Method and apparatus for monitoring signals in a wireless communication system

Abstract

In the wireless communication system according to the present invention, a method and apparatus for monitoring a signal monitors PDCCH candidates for a DCI format based on a search space set. The DCI format is monitored on a scheduling cell and schedules PDSCH or PUSCH on a plurality of scheduled cells.

Description

Technical Field

[0001] The present invention relates to a method and apparatus used in a wireless communication system.

Background Art

[0002] Wireless communication systems have been widely deployed to provide various communication services such as voice and data. Generally, a wireless communication system is a multiple access system that can share available system resources (such as bandwidth and transmission power) to assist communication with multiple users. Examples of multiple access systems include CDMA (Code Division Multiple Access) systems, FDMA (Frequency Division Multiple Access) systems, TDMA (Time Division Multiple Access) systems, OFDMA (Orthogonal Frequency Division Multiple Access) systems, SC-FDMA (Single Carrier Frequency Division Multiple Access) systems, and the like.

Summary of the Invention

Problems to be Solved by the Invention

[0003] A technical problem of the present invention is to provide a signal monitoring method and an apparatus therefor for efficiently monitoring control signals in a wireless communication system.

[0004] The technical problems of the present invention are not limited to the above-described technical problems, and other technical problems can be inferred from the embodiments of the present invention.

Means for Solving the Problems

[0005] The present invention provides a signal monitoring method and apparatus in a wireless communication system.

[0006] As one embodiment of the present invention, a method for a terminal to monitor a control signal in a wireless communication system, the method comprising: receiving a search space set configuration including information regarding the number of physical downlink control channel (PDCCH) candidates per set level of control channel elements (CCEs); and monitoring the PDCCH candidates for a downlink control information (DCI) format on a scheduling cell based on the search space set configuration, wherein the DCI format is a DCI format for scheduling a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH) on different scheduled cells, and the number of the PDCCH candidates is set based on all or some combinations of the scheduled cells, and the signal monitoring method is applied.

[0007] As another embodiment of the present invention, there are provided an apparatus, a processor, and a storage medium for performing the signal monitoring method.

[0008] The above apparatus includes at least a terminal, a network, and an autonomous vehicle capable of communicating with other autonomous vehicles other than the above apparatus.

[0009] The above-described embodiments of the present invention are only a part of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention can be derived and understood by those having ordinary knowledge in the art based on the detailed description of the present invention described below.

Advantages of the Invention

[0010] According to one embodiment of the present invention, when a control signal is monitored between communication devices, there is an advantage that more efficient signal monitoring can be performed by an operation different from that of the conventional invention.

[0011] The technical effects of the present invention are not limited to the above-described technical effects, and other technical effects can be inferred from the embodiments of the present invention.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Modes for Carrying Out the Invention

[0013] The following technologies can be used in various wireless connection systems such as CDMA, FDMA, TDMA, OFDMA, SC-FDMA, etc. CDMA can be implemented by radio technologies such as UTRA (Universal Terrestrial Radio Access) and CDMA2000. TDMA can be implemented by radio technologies such as GSM (Global System for Mobile communications) / GPRS (General Packet Radio Service) / EDGE (Enhanced Data Rates for GSM Evolution). OFDMA can be implemented by radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (Evolved UTRA), etc. UTRA is part of UMTS (Universal Mobile Telecommunications System). 3GPP (registered trademark) (3rd Generation Partnership Project) LTE (long term evolution) is part of E-UMTS (Evolved UMTS) that uses E-UTRA, and LTE-A / LTE-A pro is an evolved version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A / LTE-A pro.

[0014] For the sake of clearer explanation, the description will be based on the 3GPP communication system (e.g., LTE-A, NR), but the technical idea of the present invention is not limited thereto. LTE means the technology after 3GPP TS 36.xxx Release 8. Specifically, the LTE technology after 3GPP TS 36.xxx Release 10 is called LTE-A, and the LTE technology after 3GPP TS 36.xxx Release 13 is called LTE-A pro. 3GPP NR means the technology after TS 38.xxx Release 15. LTE / NR can also be referred to as the 3GPP system. "xxx" means the detailed number of the standard document. LTE / NR is referred to as the 3GPP system. For the background technology, terms, abbreviations, etc. used in the description of the present invention, reference can be made to the matters described in the standard documents published before the present invention. For example, the following documents can be referred to.

[0015] 3GPP NR

[0016] -38.211: Physical channels and modulation

[0017] -38.212: Multiplexing and channel coding

[0018] -38.213: Physical layer procedures for control

[0019] -38.214: Physical layer procedures for data

[0020] -38.300: NR and NG-RAN Overall Description

[0021] -38.331: Radio Resource Control(RRC) protocol specification

[0022] FIG. 1 illustrates the structure of a radio frame used in NR.

[0023] In NR, uplink and downlink transmissions are composed of frames. A radio frame has a length of 10 ms and is defined as two 5 - ms half - frames (HF). A half - frame is defined as five 1 - ms sub - frames (SF). A sub - frame is divided into one or more slots, and the number of slots in a sub - frame depends on the sub - carrier spacing (SCS). Each slot contains 12 or 14 OFDM(A) symbols by means of a cyclic prefix (CP). When normal CP is used, each slot contains 14 symbols. When extended CP is used, each slot contains 12 symbols. Here, the symbol can include an OFDM symbol (or a CP - OFDM symbol), an SC - FDMA symbol (or a DFT - s - OFDM symbol).

[0024] Table 1 illustrates that when normal CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per sub - frame change according to the SCS.

[0025] [Table 1]

[0026] Table 2 illustrates that when extended CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per sub - frame change according to the SCS.

[0027] [Table 2]

[0028] In the NR system, OFDM(A) numerologies (e.g., SCS, CP length, etc.) are set to be different among multiple cells merged into one terminal (User Equipment; UE). As a result, the (absolute time) intervals of time resources (e.g., SF, slot, or TTI) (collectively referred to as TU (Time Unit) for convenience) composed of the same number of symbols are different among the merged cells.

[0029] NR supports a number of OFDM (Orthogonal Frequency Division Multiplexing) numerologies (e.g., subcarrier spacing, SCS) to support various 5G services. For example, when the SCS is 15 kHz, it supports a wide area in traditional cellular bands, and when the SCS is 30 kHz / 60 kHz, it supports dense-urban areas, lower latency, and wider carrier bandwidth.

[0030] The NR frequency band is defined by two types of frequency ranges (FR1 / FR2). FR1 / FR2 is configured as shown in Table 3 below. Also, FR2 means millimeter wave (mmW).

[0031]

Table 3

[0032] Figure 2 illustrates the slot structure of the NR frame.

[0033] A slot contains a plurality of symbols in the time domain. For example, in the case of normal CP, one slot contains 14 symbols, while in the case of extended CP, one slot contains 12 symbols. A carrier contains a plurality of subcarriers in the frequency domain. An RB (Resource Block) is defined as a plurality (e.g., 12) of consecutive subcarriers in the frequency domain. In the frequency domain, a plurality of RB interleaves (simply, interleaves) are defined. An interleave m ∈ {0, 1,..., M - 1} is composed of (common) RBs {m, M + m, 2M + m, 3M + m,...}. M indicates the number of interleaves. A BWP (Bandwidth Part) is defined as a plurality of consecutive PRBs (Physical RBs) in the frequency domain and can correspond to one numerology (e.g., SCS, CP length, etc.). A carrier contains a maximum of N (e.g., 5) BWPs. Data communication is performed on the activated BWP, and only one BWP is activated for one terminal. Each element in the resource grid is referred to as a resource element (RE), and one modulation symbol can be mapped to it.

[0034] In a wireless communication system, a terminal receives information from a base station via the downlink (DL), and the terminal transmits information to the base station via the uplink (UL). The information transmitted and received by the base station and the terminal includes data and various control information, and various physical channels / signals exist depending on the type / usage of the information they transmit and receive. A physical channel corresponds to a set of resource elements (REs) that carry information derived from the upper layer. A physical signal corresponds to a set of resource elements (REs) used by the physical layer (PHY) but does not carry information derived from the upper layer. The upper layer includes the MAC (Medium Access Control) layer, RLC (Radio Link Control) layer, PDCP (Packet Data Convergence Protocol) layer, RRC (Radio Resource Control) layer, etc.

[0035] The DL physical channels include PBCH (Physical Broadcast channel), PDSCH (Physical Downlink Shared channel), and PDCCH (Physical Downlink Control channel). The DL physical signals include DL RS (Reference Signal), PSS (Primary synchronization signal), and SSS (Secondary synchronization signal). The DL RS includes DM-RS (Demodulation RS), PT-RS (Phase-tracking RS), and CSI-RS (channel-state information RS). The UL physical channels include PRACH (Physical Random Access Channel), PUSCH (Physical Uplink Shared Channel), and PUCCH (Physical Uplink Control Channel). The UL physical signals include UL RS. The UL RS includes DM-RS, PT-RS, and SRS (Sounding RS).

[0036] Figure 3 shows an example of the mapping of physical channels within a slot.

[0037] One slot contains all of the DL control channel, DL or UL data, UL control channel, etc. For example, the first N symbols in the slot are used for transmitting the DL control channel (hereinafter, DL control region), and the last M symbols in the slot are used for transmitting the UL control channel (hereinafter, UL control region). N and M are each integers of 0 or more. The resource region (hereinafter, data region) between the DL control region and the UL control region is used for transmitting DL data or for transmitting UL data. There is a time gap for DL-to-UL or UL-to-DL switching between the control region and the data region. In the DL control region, PDCCH is transmitted, and in the DL data region, PDSCH is transmitted. Some symbols at the time of conversion from DL to UL within the slot are used as the time gap.

[0038] In the present invention, the base station is, for example, a gNodeB.

[0039] Downlink (DL) physical channel / signal

[0040] (1) PDSCH

[0041] The PDSCH carries downlink data (e.g., DL-shared channel transport block, DL-SCH TB). After the TB is encoded into codewords (CWs), it is transmitted through processes such as scrambling and modulation. A CW contains one or more code blocks (CBs). One or more CBs are grouped into one CB group (CBG). Depending on the cell configuration, the PDSCH can carry up to two CWs. Scrambling and modulation are performed for each CW, and the modulation symbols generated from each CW are mapped to one or more layers. Each layer is mapped to a resource together with DMRS through precoding and transmitted on the corresponding antenna port. The PDSCH is dynamically scheduled by the PDCCH (dynamic scheduling), or semi-statically scheduled (Configured Scheduling, CS) based on higher layer (e.g., RRC) signaling (and / or Layer 1 (L1) signaling (e.g., PDCCH)). Therefore, PDCCH is associated with PDSCH transmission in dynamic scheduling, but not in CS. CS includes semi-persistent scheduling (SPS).

[0042] (2) PDCCH

[0043] The PDCCH carries DCI (Downlink Control Information). For example, the PCCCH (i.e., DCI) carries the transmission format of the DL-SCH and resource allocation, frequency / time resource allocation information for the UL-SCH (shared channel), paging information regarding the PCH (paging channel), system information on the DL-SCH, frequency / time resource allocation information regarding higher layer control messages such as any connection response (RAR) transmitted on the PDSCH, transmission power control commands, and information regarding the activation / deactivation of SPS / CS (Configured Scheduling). Various DCI formats are provided by the information in the DCI.

[0044] Table 4 illustrates the DCI formats transmitted via the PDCCH.

[0045]

Table 4

[0046] DCI format 0_0 is used to schedule TB-based (or TB-level) PUSCH, and DCI format 0_1 is used to schedule TB-based (or TB-level) PUSCH or CBG (Code Block Group)-based (or CBG-level) PUSCH. DCI format 1_0 is used to schedule TB-based (or TB-level) PDSCH, and DCI format 1_1 is used to schedule TB-based (or TB-level) PDSCH or CBG-based (or CBG-level) PDSCH (DL grant DCI). DCI formats 0_0 / 0_1 are referred to as UL grant DCI or UL scheduling information, and DCI formats 1_0 / 1_1 are referred to as DL grant DCI or UL scheduling information. DCI format 2_0 is used to transmit dynamic slot format information (e.g., dynamic SFI) to the terminal, and DCI format 2_1 is used to transmit downlink pre-emption information to the terminal. DCI format 2_0 and / or DCI format 2_1 are transmitted to the terminals within the corresponding group via the group common PDCCH, which is a PDCCH transmitted to the terminals defined as one group.

[0047] The PDCCH / DCI contains a CRC (cyclic redundancy check), and the CRC is masked / scrambled with various identifiers (e.g., Radio Network Temporary Identifier, RNTI) according to the owner or usage purpose of the PDCCH. For example, if the PDCCH is for a specific terminal, the CRC is masked with a C-RNTI (Cell-RNTI). If the PDCCH is related to paging, the CRC is masked with a P-RNTI (Paging-RNTI). If the PDCCH is related to system information (e.g., System Information Block, SIB), the CRC is masked with an SI-RNTI (System Information RNTI). If the PDCCH is related to a random access response, the CRC is masked with an RA-RNTI (Random Access-RNTI).

[0048] Table 5 illustrates the uses and transmission channels of the PDCCH by RNTI. The transmission channel indicates the transmission channel related to the data carried by the PDSCH / PUSCH scheduled by the PDCCH.

