Method, terminal, device and storage medium for monitoring a control channel, and base station for transmitting a control channel

Abstract

The method and apparatus for monitoring signals in a wireless communication system according to the present invention performs PDCCH monitoring based on a configuration for a search space set. The PDCCH monitoring is performed on a slot-group basis and is performed only within a predetermined number of consecutive slots within a period given by a period and an offset. If a parameter for duration indicating the number of possible consecutive slots of the search space is absent from the configuration, the predetermined number is determined based on the size of the slot-group configured for the search space set.

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. In general, wireless communication systems are multiple access systems capable of supporting communication with multiple users by sharing available system resources (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, single carrier frequency division multiple access (SC-FDMA) systems, etc. Summary of the Invention [Problem to be solved by the invention]

[0003] The technical problem to be solved by the present invention is to provide a control channel monitoring method and an apparatus therefor for efficiently monitoring a control channel in a wireless communication system, and a method and an apparatus therefor for transmitting a control channel.

[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 control channel monitoring in a wireless communication system.

[0006] In another aspect of the present invention, there is provided a terminal for monitoring a control channel in a wireless communication system, the terminal including at least one transceiver, at least one processor, and at least one computer memory operatively connected to the at least one processor and which, when executed, causes the at least one processor to perform operations.

[0007] In yet another aspect of the present invention, there is provided an apparatus for a terminal, the apparatus including at least one processor and at least one computer memory operatively connected to the at least one processor and configured to, when executed, cause the at least one processor to perform operations.

[0008] In yet another aspect of the present invention, a computer-readable non-transitory storage medium is provided that contains at least one computer program for causing at least one processor to perform operations.

[0009] In yet another aspect of the present invention, a method for a base station transmitting a control channel in a wireless communication system is provided.

[0010] In yet another aspect of the present invention, a base station for transmitting a control channel in a wireless communication system is provided.

[0011] The method in the terminal or the operations performed by execution of instructions stored in at least one memory or storage medium of the terminal or the device for the terminal include receiving a search space configuration for a search space set for a downlink (DL) frequency band part (BWP) of a cell, and performing physical downlink control channel (PDCCH) monitoring for the search space set on the DL BWP based on the search space configuration. The PDCCH monitoring for the search space set includes (n f *N frame slot +n s、f -o s )mod k s =0, number n f Number n in the frame s、f Starting from the slot where T s in at least one slot in each of one or more consecutive slot-groups, s is the PDCCH monitoring periodicity, and s is the PDCCH monitoring offset, and N frame slot is the number of slots per frame. The search space setting is determined by: (i) the PDCCH monitoring period k s and the PDCCH monitoring offset o s and (ii) a second parameter regarding which slots within a slot-group are configured for the PDCCH monitoring, the second parameter being a bitmap of length L. Based on the presence of a third parameter regarding the number of possible consecutive slots of the search space set in the search space configuration, T s is based on the third parameter. Based on the absence of the third parameter in the search space setting, T sis equal to L, where L is the size of the slot-group configured for the PDCCH monitoring.

[0012] The method in the base station or the operations performed by execution of instructions stored in at least one memory or storage medium of the base station or the device for the base station include transmitting a search space configuration for a search space set for a downlink (DL) frequency band part (BWP) of a cell, and performing a physical downlink control channel (PDCCH) transmission based on the search space configuration on the DL BWP. The PDCCH transmission based on the search space configuration includes (n f *N frame slot +n s、f -o s )mod k s =0, number n f Number n in the frame s、f Starting from the slot where T s in at least one slot in each of one or more consecutive slot-groups, s is the PDCCH monitoring periodicity, and s is the PDCCH monitoring offset, and N frame slot is the number of slots per frame. The search space setting is determined by: (i) the PDCCH monitoring period k s and the PDCCH monitoring offset o s and (ii) a second parameter regarding which slots within a slot-group are configured for PDCCH monitoring, the second parameter being a bitmap of length L. Based on the presence of a third parameter regarding the number of possible consecutive slots of the search space in the search space configuration, T sis based on the third parameter. Based on the absence of the third parameter in the search space setting, T s is equal to L, where L is the size of the slot-group configured for the PDCCH monitoring.

[0013] The method in the terminal or the operations performed by execution of instructions stored in at least one memory or storage medium of the terminal or the device for the terminal include operations numbered n s、f Among the ks consecutive slots starting from the slot where T s The next k after consecutive slots s -T s This includes not performing the PDCCH monitoring on the search space set for the consecutive slots.

[0014] The method in the base station or the operations performed by instructions stored in at least one memory or storage medium of the base station or the device for the base station include number n s、f Starting from the slot where s Of the consecutive slots, s The next k after consecutive slots s -T s This includes not transmitting PDCCH based on the search space configuration in these consecutive slots.

[0015] In each aspect of the present invention, the PDCCH monitoring or the PDCCH transmission based on the search space configuration is performed based on a subcarrier spacing (SCS) of 480 kHz or a SCS of 960 kHz.

[0016] In each embodiment of the present invention, (n f *N frame slot +n s、f -o s )mod k s =0, number n s、f The slot where is the first slot in the one or more consecutive slot-groups.

