not include the parameters (6) to (8) above. The second SS configuration information is used to configure the USS set for DCI format 0_2 / 1_2, and therefore, the search space type, etc., may not be specified.

[0081] like Figure 3 As shown, when SS set #3 is set to the UE as the USS set for the new DCI format 0_2 / 1_2, the UE can also determine the search space ID "3", the control resource set ID of the CORESET associated with the SS set #3, the period, offset and duration of the monitoring opportunities including the SS set #3, and at least one of the number of PDCCH candidates for each aggregation level within SS set #3 through the second SS setting information.

[0082] On the other hand, although not shown, when SS sets #1 and #2 are configured for the UE as USS sets for DCI formats 0_0 / 0_1 and 0_1 / 1_1, respectively, the UE may also use the first SS configuration information (e.g., "SearchSpace" of RRC IE, see Figure 1 ).

[0083] In this way, the USS set for DCI format 0_2 / 1_2 can also be set by using second SS setting information with a structure different from the first SS setting information (for example, "SearchSpace" of RRC IE) used in the setting of the USS set for DCI format 0_0 / 1_0 or DCI format 0_1 / 1_1 (for example, "SearchSpace" of RRC IE).

[0084] The UE may also monitor the DCI format information for the USS set in the first SS setting information (for example, Figure 1 On the other hand, the UE may monitor DCI format 0_2 / 1_2 in SS set #3 configured by the second SS configuration information.

[0085] like Figure 3 As shown, by specifying the second SS configuration information used in the configuration of a specific SS set (for example, a USS set for DCI format 0_2 / 1_2), it is possible to not use the conventional first SS configuration information (for example, Figure 1 ) changes are applied and the USS set for the new DCI format 0_2 / 1_2 is set.

[0086] Figure 4 This figure shows another example of second SS configuration information related to the second configuration example of the first embodiment. The second SS configuration information (e.g., the "SearchSpace-v16" RRC IE) can be used not only to configure a specific SS set (e.g., the USS set for DCI formats 0_2 / 1_2), but also to configure other SS sets (e.g., at least one of a CSS set and a USS set).

[0087] In addition, Figure 4However, the second SS setting information (e.g., "SearchSpace-r16" of RRC IE) may also include at least one parameter of (1) to (8) above. The DCI format information for the USS set in the second SS setting information (e.g., "SearchSpace-r16" of RRC IE) (e.g., "dci-Formats" of RRC IE) can specify not only DCI format 0_0 / 1_0 or DCI format 0_1 / 1_1 but also DCI format 0_2 / 1_2 as the DCI format to be monitored in the USS set. Figure 1 The first SS setting information shown in (e.g., "SearchSpace" of RRCIE) is different.

[0088] Figure 1 The first SS setting information shown (e.g., "SearchSpace" of RRC IE) can also be used to set the SS set for UEs that do not assume the setting of the SS set for DCI format 0_2 / 1_2 (e.g., UEs that support up to Rel.15). On the other hand, Figure 4 The second SS configuration information shown (eg, "SearchSpace-r16" of the RRC IE) can also be used to configure the SS set for a UE (eg, a UE supporting Rel.16) that assumes the configuration of the SS set for DCI formats 0_2 / 1_2.

[0089] In this way, different SS setting information (for example, Figure 1 The first SS setting information and Figure 4 The second SS setting information) is used for setting the SS set.

[0090] like Figure 4 As shown, when SS set #1 is set to the UE as the USS set for DCI format 0_0 / 1_0, the second SS setting information for the SS set #1 (for example, "SearchSpace-r16" of RRC IE) may also include DCI format information representing DCI format 0_0 / 1_0 (for example, "dci-Formats" of RRC IE).

[0091] In addition, when SS set #2 is configured for the UE as the USS set for DCI format 0_1 / 1_1, the second SS configuration information for SS set #2 (e.g., "SearchSpace-r16" of RRC IE) may also include DCI format information representing DCI format 0_1 / 1_1 (e.g., "dci-Formats" of RRC IE).