[0049]

Table 5

[0050] The modulation method of the PDCCH is fixed (e.g., Quadrature Phase Shift Keying, QPSK), and one PDCCH is composed of 1, 2, 4, 8, or 16 CCEs (Control Channel Elements) according to the AL (Aggregation Level). One CCE is composed of 6 REGs (Resource Element Groups). One REG is defined by one OFDM symbol and one (P)RB.

[0051] The PDCCH is transmitted on a CORESET (Control Resource Set). A CORESET corresponds to a set of physical resources / parameters used to carry PDCCH / DCI within a BWP. For example, a CORESET includes a set of REGs having a predetermined numerology (e.g., SCS, CP length, etc.). A CORESET is configured by system information (e.g., MIB) or UE-specific upper layer (e.g., RRC) signaling. Examples of parameters / information used for configuring a CORESET are as follows. One or more CORESETs are configured for one terminal, and multiple CORESETs are superimposed in the time / frequency domain.

[0052] - controlResourceSetId: Indicates the identification information (ID) of the CORESET.

[0053] - frequencyDomainResources: Indicates the frequency domain resources of the CORESET. It is indicated by a bitmap, and each bit corresponds to an RB group (= 6 consecutive RBs). For example, the MSB (Most Significant Bit) of the bitmap corresponds to the first RB group within the BWP. The RB groups corresponding to the bits with a bit value of 1 are allocated as the frequency domain resources of the CORESET.

[0054] - duration: Indicates the time domain resources of the CORESET. It indicates the number of consecutive OFDMA symbols constituting the CORESET. For example, duration has values from 1 to 3.

[0055] - cce-REG-MappingType: Indicates the CCE-to-REG mapping type. Interleaved type and non-interleaved type are supported.

[0056] - precoderGranularity: Indicates the precoder granularity in the frequency domain.

[0057] - tci-StateSPDCCH: Indicates information (e.g., TCI-StateID) indicating the TCI (Transmission Configuration Indication) state for the PDCCH. The TCI state is used to provide a Quasi-Co-Location (QCL) relationship between DL RSs and PDCCH DMRS ports in an RS set (TCI-State).

[0058] - tci-PresentInDCI: indicates whether the TCI field in the DCI is included or not.

[0059] - pdcch-DMRS-ScramblingID: indicates information used for initialization of the PDCCH DMRS scrambling sequence.

[0060] For PDCCH reception, the terminal monitors a set of PDCCH candidates in the CORESET (e.g., blind decoding). The PDCCH candidates indicate the CCEs that the terminal monitors for PDCCH reception / detection. PDCCH monitoring is performed in one or more CORESETs on an active DL BWP on each activated cell where PDCCH monitoring is configured. The set of PDCCH candidates that the terminal monitors is defined as a PDCCH Search Space (SS) set. The SS set is a Common Search Space (CSS) set or a UE-specific Search Space (USS) set.

[0061] Table 6 illustrates the PDCCH search space.

[0062] [Table 6]

[0063] The SS set is configured by system information (e.g., MIB) or terminal - specific (UE - specific) upper - layer (e.g., RRC) signaling. Each DL BWP of the serving cell is configured with up to S (e.g., 10) SS sets. For example, the following parameters / information are provided for each SS set. Each SS set is associated with one CORESET, and each CORESET configuration is associated with one or more SS sets.

[0064] - searchSpaceId: Indicates the ID of the SS set.

[0065] - controlResourceSetId: Indicates the CORESET associated with the SS set.

[0066] - monitoringSlotPeriodicityAndOffset: Indicates the PDCCH monitoring periodicity interval (in slots) and the PDCCH monitoring interval offset (in slots).

[0067] - monitoringSymbolsWithinSlot: Indicates the first OFDMA symbol for PDCCH monitoring within the slot where PDCCH monitoring is configured. It is indicated by a bitmap, and each bit corresponds to an OFDMA symbol within the slot. The MSB of the bitmap corresponds to the first OFDM symbol within the slot. The OFDMA symbol corresponding to the bit with a value of 1 corresponds to the first symbol of the CORESET within the slot.

[0068] - nrofCandidates: Indicates the number of PDCCH candidates (e.g., any of 0, 1, 2, 3, 4, 5, 6, 8) for each AL = {1, 2, 4, 8, 16}.

[0069] - searchSpaceType: Indicates whether the SS type is CSS or USS.

[0070] - DCI format: Indicates the DCI format of PDCCH candidates.

[0071] Based on the CORESET / SS set configuration, the terminal can monitor PDCCH candidates in one or more SS sets within a slot. An opportunity (e.g., time / frequency resource) to monitor PDCCH candidates is defined as a PDCCH (monitoring) opportunity. One or more PDCCH (monitoring) opportunities are configured within a slot.

[0072] DCI for scheduling PDSCHs or PUSCHs on multiple serving cells

[0073] The above-described content can be applied in combination with the method proposed in the following present invention, and the technical features of the method proposed in this invention can be clarified.

[0074] The method described later can also be similarly applied to the above-described NR system (licensed band) or shared spectrum, and can be deformed or substituted in accordance with terms, expressions, structures, etc. defined in each system so that the technical idea proposed in this specification is also embodied in the corresponding system.

[0075] In the CA situation where multiple cells are configured, in order to reduce the DCI overhead related to PDSCH / PUSCH scheduling, in Rel-18 (based on the justification as shown in Table 7), a multi-cell scheduling (multi-CC scheduling) method of simultaneously scheduling multiple serving cells / CCs by a single DCI is considered. In the present invention, the expression "scheduling multiple cells" is understood to mean "scheduling PDSCH or PUSCH transmitted from each of the multiple cells". In other words, a multi-cell DCI is a DCI for scheduling PDSCH or PUSCH on multiple different cells.

[0076] Table 7 is understood as one of the justifications for supporting the DCI for the aforementioned purpose in Rel-18 and as one of the motivations for the necessity of introducing such DCI (PDCCH).

[0077]

Table 7

[0078] Here, in the present invention, a method for PDCCH monitoring for DCI (multi-cell DCI) that performs multi-cell scheduling as described above and methods such as setting related PDCCH candidates are proposed.

[0079] In the proposed method described later, for the sake of convenience of explanation, DCI that performs multi-cell scheduling is denoted as m-cc DCI, and DCI that performs conventional single-cell scheduling is denoted as s-cc DCI. Also, DCI that schedules PDSCH and DCI that schedules PUSCH are not distinguished and are denoted as m-cc DCI or s-cc DCI. The scheduled PDSCH and / or PUSCH are denoted as PDSCH / PUSCH (or, PxSCH) as the case may be.

[0080] In the specification, the expression "cell" is interpreted according to the context. For example, a cell means a serving cell. Also, a cell can be composed of one DL CC (component carrier) and 0 to 2 UL CCs, but the method described below is not limited to this. Unless otherwise specified in the expressions described below, "cell" and "CC" can be used interchangeably. Also, a cell / CC can be replaced with an (active) BWP within the serving cell. Also, unless otherwise explicitly stated, in the method described below, a cell / CC is used as a concept that includes a P cell (PCell, primary cell), an S cell (SCell, secondary cell), a PS cell (PSCell, primary SCell), etc. set / expressed in a CA (carrier aggregation) / DC (dual connectivity) scenario.

[0081] A cell (or CC) that schedules PDSCH / PUSCH (DL assignment or UL grant) is expressed as a scheduling cell (scheduling Cell or scheduling CC), and a cell in which the PDSCH / PUSCH scheduled by that scheduling cell is actually transmitted is expressed as a scheduled cell (scheduled cell or scheduled CC). The case where the scheduling cell and the scheduled cell are the same is called self-carrier scheduling, and the case where they are different is called cross-carrier scheduling.

[0082] Tables 8 and 9 show the IEs (information elements) related to cross-carrier scheduling described in 3GPP TS 38.331.

[0083]

Table 8

[0084]

Table 9

[0085] In the NR system, the CCS configuration is set by the CrossCarrierSchedulingConfig, which is a higher-layer parameter, as shown in Tables 8 and 9. A CIF (carrier indicator field) value is set in the DCI (e.g., DCI format 0_1 / 0_2 / 1_1 / 1_2) that schedules the PDSCH or PUSCH. The value is 0 for its own cell and has values from 1 to 7 for other cells (set by cif-InSchedulingCell). Also, as shown in Table 10, the set CIF value is utilized to determine PDCCH candidates corresponding to the n_CI value. At this time, the PDCCH monitoring corresponding to the search space set (SS set) set for the scheduled cell is performed with a PDCCH MO (monitoring occasion) linked to the search space set having the same index as that SS set in the scheduling cell. Also, the number of PDCCH candidates for each aggregation level (AL) set in that SS set of the scheduled cell is inherited as it is, and when performing PDCCH monitoring on the scheduled cell in that SS set on the scheduling cell, the number of those PDCCH candidates is applied. The PDCCH MO is determined for each SS set s within the CORESET p. Up to 10 SS sets are associated with one CORESET and are identified by their respective SS set indices.

[0086]

Table 10-1

Table 10-2

[0087] As an example, for cell #1 and cell #2, the SS set #s is set as follows.

[0088] - SS set #s set for cell #1: The number of PDCCH candidates for a specific AL n is set to N_1(n).

[0089] - SS set #s set for cell #2: The number of PDCCH candidates for a specific AL n is set to N_2(n).

[0090] At this time, when cross - carrier scheduling is set to determine the scheduling cell for cell #2 as cell #1, the terminal performs PDCCH monitoring as follows in the PDCCH MOs set in the SS set #s on cell #1. Specifically, the PDCCH transmitted on cell #1 can schedule the data (e.g., PDSCH or PUSCH) transmitted on cell #2, and the relationship set between cell #1 and cell #2 described above is, for convenience, referred to as the CCS relationship. Also, PDCCH monitoring means monitoring PDCCH candidates.

[0091] - For the DCI format set in the SS set #s of cell #1, monitor N_1(n) PDCCH candidates for each AL n

[0092] - For the DCI format set in the SS set #s of cell #2, monitor N_2(n) PDCCH candidates for each AL n

[0093] For the methods described later, the values proposed / calculated by each method (e.g., the number of PDCCH candidates for each scheduled cell or the BD counting method or the BD budget or when multiplying or dividing a predetermined value to give a weighted value, etc.) are applied as integer values by the ceil or floor function (even if not specifically explained).

[0094] [1] Operation method of m-cc DCI and s-cc DCI

[0095] In a scenario such as a CA composed of M cells (cell♯1 to cell♯M, where M is an integer greater than or equal to 1), when the connection relationship between the scheduling cell and other cells (for example, the CCS relationship is set), for the m-cc DCI that schedules multiple cells simultaneously and the s-cc DCI that schedules one cell, any one of the following options is set / applied. For the sake of convenience of explanation, one cell is represented as cell♯k (in this case, k means cell index or k-th cell), and a set of two or more cells is represented using the symbol {}. For example, {cell♯1, cell♯2} means cell♯1 and cell♯2. Any set of M cells is represented as {{cell♯m}, M}. In this case, cell♯m means each cell within the set (m = 1,..., M).

[0096] 1.1-1 Option 1: The m-cc DCI is defined to always schedule {{cell♯m}, M}. At this time, M means an integer greater than or equal to 2. In other words, multiple cells are always scheduled by the m-cc DCI, and the operation of scheduling only one cell by the m-cc DCI is not allowed. Cell♯m is either the scheduling cell that receives the m-cc DCI (PDCCH) or the scheduled cell scheduled by the m-cc DCI.

[0097] 1.1-1a Option 1a: The m-cc DCI is defined to always schedule {{cell♯m}, M}. At this time, M means an integer greater than or equal to 2. Cell♯m becomes the scheduled cell scheduled by the m-cc DCI.

[0098] 1.1-2 Option 2: The m-cc DCI is defined to schedule {{cell♯m},M} or one of the cells (ref-cc) among {{cell#m},M}. In other words, depending on the m-cc DCI, multiple cells may be scheduled simultaneously (multi-cell scheduling), or only one cell may be scheduled (single-cell scheduling). At this time, that one cell may be fixed to a specific cell (ref-cc). For other cells that are not the specific cell, single-cell scheduling by the m-cc DCI is not allowed. At this time, M means an integer of 2 or more. Cell♯m is the scheduling cell that receives the m-cc DCI (PDCCH) or becomes the scheduled cell scheduled by the m-cc DCI. The reference CC (ref-cc) means one specific cell among {{cell#m},M} and is predefined or set implicitly or explicitly.

[0099] - Method of predefining or implicitly setting ref-cc: The cell with the lowest (or highest) index among {{cell#m},M} becomes ref-cc. Alternatively, if a cell such as PCell, PSCell, or PUCCH SCell is included in the set, that cell becomes ref-cc. Alternatively, the scheduling cell is selected as ref-cc.

[0100] - Method of explicitly setting ref-cc: It is set semi-statically by upper layer signaling such as RRC or MAC-CE, or dynamically by DCI.

[0101] 1.1-2a Option 2a: The m-cc DCI is defined to schedule {{cell#m},M} or to schedule one of the cells (ref-cc) among {{cell#m},M}, where M means an integer greater than or equal to 2. At this time, cell #m becomes the scheduled cell scheduled by the m-cc DCI. Ref-cc means one specific cell among {{cell#m},M} and is predefined or set implicitly or explicitly. As a method for setting ref-cc, the method of 1.1-2 Option 2 is used.

