Method and apparatus for monitoring control signals in a wireless communication system

Abstract

In the wireless communication system according to the present invention, the method and device for monitoring signals includes a different setting of the combination of X and Y from the conventional one. Specifically, a method for setting the combination of X and Y depending on whether information on the PDCCH monitoring capability of the serving cell is provided is provided. Also, a method for resetting the number of BDs / CCEs based on a slot group is provided.

Description

[Technical Field]

[0001] The present invention relates to a method and apparatus for use in a wireless communication system. [Background technology]

[0002] Wireless communication systems have been widely deployed to provide various communication services such as voice and data. Generally, wireless communication systems are multiple access systems that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power, etc.). Examples of multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and single carrier frequency division multiple access (SC-FDMA) systems. Summary of the Invention [Problem to be solved by the invention]

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

[0004] The technical object of the present invention is not limited to the above-mentioned technical object, and other technical objects can be inferred from the embodiments of the present invention. [Means for solving the problem]

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

[0006] As an aspect of the present invention, there is provided a method for a terminal to monitor a control signal in a wireless communication system, the method including the steps of: configuring a combination of X and Y for monitoring a physical downlink control channel (PDCCH) in a serving cell, where X is the number of consecutive slots included in a slot-group, the slot-group being repeated consecutively without overlapping, and Y is the number of consecutive slots within the X slots; and monitoring the PDCCH based on the combination of X and Y on the serving cell, wherein the combination of X=4 and Y=1 is used based on (i) no information on PDCCH monitoring capability for the serving cell is provided and (ii) 480 kHz SCS (subcarrier spacing) is configured for the serving cell, and the combination of X=8 and Y=1 is used based on (i) no information on PDCCH monitoring capability for the serving cell is provided and (ii) 960 kHz SCS is configured for the serving cell.

[0007] In another aspect of the invention, an apparatus, processor and storage medium for performing a signal monitoring method are provided.

[0008] In the method and apparatus, (i) information on PDCCH monitoring capability is provided in association with a plurality of combinations of X and Y, and (ii) a search space set is associated with at least two combinations of the plurality of combinations of X and Y, based on which a PDCCH is monitored by a particular combination of X and Y in association with a maximum M and C among the at least two combinations, where M is (i) a serving cell and (ii) a maximum number of monitored PDCCH candidates in a group of X slots per combination of X and Y per serving cell, and C is (i) a serving cell and (ii) a maximum number of non-overlapped control channel elements (CCEs) in a group of X slots per combination of X and Y per serving cell.

[0009] In the method and apparatus, a plurality of serving cells for PDCCH monitoring including a serving cell are configured, the plurality of serving cells include the same X slots as the serving cell, and the number of PDCCH candidates to be monitored in the X slots in the plurality of serving cells is reconfigured based on the fact that the number of the plurality of serving cells exceeds the maximum number of cells for which the terminal can monitor the PDCCH.

[0010] In the method and apparatus, a plurality of serving cells for PDCCH monitoring including a serving cell are configured, the plurality of serving cells include the same X slots as the serving cell, and the number of non-overlapped control channel elements (CCEs) to be monitored in the X slots in the plurality of serving cells is reconfigured based on the number of the plurality of serving cells exceeding the maximum number of cells for which the terminal is capable of PDCCH monitoring.

[0011] The communication device includes at least a terminal, a network, and an autonomous vehicle capable of communicating with other autonomous vehicles other than the communication device.

[0012] The above-described aspects of the present invention are merely some of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention will be apparent to those skilled in the art based on the detailed description of the present invention below. [Effects of the Invention]

[0013] According to one embodiment of the present invention, when a control signal is monitored in a terminal, there is an advantage that more efficient signal monitoring can be performed due to an operation differentiated from the conventional invention.

[0014] The technical effects of the present invention are not limited to the above-mentioned technical effects, and other technical effects may be inferred from the embodiments of the present invention. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a diagram illustrating the structure of a radio frame. [Figure 2] FIG. 1 illustrates a resource grid of slots. [Figure 3] 1 shows an example of mapping physical channels into slots. [Figure 4]A method for signal monitoring according to an embodiment of the present invention will now be described. [Figure 5] A method for signal monitoring according to an embodiment of the present invention will now be described. [Figure 6] A method for signal monitoring according to an embodiment of the present invention will now be described. [Figure 7] 1 illustrates an example of an apparatus according to an embodiment of the present invention. [Figure 8] 1 illustrates an example of an apparatus according to an embodiment of the present invention. [Figure 9] 1 illustrates an example of an apparatus according to an embodiment of the present invention. [Figure 10] 1 illustrates an example of an apparatus according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] The following technologies can be used for various wireless access 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), and 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 a part of E-UMTS (Evolved UMTS) that uses E-UTRA, and LTE-A (Advanced) / 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.

[0017] For clarity, the following description will be based on a 3GPP communication system (e.g., LTE-A, NR), but the technical concept of the present invention is not limited thereto. LTE refers to technology from 3GPP TS 36.xxx Release 8 onward. Specifically, LTE technology from 3GPP TS 36.xxx Release 10 onward is called LTE-A, and LTE technology from 3GPP TS 36.xxx Release 13 onward is called LTE-A pro. 3GPP NR refers to technology from TS 38.xxx Release 15 onward. LTE / NR can also be referred to as a 3GPP system. "xxx" refers to the detailed number of the standard document. LTE / NR is collectively referred to as a 3GPP system. For background technology, terms, abbreviations, etc. used in the description of the present invention, please refer to the matters described in the standard documents previously published by the present invention. For example, please refer to the following documents:

[0018] 3GPP NR

[0019] -38.211: Physical channels and modulation

[0020] -38.212: Multiplexing and channel coding

[0021] -38.213: Physical layer procedures for control

[0022] -38.214: Physical layer procedures for data

[0023] -38.300: NR and NG-RAN Overall Description

[0024] -38.331: Radio Resource Control (RRC) protocol specification

[0025] FIG. 1 illustrates the structure of a radio frame used in NR.

[0026] In NR, uplink (UL) and downlink (DL) transmissions are organized into 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 subframes (SF). A subframe is divided into one or more slots, and the number of slots in a subframe depends on the subcarrier spacing (SCS). Each slot contains 12 or 14 OFDM(A) symbols depending on the cyclic prefix (CP). If a normal CP is used, each slot contains 14 symbols. If an extended CP is used, each slot contains 12 symbols. Here, a symbol can include an OFDM symbol (or a CP-OFDM symbol) or an SC-FDMA symbol (or a DFT-s-OFDM symbol).

[0027] Table 1 illustrates that when a general CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS.

[0028] [Table 1] * N slot symb : Number of symbols in the slot * N frame,u slot : Number of slots in the frame * N subframe,u slot : Number of slots in a subframe

[0029] Table 2 illustrates that when an extended CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS.

[0030] [Table 2]

[0031] In an NR system, multiple cells merged to one terminal (User Equipment; UE) have different OFDM(A) pneumatic configurations (e.g., SCS, CP length, etc.), which results in different (absolute time) durations of time resources (e.g., SF, slot, or TTI) (collectively referred to as TU (Time Unit) for convenience) consisting of the same number of symbols.

[0032] NR supports multiple Orthogonal Frequency Division Multiplexing (OFDM) pneumonologies (e.g., subcarrier spacing, SCS) to support various 5G services. For example, a 15 kHz SCS supports wide areas in traditional cellular bands, while a 30 kHz / 60 kHz SCS supports dense urban areas, lower latency, and wider carrier bandwidths.

[0033] The NR frequency band is defined by two types of frequency ranges (FR) (FR1 / FR2). FR1 / FR2 are configured as shown in Table 3 below. FR2 also stands for millimeter wave (mmW).

[0034] [Table 3]

[0035] Figure 2 illustrates the slot structure of an NR frame.

[0036] A slot contains multiple symbols in the time domain. For example, in the case of a general CP, one slot contains 14 symbols, while in the case of an extended CP, one slot contains 12 symbols. A carrier contains multiple subcarriers in the frequency domain. An RB (Resource Block) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. Multiple RB interlaces (simply referred to as interlaces) are defined in the frequency domain. Interlace m ∈ {0, 1, ..., M-1} is composed of (common) RBs {m, M+m, 2M+m, 3M+m, ...}, where M represents the number of interlaces. A BWP (Bandwidth Part) is defined as multiple consecutive RBs (e.g., physical RBs, PRBs) in the frequency domain and can correspond to one OFDM numerology (e.g., SCS(u), CP length, etc.). A carrier contains up to N (e.g., 5) BWPs. Data communication is performed using the activated BWP, and only one BWP can be activated for one terminal within one cell / carrier. Each element in the resource grid is called a resource element (RE), and one modulation symbol can be mapped to it.

[0037] In a wireless communication system, a terminal receives information from a base station via a downlink (DL), and the terminal transmits information to the base station via an uplink (UL). Information exchanged between the base station and the terminal includes data and various control information, and various physical channels / signals exist depending on the type / purpose of the information exchanged. A physical channel corresponds to a set of resource elements (RE) that carry information derived from a higher layer. A physical signal corresponds to a set of resource elements (RE) used by a physical layer (PHY), but does not carry information derived from a higher layer. Higher layers include a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, etc.

[0038] DL physical channels include PBCH (Physical Broadcast channel), PDSCH (Physical Downlink Shared channel), and PDCCH (Physical Downlink Control channel). DL physical signals include DL RS (Reference Signal), PSS (Primary synchronization signal), and SSS (Secondary synchronization signal). DL RSs include DM-RS (Demodulation RS), PT-RS (Phase-tracking RS), and CSI-RS (Channel-state information RS). UL physical channels include PRACH (Physical Random Access Channel), PUSCH (Physical Uplink Shared Channel), and PUCCH (Physical Uplink Control Channel). UL physical signals include UL RSs. UL RSs include DM-RS, PT-RS, and SRS (Sounding RS).

[0039] FIG. 3 shows an example of mapping physical channels within a slot.

[0040] A single slot contains the DL control channel, DL or UL data, and UL control channel. For example, the first N symbols in a slot are used to transmit the DL control channel (hereinafter referred to as the DL control region), and the last M symbols in the slot are used to transmit the UL control channel (hereinafter referred to as the UL control region). N and M are integers equal to or greater than 0. The resource region between the DL control region and the UL control region (hereinafter referred to as the data region) is used to transmit DL data or UL data. A time gap exists between the control region and the data region for DL-to-UL or UL-to-DL switching. The PDCCH is transmitted in the DL control region, and the PDSCH is transmitted in the DL data region. Some symbols at the time of switching from DL to UL within a slot are used as the time gap.