[0092] In addition, when SS set #3 is set to the UE as the USS set for the new DCI format 0_2 / 1_2, the second SS setting information for the SS set #3 (for example, "SearchSpace-r16" of RRC IE) may also include DCI format information representing DCI format 0_2 / 1_2 (for example, "dci-Formats" of RRC IE).

[0093] The UE may monitor the DCI format indicated by the DCI format information in the SS sets #1 to #3 configured by the second SS configuration information.

[0094] like Figure 4 As shown, by specifying the second SS setting information (e.g., "SearchSpace-r16" of RRC IE) for use by UEs supporting the new DCI format (e.g., DCI format 0_2 / 1_2), it is possible to distinguish the operation from that of UEs that do not support the new DCI format (e.g., DCI format 0_2 / 1_2).

[0095] In the second configuration example, by newly defining the second SS configuration information, it is possible to appropriately configure the SS set for the new DCI format (for example, the USS set for DCI format 0_2 / 1_2).

[0096] (Second Method)

[0097] In the second embodiment, the setting of the SS set that monitors DCI format 2_4 for uplink preemption is described.

[0098] Each field in DCI format 2_4 may also indicate an uplink pre-emption indication. Each field may also include a specific number of bits (e.g., 14 bits).

[0099] This DCI format 2_4 may also be a group-common DCI for one or more UEs (also known as group-common DCI, UE group-common DCI, etc.) or a UE-specific DCI. The SS set monitoring this DCI format 2_4 may also be a CSS set (e.g., a Type 3-PDCCH CSS set) or a USS set.

[0100] Information related to uplink preemption (uplink preemption information, for example, “UplinkPreemption” of RRC IE) may also be included in UE-specific PDCCH information (for example, “PDCCH-Config” of RRC IE).

[0101] Alternatively, the SS set for DCI format 2_4 may be configured using SS configuration information (e.g., "SearchSpace" in RRC IE). This SS configuration information may also be included in the UE-specific PDCCH information.

[0102] Figure 5A 5B is a diagram showing an example of UE-specific PDCCH information involved in the second method. Figure 5A As shown, UE-specific PDCCH information (e.g., "PDCCH-Config" of RRC IE) may also include information related to uplink preemption (uplink preemption information, e.g., "UplinkPreemption" of RRC IE), and at least one list (SS list, e.g., "searchSpacesToAddModList" of RRC IE) of one or more SS setting information (e.g., "SearchSpace" of RRC IE).

[0103] like Figure 5B As shown, the uplink preemption information (eg, "UplinkPreemption" of the RRC IE) may also include at least one of the following.

[0104] Information indicating the RNTI (e.g., INT-RNTI) used in CRC scrambling of DCI format 2_4 (e.g., "int-RNTI" of RRCIE)

[0105] Information indicating the payload of DCI format 2_4 scrambled by CRC using INT-RNTI (e.g., "dci-PayloadSize" of RRC IE)

[0106] Information related to the preempted resources (e.g., at least one of frequency domain resources and time domain resources) (preempted resource information, e.g., "timeFrequencySet" of RRC IE).

[0107] The resource preemption information may also represent, for example, the association between bits of a specific field within DCI format 2_4 and one or more code elements.

[0108] The SS set used for DCI format 2_4 may also be set based on the SS setting information in the above-mentioned SS list. The SS set may also be a CSS set or a USS set.

[0109] Figure 6 FIG. 1 is a diagram showing an example of SS setting information according to the second embodiment. Figure 6 An example of SS setting information that can set a CSS set for DCI format 2_4 is shown in FIG. Figure 6 As shown, the SS setting information may also include at least one parameter of the above (1) to (8).

[0110] like Figure 6 As shown, the CSS set information (e.g., RRC IE "common") is used as DCI format information for the CSS set, and includes information related to DCI format 2_4 monitored in the CSS set (DCI format 2_4 information, e.g., RRC IE "dci-Format2-4"), which is consistent with Figure 1 different.