[0017] In each aspect of the invention, the third parameter is set to a multiple of L.

[0018] 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 understood and derived by those having ordinary skill in the art based on the detailed description of the present invention described below. Effect of the Invention

[0019] 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.

[0020] 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 description of the drawings]

[0021] [Figure 1] FIG. 1 illustrates a structure of a radio frame.

[0022] [Diagram 2] FIG. 2 illustrates a resource grid of slots.

[0023] [Diagram 3] 1 shows an example of mapping physical channels into slots.

[0024] [Figure 4] FIG. 1 illustrates the concept of multi-slot PDCCH monitoring.

[0025] [Diagram 5] A diagram illustrating configuration regarding multi-slot PDCCH monitoring.

[0026] [Figure 6-7] 4 is a flowchart illustrating a signal transmission and reception method according to an embodiment of the present invention.

[0027] [Figure 8-11] FIG. 1 illustrates an apparatus according to an embodiment of the present invention. MODE FOR CARRYING OUT THEINVENTION

[0028] 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 Universal Terrestrial Radio Access (UTRA) and CDMA2000. TDMA can be implemented by radio technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA can be implemented by radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA), etc. UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3GPP (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.

[0029] For a clearer description, the present invention will be described based on a 3GPP (registered trademark) communication system (e.g., LTE-A, NR), but the technical idea of ​​the present invention is not limited thereto. LTE refers to technology after 3GPP TS 36.xxx Release 8. In particular, LTE technology after 3GPP TS 36.xxx Release 10 is called LTE-A, and LTE technology after 3GPP TS 36.xxx Release 13 is called LTE-A pro. 3GPP NR refers to technology after TS 38.xxx Release 15. LTE / NR can also be called a 3GPP system. "xxx" refers to the detailed number of the standard document. LTE / NR is collectively called 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, the following documents can be referred to.

[0030] 3GPP NR

[0031] -38.211: Physical channels and modulation

[0032] -38.212: Multiplexing and channel coding

[0033] -38.213: Physical layer procedures for control

[0034] -38.214: Physical layer procedures for data

[0035] -38.300: NR and NG-RAN Overall Description

[0036] -38.331: Radio Resource Control (RRC) protocol specification

[0037] FIG. 1 illustrates the structure of a radio frame used in NR.

[0038] In NR, uplink (UL) and downlink (DL) transmissions are composed of frames. A radio frame has a length of 10 ms and is defined as two 5 ms half-frames (HF). A half-frame is defined as five 1 ms 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, the symbols can include OFDM symbols (or CP-OFDM symbols), SC-FDMA symbols (or DFT-s-OFDM symbols).

[0039] 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.

[0040] [Table 1]

[0041] 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.

[0042] [Table 2]

[0043] In an NR system, the settings of OFDM(A) pneumatics (e.g., SCS, CP length, etc.) are different among multiple cells merged to one terminal (User Equipment; UE). As a result, the settings of (absolute time) intervals 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 are different among the merged cells.

[0044] NR supports multiple Orthogonal Frequency Division Multiplexing (OFDM) neurologies (e.g., subcarrier spacing, SCS) to support various 5G services. For example, a 15kHz SCS supports wide areas in traditional cellular bands, while a 30kHz / 60kHz SCS supports dense urban areas, lower latency, and wider carrier bandwidth.

[0045] The NR frequency band is defined by two types of frequency ranges (FR1 / FR2). FR1 / FR2 are configured as shown in Table 3 below. FR2 also stands for millimeter wave (mmW).

[0046] [Table 3]

[0047] Figure 2 illustrates the slot structure of an NR frame.

[0048] A slot includes multiple symbols in the time domain. For example, in the case of a general CP, one slot includes 14 symbols, while in the case of an extended CP, one slot includes 12 symbols. A carrier includes multiple subcarriers in the frequency domain. An RB (Resource Block) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. In the frequency domain, multiple RB interlaces (simply, interlaces) are defined. An interlace m ∈ {0, 1, ..., M-1} is composed of (common) RBs {m, M+m, 2M+m, 3M+m, ...}. M indicates 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 includes up to N (e.g., 5) BWPs. Data communication is performed in the activated BWP, and only one BWP is activated for one terminal in one cell / carrier. Each element in the resource grid is called a resource element (RE), and one modulation symbol can be mapped to it.

[0049] 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 transmitted and received between the base station and the terminal includes data and various control information, and various physical channels / signals exist depending on the type / use of the information transmitted and received. 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. The 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.

[0050] 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 RS 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 RS. UL RS include DM-RS, PT-RS and SRS (Sounding RS).

[0051] FIG. 3 shows an example of mapping physical channels within a slot.

[0052] A DL control channel, DL or UL data, and UL control channel are all included in one slot. For example, the first N symbols in a slot are used to transmit the DL control channel (hereinafter, DL control region), and the last M symbols in a slot are used to transmit the UL control channel (hereinafter, 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, data region) is used to transmit DL data or UL data. There is a time gap 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 in a slot are used as the time gap.

[0053] In the present invention, the base station is, for example, a gNodeB.