[0102] 1.1-3 Option 3: The m-cc DCI is defined to schedule {{cell#m},M}, where M means an integer greater than or equal to 1. In other words, depending on the m-cc DCI, a plurality of cells may be scheduled simultaneously or only one cell may be scheduled. Different from the 1.1-2 Option 2, the one cell does not have to be fixed to a specific cell (ref-cc). Cell #m is the scheduling cell that receives the m-cc DCI (PDCCH) or becomes the scheduled cell scheduled by the m-cc DCI.

[0103] 1.1-3a Option 3a: The m-cc DCI is defined to schedule {{cell#m},M}, where M means an integer greater than or equal to 1. Cell #m becomes the scheduled cell scheduled by the m-cc DCI.

[0104] For each of the above Options, the operation of the terminal's PDCCH monitoring in the cell that schedules the m-cc DCI (PDCCH) is defined as follows.

[0105] 1.1-1 Option 1: The terminal expects to receive the m-cc DCI configured in the said 1.1-1 Option 1. Also, the terminal expects to receive the s-cc DCI for self-scheduling or cross-carrier scheduling of each cell belonging to {{cell#m},M} that is set as the target of m-cc DCI scheduling.

[0106] 1.1-1a Option 1a: The terminal expects to receive the m-cc DCI configured in the said 1.1-1a Option 1a. Also, the terminal expects to receive the s-cc DCI for cross-carrier scheduling of one cell among {{cell#m},M} or for self-scheduling of its scheduling cell.

[0107] 1.1-2 Option 2: The terminal expects to receive the m-cc DCI configured in the said 1.1-2 Option 2. Also, the terminal expects to receive the s-cc DCI for self or cross-carrier scheduling of the other cells belonging to {{cell#m},M} that are set as the target of m-cc DCI scheduling, excluding the said specific ref-cc.

[0108] 1.1-2a Option 2a: The terminal expects to receive the m-cc DCI configured in the said 1.1-2a Option 2a. Also, the terminal expects to receive the s-cc DCI for cross-carrier scheduling of one cell among {{cell#m},M} or for self-scheduling of its scheduling cell.

[0109] 1.1-3 Option 3: The terminal expects to receive the m-cc DCI configured in the said Option 3. At this time, the terminal does not expect to receive the s-cc DCI for self or cross-carrier scheduling of any cell belonging to {{cell#m},M} that is set as the target of m-cc DCI scheduling.

[0110] 1.1-3a Option 3a: The terminal expects to receive the m-cc DCI configured in the said 1.1-3a Option 3a. Also, the terminal expects to receive the s-cc DCI for self-scheduling its scheduling cell. At this time, the terminal does not expect to receive the s-cc DCI for cross-carrier scheduling for any one cell among {{cell#m},M}.

[0111] The proposed method described below is characteristically applied to each of the said options.

[0112] [2] Method for setting the number of PDCCH candidates for each AL for monitoring m-cc DCI

[0113] In the NR system, for each cell, the number of PDCCH candidates is set for each CCE AL (aggregation level) for each SS set #s by the SS set configuration. In a scenario such as CA composed of M cells {{cell#m},M}, a concatenation relationship (e.g., CCS relationship) is set for the scheduling cell and other cells. At this time, an SS set is set in which a concatenation relationship (e.g., CCS relationship, etc.) for the scheduling cell and the scheduled cell scheduled by the m-cc DCI is set. The number of PDCCH candidates for each AL n set by that SS set is denoted as PC_m(n). AL n is 1, 2, 4, 8, 16, but is not limited thereto.

[0114] For a plurality of scheduled CCs scheduled simultaneously by the m-cc DCI, the reference unit for the SS set configuration and / or the setting of the number of PDCCH candidates (PC_m(n)) for each AL n is any one of the following three. The proposed operation for the case where M cells {{cell#m},M} are set as the target of the m-cc DCI scheduling is described.

[0115] 2.1 Reference Unit 1: For the m-cc DCI, an SS set #s is set, and PC_m(n) is set for that SS set #s. In this case, the SS set and PC_m(n) are set for all CC combinations (the entire CC set belonging here) that can be scheduled simultaneously by the m-cc DCI. That is, the SS set and PC_m(n) for that m-cc DCI itself are set. For example, for an m-cc DCI that can schedule up to {cell#1, cell#2, cell#3} simultaneously, when scheduling {cell#1, cell#2} and when scheduling {cell#2, cell#3}, without distinction, the SS set #s and / or PC_m(n) for that m-cc DCI are set.

[0116] 2.2 Reference Unit 2: For each CC combination that can be scheduled simultaneously by the m-cc DCI, the SS set and / or PC_m(n) are set. For example, for an m-cc DCI that can schedule up to {cell#1, cell#2, cell#3} simultaneously, for the case of scheduling {cell#1, cell#2}, SS set #s_A and / or PC_m(n)_A are set, and for the case of scheduling {cell#2, cell#3}, SS set #s_B and / or PC_m(n)_B are set. As another example, when one CC is scheduled by the m-cc DCI, for example, for the case of scheduling {cell#3}, SS set #s_C and / or PC_m(n)_C are set, and when all three CCs are scheduled, that is, when {cell#1, cell#2, cell#3} are scheduled, SS set #s_D and / or PC_m(n)_D are set.

[0117] 2.3 Reference Unit 3: For each CC schedulable by m-cc DCI, an SS set and / or PC_m(n) is set. For example, for an m-cc DCI that can schedule up to {cell#1, cell#2, cell#3} simultaneously, when {cell#1, cell#2} is scheduled, the SS set#s_1 and / or PC_m(n)_1 for cell#1 are set individually, and the SS set#s_2 and / or PC_m(n)_2 for cell#2 are set individually (or the SS set#s_3 and / or PC_m(n)_3 for cell#3 are also set individually).

[0118] For each of the following proposed methods, the SS set for m-cc DCI and / or the PC_m(n) setting for AL n are applied independently for any one of the aforementioned reference unit 1, reference unit 2, and reference unit 3.

[0119] For the setting of the number of PDCCH candidates for each AL of m-cc DCI, any one of the following methods is applied. When it is said that "PC_m(n) of m-cc DCI" is set below, it means that PC_m(n) is set for each such unit based on any one of the proposed reference units 1 / 2 / 3. At this time, for the scheduling cell and the scheduled cells scheduled by m-cc DCI (e.g., in relation to CCS, etc.), an SS set#s is set for each scheduled cell with a connection relationship set.

[0120] 2.1 Method 1: Set another SS set♯s’ (different from the said SS set♯s) corresponding to the m-cc DCI on the scheduling cell, and the PC_m(n) of the m-cc DCI is set for each AL by that SS set♯s’. This may be understood as a method by which the PC_m(n) for the m-cc DCI is set by the RRC IE SearchSpace (separate from the number of PDCCH candidates set for the scheduled cell). That is, the SS set set for the m-cc DCI is different from the SS set set for the s-cc DCI, and the number of PDCCH candidates for each AL in each of those SS sets is set independently.

[0121] 2.2 Method 2: The PC_m(n) of the m-cc DCI is set separately for each AL on the same SS set♯s. This may be understood as a method by which the PC_m(n) for the m-cc DCI is set by the RRC IE SearchSpace (separate from the number of PDCCH candidates for each AL n set for the scheduled cell). That is, the SS set is shared between the m-cc DCI and the s-cc DCI, but the number of PDCCH candidates for each AL for the m-cc DCI is set individually.

[0122] 2.3 Method 3: Among the scheduled cells scheduled by m-CC DCI, for each AL n of a specific representative cell, the PC_m(n) of m-CC DCI is set on the SS set♯s based on the number of PDCCH candidates. For example, the PC_m(n) of m-cc DCI is set to be the same as or a part of the number of PDCCH candidates for each AL n of its representative cell. At this time, being set as a part means a specific ratio of the number of PDCCH candidates for each AL n of its representative cell. The specific ratio is predefined or set (e.g., upper layer signaling). At this time, the specific ratio varies according to the number of CCs actually scheduled by m-cc DCI. In this method, the representative cell may be one of the cells {{cell#m},M} set as the target of m-cc DCI scheduling, or may be determined using the ref-cc setting method described in [1] above. Alternatively, a cell in which the minimum value or the maximum value among the number of PDCCH candidates for each AL n of each scheduled CC is set is assumed as the representative cell, and the minimum value or the maximum value is set as the PC_m(n) for m-cc DCI.

[0123] 2.4 Method 4: Based on the sum of the number of PDCCH candidates for each scheduled cell scheduled by m-CC DCI for each AL n, PC_m(n) of m-CC DCI is set on the SS set #s. For example, when four cells (cell #1 to cell #4) are simultaneously scheduled by m-cc DCI, if the number of PDCCH candidates for each cell is PC_1(n), PC_2(n), PC_3(n), and PC_4(n), then PC_m(n) of m-cc DCI is set to be the same as or a part of the PC_1(n)+PC_2(n)+PC_3(n)+PC_4(n) value. At this time, being a part means a specific ratio, and that specific ratio is predefined or set (for example, upper layer signaling). At this time, the specific ratio varies according to the number of CCs actually scheduled by m-cc DCI. For example, when four CCs are actually scheduled, PC_m(n) is determined to be (PC_1(n)+PC_2(n)+PC_3(n)+PC_4(n)) / 4, and when two CCs are actually scheduled, PC_m(n) is determined to be (PC_1(n)+PC_2(n)) / 2.

[0124] 2.5 Method 5: Based on the weighted sum of the number of PDCCH candidates for each AL n of each scheduled cell scheduled by m-CC DCI, PC_m(n) of m-CC DCI is set on SS set #s. For example, when three cells (cell #1 to cell #3) are simultaneously scheduled by m-cc DCI, and the number of PDCCH candidates for each cell is denoted as PC_1(n), PC_2(n), and PC_3(n), PC_m(n) of m-cc DCI is set to be the same as or a part of the value of c1*PC_1(n)+c2*PC_2(n)+c3*PC_3(n). Here, c1, c2, and c3 are constants determined to be the same or different for each cell. At this time, being set in part means a specific ratio, and that specific ratio is predefined or set (e.g., upper layer signaling). At this time, the specific ratio is different according to the number of CCs actually scheduled by m-cc DCI. For example, when there are three CCs, PC_m(n) is set to (c1*PC_1(n)+c2*PC_2(n)+c3*PC_3(n)) / 3, and when there are two CCs, PC_m(n) is set to (c1*PC_1(n)+c2*PC_2(n)) / 2.

[0125] The above Methods 1 / 2 / 3 / 4 / 5 are each applied independently or applied together.

[0126] The above Methods 3 / 4 / 5 assume [Method 2] (that is, assume the case where s-cc DCI and m-cc DCI set the same SS set), but like [Method 1], the above Methods 3 / 4 / 5 can also be applied when the SS set for s-cc DCI and the SS set for m-cc DCI are set separately.

[0127] [3] Calculation method of the number of PDCCH candidates for each AL per CC for m-cc DCI

[0128] In an NR system that only allows conventional s-cc scheduling, the number of PDCCH candidates is set for each cell. Also, for each cell, the maximum number of PDCCH candidates that a terminal can monitor (blind detection) during a specific time interval and / or the maximum number of non-overlapped CCEs are defined. As a result, for each scheduled cell where the terminal monitors the PDCCH, the terminal does not expect an SS set configuration that exceeds this number, or (in the case of the PCell), if it exceeds this number, another dropping method is applied. At this time, the time interval is in units of slots, spans, or slot-groups according to the PDCCH monitoring capability.

[0129] In the case of m-cc DCI, since there can be multiple scheduled cells, the number of PDCCH candidates for each AL n set in the m-cc DCI is, as shown in [2], in the unit of the whole scheduled CC (the reference unit 1), in the unit of the combination of scheduled CCs (the reference unit 2), or in the unit of the scheduled CC (the reference unit 3). If, as described later in [4], the BD / CCE limit for the m-cc DCI is defined in multiple CC units, overbooking / dropping may be performed in the defined unit, but even if [the reference unit 1] or [the reference unit 2] is applied, the BD / CCE limit may be checked for each individual CC. For this purpose, a method for calculating the number of PDCCH candidates for each scheduled cell needs to be determined.

[0130] In a scenario such as a CA composed of M cells {{cell#m}, M}, when the connection relationship (e.g., CCS relationship) between the scheduling cell and other cells is set, for the setting of the number of PDCCH candidates per AL n for each scheduled cell scheduled by the m-cc DCI, any one of the following methods is applied. At this time, PC_m(n) for AL n of the m-cc DCI has different meanings according to the reference units 1 / 2 / 3. In the case of [reference unit 1], PC_m(n) means the number of PDCCH candidates per AL n corresponding to all CC combinations schedulable by the m-cc DCI (the entire CC set to which it belongs). In the case of [reference unit 2], PC_m(n) means the number of PDCCH candidates per AL n for each scheduled CC combination schedulable by the m-cc DCI. In the case of [reference unit 3], PC_m(n) means the number of PDCCH candidates per AL n set for each CC schedulable by the m-cc DCI.