[0111] Figure 6 The DCI format information for the CSS set shown may also, for example, represent the DCI formats monitored in the CSS (at least one of DCI formats 0_0 and 1_0, DCI format 2_0, DCI format 2-1, DCI format 2-2, DCI format 2_3, and DCI format 2_4), and at least one of the numbers of PDCCH candidates for each aggregation level used in monitoring the DCI format.

[0112] When the CSS set information in the SS setting information includes the DCI format 2_4 information (for example, "dci-Format2-4" of the RRC IE), the UE may monitor DCI format 2_4 in the CSS set configured by the SS setting information.

[0113] Figure 7 FIG. 1 is a diagram showing another example of SS setting information according to the second embodiment. Figure 7 An example of SS setting information that can set the USS set for DCI format 2_4 is shown in FIG. Figure 7 As shown, the SS setting information may also include at least one parameter of the above (1) to (8).

[0114] like Figure 7 As shown, the above-mentioned USS set information (for example, "ue-Specific" of RRC IE) may also include DCI format information (for example, "dci-Formats" of RRC IE) that can specify DCI format 0_0 / 1_0, DCI format 0_1 / 1_1 or DCI format 2-4.

[0115] The UE may monitor the USS set configured by the SS configuration information using the DCI format indicated by the DCI format information in the USS set information.

[0116] In the second method, when the UL preempted DCI format 2_3 is supported, the SS set for the DCI format 2_3 can be appropriately configured for the UE.

[0117] (Third Method)

[0118] It is also envisaged that specific constraints (for example, the maximum number of PDCCH candidates that can be monitored in each time slot of each cell, and the number of CCEs that can overlap in each time slot of each cell) are imposed in the monitoring of DCI implemented by the UE (also known as PDCCH monitoring, DCI monitoring, monitoring, blind decoding, etc.).

[0119] Therefore, when DCI format 0_2 / 1_2 is newly introduced, there is a concern that the UE will discard at least one of the monitoring of DCI format 0_2 / 1_2 and the processing based on DCI format 0_2 / 1_2 (monitoring / processing of DCI format 0_2 / 1_2). In addition, the same problem may also occur when DCI format 2_4 is newly introduced.

[0120] Therefore, the UE may prioritize one or more SS sets configured for the UE. Specifically, the UE may prioritize the one or more SS sets regardless of whether they are SS sets (e.g., USS sets) that monitor DCI formats 0_2 / 1_2 (first prioritization). Alternatively, the UE may prioritize the one or more SS sets based on whether they are SS sets (e.g., USS sets) that monitor DCI formats 0_2 / 1_2 (second prioritization).

[0121] <First priority>

[0122] In the first prioritization, the priority of an SS set (e.g., USS set) may be determined based on the search space ID (SS set index), regardless of whether the SS set monitors DCI format 0_2 / 1_2. For example, the priority of an SS set with a smaller (lower) search space ID may be determined to be higher than the priority of an SS set with a larger (higher) search space ID.

[0123] Figure 8 This is a diagram showing an example of the first prioritization of SS sets according to the third method. Figure 8 SS sets #1 to #5 are shown in FIG. 5 , however, the number and IDs of SS sets configured for a UE are not limited to those shown in FIG. For example, SS set #0 may also be configured for a UE.

[0124] For example, in Figure 8 Among them, SS set #1 is the CSS set, SS set #2 is the USS set used for DCI format 0_0 / 1_0, SS set #3 is the USS set used for DCI format 0_1 / 1_1, SS set #4 is the USS set used for DCI format 0_2 / 1_2, and SS set #5 is the USS set used for DCI format 0_2 / 1_2.

[0125] like Figure 8 As shown, in the first prioritization, the priority of each SS set may be set based on the search space ID regardless of whether it is a USS set for DCI format 0_2 / 1_2. Figure 8 In the search space ID, the smaller (lower) the SS set, the higher the priority is set.