[0054] Downlink (DL) physical channels / signals

[0055] (1) PDSCH

[0056] 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 through a process of scrambling and modulation. The CW includes one or more code blocks (CB). One or more CBs are collected into one 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 together with the DMRS, and transmitted from the corresponding antenna port. The PDSCH is dynamically scheduled by the PDCCH (dynamic scheduling) or semi-statically scheduled (Configured Scheduling, CS) based on higher layer (e.g., RRC) signaling (and / or Layer 1 (L1) signaling (e.g., PDCCH)). Thus, in dynamic scheduling, PDSCH transmission is accompanied by a PDCCH, whereas in CS, PDSCH transmission is not accompanied by a PDCCH. CS includes semi-persistent scheduling (SPS).

[0057] (2) PDCCH

[0058] The PDCCH carries Downlink Control Information (DCI). For example, the PCCCH (i.e., DCI) carries the transmission format and resource allocation of DL-SCH, frequency / time resource allocation information for UL-SCH (shared channel), paging information for PCH (paging channel), system information on DL-SCH, frequency / time resource allocation information for higher layer control messages such as voluntary access response (RAR) transmitted on PDSCH, transmission power control command, and information on activation / deactivation of SPS / CS (Configured Scheduling), etc. Various DCI formats are provided depending on the information in the DCI.

[0059] Table 4 illustrates an example of a DCI format transmitted via the PDCCH.

[0060] [Table 4]

[0061] DCI format 0_0 is used to schedule TB-based (or TB-level) PUSCH, and DCI format 0_1 ​​is used to schedule TB-based (or TB-level) PUSCH or CBG (Code Block Group)-based (or CBG-level) PUSCH. DCI format 1_0 is used to schedule TB-based (or TB-level) PDSCH, and DCI format 1_1 is used to schedule TB-based (or TB-level) PDSCH or CBG-based (or CBG-level) PDSCH (DL grant DCI). DCI format 0_0 / 0_1 is referred to as UL grant DCI or UL scheduling information, and DCI format 1_0 / 1_1 is referred to as DL grant DCI or UL scheduling information. DCI format 2_0 is used to deliver dynamic slot format information (e.g., dynamic SFI) to the terminal, and DCI format 2_1 is used to deliver downlink pre-Emption information to the terminal. 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.

[0062] 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 Cell-RNTI (C-RNTI). If the PDCCH is related to paging, the CRC is masked to P-RNTI (Paging-RNTI). If the PDCCH is related to system information (e.g., System Information Block, SIB), the CRC is masked to System Information RNTI (SI-RNTI). If the PDCCH is related to an unsolicited access response, the CRC is masked to Random Access-RNTI (RA-RNTI).

[0063] Table 5 shows an example of the use of PDCCH according to RNTI and the transmission channel. The transmission channel indicates the transmission channel related to the data carried by the PDSCH / PUSCH scheduled by the PDCCH.

[0064] [Table 5]

[0065] The modulation method of the PDCCH is fixed (e.g., Quadrature Phase Shift Keying, QPSK), and one PDCCH is composed of 1, 2, 4, 8, or 16 CCEs (Control Channel Elements) depending on the AL (Aggregation Level). One CCE is composed of six REGs (Resource Element Groups). One REG is defined by one OFDM symbol and one (P)RB.

[0066] PDCCH is transmitted in a CORESET (Control Resource Set). CORESET corresponds to a physical resource / parameter set used to carry PDCCH / DCI in BWP. For example, CORESET includes a REG set having a predetermined neurology (e.g., SCS, CP length, etc.). 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 CORESET are as follows: One or more CORESETs are configured for one UE, and multiple CORESETs are superimposed in the time / frequency domain.

[0067] - controlResourceSetId: Indicates the identification information (ID) of the CORESET.

[0068] - frequencyDomainResources: Indicates the frequency domain resources of the CORESET. It is indicated by a bitmap, where each bit corresponds to an RB group (= 6 consecutive RBs). For example, the most significant bit (MSB) 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 the CORESET.

[0069] - duration: indicates the time domain resource of CORESET. It indicates the number of consecutive OFDMA symbols that compose CORESET. For example, duration has a value of 1 to 3.

[0070] - cce-REG-MappingType: indicates the CCE-to-REG mapping type. Interleaved and non-interleaved types are supported.

[0071] - precoderGranularity: indicates the precoder granularity in the frequency domain.

[0072] - tci-StateSPDCCH: Indicates information (e.g., TCI-StateID) indicating the TCI (Transmission Configuration Indication) state for the PDCCH. The TCI state is used to provide a Quasi-Co-Location (QCL) relationship between DL RSs and PDCCH DMRS ports in an RS set (TCI-State).

[0073] - tci-PresentInDCI: indicates whether the TCI field in the DCI is included or not.

[0074] - pdcch-DMRS-ScramblingID: indicates the information used for initialization of the PDCCH DMRS scrambling sequence.

[0075] For PDCCH reception, the UE monitors a set of PDCCH candidates in the CORESET (e.g., blind decoding). The 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 on 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.

[0076] Table 6 illustrates the PDCCH search space.

[0077] [Table 6]

[0078] An 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 in each DL BWP of the serving cell. For example, the following parameters / information are provided for each SS set (by the RRC information element (IE) SearchSpace): Each SS set is associated with one CORESET, and each CORESET configuration is associated with one or more SS sets.