[0041] In the present invention, the base station is, for example, a gNodeB.

[0042] Downlink (DL) physical channels / signals

[0043] (1) PDSCH

[0044] The PDSCH carries downlink data (e.g., DL-shared channel transport block (DL-SCH TB)). The TB is encoded into a codeword (CW) and then transmitted after undergoing scrambling and modulation processes. The CW includes one or more code blocks (CB). One or more CBs are grouped into a CBG (CB group). 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 precoded, mapped to resources along with DMRS, and transmitted from the corresponding antenna port. The PDSCH is dynamically scheduled by the PDCCH (configured 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, in dynamic scheduling, PDSCH transmission is accompanied by PDCCH, whereas in CS, PDSCH transmission is not accompanied by PDCCH. CS includes SPS (semi-persistent scheduling).

[0045] (2) PDCCH

[0046] The PDCCH carries Downlink Control Information (DCI). For example, the PCCCH (i.e., DCI) carries the transmission format and resource allocation of the DL-SCH, frequency / time resource allocation information for the UL-SCH (shared channel), paging information for the PCH (paging channel), system information on the DL-SCH, frequency / time resource allocation information for higher layer control messages such as a random access response (RAR) transmitted on the PDSCH, transmit power control commands, and information on activation / deactivation of SPS / CS (Configured Scheduling). Various DCI formats are provided depending on the information in the DCI.

[0047] Table 4 illustrates an example of a DCI format transmitted via the PDCCH.

[0048] [Table 4]

[0049] DCI format 0_0 is used to schedule a TB-based (or TB-level) PUSCH, and DCI format 0_1 ​​is used to schedule a TB-based (or TB-level) PUSCH or a Code Block Group (CBG)-based (or CBG-level) PUSCH. DCI format 1_0 is used to schedule a TB-based (or TB-level) PDSCH, and DCI format 1_1 is used to schedule a TB-based (or TB-level) PDSCH or a 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 convey dynamic slot format information (e.g., dynamic SFI) to a UE, and DCI format 2_1 is used to convey downlink pre-emption information to a UE. DCI format 2_0 and / or DCI format 2_1 are transmitted to terminals in a corresponding group via a group common PDCCH, which is a PDCCH transmitted to terminals defined as one group.

[0050] The PDCCH / DCI includes a cyclic redundancy check (CRC), and the CRC is masked / scrambled to various identifiers (e.g., Radio Network Temporary Identifier, RNTI) depending on the owner or use of the PDCCH. For example, if the PDCCH is for a specific terminal, the CRC is masked to a Cell-RNTI (C-RNTI). If the PDCCH is related to paging, the CRC is masked to a P-RNTI (Paging-RNTI). If the PDCCH is related to system information (e.g., System Information Block, SIB), the CRC is masked to a System Information RNTI (SI-RNTI). If the PDCCH is related to an unsolicited access response, the CRC is masked to a Random Access-RNTI (RA-RNTI).

[0051] Table 5 shows an example of the use and transmission channel of the PDCCH according to the RNTI. The transmission channel indicates the transmission channel associated with the data carried by the PDSCH / PUSCH scheduled by the PDCCH.

[0052] [Table 5]

[0053] The modulation method of the PDCCH is fixed (e.g., Quadrature Phase Shift Keying, QPSK), and one PDCCH consists of 1, 2, 4, 8, or 16 CCEs (Control Channel Elements) depending on the aggregation level (AL). One CCE consists of six resource element groups (REGs). One REG is defined by one OFDM symbol and one PRB.

[0054] The PDCCH is transmitted in a CORESET (Control Resource Set). The CORESET corresponds to a set of physical resources / parameters used to carry the PDCCH / DCI in the BWP. For example, the CORESET includes a REG set having a predetermined pneumatics (e.g., SCS, CP length, etc.). The CORESET is configured by system information (e.g., MIB) or UE-specific higher layer (e.g., RRC) signaling. Examples of parameters / information used to configure the CORESET are as follows: One or more CORESETs are configured for one UE, and multiple CORESETs are superimposed in the time / frequency domain.

[0055] - controlResourceSetId: Indicates the identification information (ID) of the CORESET.

[0056] - frequencyDomainResources: Indicates the frequency domain resources of 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 in the BWP. The RB group corresponding to the bit whose bit value is 1 is assigned to the frequency domain resources of CORESET.

[0057] - duration: indicates the time domain resource of CORESET. It indicates the number of consecutive OFDMA symbols that make up CORESET. For example, duration has a value of 1 to 3.

[0058] - cce-REG-MappingType: Indicates the CCE-to-REG mapping type. Interleaved and non-interleaved types are supported.

[0059] - precoderGranularity: indicates the precoder granularity in the frequency domain.

[0060] - 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 the Quasi-Co-Location (QCL) relationship between DL RSs and PDCCH DMRS ports within the RS set (TCI-State).

[0061] - tci-PresentInDCI: Indicates whether the TCI field in the DCI is included or not.

[0062] - pdcch-DMRS-ScramblingID: indicates the information used to initialize the PDCCH DMRS scrambling sequence.

[0063] For PDCCH reception, the UE monitors a set of PDCCH candidates in CORESET (e.g., blind decoding). PDCCH candidates indicate the CCEs that the UE monitors for PDCCH reception / detection. PDCCH monitoring is performed in one or more CORESETs on an active DL BWP in each activated cell where PDCCH monitoring is configured. The set of PDCCH candidates that the UE 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.

[0064] Table 6 illustrates the PDCCH search space.

[0065] [Table 6]

[0066] The SS set is configured by system information (e.g., MIB) or UE-specific higher layer (e.g., RRC) signaling. S (e.g., 10) or less SS sets are configured for each DL BWP of the serving cell. 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.

[0067] - searchSpaceId: Indicates the ID of the SS set.

[0068] - controlResourceSetId: Indicates the CORESET associated with the SS set.

[0069] - monitoringSlotPeriodicityAndOffset: Indicates the PDCCH monitoring periodicity period (in slot units) and the PDCCH monitoring period offset (in slot units).

[0070] - monitoringSymbolsWithinSlot: Indicates the first OFDMA symbol for PDCCH monitoring in a slot where PDCCH monitoring is configured. It is indicated by a bitmap, and each bit corresponds to each OFDMA symbol in the slot. The MSB of the bitmap corresponds to the first OFDMA symbol in the slot. The OFDMA symbol corresponding to a bit whose bit value is 1 corresponds to the first symbol of CORESET in the slot.

[0071] - nrofCandidates: Indicates the number of PDCCH candidates for AL={1, 2, 4, 8, 16} (e.g., 0, 1, 2, 3, 4, 5, 6, 8).

[0072] - searchSpaceType: Indicates whether the SS type is CSS or USS.

[0073] - DCI format: Indicates the DCI format of the PDCCH candidate.

[0074] Based on the CORESET / SS set configuration, a terminal can monitor PDCCH candidates in one or more SS sets within a slot. An opportunity (e.g., time / frequency resource) for monitoring PDCCH candidates is defined as a PDCCH (monitoring) opportunity. One or more PDCCH (monitoring) opportunities are configured within a slot.

[0075] 1. Control channel monitoring in high frequency bands

[0076] The above content can be applied in combination with the method proposed in the present invention to be described later, or is supplemented to clarify the technical features of the method proposed in the present invention.

[0077] Furthermore, the method described below can be similarly applied to the aforementioned NR system (licensed band) or shared spectrum, and it goes without saying that it can be modified or substituted to suit the terms, expressions, structures, etc. defined in each system so that the technical ideas proposed in the present invention can be embodied in the relevant system.

[0078] The NR system supports multiple pneumothoraxes (or subcarrier spacing, SCS) to support various 5G services. For example, a 15 kHz SCS supports wide areas in traditional cellular bands, a 30 kHz / 60 kHz SCS supports dense urban areas, lower latency, and wider carrier bandwidths, and an SCS of 60 kHz or higher supports bands above 24.25 GHz. Until Release 16, NR frequency bands were defined as two types of frequency ranges (FR1 and FR2) and are configured as shown in Table 3. In addition, discussions are underway to support the NR system in frequency bands above the FR1 / FR2 bands (e.g., 52.6 GHz to 71 GHz).

[0079] A frequency band higher than the FR1 and FR2 bands (for example, 52.6 GHz to 114.25 GHz band, particularly 52.6 GHz to 71 GHz) is referred to as FR2-2. The waveform, SCS, CP length, timing, etc. defined for FR1 and FR2 in conventional NR systems do not need to apply to FR2-2.

[0080] In the FR2-2 band, SCSs of 120 kHz, 480 kHz, and 960 kHz are used for NR operation. For 480 kHz and 960 kHz SCSs, the length of an OFDM symbol is shorter than that of 120 kHz. For example, a 480 kHz OFDM symbol is 1 / 4 times longer than a 120 kHz OFDM symbol, and a 960 kHz OFDM symbol is 1 / 8 times longer than a 120 kHz OFDM symbol. For short-length slots where 480 kHz and 960 kHz are applied, if PDCCH monitoring is performed in all slots, power consumption and other factors can be a burden on the UE. Therefore, when an SCS of 480 kHz and / or 960 kHz is configured, multi-slot PDCCH monitoring is introduced.

[0081] Multi-slot PDCCH monitoring refers to the operation of performing PDCCH monitoring by defining Blind Decoding (BD) / control channel element (CCE) limits based on multiple consecutive slots as a reference and / or unit. In the conventional NR rel-15, the BD / CCE limits are defined per slot, while in NR rel-16, the BD / CCE limits are defined per span confined within one slot. A span refers to a PDCCH monitoring unit consisting of consecutive symbols. The BD limit refers to the "Maximum number of monitored PDCCH candidates for a DL BWP with SCS configuration for a single serving cell" in the 3GPP standard, and the CCE limit refers to the "Maximum number of non-overlapped CCEs for a DL BWP with SCS configuration for a single serving cell" in the 3GPP standard. In conventional NR rel-15 / 16, a span is defined as consecutive PDCCH monitoring occasions (MOs), which are in the form of consecutive symbols within a slot.