[0126] If at least some of the monitoring opportunities for SS sets #1 to #5 overlap within the same time unit (e.g., time slot), the UE may control the monitoring of SS sets #1 to #5 based on the search space ID. Specifically, the UE may prioritize monitoring of SS sets with smaller search space IDs over monitoring of SS sets with larger search space IDs.

[0127] In addition, Figure 8 In this example, the priorities of SS sets #1 through #5 are determined based on the search space ID, regardless of the search space type. However, this is not limiting. The priorities of SS sets #1 through #5 can also be determined based on both the search space ID and the search space type. For example, the priority of the CSS set can be determined to be higher than the priority of the USS set. Among SS sets of the same search space type, the priorities of SS sets can be determined in ascending or descending order of search space ID.

[0128] <Second Priority>

[0129] In the second prioritization, the priority of an SS set may also be determined based on whether it is an SS set (e.g., a USS set) monitoring DCI format 0_2 / 1_2. For example, the priority of an SS set monitoring DCI format 0_2 / 1_2 may be determined to be higher than the priority of SS sets monitoring other DCI formats.

[0130] Figure 9 This is a diagram showing an example of the second prioritization of SS sets according to the third embodiment. Figure 9 In, with Figure 8 The explanation will focus on the differences.

[0131] like Figure 9As shown, in the second prioritization, the priority of each SS set can also be set based on whether it is a USS set for DCI format 0_2 / 1_2. Figure 9 Among them, the priorities of SS sets #4 and #5, which are USS sets for DCI format 0_2 / 1_2, are determined to be higher than the priorities of other SS sets #1 to #3.

[0132] In the second prioritization, between SS set #4 and set #5, which are USS sets for DCI format 0_2 / 1_2, the priorities of SS sets #4 and #5 are determined based on the search space ID. Figure 9 , SS set #4 with a smaller search space ID is preferred to SS set #5 with a larger search space ID.

[0133] Similarly, among the SS sets #1 to #3 other than the USS set for DCI format 0_2 / 1_2, the priorities of the SS sets #1 to #3 can also be determined based on the search space ID. Figure 9 In the example, the priorities of SS sets #1 to #3 are determined in ascending order of search space IDs.

[0134] When at least part of the monitoring opportunities of SS sets #1 to #5 overlap within the same time unit (e.g., time slot), the UE can also control the monitoring of SS sets #1 to #4 based on whether it is the USS set used for DCI format 0_2 / 1_2 and the search space ID.

[0135] In addition, Figure 9 In this example, the priorities of SS sets #1 through #3 are determined based on the search space ID, regardless of the search space type. However, this is not a limitation. The priorities of SS sets #1 through #3 can also be determined based on both the search space ID and the search space type. For example, the priority of the CSS set can be determined to be higher than the priority of the USS set. Among SS sets of the same search space type, the priorities of SS sets can be determined in ascending or descending order of search space ID.

[0136] As described above, in the third example, even when DCI format 0_2 / 1_2 is introduced, even if monitoring opportunities of one or more SS sets configured for a UE overlap, monitoring can be appropriately controlled according to the priority of the SS sets.

[0137] (Other methods)

[0138] In addition, the first and second methods can also be combined. Figure 2 SS setting information or Figure 4The second SS setting information, and Figure 6 or Figure 7 Combine the SS setting information.

[0139] Specifically, in Figure 2 and Figure 6 When combining SS setting information, Figure 6 The DCI format information (e.g., “dci-Formats” of RRC IE) within the USS set information (e.g., “ue-Specific” of RRC IE) may also specify one of DCI format 0_0 / 1_0, DCI format 0_1 / 1_1, and DCI format 0_2 / 1_2.

[0140] In addition, Figure 2 and Figure 7 When combining SS setting information, Figure 7 The DCI format information (e.g., “dci-Formats” of RRC IE) within the USS set information (e.g., “ue-Specific” of RRC IE) may also specify one of DCI format 0_0 / 1_0, DCI format 0_1 / 1_1, DCI format 0_2 / 1_2, and DCI format 2_4.