[0131] 3.1 Method 1: The number of PDCCH candidates per AL n for each CC for the m-cc DCI is set to be the same as the PC_m(n) (already set for the s-cc DCI) of that CC. In this case, in any of the cases of reference units 1 / 2 / 3, the number of PDCCH candidates per AL n per CC has the PC_m(n) value set for that CC.

[0132] 3.1-1 Method 1-1: The number of PDCCH candidates per AL n for each CC is set to be the same as the PC_m(n). In this case, in any of the cases of reference units 1 / 2 / 3, the number of PDCCH candidates per AL n per CC has the PC_m(n) value set.

[0133] 3.2 Method 2: For each CC's AL n for the m-cc DCI, the number of PDCCH candidates is set to be the same as PC_m(n) / M of that CC (which has already been set for the s-cc DCI). At this time, M means the total number of CCs schedulable by the m-cc DCI when [reference unit 1] is applied, the number of CCs (actually) scheduled simultaneously by the m-cc DCI when [reference unit 2] is applied, and means "1" when [reference unit 3] is applied.

[0134] 3.2-1 Method 2-1: For each CC's AL n, the number of PDCCH candidates is set to be the same as PC_m(n) / M based on a specific M value. At this time, M means the total number of CCs schedulable by the m-cc DCI when [reference unit 1] is applied, the number of CCs (actually) scheduled simultaneously by the m-cc DCI when [reference unit 2] is applied, and means "1" when [reference unit 3] is applied.

[0135] 3.3 Method 3: For each CC, the number of PDCCH candidates for each AL n for the m-cc DCI is set differently for each CC at a specific ratio of PC_m(n) (already set for the s-cc DCI for that CC). That is, for cell #k, the number of PDCCH candidates for each AL n is set to α(k)*PC_m(n), and for cell #j, the number of PDCCH candidates for each AL n is set to α(j)*PC_m(n). For example, if there are three scheduled cells, the number of PDCCH candidates for each AL n for cell #1 / 2 / 3 respectively is set to α(1)*PC_m(n), α(2)*PC_m(n), α(3)*PC_m(n). At this time, the relationship α(1)+α(2)+α(3)=1 holds. The α value for each CC is predefined or set (e.g., upper layer signaling) according to the number of CCs. In applying this method, the number of α that needs to be set / decided is, in the case of [reference unit 1], the total number of CCs schedulable by the m-cc DCI, in the case of [reference unit 2], the number of CCs actually (simultaneously) schedulable by the m-cc DCI, and in the case of [reference unit 3], 1.

[0136] 3.3-1 Method 3-1: For each CC, the number of PDCCH candidates for each AL n is set to be different for each CC at a specific ratio of PC_m(n). That is, for cell #k, the number of PDCCH candidates for each AL n is set to α(k)*PC_m(n), and for cell #j, the number of PDCCH candidates for each AL n is set to α(j)*PC_m(n). For example, if there are three scheduled cells, the number of PDCCH candidates for each AL n for cell #1 / 2 / 3 respectively is set to α(1)*PC_m(n), α(2)*PC_m(n), α(3)*PC_m(n). At this time, the relationship α(1)+α(2)+α(3)=1 holds. The α for each CC is predefined or set (e.g., upper layer signaling) according to the number of CCs. In applying this method, the number of α that needs to be set / decided is, in the case of [reference unit 1], the total number of CCs schedulable by the m-cc DCI, in the case of [reference unit 2], the number of CCs actually scheduled simultaneously by the m-cc DCI, and in the case of [reference unit 3], 1.

[0137] 3.4 Method 4: The number of PDCCH candidates for a specific representative CC among the scheduled CCs scheduled by the m-cc DCI is set to PC_m(n). In this case, for the scheduled CCs other than the representative CC, another number of PDCCH candidates may not be determined. Alternatively, as a more generalized method, the number of PDCCH candidates is set to a predetermined level (=T) or less in other CCs (the number of other CCs varies according to the reference method) other than the representative CC, and (when the sum of the values set in this way for the entire CC is X), the number of PDCCH candidates for the representative CC is set to PC_m(n)-X. In this method, the representative CC is one of {{cell#m},M} set as the target of the m-cc DCI scheduling and is determined using the ref-cc setting method described in [1] above. Also, the above-mentioned predetermined level (T) is determined so as to avoid SS (set) overbooking exceeding the BD budget and the resulting SS (set) dropping in the CCs other than the representative CC, and T is defined or set in advance (for example, upper layer signaling).

[0138] 3.5 Method 5: For each CC's AL n for the m-cc DCI, the number of PDCCH candidates is set for each CC at a specific ratio of PC_m(n) (already set for the s-cc DCI for that CC) (differently). At this time, a weighting value is set according to the number (or ratio) of co-scheduled cell combinations (that can be scheduled simultaneously with the m-cc DCI) for each scheduled cell that includes that cell. That is, for cell#k, the number of PDCCH candidates for each AL n is set to C(k)+α(k)*PC_m(n), and for cell#j, the number of PDCCH candidates for each AL n is set to C(j)+α(j)*PC_m(n). Alternatively, for cell#k, the number of PDCCH candidates for each AL n is set to [C(k)+α(k)]*PC_m(n), and for cell#j, the number of PDCCH candidates for each AL n is set to [C(j)+α(j)]*PC_m(n). For example, when there are three scheduled cells, the number of DCCH candidates for each AL n for cell#1 / 2 / 3 is set to [C(1)+α(1)]*PC_m(n), [C(2)+α(2)]*PC_m(n), [C(3)+α(3)]*PC_m(n), respectively, and C(1):C(2):C(3)=1:2:3 (or 3:2:1). Also, weighting values that simultaneously satisfy C(1):C(2):C(3)=1:2:3, α(1)+α(2)+α(3)=1, and / or C(1)+C(2)+C(3)=1 may be set. Alternatively, the weighting value for each cell (i.e., the C(k) value for cell#k) may be determined according to the number of cells that make up the co-scheduled cell combination set that includes that cell. For example, when the co-scheduled cell combination for cell#k is {cell#1,cell#2}, the weighting value of cell#1 may be C(1), or it may be determined as the value obtained by dividing C(1) by the number of cells that make up the co-scheduled cell combination that includes that cell (in the case of the above example, it corresponds to 0.5*C(1)). Furthermore, the weighting value for each CC (i.e., the C(k) value for cell#k) is predefined according to the number of CCs (or according to the number of co-scheduled cell combinations) or set by RRC (e.g., upper layer signaling), etc.In applying this method, the number of weighted values for each cell that requires setting / determination is, in the case of [reference unit 1], the total number of cells schedulable by m-cc DCI, in the case of [reference unit 2], the number of cells actually (simultaneously) scheduled by m-cc DCI, and in the case of [reference unit 3], 1.

[0139] 3.6 Method 6: For each CC's AL n of the m-cc DCI, the number of PDCCH candidates is set for each CC (differently) at a specific ratio of PC_m(n) of that CC (which has already been set for the s-cc DCI). At this time, a weighting value is set according to the number (or ratio) of co-scheduled cell combinations that can be scheduled simultaneously by the m-cc DCI for each scheduled cell that contains that cell. That is, for cell #k, the number of PDCCH candidates for each AL n is set to C(k)*PC_m(n), and for cell #j, the number of PDCCH candidates for each AL n is set to C(j)*PC_m(n), where C(k) and C(j) respectively correspond to the number (or ratio) of co-scheduled cell combinations that contain cell #k and cell #j. For example, for three scheduled cells that can be scheduled simultaneously by the m-cc DCI, if one co-scheduled cell combination of {cell#1}, {cell#1,cell#2}, {cell#1,cell#2,cell#3} is set to be schedulable by that m-cc DCI through RRC configuration etc., then for cell#1 / 2 / 3 respectively, it is set to C(1)*PC_m(n), C(2)*PC_m(n), C(1)*PC_m(n), and at this time, C(1):C(2):C(3)=1:2:3 (or 3:2:1). Also, a weighting value that simultaneously satisfies C(1):C(2):C(3)=1:2:3 and C(1)+C(2)+C(3)=1 may be set. As an example, it is set to C(1)=1 / 6, C(2)=2 / 6, C(3)=3 / 6. The weighting value for each CC (i.e., the C(k) value for cell #k) is predefined or set by RRC (e.g., upper layer signaling) etc. according to the number of CCs (or according to the number of co-scheduled cell combinations). In applying this method, the number of constant C(k) values of the weighting values that need to be set / decided is the total number of CCs that can be scheduled by the m-cc DCI in the case of [reference unit 1], the number of CCs that are actually (simultaneously) scheduled by the m-cc DCI in the case of [reference unit 2], and 1 in the case of [reference unit 3].

[0140] 3.7 Method 7: For each CC's AL n for the m-cc DCI, the number of PDCCH candidates is set for each CC at a specific ratio of PC_m(n) (already set for the s-cc DCI) for that CC (differently). Here, in the case of the specific ratio, it becomes the weighting value multiplied by PC_m(n). For example, the value obtained by multiplying the weighting value by PC_m(n) is set as the number of PDCCH candidates for each CC's AL n for the m-cc DCI. As an example, when a cell combination simultaneously scheduled by one m-cc DCI is defined as a co-scheduled cell combination (different from each other), the specific ratio or weighting value is determined based on the comparison (e.g., B / A) between the total number of co-scheduled cell combinations (e.g., A) and the number of co-scheduled cell combinations to which that CC belongs (e.g., B). Alternatively, for each co-scheduled cell combination, when that CC belongs to that cell combination, the weighting value is determined to be 1, and otherwise, the weighting value is determined to be 0. As another example, when the number of cells belonging to one co-scheduled cell combination is defined as C, for each co-scheduled cell combination to which that CC belongs, 1 / C is calculated, and based on the sum of all values, the specific ratio or weighting value is determined. Alternatively, for each co-scheduled cell combination, when that CC belongs to that co-scheduled cell combination (based on the C value of that cell set), the weighting value is determined to be 1 / C, and otherwise, the weighting value is determined to be 0.

[0141] The methods described above are each applied independently or are applied by combining some principles of each method.

[0142] Furthermore, if some of the multiple CCs scheduled simultaneously by the m-cc DCI are not applicable, when applying the method described above, PC_m(n) is allocated for each available CC excluding the inapplicable CCs. Here, the inapplicable CC means a CC that is scheduled / indicated by the m-cc DCI but for which a PDSCH / PUSCH that cannot actually be transmitted is configured. The reasons for not being able to actually transmit include cases where the scheduled PDSCH / PUSCH does not conform to the (semi-static) DL / UL settings configured for the cell (e.g., overlapping in time with the semi-static DL / UL symbols) and thus cannot be actually transmitted, and / or cases where the scheduled PDSCH / PUSCH overlaps in time with other signals / channels such as SSB and cannot be actually transmitted.

[0143] Regarding the method described above, the calculation of the number of PDCCH candidates for each proposed CC can be understood as a method of counting the blind detections (BD) required when monitoring the m-cc DCI (i.e., a method of determining how to count the BD for the m-cc DCI as the BD for the DCI related to which CC). For example, "3.4 Method 4: Set the number of PDCCH candidates for a specific representative CC among the scheduled CCs scheduled by the m-cc DCI to PC_m(n)" can be understood / interpreted as a method of counting the BD attempts (up to a maximum of PC_m(n) times) for monitoring the m-cc DCI (and the corresponding PDCCH) as the BD for the DCI related to the specific representative CC.

[0144] [4] Setting method of BD / CCE restriction and determination method of overbooking for m-cc DCI

[0145] In the NR system, for each scheduled cell, the terminal pre - defines BD / CCE limits for specific time intervals (slot / span / slot - group), and checks whether the number of PDCCH candidates for each CC within this interval exceeds the BD limit, or whether the number of CCEs associated with these PDCCH candidates exceeds the CCE limit. That is to say, in other words, when the terminal assigns PDCCH MOs for each SS set that can be monitored (by each time interval), it should not exceed the BD / CCE limits. More specifically, for all SS sets (CSS and USS) of SCell and CSS of PCell, the SS set is configured so as not to exceed the defined BD / CCE limits. For USS of PCell, an SS set that overbooks the BD / CCE limit is configured. In this case, a dropping rule is applied. That is, among the configured SS sets, only the SS sets that do not exceed the BD / CCE limit are set / monitored.

[0146] The following reference items are the per - cell BD / CCE limits and overbooking / dropping methods described in "10.1 UE procedure for determining physical downlink control channel assignment" of 3GPP TS 38.213, which are defined in NR. The operations described in the reference items can be included as part of the invention's configuration.

[0147] [Reference Items]

[0148] JPEG2025516187000013.jpg170153

[0149] JPEG2025516187000014.jpg218153

[0150] JPEG2025516187000015.jpg220150

[0151] JPEG2025516187000016.jpg217151

[0152] JPEG2025516187000017.jpg215151

[0153] JPEG2025516187000018.jpg72149

[0154] [End of reference items]

[0155] The cell-specific (non-CA and CA) BD limits described in "10.1 UE procedure for determining physical downlink control channel assignment" of the above-mentioned 3GPP TS 38.213 are denoted as M_max and M_total, and the corresponding CCE limits are denoted as C_max and C_total. According to 3GPP TS 38.213, in the CA situation, the BD / CCE limits for each cell are checked using min(M_max, M_total) and min(C_max, C_total). That is, in the CA situation where M cells are configured, each terminal checks whether the number of PDCCH candidates set for each CC and the number of CCEs associated therewith during a specific time interval exceed min(M_max, M_total) and min(C_max, C_total), respectively.