[0082] A slot-group consists of a specific number (denoted by X) of consecutive slots. Within one slot-group, BD / CCE restrictions are defined for another specific number (denoted by Y) of consecutive slots (or symbols). For example, for 480 kHz, a slot-group is determined as four consecutive slots, and BD / CCE restrictions for PDCCH monitoring are defined for two consecutive slots within that slot-group. Therefore, X=4, and Y is the slot unit, so Y=2. As another example, for 960 kHz, a slot-group is determined as eight consecutive slots, and BD / CCE restrictions for PDCCH monitoring are defined for four consecutive slots within that slot-group. Therefore, X=8, and Y is the slot unit, so Y=4. These two examples are one of the application solutions being discussed in the 3GPP RAN1 WG, and have the advantage that the slot-groups for 480 kHz and / or 960 kHz are equal to the slot length of the 120 kHz SCS. Furthermore, the number of slots or symbols that make up Y can be changed by higher layer signaling such as RRC or by UE capability signaling, and the position of Y within X can also be changed in a similar manner.

[0083] On the other hand, a terminal (e.g., UE) that supports carrier aggregation can limit the number of DL cells that can perform BD / CCE (according to the specifications) as shown in Table 7 below (see 10 of 3GPP 38.214). JPEG0007807530000007.jpg11125, hereafter referred to as N_cap) to the network (e.g., gNB) using pdcch-BlindDetectionCA, and the network also reports the number of DL serving cells ( JPEG0007807530000008.jpg11119, hereinafter referred to as N_dl) is set. In this invention, the specification means the technical content described in the conventional 3GPP document.

[0084] [Table 7]

[0085] If N_dl<=N_cap, the terminal performs PDCCH monitoring for each cell up to the BD / CCE limit set for each serving cell. However, if N_dl>N_cap, performing PDCCH monitoring for each cell up to the BD / CCE limit set for each serving cell will exceed the PDCCH monitoring capability (i.e., N_cap) reported by the terminal. Therefore, the terminal may change the BD / CCE limit for each cell according to a predetermined rule. Changing the BD / CCE limit for each cell by the terminal according to a predetermined rule is called BD / CCE reconfiguration. Table 8 is an excerpt from 10.1 of 3GPP 38.214, which shows an example of BD / CCE reconfiguration. Table 8 shows the BD and CCE limits for slot-based (per-slot) PDCCH monitoring. JPEG0007807530000010.jpg9104 is reconfigured in slot units using N_cap and N_dl. Meanwhile, the same document also discloses details regarding per-span PDCCH monitoring.

[0086] [Table 8]

[0087] When multiple cells with multi-slot monitoring are aggregated (CA), if the X and / or Y of each cell are set to be different, ambiguity may occur when the BD / CCE limit is reset. For example, as shown in FIG. 4, for a cell with 480 kHz SCS, X = 4 and Y = 2, where Y is set to the first two slots within X, and for a cell with 960 kHz SCS, X = 8 and Y = 4, where Y is set to the 3rd to 6th slots within X. When the BD / CCE limit is reset in a situation where N_cap < N_dl, it becomes ambiguous which slot interval should be used as a reference.

[0088] Also, in a CA situation where both 120 kHz and 480 kHz (or 960 kHz) are set, when both single-slot (single-slot) PDCCH monitoring and multi-slot PDCCH monitoring are used, the ambiguous situation as described above occurs. In this invention, a method for resetting the BD / CCE limit in various CA situations where both single-slot PDCCH monitoring and multi-slot PDCCH monitoring are used will be described.

[0089] 1.1. Method for BD / CCE Restriction Reconfiguration for Multi-Slot PDCCH Monitoring in CA Situations

[0090] In Rel-15 / 16 NR, the following formula is used for resetting the BD / CCE limit consisting of single-slot PDCCH monitoring cells. Such resetting is performed in the situation of JPEG0007807530000012.jpg11106.

[0091]

Equation

[0092]

Equation

[0093] Even for CA consisting of multi-slot PDCCH monitoring cells, the number of DL cells configured in the UE is greater than N_cap. In JPEG0007807530000015.jpg10116, it is necessary to reset the BD / CCE restrictions. For this purpose, modified equations such as Equations 3 and 4 are used.

[0094]

number

[0095]

number

[0096] In this equation, the variable Mslot can be understood as a variable for single-slot PDCCH monitoring that has been modified for multi-slot PDCCH monitoring. For example, JPEG0007807530000018.jpg10117 means the BD restriction in multiple consecutive slots (i.e., maximum number of monitored PDCCH candidates per multi-slot for a DL BWP with SCS configuration μ for a serving cell). JPEG0007807530000019.jpg11100 means the number of DL cells configured for multi-slot PDCCH monitoring of the UE and having an SCS setting of μ. JPEG0007807530000020.jpg11106 refers to all DL cells configured in the UE with SCS configuration μ, including both single-slot PDCCH monitoring cells and multi-slot PDCCH monitoring cells. J refers to the set of SCS configuration μ for all cells included in CA.

[0097] 1.2. BD / CCE Reconfiguration Method in CA Situation Including Multi-Slot PDCCH Monitoring Cell

[0098] In the CA situation of multiple cells including a cell with multi-slot PDCCH monitoring set (for example, a cell set as 480 kHz and / or 960 kHz SCS), when N_cap < N_dl, BD / CCE reconfiguration is required. At this time, according to the positions and sizes of X and / or Y for setting multi-slot PDCCH monitoring, the reference intervals for BD / CCE reconfiguration are different. At this time, in the proposed method described later, the slot-group of a cell with single-slot monitoring set can be interpreted as 1 slot (that is, X = 1) for the SCS of that cell. Y of a cell with single-slot monitoring set can also be interpreted as 1 slot.

[0099] 1.2 - 1) When the positions and sizes of X of all cells included in CA are the same. That is, when the boundaries between slot-groups are aligned

[0100] - When the slot-group X of all cells (or component carriers) is the same, BD / CCE reconfiguration is performed using Equation 3 and Equation 4. At this time, the cells have different numerologies or SCSs. In this case, the reference interval for reconfiguration is the slot-group. The terminal compares N_cap and N_dl in units of X slots which are slot-groups, and if N_cap < N_dl, it reconfigures BD / CCE.

[0101] More restrictively, only when the slot-groups of all cells are timely aligned and Y of all cells is the same, the terminal reconfigures BD / CCE using Equation 3 and Equation 4. In this case, the reference interval for reconfiguration is the Y slot or symbol.

[0102] - If the slot-groups X of all cells are the same but Y are not aligned in time, different reference intervals are applied to reset the BD / CCE using Equations 3 and 4. In this case, the cells may have different pneumatologies. Alternatively, multiple cells may have the same pneumatology. In this case, the reference interval for resetting the BD / CCE is set using three methods.

[0103] 1.2-1-(1) The reference period for reconfiguration is set based on the maximum Y among the Ys set for all cells included in CA. That is, if the maximum Y includes the "Union of PDCCH monitoring occasion on all serving cells," the maximum Y is set as the reference period for reconfiguration, and BD / CCE is reconfigured.

[0104] 1.2-1-(2) If the "Union of PDCCH monitoring occasion on all serving cells" is included within the upper bound of Y, the upper bound of Y (= Y_upper) is set as the reference interval for reconfiguration. The size of Y_upper is set to a value smaller than or equal to X. For example, for 480 kHz and 960 kHz SCS, Y_upper may be set to 4 or Y_upper = X / 2. Y_upper may be pre-defined according to the SCS or set by signaling such as RRC. For example, a value such as Y_upper = X / 2 may be pre-defined as a default value. In this case, the start point of Y_upper is determined to be the symbol including the first PDCCH MO for all cells. A predetermined number (e.g., X / 2) of consecutive symbols from the determined start symbol are set as the reference interval for BD / CCE reconfiguration.

[0105] 1.2-1-(3) In all cases that do not fall under 1.2-1-(1) or 1.2-1-(2), the slot group, i.e., the X slot, is set as the reference interval for BD / CCE reconfiguration.

[0106] 1.2-2) When the slot-group boundary is not aligned

[0107] This applies to all cases where slot-groups in cells included in CA are not aligned in time, or where the starting slot and symbol of the slot-groups are the same but the sizes of the slot-groups are different. In this case, the terminal configures a reference SCS and uses a slot corresponding to the reference SCS as the reference interval for BD / CCE reconfiguration. The reference SCS is one of the SCSs configured in the cells included in CA. For example, the reference SCS is the smallest SCS among the configured SCSs. Alternatively, the reference SCS is an SCS that is not configured in the cell configured for the terminal.

[0108] For example, in the FR2-2 band, 120 kHz is a mandatory SCS, and 480 kHz and 960 kHz are optional SCSs. In this invention, "mandatory a" means that the terminal must support a, and "optional a" means that the terminal can support or not support a. In this case, even if a cell configured with 480 kHz or 960 kHz does not participate in CA with a cell configured with a 120 kHz SCS, the 120 kHz SCS is determined as the reference SCS. Information regarding the reference SCS is configured in the UE by signaling such as RRC. Alternatively, the reference SCS is determined by a combination of SCSs of cells included in CA or is predefined. For example, in the FR2-2 band, 120 kHz is used as the reference SCS. Alternatively, 120 kHz is determined as the reference SCS only if 120 kHz is present among the SCSs of cells included in CA.

[0109] As another method for when slot-group boundaries are not aligned, X consecutive slots for a specific cell included in CA are determined as the reference interval for BD / CCE reconfiguration. In this case, the specific cell is determined to be the cell with the lowest or highest cell index among cells having the same pneumatology. Alternatively, the specific cell may be configured / instructed by the base station using parameters such as RRC. More specifically (or specifically), the cell with the lowest or highest cell index among cells having the same pneumatology and / or the same X and / or the same Y is determined to be the specific cell.

[0110] In this case, the cells may have different pneumologies. Alternatively, multiple cells may have the same pneumology. The UE performs BD / CCE reconfiguration in the set reference interval using Equation 3 and Equation 4. Alternatively, even if the slot-groups are not aligned, if the "Union of PDCCH monitoring occasion on all serving cells" of all cells included in the CA is included within the maximum Y or Y_upper (similar to the above-described method 1.2-1-(1) or 1.2-2-(2)), the UE sets the maximum Y or Y_upper as the reference interval for BD / CCE reconfiguration.

[0111] 1.2-3) CA situation including cells where multi-slot PDCCH monitoring is performed on an (X, Y)-span basis

[0112] For multi-slot PDCCH monitoring, when BD / CCE restrictions are determined on an (X, Y) span basis, Equations 3 and 4 are applied to a span consisting of multi-slots or multi-symbols. In this case, in (X, Y), X represents the minimum interval between spans, and Y represents the maximum size of the span. In addition, the above-mentioned process of comparing N_cap and N_dl based on X slots to determine whether BD / CCE reconfiguration is necessary and the method of setting the reference interval for reconfiguration are applied based on a span consisting of multiple slots or symbols.