[0079] - searchSpaceId: Indicates the index s of the SS set.

[0080] - controlResourceSetId: indicates the CORESETp associated with the SS set s.

[0081] - monitoringSlotPeriodicityAndOffset: k s PDCCH monitoring periodicity of slots and s This indicates the PDCCH monitoring offset for this slot.

[0082] - monitoringSymbolsWithinSlot: indicates a PDCCH monitoring pattern within a slot indicating the first symbol of a CORESET for PDCCH monitoring within each slot in which the UE monitors the PDCCH. That is, monitoringSymbolsWithinSlot indicates the first OFDMA symbol for PDCCH monitoring within a slot in which PDCCH monitoring is set. The first symbol of a CORESET for PDCCH monitoring within each slot in which the UE monitors the PDCCH is indicated via a bitmap, with each bit corresponding to each OFDMA symbol within the slot. The MSB of the bitmap corresponds to the first OFDM symbol within the slot. The OFDMA symbol corresponding to a bit whose bit value is 1 corresponds to the first symbol of a CORESET within the slot.

[0083] - duration: the number of possible consecutive slots T in the search space set s s <k s Shows.

[0084] - nrofCandidates: indicates the number of PDCCH candidates for AL={1, 2, 4, 8, 16} (e.g., any one of the values ​​0, 1, 2, 3, 4, 5, 6, 8).

[0085] - searchSpaceType: Indicates whether the SS type is CSS or USS.

[0086] - DCI Format: Indicates the DCI format of the PDCCH candidate.

[0087] Based on the CORESET / SS set configuration, the terminal can monitor PDCCH candidates in one or more SS sets in a slot. An occasion (e.g., a time / frequency resource) for monitoring PDCCH candidates is defined as a PDCCH (monitoring) opportunity. One or more PDCCH (monitoring) opportunities are configured in a slot.

[0088] The terminal determines the PDCCH monitoring occasion on the active DL BWP based on the PDCCH monitoring period, the PDCCH monitoring offset, and the PDCCH monitoring pattern in the slot. For example, for a search space set s, the terminal determines the PDCCH monitoring occasion on the active DL BWP based on the PDCCH monitoring period, the PDCCH monitoring offset, and the PDCCH monitoring pattern in the slot. f *N frame、u slot +n u s、f -o s )mod k s = 0, then frame number n f Number n in the frame u s、f The terminal can determine that the PDCCH monitoring period exists in a slot where u s、f Starting from T s Monitor the PDCCH candidates for the search space set s for consecutive slots and s -T s The PDCCH candidates for the search space set s are not monitored for consecutive slots.

[0089] 1. Control channel monitoring in high frequency bands

[0090] The above contents may be applied in combination with the method proposed in the present invention described below, or may be supplemented to clarify the technical features of the method proposed in the present invention.

[0091] In addition, the method described below can be similarly applied to the aforementioned NR system (licensed band) or shared spectrum, and it goes without saying that the technical ideas proposed in the present invention can be embodied in the relevant systems and can be modified or replaced according to the terms, expressions, structures, etc. defined in each system.

[0092] The NR system supports multiple neurologies (or subcarrier spacing, SCS) to support various 5G services. For example, when the SCS is 15 kHz, it supports a wide area in the traditional cellular band, when the SCS is 30 kHz / 60 kHz, it supports dense urban areas, lower latency, and wider carrier bandwidth, and when the SCS is 60 kHz or higher, it supports bands above 24.25 GHz. Until Release 16, the NR frequency bands are defined into 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 the frequency bands defined by FR1 / FR2 or higher (e.g., 52.6 GHz to 71 GHz).

[0093] 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, and the like defined for FR1 and FR2 in conventional NR systems do not need to be applied to FR2-2.

[0094] In the FR2-2 band, SCSs of 120 kHz, 480 kHz, and 960 kHz are used for NR operation. In the case of SCSs of 480 kHz and 960 kHz, the length of the OFDM symbol is shorter than that of 120 kHz. For example, an OFDM symbol of 480 kHz is 1 / 4 times as long as an OFDM symbol of 120 kHz, and an OFDM symbol of 960 kHz is 1 / 8 times as long as an OFDM symbol of 120 kHz. For short-length slots to which 480 kHz and 960 kHz are applied, if PDCCH monitoring is performed in all slots, power consumption, etc., is a burden on the terminal. Therefore, when SCSs of 480 kHz and / or 960 kHz are configured, multi-slot PDCCH monitoring is introduced.

[0095] Multi-slot PDCCH monitoring refers to an operation of performing PDCCH monitoring by defining BD (Blind decoding) / CCE (control channel element) limits using multiple consecutive slots as a reference and / or unit. In conventional NR rel-15, BD / CCE limits are defined for each slot, and in NR rel-16, BD / CCE limits are defined for each span confined within one slot. A span refers to a PDCCH monitoring unit consisting of consecutive symbols.