[0141] In addition, Figure 4 The second SS setting information and Figure 6 When combining SS setting information, Figure 4 The CSS set information (e.g., “common” in RRC IE) within the second SS setting information (e.g., “SearchSpace-v16” in RRC IE) may also include the above-mentioned DCI format 2_4 information (e.g., “dci-Format2-4” in RRC IE).

[0142] In addition, Figure 4 The second SS setting information and Figure 7 When combining SS setting information, Figure 4 The DCI format information (e.g., “dci-Formats” in RRC IE) within the USS set information (e.g., “ue-Specific” in RRC IE) within the second SS setting information (e.g., “SearchSpace-v16” in RRC IE) may also specify one of DCI formats 0_0 / 1_0, DCI format 0_1 / 1_1, DCI format 0_2 / 1_2, and DCI format 2_4.

[0143] In addition, the second mode and the third mode, or the first mode to the third mode may be combined. Figure 8 as well as Figure 9 Although the SS set used for DCI format 2_4 is not explicitly indicated, the priority of the SS set used for DCI format 2_4 can also be determined according to the above-mentioned first or second prioritization.

[0144] (Wireless Communication System)

[0145] 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 one or a combination of the wireless communication methods according to the above-described embodiments of the present disclosure.

[0146] Figure 10 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) or the fifth generation mobile communication system New Radio (5G NR).

[0147] 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.

[0148] 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.

[0149] 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)).

[0150] 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.

[0151] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0152] 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 correspond to a frequency band higher than FR2.

[0153] Furthermore, the user terminal 20 may communicate in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0154] 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.

[0155] 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).

[0156] The user terminal 20 may also be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] 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 PBCH can also be used to transmit master information blocks (MIBs).

[0162] 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.

[0163] 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, PDSCH may also be replaced by DL data, and PUSCH may also be replaced by UL data.

[0164] 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.

[0165] A search space may also correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. 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.

[0166] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., hybrid automatic repeat request acknowledgment (HARQ-ACK)), ACK / NACK, etc.), and a 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.

[0167] 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.

[0168] 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.

[0169] For example, a synchronization signal may be at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SSs (PSS, SSS) and PBCHs (and DMRS for PBCHs) may also be referred to as an SS / PBCH block or an SS block (SSB). Furthermore, SSs and SSBs may also be referred to as reference signals.

[0170] 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).

[0171] (Base Station)

[0172] Figure 11This 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.

[0173] 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.

[0174] 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.

[0175] 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.

[0176] 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.

[0177] 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.

[0178] 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.

[0179] 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.

[0180] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmit beam and a receive beam.

[0181] 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.

[0182] 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.

[0183] 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 .

[0184] 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 .

[0185] 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.

[0186] 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.

[0187] 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.

[0188] 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 .

[0189] In addition, the transceiver unit 120 transmits downlink control information. The transceiver unit 120 may also receive uplink signals (e.g., uplink shared channels) and transmit downlink signals (e.g., downlink shared channels). The transceiver unit 120 transmits search space set configuration information. The transceiver unit 120 may also transmit downlink control channel configuration information (e.g., UE-specific PDCCH information or cell-specific PDCCH information).

[0190] (User Terminal)

[0191] Figure 12 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, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided in one or more units.

[0192] 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.

[0193] 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.

[0194] 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.

[0195] 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.

[0196] 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.

[0197] 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.

[0198] 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.

[0199] 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.

[0200] 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.

[0201] 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.

[0202] 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.

[0203] 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 .

[0204] 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 .

[0205] 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.

[0206] 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.

[0207] 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 , the transmitting and receiving antenna 230 , and the transmission path interface 240 .