[0113] For example, when the above-mentioned union of PDCCH MOs is included in the maximum Y or Y_upper, the process of BD / CCE reconfiguration with the maximum Y or Y_upper as a specific time interval is also applied to (X, Y) span-based multi-slot PDCCH monitoring, where Y represents multiple consecutive slots or multiple consecutive symbols.

[0114] As another example, if there is no aligned specific time interval between cells included in the CA, the UE determines the slot length of the reference SCS as the specific time interval and performs BD / CCE reconfiguration or calculates the BD / CCE restriction. As a more specific example, one slot of 120 kHz is set as the reference interval (specific time interval) for BD / CCE reconfiguration for 480 kHz or 960 kHz.

[0115] Furthermore, a method for checking BD / CCE restrictions is proposed to apply Methods 1.2-1 and 1.2-2. If the slot-groups of all cells included in the CA are aligned (or are aligned with other time criteria, such as the maximum Y or Y_upper of the cells), the terminal determines and checks the BD / CCE restrictions within the aligned specific time interval. However, if all cells do not include the aligned specific time interval, the BD / CCE restrictions are determined or checked for only some of the cells that include the aligned specific time interval.

[0116] For example, in a situation where four cells of 480 kHz SCS are CA-enabled, the slot-groups of cell #1 and cell #2 are aligned, and the slot-groups of cell #3 and cell #4 are aligned. The slot length of the aligned slot-group of cell #1 and cell #2 is called slot-group 1, and the slot length of the aligned slot-group of cell #3 and cell #4 is called slot-group 2. If slot-group 1 and slot-group 2 are not aligned, the cell corresponding to slot-group 1 and the cell corresponding to slot-group 2 are considered to have separate pneumology, and separate BD / CCE limits are determined or checked. As another example, in a situation where four cells of 960 kHz SCS are CA-enabled, if X is 4 for three cells and X is 2 for the remaining cell, the three cells with X=4 include a specific aligned time interval, and therefore the BD / CCE limits are calculated for the three cells in common. The BD / CCE limits of the remaining cell with X=2 are calculated separately from the other three cells.

[0117] When applying Methods 1.2-1, 1.2-2, and 1.2-3, if the pneumology of the cells is different, BD / CCE reconfiguration and / or BD / CCE restriction calculations are performed separately. Also, when applying Methods 1.2-1, 1.2-2, and 1.2-3, even if the pneumology of the cells is the same, if X and / or Y for configuring multi-slot PDCCH monitoring are different, BD / CCE reconfiguration and / or BD / CCE restriction calculations are performed separately according to the configured (or reported) combination of X and / or Y.

[0118] After the BD / CCE limit is determined by the above method, the network and / or base station configures the PDCCH by configuring a search space so that the UE does not exceed the BD / CCE limit. Overbooking is permitted for USSs assigned to a primary cell or primary secondary cell. The UE does not perform BD or CCE that would exceed the BD / CCE limit by dropping. In this case, if the cell in which the USS should be dropped is a cell for multi-slot PDCCH monitoring and is not aligned in time with the cell for single-slot PDCCH monitoring that is CA-compatible (or corresponds to the reference SCS), the USS drop is performed based on a new slot-group interval aligned with the slot of the cell for single-slot PDCCH monitoring. The USS drop may also be performed based on an initially configured slot-group that is not aligned. In addition, the newly set slot group, i.e., the part of the newly set X slot that is not aligned with the existing slot group, is dropped with the highest priority in the USS drop.

[0119] 1.3. How to set default X and default Y

[0120] The X slot and Y slot (or symbol) for configuring multi-slot PDCCH monitoring are determined by configuration and / or report from the network or the terminal (UE). More specifically, the UE configures the X and / or Y values ​​by signaling such as RRC. The UE informs the network of its (operable or) preferred X and Y by a capability report before receiving signaling such as RRC. In this case, the configured or reported X and / or Y values ​​are the respective positions and sizes.

[0121] Before an RRC connection (or UE capability report), the UE performs multi-slot PDCCH monitoring operation assuming preset default X and / or default Y. The values ​​of default X and default Y are determined on a slot-by-slot basis.

[0122] (1) Basically, each of the X and Y values ​​is defined as a plurality of different values. The default X and Y values ​​used by the UE (before RRC connection / UE capability reporting) are defined as the maximum value of the plurality of X values ​​for X and the minimum value of the plurality of Y values ​​for Y. Alternatively, the default X and Y values ​​are defined as a combination of the maximum X value and the minimum Y value combined (on that X value and the UE capability). Alternatively, the default X and Y values ​​are defined as a combination of the minimum Y value and the maximum X value combined (on that Y value and the UE capability). Alternatively, the default X and Y values ​​are defined as the minimum value of the plurality of X values ​​and the minimum value of the plurality of Y values ​​for default Y. Alternatively, the default X and Y values ​​are defined as a combination of the minimum X value and the minimum Y value combined (on that X value and the UE capability). Alternatively, the default X and Y values ​​are defined as a combination of the minimum X value and the minimum Y value combined (on that X value and the UE capability). Alternatively, the default X and Y values ​​are defined as a combination of the minimum Y value and the minimum X value combined (on that Y value and the UE capability).

[0123] (2) More specifically, the terminal sets the default X for the 480 kHz SCS to X=4. The terminal also sets X to be aligned with the slot boundary of the 120 kHz SCS (or reference SCS). The terminal also sets the default Y for the 480 kHz SCS to Y=1 (1 in X). st slot) or Y=2(1 in X st and 2 nd slot) or Y = X / 2.

[0124] (3) More specifically, the terminal sets the default X for the 960 kHz SCS to X=8. The terminal also sets X to be aligned with the slot boundary of the 120 kHz (or reference SCS). The terminal also sets the default Y for the 480 kHz SCS to Y=1 (1 in X). st slot) or Y=2(1 in X st and 2 ndslot) or Y=4(1 in X st ~4 th slot) or Y = X / 2.

[0125] (4) If Y can be set as a slot and a symbol, the default Y is set in slot units.

[0126] Furthermore, depending on the index of the successfully received SSB, the UE determines the position of different X within a frame or half frame. For example, the default X is aligned with the slot boundary of the 120 kHz SCS. In this case, the slot index of the 120 kHz SCS aligned within one frame varies depending on the index of the successfully received SSB.

[0127] Specifically, since the position (e.g., within a frame) of CORESET#0 linked to the SSB may differ depending on each SSB index, the slot containing CORESET#0 is determined to be the start point of X and / or Y. Alternatively, even if the position of X is the same, the position of Y within the X slot may differ depending on the SSB index.

[0128] Specifically, (i) the multiplexing pattern between SSB and CORESET and (ii) the slot index (n0 for multiplexing pattern 1, or n for multiplexing pattern 2 / 3) that includes the Type0-PDCCH CSS (common search space) set to be monitored according to the SSB index. c Table 9 is an excerpt from Section 13 of the conventional 3GPP TS 38.213, and shows an example in which (i) a multiplexing pattern between SSB and CORESET, and (ii) an SSB index determine a slot index that includes a Type0-PDCCH CSS (common search space) set to be monitored.

[0129] When the multiplexing pattern between SSB and CORESET is pattern 1, the slot index n0 for monitoring the Type0-PDCCH CSS set according to the SSB index i is JPEG0007807530000021.jpg1093. Thus, the n0 slot defined for each SSB index i is determined as the start of X for each SSB index i. Alternatively, X is aligned with a slot boundary of a particular reference SCS (e.g., 120 kHz), and the n0 slot defined for each SSB index i is determined as the start of Y for each SSB index i.

[0130] [Table 9]

[0131] 1.4. Hashing Function Modification for Multi-Slot PDCCH Monitoring

[0132] In a conventional NR system, in relation to slot-by-slot PDCCH monitoring, the CCE index is determined as shown in Table 10. Table 10 is part of conventional 3GPP TS 38.213.

[0133] [Table 10]

[0134] JPEG0007807530000024.jpg31160

[0135] If X=4 is set for 480kHz SCS, A hashing operation for calculating a CCE index is performed in units of 4 slots (i.e., the same for every 4 consecutive slots) using JPEG0007807530000025.jpg10114. In the hashing operation, X means the number of consecutive slots in a slot-group, or the (minimum) distance / separation interval of a span in which PDCCH MO exists. X is a value that is predefined by the SCS or set by higher layer signaling such as RRC. X may be reported by the terminal as a UE capability.

[0136] In the hashing operation, multi-slot PDCCH monitoring is configured in units of slot-groups (consisting of X consecutive slots) and Y slots within a slot-group, or if PDCCH MO exists in only Y slots, then X or Y slots The CCE index is determined by matching the value of JPEG0007807530000026.jpg1182.

[0137] In the hashing operation, multi-slot PDCCH monitoring is configured in a predefined (X, Y) span (or span basis with X and / or Y changed to slot units) and Y slot (or symbol) units, or if PDCCH MO exists in only Y slots (or symbols), in X or Y slots (or symbols) The CCE index is determined by matching the value of JPEG0007807530000027.jpg1188.

[0138] 1.5. Method for determining (X, Y) combinations for multi-slot PDCCH monitoring

[0139] BD / CCE handling related to the operation of multi-slot PDCCH monitoring in a high frequency band (e.g., a frequency band above 52.6 GHz) and / or a high SCS (e.g., 480 kHz, 960 kHz) is performed in slot-group units. For example, for a serving cell and DL BWP, the maximum number of BDs (or the maximum number of PDCCH candidates to monitor and decode) and the maximum number of non-overlapped CCEs per SCS that a terminal (=UE) can use are defined in slot-group units. In addition, PDCCH-related procedures such as SS set configuration, SS allocation, PDCCH overbooking, and SS set dropping are performed in slot-group units.

[0140] The number of slots constituting a slot-group is defined as X. The number of consecutive slots in a slot-group in which a terminal monitors a PDCCH, in which an SS set is configured, or in which a monitoring occasion (MO) corresponding to a specific SS set is located is defined as Y.

[0141] For example, as shown in Figure 5, X=4 is defined for a 960 kHz SCS, and the first two slots in the X slot are defined as Y slots. For a specific SS set, PDCCH monitoring is performed only in the Y slot. Therefore, for a specific SS set, PDCCH MO is configured (or located) only in the Y slot. The specific SS set refers to, for example, but is not limited to, Type 1 CSS with dedicated RRC configuration and / or type 3 CSS and / or UE-specific SS.