[0156] In the case of scheduling using m-cc DCI, as described in [2] above, depending on how the [reference unit] to be set / applied is defined, the number of PDCCH candidates is set for a plurality of CC set units, or the number of PDCCH candidates per individual CC is set. However, even if PC_m(n) is set for each of the plurality of CCs according to [reference unit 1] or [reference unit 2], the number of PDCCH candidates per individual CC is determined as described in [3]. Therefore, the BD / CCE limits are set for each CC, and the overbooking check is also performed on a per-CC basis. The BD / CCE limits for each CC are set using any one of the following methods.

[0157] 4.1 Method 1: For each scheduled CC scheduled by m-cc DCI, similar to the conventional s-cc scheduling, M_total and C_total are determined using M_max and C_max set for each CC, and min(M_max, M_total) is set as the BD limit for that CC, and min(C_max, C_total) is set as the CCE limit. If the SCSs are different for each scheduled CC, the BD / CCE limits are determined for each SCS.

[0158] 4.2 Method 2: For each scheduled CC scheduled by m-cc DCI, the BD / CCE limit for each CC is set to a value obtained by multiplying the conventional BD / CCE limit M_max or C_max for each CC by N / (N + 1). For example, the BD limit is set to M_max*N / (N + 1), and the CCE limit is set to C_max*N / (N + 1). If [Reference Interval 1] is applied to the PC_m(n) setting, N means the total number of CCs schedulable by m-cc DCI, and if [Reference Interval 2] is applied, N means the number of CCs actually (simultaneously) scheduled by m-cc DCI.

[0159] 4.3. Method 3: The BD / CCE limits are set to be different for each CC.

[0160] - Method 3-1: The BD / CCE limits are set to be different for each CC scheduled by m-cc DCI. The BD / CCE limits are determined using β(k)*min(M_max, M_total) and / or β(k)*min(C_max, C_total) for the k-th CC. For example, when considering two CCs scheduled by m-cc DCI, β(1)*min(M_max, M_total) and β(1)*min(C_max, C_total) are applied as the BD / CCE limits for CC#1, and β(2)*min(M_max, M_total) and β(2)*min(C_max, C_total) are applied as the BD / CCE limits for CC#2.

[0161] - Method 3-2: The BD / CCE limits are set to be different for each CC scheduled by the m-cc DCI. For the k-th CC, the BD / CCE limits are determined using β(k)*M_max instead of M_max and / or β(k)*C_max instead of C_max. In this case, the BD limit is determined by the minimum value of M_max and M_total changed by scaling β(k) (the same applies to the CCE limit).

[0162] - Method 3-3: The BD / CCE limits are set to be different for each CC scheduled by the m-cc DCI. For the k-th CC, the BD / CCE limits are determined using β(k)*M_total and / or β(k)*C_total. In this case, the BD limit is determined by the smaller value between M_total changed by scaling β(k) and M_max set regardless of β(k) (the same applies to the CCE limit).

[0163] The β(k) described in Methods 3-1 to 3-3 of [4] is predefined or set (e.g., upper layer signaling) according to (the number of CCs scheduled simultaneously (or schedulable simultaneously)). Also, β(k) is defined / set for each CC#k so that the sum of the BD / CCE limits for all CCs before / after being scaled using β(k) (i.e., the total BD limit (or CCE limit) for all scheduled CCs) is maintained constant. Also, in the above method, for the sake of convenience of explanation, β applied to BD and CCE is expressed in the same way, but they may be set to different values such as β_BD or β_CCE.

[0164] The methods 3-1 to 3-3 of [4] have the following requirements. Each scheduled CC scheduled simultaneously with the m-cc DCI is scheduled with the m-cc DCI or the s-cc DCI as described in [1] above and is set to the ref-cell according to the operation method of the m-cc DCI. Also, as in [3] above, different PDCCH candidate numbers may be determined for each scheduled CC. Thereby, when the m-cc DCI is introduced / set, when the BD / CCE restrictions are set to be different for each CC in a part of the setting methods described in [1], [2], and [3], Method 3 in 4.3 is useful.

[0165] The BD / CCE restriction set as one of the methods of [4] above is used to determine the presence or absence of overbooking for each CC (and also for each unit time interval).

[0166] On the other hand, when the number of PDCCH candidates for each AL n for the m-cc DCI is set in units of a plurality of CC sets according to [Reference Interval 1] or [Reference Interval 2] as in [2] above, the BD / CCE restriction is also set in the same units of a plurality of CC sets. Also, using the PC_m(n) and the BD / CCE restriction set in units of a plurality of CC sets, the presence or absence of overbooking is determined.

[0167] Furthermore, if some of the multiple CCs scheduled simultaneously by the m-cc DCI are unavailable, only the PDSCH / PUSCH scheduled for those some CCs is dropped, and the scheduling configured for the other CCs is carried out validly. At this time, the unavailable CC means the CC for which PDSCH / PUSCH is scheduled / indicated by the m-cc DCI but cannot actually be transmitted. The reasons why PDSCH / PUSCH cannot be transmitted include the case where the scheduled PDSCH / PUSCH does not conform to the (semi-static) DL / UL configuration set for the cell (for example, overlapping in time with the semi-static DL / UL symbols) and thus cannot actually be transmitted, and / or the case where the scheduled PDSCH / PUSCH overlaps in time with other signals / channels such as SSB and thus cannot actually be transmitted.

[0168] If, among the operation methods described in [1], when a ref-cc is configured as in 1.2 Option 2 and 1.2-a Option 2a and the ref-cc is unavailable, the terminal ignores or drops the m-cc DCI. Similarly, if the scheduling cell is unavailable or any one of the PCell, PSCell, and PUCCH SCell is unavailable, the terminal ignores or drops the m-cc DCI.

[0169] Furthermore, in order to reduce the burden of blind detection of the terminal for the m-cc DCI, constraints are set for the PDCCH candidate monitoring corresponding to the m-cc DCI. Any one of the following methods (or a combination of two or more) is set.

[0170] - When both s-cc DCI and m-cc DCI can schedule DL or UL transmissions in a specific scheduled cell, it is set such that monitoring for the terminal's s-cc DCI and monitoring for m-cc DCI are not performed simultaneously within a specific time interval (e.g., a slot). For example, a terminal with m-cc DCI configured operates expecting that the PDCCH MO for m-cc DCI is not configured in the slot where the MO for s-cc DCI is configured.

[0171] - When both s-cc DCI and m-cc DCI can schedule DL or UL transmissions in a specific scheduled cell, if overbooking occurs (the CCE occupancy resource per DCI is larger), the SS set for m-cc DCI is preferentially dropped. Alternatively, conversely, when both s-cc DCI and m-cc DCI can schedule DL or UL transmissions, if overbooking occurs (the DCI overhead per CC is larger), the SS set for s-cc DCI is preferentially dropped.

[0172] - When both s-cc DCI and m-cc DCI can schedule DL or UL transmissions in a specific scheduled cell (or when simultaneous monitoring is required), depending on the SS set configuration method, the terminal drops one (or both) of s-cc DCI and m-cc DCI as follows (or is predefined or configured to operate as follows).

[0173] · Alt-1: It is possible to set both the SS set for s-cc DCI and the SS set for m-cc DCI. However, in the same MO (or the same slot), it is necessary to set a configuration that makes it impossible to simultaneously monitor these two DCIs. In other words, regardless of whether there is overbooking (i.e., exceeding the maximum BD budget) in the same MO / slot, it is necessary to set a configuration that makes it impossible to simultaneously monitor the two DCIs. Here, when the SS set for s-cc DCI and the SS set for m-cc DCI are set in the same MO (or the same slot), as a handling method for this, any one of the following methods is set.

[0174] ◆ The terminal is specified to monitor only the SS set configured for a specific one of the s-cc DCI and the m-cc DCI, and operates to omit (drop) the monitoring of the SS set configured for the other one of the DCIs. In this case, the specific DCI is specified for the s-cc DCI or the m-cc DCI. Alternatively, RRC sets which DCI's configured SS set only to monitor among the two DCIs.

[0175] ◆ When both s-cc DCI and m-cc DCI can be simultaneously configured for each SS set, the SS sets are dropped in descending order of index (i.e., both the s-cc and m-cc of the SS set are dropped). Alternatively, they are dropped in the order of s-cc of the SS set with the highest index -> m-cc of the SS set with the highest index -> s-cc of the SS set with the next highest index -> m-cc of the SS set with the next highest index.

[0176] ◆ If only one of s-cc DCI or m-cc DCI is set for each SS set, the SS sets are dropped in descending order of index (regardless of the distinction between s-cc DCI and m-cc DCI). Alternatively, it is dropped from the highest index among the SS sets for s-cc (or m-cc), and then the SS set with the highest index among the SS sets for m-cc (or s-cc) is dropped.

[0177] ◆ When only one of s-cc DCI or m-cc DCI is set for each SS set (or regardless of this), if the MOs for s-cc and m-cc overlap, the s-cc (or m-cc) DCI is preferentially dropped.

[0178] · Alt-2: When SS sets for s-cc DCI and SS sets for m-cc DCI are both set (either to the same or different SS sets) and simultaneous monitoring is also possible in the same MO / slot, if it exceeds the maximum BD in the same MO / slot, dropping of specific SS sets is necessary. As a method for this, any one of the following methods is set.

[0179] ◆ It is defined that the terminal preferentially drops the SS set set for a specific one of the s-cc DCI and m-cc DCI. In this case, the specific DCI is defined for s-cc DCI or for m-cc DCI. Alternatively, the RRC sets which DCI's set SS set to preferentially drop among the two DCIs.

[0180] ◆ When s-cc DCI and m-cc DCI can be set simultaneously for each SS set, the SS sets are dropped in the order of the highest index (i.e., both the s-cc and m-cc of the SS set are dropped). Alternatively, they are dropped in the order of the s-cc of the SS set with the highest index -> the m-cc of the SS set with the highest index -> the s-cc of the SS set with the next highest index -> the m-cc of the SS set with the next highest index.

[0181] ◆ When only one of s-cc DCI or m-cc DCI is set for each SS set, the SS sets are dropped in the order of the highest index (regardless of whether it is s-cc DCI or m-cc DCI). It is dropped from the highest index among the SS sets for s-cc (or m-cc), and then the SS set with the highest index among the SS sets for m-cc (or s-cc) is dropped.

[0182] ◆ When only one of s-cc DCI or m-cc DCI is set for each SS set (or regardless of this), if the MOs for s-cc and m-cc overlap, the s-cc (or m-cc) DCI is preferentially dropped.

[0183] [5] Determination method of co-scheduled cells for multi-cell scheduling by SS linking

[0184] Regarding cross-carrier scheduling in Rel-16 / 17, the SS set configured for the scheduled cell is SS-linked to the scheduling cell. That is, the same SS set index (or ID) as the SS set of the scheduling cell is configured for the SS set of the scheduled cell. In this case, only the number of PDCCH candidates (PCs) for each AL and AL n is configured separately for the scheduled cell. In other words, when an SS set having the same SS set index or ID (e.g., K) as a specific SS set configured on the scheduled cell is configured on the scheduling cell, it means that the SS set #K is SS-linked (between the scheduled cell and the scheduling cell). In this case, the PDCCH carrying DCI for the scheduled cell by the SS set #K on the scheduling cell is scheduled / transmitted. The number of PDCCH candidates (PCs) for each AL and AL n for this purpose is determined by the value configured for the SS set #K on the scheduled cell.

[0185] Multiple scheduled cells are scheduled simultaneously by the m-cc DCI, and at this time, the SS-linking between the scheduling cell for the scheduling by the m-cc DCI and each scheduled cell is (extended) applied. For multi-cell scheduling by the M-cc DCI, when an SS is configured for the scheduling cell and an SS having an SS-linking relationship with the scheduling cell is configured for some (or all) of the co-scheduled cells, a method for determining the co-scheduled cells that can be multi-cell scheduled by the m-cc DCI is proposed. Any one (or a combination of two or more) of the methods proposed below is applied.

[0186] The methods described below are applied (independently) to each SS set index (or, ID) set in the scheduling cell. (For convenience, the SS set (index / ID) is referred to as SS (index / ID).) That is, for each proposed method, whether the co-scheduled cell combinations to be multi-cell scheduled by a specific SS (e.g., SS#k) are the same as or different from those to be multi-cell scheduled by a specific SS (e.g., SS#n) different from the multi-cell scheduling by the specific SS (e.g., SS#k).

[0187] 5.1 Method 1: The m-cc DCI schedules co-scheduled cell combinations composed only of SS-linked scheduled cells (with the scheduling cell). Specifically, for a specific SS (e.g., SS#k) on the scheduling cell, the scheduled cell with SS#k having the same index / ID is determined. In this case, the m-cc DCI transmitted by SS#k on the scheduling cell schedules the co-scheduled cell combination composed only of that cell. The PDCCH candidate set for this is set / configured for the SS#k. For SSs with different indexes (or, IDs) set in the scheduling cell, the co-scheduled cell combination composed of cells with a specific SS (e.g., SS#k) set (in an SS link relationship) is multi-cell scheduled by the SS (e.g., SS#k), and the co-scheduled cell combination composed of cells with another SS (e.g., SS#n) set (in an SS link relationship) is multi-cell scheduled by the SS (in this case, SS#n).