[0208] In addition, the transceiver unit 220 receives downlink control information. The transceiver unit 220 may also transmit uplink signals (e.g., uplink shared channels) and receive downlink signals (e.g., downlink shared channels). The transceiver unit 220 receives search space set configuration information (SS configuration information). The transceiver unit 220 may also receive downlink control channel configuration information (e.g., UE-specific PDCCH information or cell-specific PDCCH information).

[0209] The control unit 210 can also control the monitoring of downlink control information (DCI) in a first format other than formats 0_0 and 0_1 for scheduling uplink shared channels (for example, DCI format 0_2) and a second format other than formats 1_0 and 1_1 for scheduling downlink shared channels (for example, DCI format 1_2) in the search space set set based on the setting information (first method).

[0210] The setting information may also include information for specifying the formats 0_0 and 1_0, the formats 0_1 and 1_1, and one of the first and second formats as the format of the DCI monitored in the search space set (e.g., Figure 2 、 4 ).

[0211] Alternatively, the configuration information may be information for a specific search space set for monitoring the first and second formats (for example, Figure 3 ), or information used by the user terminal 20 that is assumed to monitor the first and second formats (for example, Figure 4 ).

[0212] The control unit 210 may determine the priority of the search space set based on at least one of the ID of the search space set and whether the first and second formats are monitored in the search space set (third approach).

[0213] The control unit 210 may also control monitoring of a third DCI format (eg, DCI format 2_4) in the search space set that is set based on the setting information and that includes an indication of uplink preemption (second method).

[0214] (Hardware Structure)

[0215] 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.

[0216] 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.

[0217] 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 13This 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.

[0218] 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 be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.

[0219] 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.

[0220] 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.

[0221] 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.

[0222] 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.

[0223] 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 one embodiment of the present disclosure.

[0224] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical / magnetic 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.

[0225] The communication device 1004 is hardware (a transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. To implement at least one of frequency division duplex (FDD) and time division duplex (TDD), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like. For example, the aforementioned transmitting and receiving unit 120 (220) 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 physically or logically separated from the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0226] 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).

[0227] 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.

[0228] 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). Such hardware may be used 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.

[0229] (Variation)

[0230] 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.

[0231] 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).

[0232] Here, a parameter set may also refer to communication parameters applied to at least one of the transmission and reception of a signal or channel. For example, a parameter set may also represent at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, and the like.

[0233] 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.

[0234] 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.

[0235] 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.

[0236] 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 the subframe and the 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 the TTI can also be called a time slot, a mini-time slot, etc. instead of a subframe.

[0237] 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.

[0238] 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.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] 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 can also be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers included in an RB can also be determined based on the parameter set.

[0243] 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.

[0244] 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.

[0245] 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.

[0246] 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 parameter set within a 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.

[0247] 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.

[0248] 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."

[0249] 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.

[0250] 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.

[0251] 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.

[0252] 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.

[0253] Furthermore, information, signals, etc. can be output from a higher layer (upper layer) to a lower layer (lower layer), or from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0254] Input and output information, signals, etc. can be stored in a specific location (e.g., memory) or managed using a management table. Input and output information, signals, etc. can be overwritten, updated, or appended. Output information, signals, etc. can also be deleted. Input information, signals, etc. can also be sent to other devices.

[0255] 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.

[0256] 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.

[0257] 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).

[0258] 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 comparison of numerical values ​​(for example, comparison with a specific value).

[0259] 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.

[0260] 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.

[0261] 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).

[0262] 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.

[0263] 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, a small cell, a femto cell, or a pico cell.

[0264] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entire coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within that coverage area.

[0265] In the present disclosure, terms such as “Mobile Station (MS)”, “user terminal”, “User Equipment (UE)”, and “terminal” are used interchangeably.

[0266] A mobile station is also sometimes referred to as a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other appropriate terminology.

[0267] 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 may also include a device that does not necessarily move when performing communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0268] 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, expressions such as "uplink" and "downlink" may also be replaced by expressions corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0269] 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.