[0142] In this case, the combination of (X, Y) takes on different values ​​depending on the SCS of the channel including the PDCCH (for example, the PDCCH). [Table 11] shows an example of the combination of (X, Y) for each SCS.

[0143] [Table 11]

[0144] The required (X, Y) and / or the selected (X, Y) are indicated and / or configured to the terminal (e.g., UE) by the base station (e.g., gNB). The terminal performs multi-slot PDCCH monitoring according to the configured (X, Y).

[0145] Alternatively, the terminal reports to the base station its preferred (or supportable / capable) combination (or combinations) among the possible (X, Y) combinations, and determines the (X, Y) combination for which multi-slot PDCCH monitoring operates using one of the methods in 1.5-1-(1) or 1.5-1-(2) below.

[0146] 1.5-1-(1) The terminal is explicitly instructed and / or configured with one of the supportable (X, Y) combinations (or supportable X values) by signaling such as RRC from the base station.

[0147] 1.5-1-(2) The terminal is instructed and / or configured with the MO location by SS set configuration, etc., instead of explicit signaling for another (X, Y) combination (or X value) from the base station. For example, the terminal assumes and / or infers (X, Y) set by the base station by SS set configuration, etc., and performs multi-slot PDCCH monitoring according to the result of the assumption and / or analogy.

[0148] Even for the same SCS, the combinations of (X, Y) that can be supported vary depending on the capabilities of each terminal. The terminal reports to the base station that a specific (X, Y) combination is possible through UE capability signaling. In this invention, the combination of (X, Y) reported by the terminal to the base station is denoted as (Xu, Yu). Also, the combination of (X, Y) configured in the terminal by the base station based on the reported combination of (Xu, Yu) is denoted as (Xg, Yg). Even if it is not explicitly configured by the base station, the reference (X, Y) combination for the base station's SS set configuration is denoted as (Xg, Yg). Alternatively, the combination of (X, Y) that is assumed to operate in the terminal from the base station's perspective due to the SS set configuration is denoted as (Xg, Yg).

[0149] The terminal expects the Xg value to be greater than or equal to Xu and / or the Yg value to be less than or equal to Yu. Alternatively, the terminal expects the minimum unit of some or all of the parameters for the SS set (e.g., periodicity and / or offset and / or duration) to be greater than Xu (or Xg), or the periodicity and / or offset values ​​to be set to multiples of Xu (or Xg). In the combinations of (Xg, Yg) set by the base station, Xg is not limited to one of Xu, and Yg is not limited to one of Yu.

[0150] For example, even if the terminal reports (8, 4) and (4, 1) as the combination of (Xu, Yu) for 960 kHz, the base station configures the SS set so that the combination of (8, 1) is derived by the terminal. The terminal operates in the expectation that the SS set configuration corresponding to (8, 1) will be configured (or the MO will be positioned according to the combination of (8, 1)).

[0151] The terminal reports to the base station that multiple (X, Y) combinations are available for a specific serving cell (or DL ​​BWP or SCS). For example, the terminal reports (Xu_1, Yu_1) and (Xu_2, Yu_2) to the base station. The terminal estimates the (X, Y) combination set by the base station (or actually applied to monitoring by the terminal) from the multiple (X, Y) combinations that can be supported (or reported by the terminal) according to the SS set configuration parameters configured for the serving cell (or DL ​​BWP).

[0152] The terminal reports a selective combination from the (X, Y) combinations in Table 11. If the SS set configuration received by the terminal does not match the reported (X, Y) combination, the terminal operates assuming that the base station has configured the required combination.

[0153] For example, assume that the terminal reports a selection combination (4, 1) for a specific cell (or DL ​​BWP) with 960 kHz SCS. If the period of the SS set configuration received by the terminal does not match (4, 1), the terminal determines the required combination (8, 1) as the (X, Y) combination to apply to the specific cell (or DL ​​BWP) and performs PDCCH monitoring.

[0154] Alternatively, if the configured MO pattern does not match the combination (4, 1), the terminal performs PDCCH monitoring based on the combination (8, 1). Thus, the terminal performs PDCCH monitoring based on a slot-group consisting of 8 slots.

[0155] Alternatively, the terminal reports a specific combination of the (X, Y) combinations that it can support to the base station (e.g., some of the combinations in Table 11), and if the SS set configuration matches that (X, Y) combination, it assumes that that (X, Y) combination is the combination configured by the base station and performs PDCCH monitoring operation.

[0156] Alternatively, the terminal reports a selected specific (X, Y) combination from among the supportable (X, Y) combinations to the base station. The reported combination is a part of the combinations in Table 11. Regardless of whether the terminal has reported a required (X, Y) combination, if the SS set configuration matches a specific (X, Y) combination, the terminal performs PDCCH monitoring operation assuming that the specific (X, Y) is the (X, Y) combination configured by the base station. For example, the terminal reports the required combination (X_1, Y_1) and the selected combination (X_2, Y_2) from among the combinations in Table 11 to the base station. The terminal performs PDCCH monitoring assuming that the combination that matches the SS set configuration (or MO pattern) is the combination configured by the base station. Alternatively, the terminal reports only the selected combination (X_2, Y_2) from among the combinations in Table 11 to the base station. The terminal performs PDCCH monitoring by assuming that the combination that matches the SS set configuration (or MO pattern) among the reported combinations and the combinations required for the SCS is the combination configured by the base station.

[0157] As another example, the terminal reports a specific number (=C) of combinations (X, Y) that it can support to the base station. For example, if C=2, (Xu_1, Yu_1) and (Xu_2, Yu_2) are reported. If the SS set configuration parameters confirmed by the terminal or the MO pattern configured by the base station match all of the reported C combinations, the terminal operates assuming that one (specific) combination from among the C combinations has been configured by the base station. Alternatively, if only D combinations out of the C combinations, which is a number smaller than C, match the SS set configuration parameters or the MO pattern configured by the base station, the terminal operates assuming one combination from among the D combinations. A method for selecting one combination is one of the three methods in 1.5-2.

[0158] 1.5-2-(1) The terminal operates assuming that the combination (max(Xu_1, Xu_2, ..., Xu_C), min(Yu_1, Yu_2, ..., Yu_C)) is the combination (X, Y) set by the base station.

[0159] For example, after a terminal reports two combinations (8, 1) and (4, 1) for 960 kHz, when determining the appropriate (X, Y) combination based on the MO pattern and / or SS set configuration, if neither (8, 1) nor (4, 1) violates the parameters of the MO pattern and / or SS set configuration, the terminal will operate assuming that (8, 1) is the (X, Y) combination set by the base station out of the two reported combinations.

[0160] As another example, Xg is determined to be the maximum value among the reported Xu's (i.e., max(Xu_1, Xu_2, ..., Xu_C)), and Y is determined to be the smallest Y that can be combined with that Xg.

[0161] As another example (assuming C=2, for example), when the base station checks the MO pattern (on the time axis) according to the SS set configured, if the MO pattern matches multiple (two in this case) combinations that the terminal can support, the terminal assumes that (Xu, Yu) is configured, where the maximum number of BC / CCEs among Xu_1 and Xu_2 corresponds to the Xu value that defines the number of BC / CCEs (or the maximum number of BC / CCEs among Yu_1 and Yu_2 corresponds to the Yu value that defines the number of BC / CCEs), and performs a series of operations (e.g., PDCCH-related procedures such as SS allocation, PDCCH overbooking, and SS (set) dropping) based on that combination. Although two combinations are illustrated, this example can be applied to combinations of two or more.

[0162] 1.5-2-(2) The terminal operates assuming that max(Xu_1, Xu_2, ..., Xu_C) is X set by the base station, and that Y that can be coupled to X is Y set by the base station.

[0163] For example, if the kth combination among the combinations reported by the terminal is the maximum value of Xu (i.e., Xu_k=max(Xu_1, Xu_2, ..., Xu_C)), the terminal operates assuming that (Xu_k, Yu_k) is the combination of (X, Y) set by the base station. If there is one combination with Xu_k among the C combinations, the terminal determines the combination to be used as (Xu_k, Yu_k). If there are two or more Ys corresponding to one Xu_k, the terminal estimates and / or determines the combination of (X, Y) set by the base station using the smallest Y among the Ys. For example, after the terminal reports two combinations, (8, 1) and (4, 1), if both (8, 1) and (4, 1) conform to the MO pattern, (8, 1), which corresponds to 8, the result of max(8, 4), becomes the combination of (X, Y) assumed by the terminal. As another example, after the terminal reports three combinations of (8, 1), (8, 4), and (4, 2), if all three combinations match the MO pattern, the X assumed by the terminal is set to 8, and Y=1, which is the minimum value of Y values ​​of (8, 1) and (8, 4), is selected. Finally, the terminal performs PDCCH monitoring operation assuming that (8, 1) is (X, Y) set by the base station.

[0164] As another example, assuming C=3, when checking the MO pattern (in the time domain) according to the SS set configured by the base station, if the MO pattern satisfies all three combinations (Xu_1, Yu_1), (Xu_2, Yu_2), and (Xu_3, Yu_3) that the terminal can support, the terminal assumes that the X value defined by the largest number of BC / CCEs among Xu_1, Xu_2, and Xu_3 is the X set by the base station, and if there is only one Y associated with the assumed X, it assumes this as the Y set by the base station. If there are multiple Ys associated with the assumed X, the terminal assumes a combination of (X, Y) set by the base station using the smallest Y among the multiple Ys and the assumed X, and performs a series of operations (e.g., PDCCH-related procedures such as SS allocation, PDCCH overbooking, and SS (set) dropping) based on that combination. Although three combinations are illustrated, this example can be similarly applied to multiple other combinations.

[0165] 1.5-2-(3) The terminal performs monitoring operations assuming max(Xu_1, Xu_2, ..., Xu_C) to be X set by the base station. That is, the terminal performs monitoring by estimating only X set by the base station. In this case, Y may be Y associated with X among (X, Y) reported by the terminal, Y associated with X among (X, Y) supportable for SCS, or Y associated with X among (X, Y) required for SCS. For example, when only the combinations in Table 11 are defined, Y is always assumed to be 1 regardless of SCS and X.