[0096] Hereinafter, PDCCH monitoring performed in slot units is referred to as per-slot monitoring, PDCCH monitoring performed in span units is referred to as per-span monitoring, and PDCCH monitoring performed in slot-group units is referred to as per-X monitoring. Hereinafter, in terms related to multi-slot (PDCCH) monitoring (i.e., per-X monitoring), "slot-group size," "X," and "Xs" may all refer to the time unit of per-X monitoring.

[0097] 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.

[0098] A number of consecutive slots that are the basis of multi-slot PDCCH monitoring are called a slot group. A slot group is composed of X consecutive slots, and BD / CCE restrictions are defined for each slot group. For example, for 480 kHz SCS, BD / CCE restrictions are defined for each slot group consisting of X=4 slots. Also, Y consecutive slots are defined within the slot group. There may be a type of SS set (search space sets) that is restricted so that PDCCH monitoring is performed only in Y slots. Meanwhile, in per-X monitoring operation, some parameters (e.g., periodicity, offset, duration) of SS set configuration need to be configured (by the base station to the terminal) in X units. For example, periodicity is configured in slot units in per-slot monitoring, but is configured in X slot units in per-X monitoring. As an example, if X=8 is configured in a cell using 960 kHz SCS, the periodicity value for per-X monitoring consists of only multiples of 8.

[0099] Also, PDCCH monitoring is performed only in Y specific consecutive slots in a slot-group including X consecutive slots, and PDCCH monitoring is not performed in slots other than the Y slot among the X slots.

[0100] A PDCCH corresponding to a particular SS set type may be monitored only in the Y slot, and a PDCCH corresponding to another SS set type may be monitored in the X slot.

[0101] In the UE, PDCCH monitoring is performed in units of search space set (SS set). SS sets include common SS sets and UE-specific SS sets. Common SS (CSS) sets include Type 0 PDCCH CSS set (Type 0-PDCCH CSS set), Type 0A PDCCH CSS set (Type 0-PDCCH CSS set), Type 1 PDCCH CSS set based on dedicated higher layer signalling (Type 1-PDCCH CSS set provided in SIB1), Type 2 PDCCH CSS set (Type 3-PDCCH CSS sets), and Type 3 PDCCH CSS set (Type 3-PDCCH CSS sets).

[0102] The SS set types monitored in the X slot (hereinafter, Group 2 SS set or Group(2) SS) include, for example, a Type 0 PDCCH CSS set, a Type 0A PDCCH CSS set, a Type 2 PDCCH CSS set, and a Type 1 PDCCH CSS set based on SIB1. The SS set types monitored in the Y slot (hereinafter, Group 1 SS set or Group(1) SS) include a Type 1 PDCCH CSS set, a Type 3 PDCCH CSS set, and a USS set based on dedicated higher layer signaling.

[0103] FIG. 4 is a diagram for explaining the concept of multi-slot PDCCH monitoring. In particular, FIG. 4 shows an example of monitoring PDCCH based on a combination of X and Y. In FIG. 4, X=4 and Y=2 are set. In FIG. 4, PDCCH is monitored in a cell with 960 kHz SCS set. Slot-groups of X=4 are continuous and do not overlap in the time domain. The setting of the first two slots as Y slots among X slots is an example, and the position of Y slot may be the middle two slots or the last two slots. Since the USS set is exemplified as the second SS set type, the PDCCH for the USS set is monitored only in Y slots, that is, slot n, slot n+1, slot n+4, and slot n+5. In other words, PDCCH MO (monitoring occasion) is set and / or located only in Y slot.

[0104] Table 7 shows the operations for multi-slot monitoring.

[0105] [Table 7]

[0106] Referring to Table 7, X, which is the number of slots per slot-group supported in multi-slot monitoring, and Y, the number of slots for the group 1 SS set, are set for each SCS.

[0107] Table 8 shows the operations related to SS set configuration.

[0108] [Table 8]

[0109] Referring to Table 8, the SS set configuration for multi-slot monitoring is received from the base station to the terminal by RRC signaling. The SS set configuration includes the following parameters.

[0110] - monitoringSlotPeriodicityAndOffset-r17

[0111] - duration-r17

[0112] - monitoringSymbolsWithinSlot

[0113] - monitoringSlotsWithinSlotGroup-r17

[0114] 5 is a diagram illustrating a configuration for multi-slot PDCCH monitoring. Referring to FIG. 5, according to some embodiments of the present invention, s and offset o s is provided by monitoringSlotPeriodicityAndOffset-r17, which is the duration T corresponding to the number of possible consecutive slots in the search space set for multi-slot monitoring. s is provided by duration-r17, and which slots in a slot-group are set for multi-slot PDCCH monitoring can be provided by monitoringSlotsWithinSlotGroup-r17. The first symbol for PDCCH monitoring in a slot that is a target of multi-slot PDCCH monitoring, i.e., a slot in which a monitoring occasion exists, can be provided by the RRC parameter monitoringSymbolsWithinSlot, similar to per-slot PDCCH monitoring.

[0115] The operation, setting method, and restrictions for this parameter will be explained below.