[0188] · For example, when the schedulable cell set for multi-cell scheduling by m-cc DCI (the set of all cells schedulable by m-cc DCI) is {cell#1, cell#2, cell#3, cell#4}, if SS#k connected to the scheduling cell is set only for {cell#1, cell#2, cell#3}, m-cc DCI schedules the co-scheduled cell combination consisting of only {cell#1, cell#2, cell#3} by SS#k on the scheduling cell. In order for m-cc DCI to schedule {cell#1, cell#2, cell#3} simultaneously, it is necessary to set an SS having the same index as the SS of the scheduling cell for all of cell#1, cell#2, and cell#3 in the SS connection relationship.

[0189] 5.2 Method 2: The m-cc DCI can simultaneously schedule a co-scheduled cell combination that includes both the scheduling cell and the scheduled cells linked to the SS. Specifically, a scheduled cell with the same index / ID as a specific SS (e.g., SS#k) on the scheduling cell is determined. In this case, the m-cc DCI transmitted by SS#k on the scheduling cell schedules one or more co-scheduled cell combinations configured to include the cell. A PDCCH candidate set for this purpose is set / configured for the SS#k. That is, the cell combination includes both the scheduling cell and the scheduled cells linked to the SS, and also includes cells for which the SS link relationship does not hold. At this time, for SSs with different indexes (or, IDs) set on the scheduling cell, the co-scheduled cell combination consisting of cells with a specific SS (e.g., SS#k) set (in the SS link relationship) is multi-cell scheduled by the SS (e.g., SS#k), and the co-scheduled cell combination consisting of cells with another SS (e.g., SS#n) set (in the SS link relationship) is multi-cell scheduled by the SS (in this case, SS#n).

[0190] · For example, when the schedulable cell combinations for multi-cell scheduling by m-cc DCI are {cell#1, cell#2, cell#3, cell#4}, and if an SS #k connected to the scheduling cell is set only for {cell#1, cell#2, cell#3}, the m-cc DCI schedules one or more co-scheduled cell combinations (e.g., {cell#1, cell#2, cell#3}, {cell#1, cell#2, cell#3, cell#4}) configured to include all of {cell#1, cell#2, cell#3} by the SS#k on the scheduling cell. That is, the co-scheduled cells consist of the union of all cells for which the connected SS is set and / or, in addition to such cells, cells for which the same SS is not set in the SS connection relationship.

[0191] 5.3 Method 3: The m-cc DCI can simultaneously schedule a co-scheduled cell combination that includes one of the scheduled cells linked to the scheduling cell and the SS. Specifically, for a specific SS (e.g., SS#k) on the scheduling cell, a scheduled cell with SS#k having the same index / ID is determined. In this case, the m-cc DCI transmitted by SS#k on the scheduling cell schedules one or more co-scheduled cell combinations configured to include at least one cell of the said cell. A PDCCH candidate set for this purpose is set / configured for the said SS#k. That is, the said cell combination includes at least one or more scheduled cells linked to the scheduling cell SS, and cells where the said SS link relationship does not hold are also included in the said cell combination. At this time, for SSs with different indexes (or, IDs) set on the scheduling cell, a co-scheduled cell combination consisting of cells where a specific SS (e.g., SS#k) is set (in the SS link relationship) is multi-cell scheduled by the said SS (e.g., SS#k), and a co-scheduled cell combination consisting of cells where other SSs (e.g., SS#n) are set (in the SS link relationship) is multi-cell scheduled by the said SS (in this case, SS#n).

[0192] · For example, when the schedulable cell combination for multi-cell scheduling by m-cc DCI is {cell#1, cell#2, cell#3, cell#4}, if only SS #k linked to the scheduling cell is set for {cell#1, cell#2, cell#3}, the m-cc DCI by SS#k on the scheduling cell schedules one or more co-scheduled cell combinations (e.g., {cell#1, #2}, {cell#1, #4}, {cell#1, #3, #4}, etc.) configured to include at least one cell of {cell#1, cell#2, cell#3}. That is, at least one of the co-scheduled cells has an SS link relationship set with the scheduling cell.

[0193] 5.4 Method 4: The m-cc DCI can schedule a co-scheduled cell combination consisting of all or part of the scheduled cells linked to the scheduling cell and the SS. Specifically, a scheduled cell with the same index / ID as a specific SS (e.g., SS#k) on the scheduling cell is determined. In this case, the m-cc DCI transmitted by SS#k on the scheduling cell schedules one or more co-scheduled cell combinations consisting of all or part of the cells of the cell. A PDCCH candidate set for this is set / configured for the SS#k. That is, the co-scheduled cell combination or the cells of a part of the combination are set / configured with the scheduled cells linked to the scheduling cell and the SS, and the cells for which the SS link relationship does not hold are not included in the cell combination.

[0194] · For example, when the schedulable cell combination for multi-cell scheduling by m-cc DCI is {cell#1, cell#2, cell#3, cell#4}, if an SS#k linked to the scheduling cell is set only for {cell#1, cell#2, cell#3}, the m-cc DCI by SS#k on the scheduling cell schedules one or more co-scheduled cell combinations consisting of all or part of {cell#1, cell#2, cell#3} (e.g., {cell#1}, {cell#2}, {cell#3}, {cell#1, #2}, {cell#1, #3}, {cell#2, #3}, {cell#1, #2, #3}). That is, it is similar to [5.1 Method 1] in that SS connection needs to be set for all co-scheduled cells, but (in [5.1 Method 1], all scheduled cells linked by SS are scheduled simultaneously), in this method, all (or part) of the cells linked by SS are scheduled simultaneously.

[0195] 5.5 Method 5: Multi-cell scheduling by m-cc DCI is instructed / set to be possible only when SSs that are SS-linked to the scheduling cell are set in all cells within a schedulable cell combination. Specifically, for a specific SS (e.g., SS#k) on the scheduling cell, a scheduled cell with SS#k having the same index / ID is determined. In this case, the m-cc DCI transmitted by SS#k on the scheduling cell schedules any (all) co-scheduled cell combinations only when the set of cells is the same as the schedulable cell combination. A PDCCH candidate set for this is set / configured for the SS#k. That is, all cells belonging to the co-scheduled cell combination are set / configured with scheduled cells that are SS-linked to the scheduling cell, and all cells of the schedulable cell combination have an SS-linkage relationship set with the scheduling cell.

[0196] · For example, when the schedulable cell combination for multi-cell scheduling by m-cc DCI is {cell#1, cell#2, cell#3, cell#4}, if an SS#k that is SS-linked to the scheduling cell is set only in {cell#1, cell#2, cell#3} (i.e., an SS-linkage relationship is not set for some cells), the transmission of the m-cc DCI and the resulting multi-cell scheduling are not allowed by SS#k on the scheduling cell. That is, in order to schedule the schedulable cell combination by m-cc DCI, it is necessary to set SSs that are SS-linked to the scheduling cell in all of {cell#1, cell#2, cell#3, cell#4}.

[0197] Furthermore, for the above-described method, the method for setting the number of PDCCH candidates for each AL (set for m-cc DCI) for the m-cc DCI described in [2] and / or [3] and / or [4], the method for setting / applying the number of PDCCH candidates for each AL (set / applied to each (scheduled) cell), the BD counting method when monitoring m-cc DCI, the BD counting method set / applied to each (scheduled) cell, the BD / CCE limit (or BD / CCE budget) for m-cc DCI (set for m-cc DCI), the BD / CCE limit (or BD / CCE budget) set / applied to each (scheduled) cell, etc., for the above-described (scheduled) cell (or (scheduled) cell set), it is applied only to the (scheduled) cell in which the scheduling cell and the SS connection relationship are established. In other words, the (scheduled) cell in which the scheduling cell and the SS connection relationship are not established is excluded when applying the above-described proposed method. For example, in the above-described proposed method, in the case of a specific representative CC or ref-CC (or ref-cell), it is determined or set in a specific one of the (scheduled) cells in which the (scheduling cell) and the SS connection relationship are established.

[0198] Furthermore, based on the number of PCs for each AL set for a specific ref-cell among the (scheduled) cells that are in an SS connection relationship with the scheduling cell, the number of PCs for each AL of the m-cc DCI is determined / set. At this time, as the determination / setting method, any one of the methods described in the above [2] and [3] is applied. The specific ref-cell is determined by the method described in the above [1]. Also, based on the determined / set number of PCs for each AL, in order to determine the target (scheduled) cell for counting the BD (blind detection) that monitors the m-cc DCI, the method described in the above [3] (or [4]) is applied. Also in this case, when applying the above method, the above-mentioned (scheduled) cell (or, (scheduled) cell set) is limited to the (scheduled) cell in which the SS connection relationship with the scheduling cell is established. In other words, the (scheduled) cell in which the SS connection relationship with the scheduling cell is not established is excluded when applying the proposed method. For example, in the proposed method, in the case of a specific representative CC or ref-CC (or, ref-cell), it is determined or set for a specific one of the (scheduled) cells in which the SS connection relationship with the scheduling cell is established.

[0199] On the other hand, for the NR terminal, the searchSpaceType and the DCI format (for example, dci-Formats) are set by the RRC parameter SearchSpace. The above-described Method 1 to Method 5 of [5] are applied limitedly according to the DCI format of the SS set in the scheduling cell and / or the scheduled cell. For convenience of explanation, the DCI format (on SS setting) set for the m-cc DCI is referred to as format_X, and the DCI format (on SS setting) set for the legacy DCI is referred to as format_L (for example, formats0-0-And-1-0, formats0-1-And-1-1, etc.). The above-described method is applied only when the DCI format of the SS set in the scheduling and / or scheduled cell is format_X.

[0200] When format_X is set as the DCI format for SS#k set in the (1) scheduling cell, the SS connection relationship between the scheduling cell and the scheduled cell is established by the SS#k. That is, the SS set connection relationship between the scheduling cell and the scheduled cell for multi-cell scheduling is set / applied by the SS set with format_X set. At this time, the above-described method is applied to the connection setting of this SS set and / or the determination of the scheduled cell by this. For example, in method 1 / 4 / 5 of [5], format_X is set for SS#k set in the scheduling cell, and the (scheduled) cell in which the same SS#k is set (i.e., SS linking) is scheduled by m-cc DCI. In method 2 / 3 of [5], the cell combination (including the (scheduled) cell in which the same SS#k is set (i.e., SS linking)) with format_X set for SS#k set in the scheduling cell is scheduled by m-cc DCI.

[0201] · When format_X is set for SS#k set in the scheduling cell, format_X is set for SS#k on the (scheduled) cell scheduled by m-cc DCI.

[0202] · Alternatively, when format_X is set for SS#k set in the scheduling cell, format_L is set for SS#k on the (scheduled) cell scheduled by m-cc DCI. In this case, format_L is limited to the conventional DCI format 0_1 or DCI format 1_1.

[0203] · Alternatively, when format_X is set for SS#k set in the scheduling cell, no DCI format is set for SS#k on the (scheduled) cell scheduled by m-cc DCI.

[0204] (2) When both format_X and format_L are set as DCI formats for SS#k set in the scheduling cell, the SS connection relationship between the scheduling cell and the scheduled cell is established by the SS#k. At this time, the format_L may be limited to the conventional DCI format 0_1 or DCI format 1_1. That is, the SS set connection relationship between the scheduling cell and the scheduled cell for multi-cell scheduling is set / applied by the SS set in which format_X is set. At this time, the above-described method is applied to the setting of this SS set connection and / or the determination of the scheduled cell thereby. Alternatively, it is characteristically applied to Method 2 and Method 3 of [5], in which cells that are not set with the SS connection relationship with the scheduling cell are also included in the scheduled cell.

[0205] · At this time, when "format_X and format_L" are set as the DCI format for SS#k set in the scheduling cell, format_X is set for SS#k on the cell scheduled (scheduled) by the m-cc DCI, or "format_X and format_L" are set.

[0206] · Alternatively, when "format_X and format_L" are set for SS#k set in the scheduling cell, format_L is set for SS#k on the cell scheduled (scheduled) by the m-cc DCI. In this case, format_L is limited to the conventional DCI format 0_1 or DCI format 1_1.

[0207] · Alternatively, when "format_X and format_L" are set for SS#k set in the scheduling cell, no DCI format is set for SS#k on the cell scheduled (scheduled) by the m-cc DCI.

[0208] Furthermore, (it should be noted that) in scheduling by m-cc DCI, when format_X is defined as settable in a scheduled cell, the SS connection is possible only for the SS set (on the scheduled cell) with format_X set. If, in a scheduled cell, (format_X is defined as not settable and) only format_L is settable, the SS connection is possible only for the SS set (on the scheduled cell) with a specific format_L set. At this time, the specific format_L is DCI format 0_1 or DCI format 1_1 (and / or DCI format 0_2 or DCI format 1_2).

[0209] As an example, when format_X is defined as settable in a scheduled cell, the SS connection is established only between the SS set on the scheduled cell with format_X set and the SS set on the scheduled cell with format_X set (having the same index / ID as the said SS set). As another example, when only format_L is settable in a scheduled cell (where format_X is defined as settable in the scheduling cell), the SS connection is established only between the SS set on the scheduled cell with format_X set and the SS set on the scheduled cell with a specific format_L (e.g., DCI format 0_1 / 1_1 and / or DCI format 0_2 / 1_2) set (having the same index / ID as the said SS set).