[0166] As another example, when the terminal checks the MO pattern (in the time domain) according to the SS set configured by the base station (for example, assuming C=3), if the MO pattern satisfies all three combinations (Xu_1, Yu_1), (Xu_2, Yu_2), and (Xu_3, Yu_3) that the terminal can support, the terminal operates by assuming that X, which is the value X defined by the largest number of BDs / CCEs among Xu_1, Xu_2, and Xu_3, is set by the base station. As described above, Y is determined to be one of the values ​​combined with X. The terminal performs a series of operations (e.g., PDCCH-related procedures such as SS allocation, PDCCH overbooking, and SS (set) dropping) based on the determined and / or estimated combination of (X, Y). Although three combinations are illustrated, this illustration can be similarly applied to other combinations.

[0167] On the other hand, the contents of the present invention are not limited to uplink and / or downlink signal transmission and reception. For example, the contents of the present invention can also be applied to direct communication between terminals. Furthermore, the base station in the present invention is a concept that includes not only a base station but also a relay node. For example, the operation of the base station in the present invention may be performed by the base station or by a relay node.

[0168] The above-mentioned example of the proposed method is also included as one of the methods of implementing the present invention, and therefore can be regarded as a kind of proposed method. In addition, the above-mentioned proposed methods may be implemented independently, or may be implemented in the form of a combination (or merging) of some of the proposed methods. Information regarding whether or not the above-mentioned proposed method is applied (or information regarding the rules of the proposed method) can be specified so that the base station notifies the terminal or the transmitting terminal notifies the receiving terminal by a predetermined signal (e.g., physical layer signaling or higher layer signaling).

[0169] Example

[0170] FIG. 6 is a flowchart illustrating a signal transmission and reception method according to an embodiment of the present invention.

[0171] Referring to FIG. 6, one embodiment of the present invention is performed by a terminal and includes a step of setting a combination of X and Y for monitoring a PDCCH in a serving cell (S601), and a step of monitoring a PDCCH based on the combination of X and Y on the serving cell (S603).

[0172] In addition to the operations of FIG. 6, one or more of the operations described in Section 1 may also be performed.

[0173] As mentioned above, X indicates the number of consecutive slots included in a slot-group. Referring to Figure 5, slot-groups are repeated consecutively without overlapping. Y indicates the number of consecutive slots within one slot-group. Since slot-groups are repeated consecutively without overlapping, Y slots are also repeated at the same position within X slots.

[0174] Referring to Section 1.3, before reporting the capability of the terminal, the terminal sets default X and default Y to monitor the PDCCH. In other words, if information on the PDCCH monitoring capability for the serving cell is not provided, the terminal sets default X and default Y to monitor the PDCCH.

[0175] Referring to (2) in Section 1.3, the default X for 480 kHz SCS is set to X=4 and the default Y is set to Y=1. Referring to (3) in Section 1.3, the default X for 960 kHz is set to X=8 and the default Y is set to Y=1.

[0176] The SCS is configured for each serving cell. Therefore, referring to Section 1.3, if information about the PDCCH monitoring capability of the serving cell is not provided and a 480 kHz SCS is configured for the serving cell, a combination of X=4 and Y=1 is used for PDCCH monitoring. Also, if information about the PDCCH monitoring capability of the serving cell is not provided and a 960 kHz SCS is configured for the serving cell, a combination of X=8 and Y=1 is used for PDCCH monitoring.

[0177] Referring to (1) of Section 1.3, in (2) of Section 1.3, the default X is set to X=4 and the default Y is set to Y=1 for the 480 kHz SCS because 4 is the maximum value of X used in the 480 kHz SCS and 1 is the minimum value of Y used in the 480 kHz SCS. Also, in (3) of Section 1.3, the default X is set to 8 and the default Y is set to 1 for the 960 kHz SCS because 8 is the maximum value of X used in the 960 kHz SCS and 1 is the minimum value of Y used in the 960 kHz SCS.

[0178] Therefore, if information about the PDCCH monitoring capability for the serving cell is not provided and a specific SCS above a threshold is configured for the serving cell, a combination is used where X is the maximum value used for the specific SCS and Y is the minimum value used for the specific SCS. The method according to the present invention is related to the high frequency band where a high SCS above 480 kHz is used, and the threshold is 480 kHz.

[0179] Further, referring to Section 1.5, the terminal reports multiple combinations of X and Y to the base station as terminal capabilities and uses one of the multiple combinations according to the configuration of the search space set. If the configuration of the search space set corresponds to multiple D combinations less than or equal to C among the C combinations, the terminal selects one of the D combinations by one of the three methods in 1.5-2 and monitors the PDCCH.

[0180] It will be readily apparent to those skilled in the art that the operations in Section 1.3 are performed when information about the PDCCH monitoring capability for the serving cell is not provided, and the operations in Section 1.5 are performed when information about the PDCCH monitoring capability for the serving cell is provided, and therefore these are compatible and combinable embodiments.

[0181] For example, when the terminal uses the method 1.5-2-(3), the terminal selects an X value that defines the maximum number of BDs / CCEs among the D combinations and monitors the PDCCH, and Y is determined to be a specific value combined with the selected X.

[0182] As described above, the number of BDs is the maximum number of PDCCH candidates monitored in a serving cell, and the number of CCEs is the maximum number of non-overlapping CCEs in a serving cell. Meanwhile, when slot groups are configured, the BD / CCE limit is defined in units of multiple slots, so the number of BDs / CCEs is defined in units of combinations of X and Y. Also, in 1.5-2-(3), the number of BDs / CCEs is defined for the X value (in a group of X slots), so the number of BDs is the maximum number of PDCCH candidates monitored in a group of X slots per combination of X and Y per serving cell, and the number of CCEs is the maximum number of non-overlapped CCEs in a group of X slots per combination of X and Y per serving cell. Therefore, the number of BDs / CCEs changes depending on the X value. The terminal selects X associated with the maximum number of BDs / CCEs from among the D combinations that match the search space set configuration, and selects Y that belongs to the same combination as X.

[0183] In summary, based on the information on the PDCCH monitoring capability being provided in association with multiple combinations of X and Y and the search space set configuration being associated with at least two combinations of the multiple combinations of X and Y, the terminal monitors the PDCCH with a specific combination of X and Y associated with the largest M and C among the at least two combinations, where M denotes the number of BDs and C denotes the number of CCEs.

[0184] Furthermore, referring to Section 1.2, when N_cap < N_dl, that is, when the number of serving cells set for the terminal exceeds the number of cells for which the terminal performs PDCCH monitoring, the number of BD / CCE is reset. For example, referring to 1.2-1, when the positions and sizes of a plurality of serving cells set for the terminal are the same, BD / CCE reset is performed in X slot units.

[0185] After the terminal determines the combination of X and Y, the number of blind decoding times and the number of CCEs to be searched are determined according to the determined X and Y. Sections 1.1 and 1.2 are for determining the number of blind decoding times and the number of CCEs, and it can be easily understood by those skilled in the art that they can be combined with other embodiments.

[0186] When BD is reset, the number of monitored PDCCH candidates is reset. Therefore, based on the fact that the number of a plurality of serving cells exceeds the number of cells for which the terminal can perform PDCCH monitoring, the number of PDCCH candidates is reset in X slot units for the plurality of serving cells.

[0187] Also, when CCE is reset, the number of non-overlapping CCEs is reset. Therefore, based on the fact that the number of a plurality of serving cells exceeds the number of cells for which the terminal can perform PDCCH monitoring, the number of non-overlapping CCEs is reset in X slot units for the plurality of serving cells.

[0188] By the operation of Section 1.3, when the default X is set for the terminal, or by Section 1.5, when a specific X related to the maximum M and C is set, the default X and / or the specific X are for one serving cell, and one serving cell for which the default X and / or the specific X is set and a plurality of serving cells CAed with it are set together. When the default X and / or the specific X are set the same for the plurality of serving cells, the operation of 1.2- is performed.

[0189] In summary, when multiple serving cells for PDCCH monitoring are configured, including a serving cell for which a default X and / or a specific X is configured, and the multiple serving cells include the same X slots as the serving cell for which the default X and / or the specific X is configured, the number of PDCCH candidates to be monitored in the X slots in the multiple serving cells is reconfigured based on the fact that the number of the multiple serving cells exceeds the maximum number of cells for which the terminal can monitor the PDCCH.

[0190] Furthermore, when multiple serving cells for PDCCH monitoring are configured, including a serving cell for which a default X and / or a specific X is configured, and the multiple serving cells include the same X slots as the serving cell for which the default X and / or a specific X is configured, the number of non-overlapping CCEs in the X slots in the multiple serving cells is reset based on the fact that the number of the multiple serving cells exceeds the maximum number of cells for which the terminal can monitor the PDCCH.

[0191] The operation in Section 1.4 is for determining a hashing function for PDCCH monitoring after the combination of X and Y is determined, and it can be easily understood by those skilled in the art that it can be combined with other embodiments.

[0192] In addition to the operations described with respect to FIG. 6, one or more of the operations described with respect to FIGS. 1 to 5 and / or the operations described in Section 1 may be performed in combination.

[0193] An example of a communication system to which the present invention is applied

[0194] Without being limited thereto, the various descriptions, functions, procedures, suggestions, methods and / or flow charts of the present invention disclosed in this specification may be applied to various fields requiring wireless communication / connectivity between devices (e.g., 5G).

[0195] Hereinafter, a more detailed description will be given with reference to the drawings. In the following drawings / description, the same reference numerals indicate the same or corresponding hardware blocks, software blocks or function blocks unless otherwise specified.

[0196] FIG. 7 illustrates a communication system 1 to which the present invention is applied.

[0197] Referring to FIG. 7, a communication system 1 applicable to the present invention includes wireless devices, base stations, and a network. Here, the wireless devices refer to devices that communicate using wireless connection technologies (e.g., 5G NR, LTE), and are also referred to as communication / wireless / 5G devices. The wireless devices include, but are not limited to, a robot 100a, vehicles 100b-1 and 100b-2, an XR (eXtended Reality) device 100c, a handheld device 100d, a home appliance 100e, an IoT (Internet of Things) device 100f, and an AI server / device 400. For example, the vehicles include vehicles equipped with wireless communication capabilities, autonomous vehicles, vehicles capable of vehicle-to-vehicle communication, and the like. Here, the vehicles include unmanned aerial vehicles (UAVs) (e.g., drones). XR devices include Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR) devices, and are embodied in the form of Head-Mounted Devices (HMDs), Head-Up Displays (HUDs) mounted on vehicles, TVs, smartphones, computers, wearable devices, home appliances, digital billboards, vehicles, robots, etc. Mobile devices include smartphones, smart pads, wearable devices (e.g., smart watches, smart glasses), computers (e.g., laptops, etc.), etc. Home appliances include TVs, refrigerators, washing machines, etc. IoT devices include sensors, smart meters, etc. For example, base stations and networks may also be embodied as wireless devices, and a specific wireless device 200a may operate as a base station / network node for other wireless devices.