[0116] 1-(1).monitoringSlotsWithinSlotGroup-r17

[0117] The RRC parameter monitoringSlotsWithinSlotGroup-r17 is a parameter for multi-slot monitoring. Whether or not a MO (monitoring occasion) can exist in each slot for the slot-group length (i.e., slot-group size) is set by a bitmap. A bitmap with a width of X bits is used for each SCS. For example, each bit of an 8-bit bitmap for a cell to which a 960 kHz SCS is applied indicates whether or not an MO in the search space exists for each of the 8 slots included in the slot group. A 4-bit bitmap for a cell to which a 480 kHz SCS is applied indicates whether or not an MO in the search space exists for each of the 4 slots included in the slot group. In some of the following descriptions, X provided by the base station by RRC configuration, etc. may be represented as L in order to distinguish X of the combination (X, Y) from X set by the base station. For example, the size of the slot group that the base station configures for the terminal through RRC configuration, etc. is referred to as L, and the size of the slot group based on the combination (X, Y) that the terminal reports to the base station or the combination (X, Y) that the terminal assumes or determines based on its own capabilities is referred to as X.

[0118] In the following proposed method, we assume that an 8-bit bitmap is used for 480 / 960 kHz, but the application of the proposed method is not limited to this, and the same method can be applied to bitmaps with other bit widths (e.g., when they differ depending on the SCS).

[0119] [Definition of monitoringSlotsWithinSlotGroup-r17]

[0120] The absolute position of the slot represented by each bit of the bitmap monitoringSlotsWithinSlotGroup-r17 (i.e., the position within each frame or the position within each subframe, or the slot index) is defined in any of the following ways. Hereinafter, each bit of the 8-bit bitmap is represented as {b0, b1, b2, b3, b4, b5, b6, b7}.

[0121] (Method 1) Each bit in the bitmap indicates whether MO exists in each slot of the slot-group. The meaning of the slot-group is as follows: the first slot-group of a subframe means X consecutive slots starting from the first slot of the subframe. From now on, slot-groups are non-overlapped and consecutive with respect to the first slot-group. The method of defining monitoringSlotsWithinSlotGroup-r17 is differentiated depending on whether X=8 or X=4.

[0122] (Method 1-1) When X=8, the bit value of b0 indicates whether or not MO exists in the first slot of each slot-group. From the second slot of a slot-group, it is mapped to each bit in the bitmap, b1, b2, ..., b7. For example, b1 indicates whether or not MO exists in the slot next to the slot mapped to b0, and b2 indicates whether or not MO exists in the slot next to the slot mapped to b1. Bits b3 to b6 are mapped to the next slots in each slot-group in order, and b7 indicates whether or not MO exists in the last slot in the slot-group.

[0123] (Method 1-2) When X=4, the bit value of b0 indicates whether MO exists in the first slot of each slot-group. From the second slot onwards, it is mapped to b1, b2, b3 in order, and b4, b5, b6, and b7 are not used. For example, the terminal ignores the bit values ​​transmitted in b4, b5, b6, and b7.

[0124] (Method 1-3) When X=4, the meaning of {b0, b1, b2, b3} is the same as in Method 1-2. Therefore, the bit value of b0 means whether or not MO exists in the first slot of each slot-group. From the second slot onwards, it is mapped to b1, b2, b3 in order. {b4, b5, b6, b7} are different from Method 1-2, and have the values ​​of b4=b0, b5=b1, b6=b2, b7=b3, respectively.

[0125] (Method 1-4) When X=4, the bit value of b0 means whether MO exists in the first slot of the eight slots of two consecutive slot-groups {slot-group#(n), slot-group#(n+1)}. From the second slot, it is mapped to b1, b2, ..., b7 in order. Therefore, {b0, b1, b2, b3} are mapped to four slots of slot-group#(n), and {b4, b5, b6, b7} are mapped to four slots of slot-group#(n+1). Slot-group#(n) means the 1st, 3rd, 5th, ... slot-groups from the start of the subframe, or the 2nd, 4th, 6th, ... slot-groups.

[0126] (Method 1-5) When X=4, the bit value of b0 indicates whether MO exists in the first slot of each slot-group. From the second slot onwards, it is mapped to b2, b4, and b6 in order. b1, b3, b5, and b7 have the values ​​of b1=b0, b3=b2, b5=b4, and b7=b6, respectively.

[0127] (Method 1-6) When X=4, the meaning of {b0, b1, b2, b3} is the same as (Method 1-2). Therefore, the bit value of b0 indicates whether MO exists in the first slot of each slot-group. From the second slot onwards, it is mapped to b1, b2, b3 in order. It is fixed as {b4, b5, b6, b7}={1, 1, 1, 1}.

[0128] (Method 1-7) When X=2, the bit value of b0 means whether or not MO exists in the first slot of each slot-group. The bit value of b1 means whether or not MO exists in the second slot of the slot-group. b2, b3, b4, b5, b6, and b7 are not used.

[0129] (Method 1-8) When X=2, the meaning of {b0, b1} is the same as (Method 1-7). Therefore, the bit value of b0 means whether or not MO exists in the first slot of each slot-group. The bit value of b1 means whether or not MO exists in the second slot of the slot-group. {b2, b3, b4, b5, b6, b7} have the values ​​of b2=b0, b3=b1, b4=b0, b5=b1, b6=b0, and b7=b1, respectively.