[0270] In the present disclosure, actions are assumed to be performed by a base station, and sometimes, depending on the circumstances, by its upper node. Obviously, in a network including one or more network nodes including a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (for example, a Mobility Management Entity (MME)), a Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0271] 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.

[0272] The various modes and embodiments described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 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 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.).

[0273] 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.”

[0274] Any reference to an element using the designations "first," "second," etc., as used in this disclosure, does not necessarily define the quantity or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to a first and a second element does not necessarily imply that only two elements may be used, or that the first element necessarily takes precedence over the second element in some manner.

[0275] The term "determining" as used in this disclosure may encompass a variety of actions. 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.

[0276] 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.

[0277] In addition, "judgment (decision)" can also be regarded as a situation in which "judgment (decision)" is made on resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment (decision)" can also be regarded as a situation in which "judgment (decision)" is made on some actions.

[0278] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)”, etc.

[0279] The "maximum transmit power" recorded in this disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0280] 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."

[0281] 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.

[0282] 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."

[0283] 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.

[0284] 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.

[0285] 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, characterized in that: have: A receiving unit, receiving setting information of a search space set; as well as a control unit, based on the ID of the search space set and the type of the search space set, controlling monitoring of at least one of a first downlink control information format (i.e., a first DCI format) for scheduling an uplink shared channel and a second DCI format for scheduling a downlink shared channel in the search space set, The first DCI format is a format other than DCI formats 0_0 and 0_1, and the second DCI format is a format other than DCI formats 1_0 and 1_1. The control unit determines that, among the types of the search space sets, the monitoring in a common search space set (CSS) is prioritized over a UE-specific search space set (USS), The control unit prioritizes monitoring of the type of the search space set over monitoring of the ID of the search space set.

2. The terminal according to claim 1, wherein The control unit determines that the monitoring is prioritized in ascending order of the IDs of the search space sets.

3. A wireless communication method, used for a terminal, characterized in that: have: The step of receiving setting information of a search space set; and Based on the ID of the search space set and the type of the search space set, controlling monitoring of at least one of a first downlink control information format (i.e., a first DCI format) for scheduling an uplink shared channel and a second DCI format for scheduling a downlink shared channel in the search space set, The first DCI format is a format other than DCI formats 0_0 and 0_1, and the second DCI format is a format other than DCI formats 1_0 and 1_1. In the controlling step, it is determined that, among the types of the search space sets, the monitoring in a common search space set (CSS) is prioritized over a UE-specific search space set (USS), In the controlling step, a priority of monitoring the type of the search space set is given priority over a priority of monitoring the ID of the search space set.

4. A base station, characterized in that: have: A sending unit, sending setting information of a search space set; as well as a control unit configured to control, in a terminal, monitoring, based on the ID of the search space set and the type of the search space set, at least one of a first downlink control information format (i.e., a first DCI format) for scheduling an uplink shared channel and a second DCI format for scheduling a downlink shared channel in the search space set; The first DCI format is a format other than DCI formats 0_0 and 0_1, and the second DCI format is a format other than DCI formats 1_0 and 1_1. The control unit determines that, among the types of the search space sets, the monitoring in a common search space set (CSS) is prioritized over a UE-specific search space set (USS), The priority of monitoring the type of the search space set is prioritized over the priority of monitoring the ID of the search space set.

5. A system having a terminal and a base station, The terminal has: A receiving unit receives setting information of a search space set; and a control unit, based on the ID of the search space set and the type of the search space set, controlling monitoring of at least one of a first downlink control information format (i.e., a first DCI format) for scheduling an uplink shared channel and a second DCI format for scheduling a downlink shared channel in the search space set, The control unit determines that, among the types of the search space sets, the monitoring in a common search space set (CSS) is prioritized over a UE-specific search space set (USS), The control unit prioritizes monitoring of the type of the search space set over monitoring of the ID of the search space set, The base station has: a sending unit, which sends the setting information, The first DCI format is a format other than DCI formats 0_0 and 0_1, and the second DCI format is a format other than DCI formats 1_0 and 1_1.

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