[0198] The wireless devices 100a to 100f are connected to a network 300 via a base station 200. The wireless devices 100a to 100f are equipped with AI (Artificial Intelligence) technology, and are connected to an AI server 400 via the network 300. The network 300 is configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. The wireless devices 100a to 100f can communicate with each other via the 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). IoT devices (e.g., sensors) can also communicate directly with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0199] Wireless communication / connections 150a, 150b, and 150c are performed between the wireless devices 100a to 100f and the base stations 200, and between the base stations 200. Here, the wireless communication / connections are performed using various wireless connection technologies such as uplink / downlink communication 150a and sidelink communication 150b (or D2D communication), and communication between base stations 150c (e.g., relay, Integrated Access Backhaul (IAB)) (e.g., 5G NR). Through the wireless communication / connections 150a, 150b, and 150c, the wireless devices and the base stations, and the base stations, can transmit / receive wireless signals to / from each other. For example, the wireless communication / connections 150a, 150b, and 150c can transmit / receive signals via various physical channels. To this end, according to various proposals of the present invention, any one of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and resource allocation processes is performed.

[0200] Examples of wireless devices to which the present invention is applied

[0201] FIG. 8 illustrates a wireless device to which the present invention can be applied.

[0202] 8, a first wireless device 100 and a second wireless device 200 transmit and receive wireless signals using various wireless access technologies (e.g., LTE, NR), where {first wireless device 100, second wireless device 200} corresponds to {wireless device 100x, base station 200} and / or {wireless device 100x, wireless device 100x} in FIG.

[0203] 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 is configured to control the memory 104 and / or the transceiver 106 to implement the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. For example, the processor 102 processes information in the memory 104 to generate first information / signals and then transmits a wireless signal including the first information / signals via the transceiver 106. The processor 102 also receives a wireless signal including second information / signals via the transceiver 106 and then stores information obtained from signal processing of the second information / signals in the memory 104. The memory 104 is coupled 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 implementing the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. Here, the processor 102 and memory 104 are part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver 106 is coupled to the processor 102 and transmits and / or receives wireless signals via one or more antennas 108. The transceiver 106 includes a transmitter and / or a receiver. The transceiver 106 may also be referred to as an RF (radio frequency) unit. In the present invention, a wireless device may also refer to a communication modem / circuit / chip.

[0204] 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 is configured to control the memory 204 and / or the transceiver 206 to implement the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. For example, the processor 202 processes information in the memory 204 to generate third information / signal, and then transmits a wireless signal including the third information / signal via the transceiver 206. The processor 202 also receives a wireless signal including a fourth information / signal via the transceiver 206, and then stores information obtained from signal processing of the fourth information / signal in the memory 204. The memory 204 is coupled to the processor 202 and stores various information related to the operation of the processor 202. For example, the memory 204 stores software code including instructions for performing some or all of the processes controlled by the processor 202 or for implementing the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. Here, the processor 202 and memory 204 are part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver 206 is coupled to the processor 202 and transmits and / or receives wireless signals via one or more antennas 208. The transceiver 206 includes a transmitter and / or a receiver. The transceiver 206 may also be referred to as an RF unit. In the present invention, a wireless device may also refer to a communication modem / circuit / chip.

[0205] The hardware elements of the wireless devices 100, 200 are described in more detail below. Without limitation, one or more protocol layers may be implemented by one or more processors 102, 202. For example, one or more processors 102, 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). The one or more processors 102, 202 may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. The one or more processors 102, 202 may generate messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. The one or more processors 102, 202 generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the functions, procedures, suggestions, and / or methods disclosed herein and provide them to the one or more transceivers 106, 206. The one or more processors 102, 202 receive signals (e.g., baseband signals) from the one or more transceivers 106, 206 and derive the PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein.

[0206] The one or more processors 102, 202 may also be referred to as a controller, microcontroller, microprocessor, or microcomputer. The one or more processors 102, 202 may be implemented using hardware, firmware, software, or a combination thereof. For example, the one or more processors 102, 202 may include one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs). The descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein may be implemented using firmware or software, and the firmware or software may be embodied to include modules, procedures, functions, etc. Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein may be included in the one or more processors 102, 202 or may be stored in one or more memories 104, 204 and executed by the one or more processors 102, 202. The descriptions, functions, procedures, suggestions, methods and / or flow charts disclosed in this specification may be embodied using firmware or software in the form of code, instructions and / or sets of instructions.

[0207] One or more memories 104, 204 may be coupled to one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, code, instructions, and / or commands. The one or more memories 104, 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories 104, 204 may be located internal and / or external to the one or more processors 102, 202. Additionally, the one or more memories 104, 204 may be coupled to the one or more processors 102, 202 via various techniques, such as wired or wireless connections.

[0208] One or more transceivers 106, 206 can transmit user data, control information, wireless signals / channels, etc., as referenced in the methods and / or flowcharts herein to one or more other devices. One or more transceivers 106, 206 can receive user data, control information, wireless signals / channels, etc., as referenced in the descriptions, functions, procedures, suggestions, methods and / or flowcharts herein from one or more other devices. For example, one or more transceivers 106, 206 can be coupled 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. Furthermore, one or more transceivers 106, 206 are coupled to one or more antennas 108, 208, and are configured to transmit and receive user data, control information, radio signals / channels, etc., as referred to in the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein via the one or more antennas 108, 208. In this specification, one or more antennas may refer to multiple physical antennas or multiple logical antennas (e.g., antenna ports). The one or more transceivers 106, 206 convert the received user data, control information, radio signals / channels, etc., from RF band signals to baseband signals for processing by one or more processors 102, 202. The one or more transceivers 106, 206 convert the user data, control information, radio signals / channels, etc., processed by one or more processors 102, 202, from baseband signals to RF band signals. For this purpose, the one or more transceivers 106, 206 include an (analog) oscillator and / or a filter.

[0209] Examples of use of wireless devices to which this invention is applied

[0210] 9 shows another example of a wireless device to which the present invention is applied. The wireless device may be implemented in various forms depending on the use case / service (see FIG. 7).

[0211] 9, wireless devices 100 and 200 correspond to the wireless devices 100 and 200 of FIG. 8 and are composed of various elements, components, 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 an additional element 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. 8. For example, the transceiver 114 includes one or more transceivers 106 and 206 and / or one or more antennas 108 and 208 in FIG. 8. The control unit 120 is electrically coupled to the communication unit 110, the memory unit 130, and the additional element 140 and controls the overall operation of the wireless device. For example, the control unit 120 controls the electrical / mechanical operations of the wireless device based on the programs / codes / instructions / information stored in the memory unit 130. The control unit 120 also transmits the information stored in the memory unit 130 to an external device (e.g., another communication device) via the communication unit 110 via a wireless / wired interface, or stores information received from an external device (e.g., another communication device) via the communication unit 110 via a wireless / wired interface in the memory unit 130.

[0212] The additional element 140 may be configured in various ways depending on the type of wireless device. For example, the additional element 140 may include any one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computer unit. Wireless devices may be embodied in the form of, but are not limited to, a robot (FIG. 7, 100a), a vehicle (FIG. 7, 100b-1, 100b-2), an XR device (FIG. 7, 100c), a mobile device (FIG. 7, 100d), a home appliance (FIG. 7, 100e), an IoT device (FIG. 7, 100f), a digital broadcasting 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. 7, 400), a base station (FIG. 7, 200), a network node, etc. Wireless devices may be mobile or fixed depending on the use case / service.

[0213] In FIG. 9, the various elements, components, units / sections and / or modules in the wireless devices 100, 200 are all connected to each other by wired interfaces, or at least some are connected wirelessly by a communication section 110. For example, in the wireless devices 100 and 200, the control unit 120 and the communication unit 110 are connected by wire, and the control unit 120 and the first unit (e.g., 130, 140) are connected wirelessly via the communication unit 110. Furthermore, each element, component, unit / part and / or module in the wireless devices 100 and 200 further includes one or more elements. For example, the control unit 120 is configured with a set of one or more processors. For example, the control unit 120 is configured with a set of a communication control processor, an application processor, an ECU (Electronic Control Unit), a graphics processor, a memory control processor, etc. As another example, the memory unit 130 is configured with 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.

[0214] Examples of vehicles or autonomous vehicles to which the present invention is applied

[0215] 10 is a diagram illustrating an example of a vehicle or an autonomous vehicle to which the present invention is applied. The vehicle or the autonomous vehicle may be embodied as a mobile robot, a car, a train, an aerial vehicle (AV), a ship, etc.

[0216] 10, a vehicle or autonomous vehicle 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 is configured as part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 in FIG. 9, respectively.

[0217] The communication unit 110 transmits and receives signals (e.g., data, control signals, etc.) to and from external devices such as other vehicles, base stations (e.g., base stations, roadside units, etc.), and servers. The control unit 120 controls elements of the vehicle or autonomous vehicle 100 to perform various operations. The control unit 120 includes an ECU (Electronic Control Unit). The driving unit 140a causes the vehicle or autonomous vehicle 100 to move on the ground. The driving unit 140a includes an engine, a motor, a powertrain, wheels, brakes, a steering device, etc. The power supply unit 140b supplies power to the vehicle or autonomous vehicle 100 and includes wired / wireless charging circuits, a battery, etc. The sensor unit 140c can obtain vehicle status, 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 detection sensor, a heading sensor, a position module, a vehicle forward / reverse 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 technology for maintaining a lane while driving, technology for automatically adjusting speed such as adaptive cruise control, technology for automatically driving along a predetermined route, technology for automatically setting a route and driving when a destination is set, etc.

[0218] For 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 driving plan based on the obtained data. The control unit 120 controls the driving unit 140a (e.g., adjusting speed / direction) so that the vehicle or autonomous vehicle 100 moves along the autonomous driving route according to the driving plan. The communication unit 110 aperiodically obtains the latest traffic information data from an external server during autonomous driving and also obtains surrounding traffic information data from surrounding vehicles. In addition, the sensor unit 140c obtains vehicle status and surrounding environment information during autonomous driving. The autonomous driving unit 140d updates the autonomous driving route and driving plan based on the newly obtained data / information. The communication unit 110 transmits information regarding the vehicle position, autonomous driving route, driving plan, etc. to an external server. The external server can predict traffic information data using AI technology based on information collected from the vehicle or autonomous vehicle and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0219] It is obvious to those skilled in the art that the present invention can be embodied in other specific forms without departing from the characteristics of the present invention. Therefore, the above detailed description should not be construed as limiting in all respects, but should be considered as illustrative. The scope of the present invention should be determined by 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]

[0220] As described above, the present invention can be applied to a variety of wireless communication systems.