[0130] (Method 1-9) When X=2, the bit value of b0 indicates whether or not MO exists in the first slot of the 8 slots of the 4 consecutive slot groups {slot-group#(n), slot-group#(n+1), slot-group#(n+2), slot-group#(n+3)}. From the second slot, they are mapped to b1, b2, ..., b7 in order. {b0, b1} are mapped to two slots of slot-group#(n). {b2, b3} are mapped to two slots of slot-group#(n+1). {b4, b5} are mapped to two slots of slot-group#(n+2). {b6, b7} are mapped to two slots of slot-group#(n+3). Slot group#(n) means, but is not limited to, the 1st, 5th, 9th, ... slot-groups from the start of the subframe.

[0131] (Method 1-10) When X=2, the bit value of b0 means whether or not an MO exists in the first slot of each slot-group. It has values ​​of b3=b2=b1=b0. b4 means whether or not an MO exists in the second slot of each slot-group. It has values ​​of b7=b6=b5=b4.

[0132] (Method 1-11) When X=2, the meaning of {b0, b1} is the same as (Method 1-7). Therefore, the bit value of b0 means whether or not MO exists in the first slot of each slot-group. The bit value of b1 means whether or not MO exists in the second slot of the slot-group. It is fixed as {b2, b3, b4, b5, b6, b7}={1, 1, 1, 1, 1, 1}.

[0133] (Method 2) The bit of the bitmap indicates the presence or absence of MO for 8 consecutive slots starting from the earliest slot after the offset set in monitoringSlotPeriodicityAndOffset-r17. However, if X=4, it may indicate the presence or absence of MO for 4 slots depending on the method. s , offset value o s This is expressed as follows.

[0134] (Method 2-1) X=8, the bit value of b0 is (n f *N frame、μ slot +n μ s、f -o s )mod k s Slot #n determined by =0 μ s、f and slot #(n μ s、f+8*k) means whether or not an MO exists in the slot-group. k=1, 2, 3, ..., k is a natural number equal to or greater than 1. b1, b2, ..., b7 are mapped in order from the slot next to the slot mapped to b0. For example, b1 indicates whether or not an MO exists in the slot next to the slot mapped to b0, and b2 indicates whether or not an MO exists in the slot next to the slot mapped to b1. Also, b3 to b7 are mapped in order to slots in the slot-group.

[0135] (Method 2-2) When X=4, the bit value of b0 is (n f *N frame、μ slot +n μ s、f -o s )mod k s Slot #n determined by =0 μ s、f and slot #(n μ s、f This means whether MO exists in the next slot (+4*k). k is a natural number equal to or greater than 1, such as 1, 2, 3, .... b1, b2, and b3 are mapped in order from the slot next to the slot mapped to b0. b4, b5, b6, and b7 are not used. For example, the terminal ignores the bit values ​​transmitted in b4, b5, b6, and b7.

[0136] (Method 2-3) When X=4, the meaning of {b0, b1, b2, b3} is the same as in (Method 2-2). Therefore, the bit value of b0 is (n f *N frame、μ slot +n μ s、f -o s )mod k s Slot #n determined by =0 μ s、f and slot #(n μ s、f+4*k) indicates whether MO exists or not. k=1, 2, 3, ..., where k is a natural number equal to or greater than 1. b1, b2, and b3 are mapped in order from the slot next to the slot mapped to b0. {b4, b5, b6, b7} have the values ​​b4=b0, b5=b1, b6=b2, and b7=b3, respectively.

[0137] (Method 2-4) When X=4, the meaning of {b0, b1, b2, b3} is the same as in Method 2-2. Therefore, the bit value of b0 is (n f *N frame、μ slot +n μ s、f -o s )mod k s Slot #n determined by =0 μ s、f and slot #(n μ s、f +4*k) indicates whether MO exists or not. k=1, 2, 3, ..., k is a natural number equal to or greater than 1. b1, b2, and b3 are mapped in order from the slot next to the slot mapped to b0. {b4, b5, b6, b7} indicates whether MO exists or not in the +1, +2, +3, and +4 next slots from the slot mapped to b3.

[0138] (Method 2-5) When X=4, the meaning of b0 is the same as in method 2-2, b2, b4, and b6 are mapped in order from the slot next to the slot represented by b0, and b1, b3, b5, and b7 have the values ​​b1=b0, b3=b2, b5=b4, and b7=b6, respectively.

[0139] (Method 2-6) When X=4, the meaning of {b0, b1, b2, b3} is the same as in Method 2-2. Therefore, the bit value of b0 is (n f *N frame、μ slot +n μ s、f -o s )mod k s Slot #n determined by =0 μ s、f and slot #(nμ s、f +4*k) indicates whether MO exists or not. k=1, 2, 3, …, where k is a natural number equal to or greater than 1. b1, b2, and b3 are mapped in order from the slot next to the slot mapped to b0. It is fixed as {b4, b5, b6, b7}={1, 1, 1, 1}.