[0210] On the other hand, the content of the present invention is not limited to and applied only to the transmission and reception of uplink and / or downlink signals. For example, the content of the present invention can also be used for direct communication between terminals. Also, the base station in the present invention is not only a Base Station but a concept including a relay node. For example, the operation of the base station in the present invention may be performed by a base station (Base Station) or by a relay node.

[0211] Since an example of the above-described proposed method is also included as one of the implementation methods of this specification, it is recognized as a kind of proposed method. The above-described proposed method may be implemented independently, or may be implemented in the form of a combination (or merger) of some proposed methods. Information regarding the applicability of the above-described proposed method (or information regarding the rules of the proposed method) can be notified by the base station to the terminal, or by the transmitting terminal to the receiving terminal, using a predetermined signal (for example, a physical layer signal or a higher layer signal).

[0212] Embodiment

[0213] FIG. 4 is a flowchart showing a signal transmission / reception method according to an embodiment of the present invention.

[0214] Referring to FIG. 4, the embodiment performed by the terminal (UE) includes a step of receiving a search space set configuration (S401) and a step of monitoring PDCCH candidates based on the search space set configuration (S403).

[0215] The monitoring of PDCCH candidates is performed based on any one or more of the operations described in Sections [1] to [5].

[0216] For example, referring to Section [2], the number of PDCCH candidates per CCE AL is set for the terminal by the configuration of the search space set (SS set). Since the search space set configuration is received by the terminal from the base station, information regarding the number of PDCCH candidates per CCE AL is received by the terminal through the search space set configuration.

[0217] The terminal monitors a plurality of PDCCH candidates to decode a PDCCH that transmits multi-cell DCI. The cell in which the PDCCH that transmits multi-cell DCI is received is defined as a scheduling cell. When the DCI format for multi-cell DCI is DCI format_X, the information regarding DCI format_X is included in the search space set configuration. The terminal monitors PDCCH candidates for the DCI format on the scheduling cell based on the search space set configuration. Here, the number of PDCCH candidates to be monitored is the number of PDCCH candidates per AL set based on the search space set configuration.

[0218] Multi-cell DCI schedules PDSCH or PUSCH on different scheduled cells from each other. Therefore, DCI format_X is a DCI format for scheduling PDSCH or PUSCH on different scheduled cells from each other. In the specification and claims, DCI and DCI format can be used interchangeably.

[0219] Referring to the reference unit in section [2], PC_m(n), which is the number of PDCCH candidates per AL, is set based on the combination of scheduled cells schedulable by multi-cell DCI.

[0220] Specifically, referring to reference unit 2 in section [2], PC_m(n) is set independently for each combination of all or part of the three scheduled cells, for example, for multi-cell DCI that can schedule up to three scheduled cells simultaneously. When multi-cell DCI can schedule up to n scheduled cells simultaneously, PC_m(n) is set independently for each combination of all or part of the n scheduled cells. The combination of all or part of the scheduled cells is composed of the cells actually scheduled simultaneously by a single DCI at a specific point in time among the n scheduled cells that can be scheduled simultaneously.

[0221] For example, when a multi-cell DCI that can be scheduled for up to n scheduled cells simultaneously is received in slot A and schedules PDSCH or PUSCH for three scheduled cells, PC-m(n) for the multi-cell DCI received in slot A is set to the value for the three scheduled cells.

[0222] When a multi-cell DCI that can be scheduled for up to n scheduled cells simultaneously is received in slot B and schedules PDSCH or PUSCH for four scheduled cells, PC_m(n) for the multi-cell DCI received in slot B is set to the value for the four scheduled cells.

[0223] When a multi-cell DCI that can be scheduled for up to n scheduled cells simultaneously is received in slot C and schedules PDSCH or PUSCH for three scheduled cells, but if any one of the three cells is different from the cell scheduled in slot A, PC_m(n) for the multi-cell DCI received in slot A and PC_m(n) for the multi-cell DCI received in slot C are set independently.

[0224] Referring to method 3 in section [2], PC_m(n) is set based on the number of PDCCH candidates per AL of a specific representative cell among the scheduled cells. According to reference unit 2 in section [2], since PC_m(n) is set based on the combination of cells that can be scheduled simultaneously by the m-cc DCI, the representative cell is one of all the cells that can be scheduled simultaneously by the DCI.

[0225] The representative cell is the cell with the lowest index, the cell with the highest index, the cell with the smallest number of PDCCH candidates for a specific AL, or the cell with the largest number of PDCCH candidates for a specific AL among all the cells that can be scheduled simultaneously. Although the combination of cells actually scheduled changes each time DCI is transmitted, since the range of all the cells that can be scheduled simultaneously by DCI is constant regardless of the transmission time of DCI (unless reset by RRC signaling etc.), the representative cell can be maintained even if the combination of cells actually scheduled simultaneously changes. Therefore, even when the representative cell is not included in the combination of cells actually scheduled at a specific time, PC_m(n) is set based on the number of PDCCH candidates per AL of the representative cell among the scheduled cells.

[0226] Alternatively, when the representative cell is a cell fixed by upper layer signaling, the combination of cells scheduled by multi-cell DCI always includes the representative cell.

[0227] According to Method 3 in Section [2], PC_m(n) is set to be the same as the number of PDCCH candidates per set level of CCEs set for the representative cell. Alternatively, PC_m(n) is set to be a part of the number of PDCCH candidates per set level of CCEs set for the representative cell. Therefore, the search space set configuration received by the terminal to monitor PDCCH candidates for the DCI format on the scheduling cell is the search space set configuration for the representative cell.

[0228] [5] According to the section, at least one of the search spaces of the scheduling cell and the search space of the scheduled cell is connected to each other. When the search space set for the scheduling cell and the search space set for the scheduled cell have the same search space ID (set by searchSpaceId), it is expressed that the search spaces are connected to each other (search spaces with the same searchSpaceId in scheduled cell and scheduling cell are linked to each other).

[0229] When the scheduled cell with the search space connected to the search space of the scheduling cell is defined as a specific cell, the specific cell includes a plurality of the scheduled cells. According to Method 3 of [5], among the cells schedulable by multi-cell DCI, the combination of the actually scheduled cells includes the specific cell and the cells that are not the specific cell. The cells that are not the specific cell mean the cells in which the search space connected to the search space of the scheduling cell is not set.

[0230] Also, referring to section [5], the DCI format is set for the scheduling cell by a search space set configuration (for example, SearchSpace parameter by RRC signaling). Table 11 shows the parameters used for the conventional DCI format setting.

[0231]

Table 11-1

Table 11-2

[0232] When the DCI format for multi-cell DCI is DCI format_X, the parameters for the setting of DCI format_X are expressed as dci-FormatX. The dci-FormatX parameters only include information regarding the DCI format for multi-cell DCI. X is expressed as a specific format number like the conventional formats, for example, 0_3, 1_3, 5_0, 5_1, 5_2, 6_0, 6_1, 6_2, etc.

[0233] Alternatively, the parameters for the setting of DCI format_X are expressed as dci-FormatX-AndFormatL. The dci-FormatX-AndFormatL parameters include both information regarding the DCI format for multi-cell DCI and information regarding the conventional DCI formats rather than the DCI format for multi-cell DCI. X is expressed as a specific format number like the conventional formats, for example, 0_3, 1_3, 5_0, 5_1, 5_2, 6_0, 6_1, 6_2, etc. L is one of the conventional DCI formats, such as 0_0, 0_1, 1_0, 1_1, etc.

[0234] The search space is set for the scheduling cell by the dci-FormatX parameters and / or the dci-FormatX-AndFormatL parameters. When the search space ID of the search space set for the scheduling cell is the same as the search space ID of the search space set for a specific scheduled cell, a connection relationship is established between the two search spaces.

[0235] In addition to the operations described in relation to FIG. 4, the operations described by FIGS. 1 to 3 and / or any one or more of the operations described in "DCI for scheduling PDSCHs or PUSCHs on multiple serving cells" and Sections [1] to [5] may be further combined and performed.

[0236] Example of a communication system to which the present invention is applied

[0237] Without being limited thereto, various descriptions, functions, procedures, proposals, methods, and / or flowcharts of the present invention disclosed in this specification can be applied to various fields that require wireless communication / connection between devices (e.g., 5G).

[0238] The following will be described more specifically with reference to the drawings. In the following figures / descriptions, the same reference numerals exemplify the same or corresponding hardware blocks, software blocks, or functional blocks unless otherwise specifically mentioned.

[0239] FIG. 5 illustrates a communication system 1 to which the present invention is applied.

[0240] Referring to FIG. 5, the communication system 1 applied to the present invention includes a wireless device, a base station, and a network. Here, the wireless device means a device that communicates using a wireless connection technology (for example, 5G NR, LTE), and is also referred to as a communication / wireless / 5G device. Without being limited thereto, the wireless devices include a robot 100a, vehicles 100b-1, 100b-2, an XR (Extended Reality) device 100c, a hand-held device 100d, a home appliance 100e, an IoT (Internet of Thing) device 100f, and an AI server / device 400. For example, the vehicles include vehicles equipped with a wireless communication function, autonomous driving vehicles, vehicles capable of vehicle-to-vehicle communication, etc. Here, the vehicles include UAVs (Unmanned Aerial Vehicles) (for example, drones). The XR device includes AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices, and is embodied in the form of an HMD (Head-Mounted Device), a HUD (Head-Up Display) provided in a vehicle, a TV, a smartphone, a computer, a wearable device, a home appliance, a digital signboard, a vehicle, a robot, etc. The hand-held devices include smartphones, smart pads, wearable devices (for example, smartwatches, smart glasses), computers (for example, notebook computers, etc.). The home appliances include TVs, refrigerators, washing machines, etc. The IoT devices include sensors, smart meters, etc. For example, the base station and the network are also embodied in the wireless device, and a specific wireless device 200a can also operate as a base station / network node for other wireless devices.

[0241] Wireless devices 100a to 100f are connected to network 300 via base station 200. AI (Artificial Intelligence) technology is applied to wireless devices 100a to 100f, and wireless devices 100a to 100f are connected to AI server 400 via network 300. Network 300 is configured using a 3G network, 4G (e.g., LTE) network, or 5G (e.g., NR) network, etc. Wireless devices 100a to 100f can communicate with each other via base station 200 / network 300, but can also communicate directly without going through the base station / network (e.g., sidelink communication). For example, vehicles 100b-1 and 100b-2 can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to everything) communication). Also, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0242] Wireless communications / connections 150a, 150b, and 150c are performed between wireless devices 100a to 100f / base station 200 and between base stations 200 / 200. Here, the wireless communications / connections include uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), and communication 150c between base stations (e.g., performed by various wireless connection technologies such as relay, IAB (Integrated Access Backhaul) (e.g., 5G NR)). Through wireless communications / connections 150a, 150b, and 150c, wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to / from each other. For example, wireless communications / connections 150a, 150b, and 150c can transmit / receive signals via various physical channels. For this purpose, based on various proposals of the present invention, any one of the setting process of various configuration information for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and resource allocation process is performed.

[0243] Example of a wireless device to which the present invention is applied

[0244] FIG. 6 illustrates a wireless device applicable to the present invention.

[0245] Referring to FIG. 6, the first wireless device 100 and the second wireless device 200 transmit and receive wireless signals by various wireless connection technologies (e.g., LTE, NR). Here, {the first wireless device 100, the second wireless device 200} corresponds to {the wireless devices 100a to 100f, the base station 200} and / or {the wireless devices 100a to 100f, the wireless devices 100a to 100f} in FIG. 5.

[0246] The first wireless device 100 includes one or more processors 102 and one or more memories 104, and further includes one or more transceivers 106 and / or one or more antennas 108. The processor 102 controls the memory 104 and / or the transceiver 106 and is configured to implement the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. For example, after the processor 102 processes the information in the memory 104 to generate a first piece of information / signal, the transceiver 106 transmits a wireless signal including the first piece of information / signal. Also, after the processor 102 receives a wireless signal including a second piece of information / signal by the transceiver 106, the information obtained from the signal processing of the second piece of information / signal is stored in the memory 104. The memory 104 is connected to the processor 102 and stores various information related to the operation of the processor 102. For example, the memory 104 stores software code including instructions for performing some or all of the processes controlled by the processor 102 or for performing the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. Here, the processor 102 and the memory 104 are part of a communication modem / circuit / chip designed to implement wireless communication technologies (e.g., LTE, NR). The transceiver 106 is connected to the processor 102 and transmits and / or receives wireless signals through one or more antennas 108. The transceiver 106 includes a transmitter and / or a receiver. The transceiver 106 can also be used interchangeably with an RF (Radio Frequency) unit. In the present invention, the wireless device can also mean a communication modem / circuit / chip.