Claims

1. A method for monitoring control signals by a user equipment (UE) in a wireless communication system, comprising: configuring a combination of X and Y for monitoring a physical downlink control channel (PDCCH) in a serving cell, X is the number of consecutive slots in the slot group, The plurality of slot groups are non-overlapping and are repeated consecutively; Y is the number of consecutive slots within the X slots; monitoring the PDCCH in the serving cell based on the combination of X and Y; (i) information about PDCCH monitoring capability for the serving cell is not provided, and (ii) a subcarrier spacing (SCS) of 480 kHz is configured for the serving cell, a combination of X=4 and Y=1 is used; A combination of X=8 and Y=1 is used based on the following: (i) the information regarding the PDCCH monitoring capability for the serving cell is not provided; and (ii) an SCS of 960 kHz is configured for the serving cell; A plurality of serving cells including the serving cell are configured for the monitoring of the PDCCH, and the plurality of serving cells include X slots identical to the serving cell along with Y slots that are different from the serving cell; A method in which the number of PDCCH candidates monitored within the X slots in the plurality of serving cells is reset based on the number of the plurality of serving cells being greater than the maximum number of cells for which the UE can monitor the PDCCH.

2. 2. The method of claim 1, wherein, based on (i) the information regarding the PDCCH monitoring capability for the serving cell is not provided, and (ii) a specific SCS above a threshold is configured for the serving cell, the combination of X and Y is configured such that X has a maximum value usable for the specific SCS and Y has a minimum value usable for the specific SCS.

3. (i) the information regarding the PDCCH monitoring capability is provided in association with a plurality of combinations of X and Y; and (ii) a search space set configuration is associated with at least two combinations of X and Y among the plurality of combinations of X and Y. Based on this, the PDCCH is monitored based on a particular combination of X and Y associated with a maximum value of M and C among the at least two combinations; M denotes the maximum number of PDCCH candidates monitored in a group of X slots (i) for each combination of X and Y, and (ii) for each serving cell; 2. The method of claim 1, wherein C denotes the maximum number of non-overlapping control channel elements (CCEs) in the group of X slots (i) for each combination of X and Y, and (ii) for each serving cell.

4. A plurality of serving cells including the serving cell are configured for the monitoring of the PDCCH, and the plurality of serving cells include the same X slots as the serving cell; 2. The method of claim 1, wherein the number of non-overlapping control channel elements (CCEs) monitored within the X slots in the plurality of serving cells is reset based on the number of the plurality of serving cells being greater than a maximum number of cells for which the UE can monitor the PDCCH.

5. 1. A user equipment (UE) configured to monitor control signals in a wireless communication system, comprising: at least one transceiver; at least one processor; operatively coupled to the at least one processor, and when executed, causing the at least one processor to: Configuring a combination of X and Y for monitoring a physical downlink control channel (PDCCH) in a serving cell, X is the number of consecutive slots in the slot group, The plurality of slot groups are non-overlapping and are repeated consecutively; Y is the number of consecutive slots within X slots; and and monitoring the PDCCH in the serving cell based on the combination of X and Y; (i) information about PDCCH monitoring capability for the serving cell is not provided, and (ii) a subcarrier spacing (SCS) of 480 kHz is configured for the serving cell, a combination of X=4 and Y=1 is used; A combination of X=8 and Y=1 is used based on the following: (i) the information regarding the PDCCH monitoring capability for the serving cell is not provided; and (ii) an SCS of 960 kHz is configured for the serving cell; A plurality of serving cells including the serving cell are configured for the monitoring of the PDCCH, and the plurality of serving cells include X slots identical to the serving cell along with Y slots that are different from the serving cell; A UE in which the number of PDCCH candidates to be monitored within the X slots in the plurality of serving cells is reset based on the number of the plurality of serving cells being greater than the maximum number of cells for which the UE can monitor the PDCCH.

6. 6. The UE of claim 5, wherein, based on (i) the information regarding the PDCCH monitoring capability for the serving cell is not provided, and (ii) a specific SCS above a threshold is configured for the serving cell, the combination of X and Y is configured such that X has a maximum value usable for the specific SCS and Y has a minimum value usable for the specific SCS.

7. (i) the information regarding the PDCCH monitoring capability is provided in association with a plurality of combinations of X and Y; and (ii) a search space set configuration is associated with at least two combinations of X and Y among the plurality of combinations of X and Y. Based on this, the PDCCH is monitored based on a particular combination of X and Y associated with a maximum value of M and C among the at least two combinations; M denotes the maximum number of PDCCH candidates monitored in a group of X slots (i) for each combination of X and Y, and (ii) for each serving cell; 6. The UE of claim 5, wherein C denotes a maximum number of non-overlapping control channel elements (CCEs) in the group of X slots (i) for each combination of X and Y, and (ii) for each serving cell.

8. A plurality of serving cells including the serving cell are configured for the monitoring of the PDCCH, and the plurality of serving cells include the same X slots as the serving cell; 6. The UE according to claim 5, wherein the number of non-overlapping control channel elements (CCEs) monitored within the X slots in the plurality of serving cells is reset based on the number of the plurality of serving cells being greater than a maximum number of cells for which the UE can monitor the PDCCH.

9. An apparatus for a user equipment (UE), comprising: at least one processor; operatively coupled to the at least one processor, and when executed, causing the at least one processor to: Configuring a combination of X and Y for monitoring a physical downlink control channel (PDCCH) in a serving cell, X is the number of consecutive slots in the slot group, The plurality of slot groups are non-overlapping and are repeated consecutively; Y is the number of consecutive slots within X slots; and and monitoring the PDCCH in the serving cell based on the combination of X and Y; (i) information about PDCCH monitoring capability for the serving cell is not provided, and (ii) a subcarrier spacing (SCS) of 480 kHz is configured for the serving cell, a combination of X=4 and Y=1 is used; A combination of X=8 and Y=1 is used based on the following: (i) the information regarding the PDCCH monitoring capability for the serving cell is not provided; and (ii) an SCS of 960 kHz is configured for the serving cell; A plurality of serving cells including the serving cell are configured for the monitoring of the PDCCH, and the plurality of serving cells include X slots identical to the serving cell along with Y slots that are different from the serving cell; The apparatus, wherein the number of PDCCH candidates to be monitored within the X slots in the plurality of serving cells is reset based on the number of the plurality of serving cells being greater than a maximum number of cells for which the UE can monitor the PDCCH.

10. 10. The apparatus of claim 9, wherein, based on (i) the information regarding the PDCCH monitoring capability for the serving cell is not provided, and (ii) a particular SCS above a threshold is configured for the serving cell, the combination of X and Y is configured such that X has a maximum value usable for the particular SCS and Y has a minimum value usable for the particular SCS.

11. (i) the information regarding the PDCCH monitoring capability is provided in association with a plurality of combinations of X and Y; and (ii) a search space set configuration is associated with at least two combinations of X and Y among the plurality of combinations of X and Y. Based on this, the PDCCH is monitored based on a particular combination of X and Y associated with a maximum value of M and C among the at least two combinations; M denotes the maximum number of PDCCH candidates monitored in a group of X slots (i) for each combination of X and Y, and (ii) for each serving cell; 10. The apparatus of claim 9, wherein C denotes a maximum number of non-overlapping control channel elements (CCEs) in the group of X slots (i) for each combination of X and Y, and (ii) for each serving cell.

12. A plurality of serving cells including the serving cell are configured for the monitoring of the PDCCH, and the plurality of serving cells include the same X slots as the serving cell; 10. The apparatus of claim 9, wherein a number of non-overlapping control channel elements (CCEs) monitored within the X slots in the plurality of serving cells is reset based on a number of the plurality of serving cells that is greater than a maximum number of cells for which the UE can monitor the PDCCH.

13. At least one processor Configuring a combination of X and Y for monitoring a physical downlink control channel (PDCCH) in a serving cell, X is the number of consecutive slots in the slot group, The plurality of slot groups are non-overlapping and are repeated consecutively; Y is the number of consecutive slots within X slots; and and monitoring the PDCCH at the serving cell based on the combination of X and Y; (i) information about PDCCH monitoring capability for the serving cell is not provided, and (ii) a subcarrier spacing (SCS) of 480 kHz is configured for the serving cell, a combination of X=4 and Y=1 is used; A combination of X=8 and Y=1 is used based on the following: (i) the information regarding the PDCCH monitoring capability for the serving cell is not provided; and (ii) an SCS of 960 kHz is configured for the serving cell; A plurality of serving cells including the serving cell are configured for the monitoring of the PDCCH, and the plurality of serving cells include X slots identical to the serving cell along with Y slots that are different from the serving cell; A storage medium in which the number of PDCCH candidates monitored within the X slots in the plurality of serving cells is reset based on the number of the plurality of serving cells that is greater than the maximum number of cells that a UE (user equipment) can monitor the PDCCH.

14. 14. The storage medium of claim 13, wherein, based on (i) the information regarding the PDCCH monitoring capability for the serving cell is not provided, and (ii) a specific SCS above a threshold is configured for the serving cell, the combination of X and Y is configured such that X has a maximum value usable for the specific SCS and Y has a minimum value usable for the specific SCS.

15. (i) the information regarding the PDCCH monitoring capability is provided in association with a plurality of combinations of X and Y; and (ii) a search space set configuration is associated with at least two combinations of X and Y among the plurality of combinations of X and Y. Based on this, the PDCCH is monitored based on a particular combination of X and Y associated with a maximum value of M and C among the at least two combinations; M denotes the maximum number of PDCCH candidates monitored in a group of X slots (i) for each combination of X and Y, and (ii) for each serving cell; 14. The storage medium of claim 13, wherein C denotes a maximum number of non-overlapping control channel elements (CCEs) in the group of X slots (i) for each combination of X and Y (ii) for each serving cell.

16. A plurality of serving cells including the serving cell are configured for the monitoring of the PDCCH, and the plurality of serving cells include the same X slots as the serving cell; The storage medium of claim 13, wherein the number of non-overlapping control channel elements (CCEs) monitored within the X slots in the plurality of serving cells is reset based on the number of the plurality of serving cells being greater than a maximum number of cells for which the UE can monitor the PDCCH.

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