[0247] The second wireless device 200 includes one or more processors 202 and one or more memories 204, and further includes one or more transceivers 206 and / or one or more antennas 208. The processor 202 controls the memory 204 and / or the transceiver 206, and is configured to implement the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. For example, after the processor 202 processes the information in the memory 204 to generate third information / signals, the transceiver 206 transmits a wireless signal including the third information / signals. Also, after the processor 202 receives a wireless signal including fourth information / signals by the transceiver 206, the information obtained from the signal processing of the fourth information / signals is stored in the memory 204. The memory 204 is connected to the processor 202 and stores various information related to the operation of the processor 202. For example, the memory 204 stores software code that performs some or all of the processes controlled by the processor 202, or includes instructions for performing the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. Here, the processor 202 and the memory 204 are part of a communication modem / circuit / chip designed to implement wireless communication technologies (e.g., LTE, NR). The transceiver 206 is connected to the processor 202 and transmits and / or receives wireless signals through one or more antennas 208. The transceiver 206 includes a transmitter and / or a receiver. The transceiver 206 can also be used interchangeably with an RF unit. In the present invention, the wireless device can also mean a communication modem / circuit / chip.

[0248] Hereinafter, the hardware elements of the wireless devices 100 and 200 will be described in more detail. Although not limited thereto, one or more protocol layers are implemented by one or more processors 102 and 202. For example, one or more processors 102 and 202 implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors 102 and 202 generate one or more PDUs (Protocol Data Units) and / or one or more SDUs (Service Data Units) according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. One or more processors 102 and 202 generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification. One or more processors 102 and 202 generate a signal (e.g., a baseband signal) including PDUs, SDUs, messages, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this specification, and provide it to one or more transceivers 106 and 206. One or more processors 102 and 202 receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206, and can obtain PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification.

[0249] One or more processors 102, 202 are also referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. One or more processors 102, 202 are implemented by hardware, firmware, software, or a combination thereof. As an example, one or more ASICs (Application Specific Integrated Circuits), one or more DSPs (Digital Signal Processors), one or more DSPDs (Digital Signal Processing Devices), one or more PLDs (Programmable Logic Devices), or one or more FPGAs (Field Programmable Gate Arrays) are included in one or more processors 102, 202. The descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification are implemented using firmware or software, and the firmware or software is implemented to include modules, procedures, functions, and the like. The firmware or software configured to perform the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification is included in one or more processors 102, 202, or stored in one or more memories 104, 204 and driven by one or more processors 102, 202. The descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this specification are implemented using firmware or software in the form of code, instructions, and / or sets of instructions.

[0250] One or more memories 104, 204 are connected to one or more processors 102, 202 and can store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories 104, 204 are composed of ROM, RAM, EPROM, flash memory, hard drive, register, cache memory, computer-readable storage medium, and / or combinations thereof. The one or more memories 104, 204 are located inside and / or outside the one or more processors 102, 202. Also, the one or more memories 104, 204 are connected to the one or more processors 102, 202 by various techniques such as wired or wireless connections.

[0251] One or more transceivers 106, 206 can transmit user data, control information, wireless signals / channels, etc. mentioned in this specification in the form of methods and / or flowcharts, etc. to one or more other devices. One or more transceivers 106, 206 can receive user data, control information, wireless signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts, etc. disclosed in this specification from one or more other devices. For example, one or more transceivers 106, 206 are connected to one or more processors 102, 202 and can transmit and receive wireless signals. For example, one or more processors 102, 202 can control one or more transceivers 106, 206 to transmit user data, control information or wireless signals to one or more other devices. Also, one or more processors 102, 202 can control one or more transceivers 106, 206 to receive user data, control information or wireless signals from one or more other devices. Also, one or more transceivers 106, 206 are connected to one or more antennas 108, 208, and one or more transceivers 106, 206 are configured to transmit and receive user data, control information, wireless signals / channels, etc. mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts, etc. disclosed in this specification by one or more antennas 108, 208. In this specification, one or more antennas are multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106, 206 convert the received wireless signals / channels, etc. from RF band signals to baseband signals (Convert) in order to process the received user data, control information, wireless signals / channels, etc. using one or more processors 102, 202. One or more transceivers 106, 206 convert the user data, control information, wireless signals / channels, etc. processed using one or more processors 102, 202 from baseband signals to RF band signals. For this purpose, one or more transceivers 106, 206 include (analog) oscillators and / or filters.

[0252] Example of utilization of a wireless device to which the present invention is applied

[0253] FIG. 7 shows another example of a wireless device to which the present invention is applied. The wireless device is embodied in various forms depending on the usage example / service (see FIG. 5).

[0254] Referring to FIG. 7, the wireless devices 100 and 200 correspond to the wireless devices 100 and 200 in FIG. 6 and are composed of various elements, components (parts), units / sections, and / or modules. For example, the wireless devices 100 and 200 include a communication unit 110, a control unit 120, a memory unit 130, and additional elements 140. The communication unit includes a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 includes one or more processors 102 and 202 and / or one or more memories 104 and 204 in FIG. 6. For example, the transceiver 114 includes one or more transceivers 106 and 206 and / or one or more antennas 108 and 208 in FIG. 6. The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional elements 140 and controls various operations of the wireless device. For example, the control unit 120 controls the electrical / mechanical operations of the wireless device based on programs / codes / instructions / information stored in the memory unit 130. Also, the control unit 120 transmits the information stored in the memory unit 130 to the outside (e.g., other communication devices) through a wireless / wired interface by the communication unit 110, or stores the information received from the outside (e.g., other communication devices) through a wireless / wired interface by the communication unit 110 in the memory unit 130.

[0255] The additional element 140 is configured in various ways depending on the type of wireless device. For example, the additional element 140 includes any one of a power unit / battery, an input / output unit (I / O unit), a drive unit, and a computer unit. Without being limited thereto, the wireless device is embodied in forms such as a robot (FIG. 5, 100a), a vehicle (FIG. 5, 100b-1, 100b-2), an XR device (FIG. 5, 100c), a portable device (FIG. 5, 100d), a home appliance (FIG. 5, 100e), an IoT device (FIG. 5, 100f), a digital broadcast terminal, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or financial device), a security device, a climate / environment device, an AI server / device (FIG. 5, 400), a base station (FIG. 5, 200), and a network node. The wireless device is movable depending on the usage example / service or is used at a fixed location.

[0256] In FIG. 7, various elements, components, units / parts, and / or modules within the wireless devices 100 and 200 are all connected to each other by a wired interface or at least some of them are wirelessly connected by the communication unit 110. For example, within the wireless devices 100 and 200, the control unit 120 and the communication unit 110 are wired-connected, and the control unit 120 and the first unit (for example, 130, 140) are wirelessly connected by the communication unit 110. Also, each element, component, unit / part, and / or module within the wireless devices 100 and 200 further includes one or more elements. For example, the control unit 120 is composed of one or more sets of processors. For example, the control unit 120 is composed of a set including a communication control processor, an application processor, an ECU (Electronic control Unit), a graphics processing processor, a memory control processor, etc. As another example, the memory unit 130 is composed of a RAM (Random Access Memory), a DRAM (Dynamic RAM), a ROM (Read Only Memory), a flash memory, a volatile memory, a non-volatile memory, and / or a combination thereof.

[0257] Example of a vehicle or autonomous driving vehicle to which the present invention is applied

[0258] FIG. 8 is a diagram illustrating a vehicle or an autonomous vehicle to which the present invention is applied. The vehicle or the autonomous vehicle is embodied as a mobile robot, a vehicle, a train, an aerial vehicle (AV) with / without a pilot, a ship, or the like.

[0259] Referring to FIG. 8, the vehicle or the autonomous vehicle 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 is part of the communication unit 110. Blocks 110 / 130 / 140a to 140d respectively correspond to blocks 110 / 130 / 140 in FIG. 6.

[0260] The communication unit 110 transmits and receives signals (such as data, control signals, etc.) with external devices such as other vehicles, base stations (e.g., base stations, roadside units, etc.), and servers. The control unit 120 controls the elements of the vehicle or the autonomous driving vehicle 100 to perform various operations. The control unit 120 includes an ECU (Electronic Control Unit). The driving unit 140a enables the vehicle or the autonomous driving vehicle 100 to travel on the ground. The driving unit 140a includes an engine, a motor, a power train, wheels, brakes, a steering device, etc. The power supply unit 140b supplies power to the vehicle or the autonomous driving vehicle 100 and includes a wired / wireless charging circuit, a battery, etc. The sensor unit 140c can obtain vehicle state, surrounding environment information, user information, etc. The sensor unit 140c includes an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight sensing sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, etc. The autonomous driving unit 140d implements technologies such as maintaining the lane during driving, automatically adjusting the speed like an adaptive cruise control device, automatically driving along a predetermined route, and automatically setting and driving along a route when a destination is set.

[0261] As an example, the communication unit 110 receives map data, traffic information data, etc. from an external server. The autonomous driving unit 140d generates an autonomous driving route and a drive plan based on the obtained data. The control unit 120 controls the driving unit 140a so that the vehicle or the autonomous driving vehicle 100 moves along the autonomous driving route according to the drive plan (for example, speed / direction adjustment). The communication unit 110 periodically obtains the latest traffic information data from the external server during autonomous driving and also obtains traffic information data of surrounding vehicles from the surrounding vehicles. Further, the sensor unit 140c obtains vehicle state and surrounding environment information during autonomous driving. The autonomous driving unit 140d updates the autonomous driving route and the drive plan based on the newly obtained data / information. The communication unit 110 transmits information regarding the vehicle position, the autonomous driving route, the drive plan, etc. to the external server. The external server can predict traffic information data in advance using AI technology, etc. based on the information collected from the vehicle or the autonomous driving vehicle and provide the predicted traffic information data to the vehicle or the autonomous driving vehicle.

[0262] It is obvious to those skilled in the art that the present invention can be embodied in other specific forms without departing from the features of the present invention. Therefore, the above detailed description should not be construed restrictively in all aspects and should be considered as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

Industrial Applicability

[0263] As described above, the present invention can be applied to various wireless communication systems.

Claims

1. A method for a terminal (UE) to monitor control signals in a wireless communication system, comprising: receiving a search space set configuration including information on the number of Physical Downlink Control Channel (PDCCH) candidates per set level of Control Channel Elements (CCEs); monitoring the PDCCH candidates for a Downlink Control Information (DCI) format on a scheduling cell based on the search space set configuration, wherein the DCI format is a DCI format for scheduling a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH) on one or more scheduled cells that are different from each other; wherein the number of the PDCCH candidates is set based on all or a part of combinations of the scheduled cells; A signal monitoring method.

2. The combination includes cells that are actually scheduled simultaneously among the scheduled cells schedulable by the DCI format. The signal monitoring method according to Claim 1.

3. The number of the PDCCH candidates is set independently for each combination. The signal monitoring method according to Claim 1.

4. The number of the PDCCH candidates is determined based on representative cells included in the combination. The signal monitoring method according to Claim 1.

5. The number of the PDCCH candidates is the same as the number of PDCCH candidates per set level of CCEs set for the representative cells. The signal monitoring method according to Claim 4.

6. The search space set configuration is a search space set configuration for the representative cells. The signal monitoring method according to Claim 4.

7. The search space set for the scheduling cell and the search spaces set for one or more specific cells among the scheduled cells are connected to each other by the same search space ID. The signal monitoring method according to Claim 1.

8. The combination includes the specific cells and cells that are not the specific cells. The signal monitoring method according to Claim 7.

9. The search space set configuration for the scheduling cell includes parameters for configuring the DCI format, wherein the parameters include only information regarding the DCI format, The signal monitoring method according to claim 7.

10. The search space set configuration for the scheduling cell includes parameters for configuring the DCI format, wherein the parameters include both information regarding the DCI format and information regarding a DCI format different from the DCI format, The signal monitoring method according to claim 7.

11. A terminal for monitoring signals in a wireless communication system, at least one transceiver, at least one processor, at least one memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform a specific operation, wherein the specific operation includes receiving a search space set configuration including information regarding the number of PDCCH (physical downlink control channel) candidates per set level of CCE (control channel element); monitoring the PDCCH candidates for a DCI (downlink control information) format on a scheduling cell based on the search space set configuration; wherein the DCI format is a DCI format for scheduling a PDSCH (physical downlink shared channel) or a PUSCH (physical uplink shared channel) on a scheduled cell different from each other, and the number of the PDCCH candidates is set based on all or a combination of a part of the scheduled cells, A terminal.

12. An apparatus for a terminal, at least one processor, at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform an operation, and the operation Receiving a search space set configuration including information on the number of Physical Downlink Control Channel (PDCCH) candidates per set level of Control Channel Elements (CCEs); Monitoring the PDCCH candidates for a Downlink Control Information (DCI) format on a scheduling cell based on the search space set configuration; and The DCI format is a DCI format for scheduling a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH) on different scheduled cells; The number of the PDCCH candidates is set based on all or a combination of some of the scheduled cells; An apparatus. **Claim 13** A computer-readable non-transitory storage medium including at least one computer program for causing at least one processor to perform operations, the operations including: Receiving a search space set configuration including information on the number of Physical Downlink Control Channel (PDCCH) candidates per set level of Control Channel Elements (CCEs); Monitoring the PDCCH candidates for a Downlink Control Information (DCI) format on a scheduling cell based on the search space set configuration; and The DCI format is a DCI format for scheduling a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH) on different scheduled cells; The number of the PDCCH candidates is set based on all or a combination of some of the scheduled cells; A storage medium.

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