[0140] (Method 2-7) When X=2, the bit value of b0 is (n f *N frame、μ slot +n μ s、f -o s )mod k s Slot #n determined by =0 μ s、f and slot #(n μ s、f +2*k), where k is a natural number greater than or equal to 1, such as 1, 2, 3, .... b1 is the slot #(n μ s、f +1) and slot #(n μ s、f b2, b3, b4, b5, b6, and b7 are not used. For example, the terminal shall ignore the bit values ​​transmitted in b2, b3, b4, b5, b6, and b7.

[0141] (Method 2-8) When X=2, the meaning of {b0, b1} is the same as in Method 2-7. Therefore, the bit value of b0 is (n f *N frame、μ slot +n μ s、f -o s )mod k s Slot #n determined by =0 μ s、f and slot #(n μ s、f +2*k), where k is a natural number greater than or equal to 1, such as 1, 2, 3, .... b1 is the slot #(n μ s、f +1) and slot #(n μ s、f+1+2*k) means whether MO exists or not. {b2, b3, b4, b5, b6, b7} have the values ​​b2=b0, b3=b1, b4=b0, b5=b1, b6=b0, b7=b1 respectively.

[0142] (Method 2-9) When X=2, the meaning of {b0, b1} is the same as in Method 2-7. Therefore, the bit value of b0 is (n f *N frame、μ slot +n μ s、f -o s )mod k s Slot #n determined by =0 μ s、f and slot #(n μ s、f +2*k), where k is a natural number greater than or equal to 1, such as 1, 2, 3, .... b1 is the slot #(n μ s、f +1) and slot #(n μ s、f +1+2*k) The bit values ​​of {b2, b3, b4, b5, b6, b7} indicate whether MO exists in the +1, +2, +3, +4, +5, and +6th next slots from the slot mapped to b1.

[0143] (Method 2-10) When X=2, the meaning of b0 is the same as in Method 2-7. Therefore, the bit value of b0 is (n f *N frame、μ slot +n μ s、f -o s )mod k s Slot #n determined by =0 μ s、f and slot #(n μ s、f +2*k), where k is a natural number equal to or greater than 1. It has values ​​b3=b2=b1=b0. The bit value of b4 indicates whether or not an MO exists in the slot next to the slot corresponding to b0. It has values ​​b7=b6=b5=b4.

[0144] (Method 2-11) When X=2, the meaning of {b0, b1} is the same as in Method 2-7. Therefore, the bit value of b0 is (n f *N frame、μ slot +n μ s、f -o s )mod k s Slot #n determined by =0 μ s、f and slot #(n μ s、f +2*k), where k is a natural number greater than or equal to 1, such as 1, 2, 3, .... b1 is the slot #(n μ s、f +1) and slot #(n μ s、f +1+2*k) indicates whether MO exists or not. It is fixed as {b2, b3, b4, b5, b6, b7} = {1, 1, 1, 1, 1, 1}.

[0145] Method 1-(1) is defined for X=4 or X=8, respectively. When the terminal performs multi-slot monitoring, a bitmap based on any combination of the above methods is defined based on X set in the terminal. The terminal operates based on the defined bitmap. If the terminal reports that it is capable of all X=4 and / or X=8, the terminal can infer whether the set X value is X=4 or X=8 based on the set bitmap value. Specifically, when the bitmaps of all SS sets for the group 1 SS set set in the terminal are combined (union) to obtain the union of MO, the X (or (X, Y) combination) that is the basis of monitoringSlotsWithinSlotGroup-r17 can be inferred depending on whether the union is included in the Y slot of the (X, Y) combination including X=4 or included in the Y slot of the (X, Y) combination including X=8. If the union of MO is included in the Y slot for two or more (X, Y) combinations, a rule is required for the terminal to select one of the (X, Y) combinations of two or more (X, Y) combinations. In this case, the terminal selects the default X (or default / mandatory (X, Y) combination) or (X, Y) that includes the largest X among the Xs that the terminal can use. Or, if the terminal does not need to select Y, the terminal selects the largest X (or default X).

[0146] For example, if the union of MOs configured on a device operating at 960 kHz aligns with both (4, 1) and (8, 1) among the (X, Y) combinations, the device will select (8, 1) with the larger X value as the standard.

[0147] As yet another example, if the union of MOs set in a terminal operating at 960 kHz matches any of the (X, Y) combinations (4, 1), (8, 1), and (8, 4), the terminal selects X = 8. If the terminal should select the (X, Y) combination, the terminal selects (8, 1) as the reference (X, Y) combination of the bitmap and performs multi-slot monitoring.

[0148] Furthermore, referring to Tables 7 and 8, the terminal expects the bitmap to be set only in a contiguous form of "1" for Group(1) SS, but in the case of Method 1-4 or Method 2-4, the terminal expects the bitmap to be non-contiguous "1" regardless of the type of SS set.

[0149] [Validity of the parameter for monitoringSlotsWithinSlotGroup-r17]

[0150] When a terminal operates based on the Mandatory (X, Y) combination, the terminal (terminals not capable of Optional (X, Y)) may not use the monitoringSlotsWithinSlotGroup-r17 parameter. Since all Mandatory (X, Y) are Y=1, in this case the terminal may not use the monitoringSlotsWithinSlotGroup-r17 parameter. The terminal expects that the monitoringSlotsWithinSlotGroup-r17 parameter is not set, and may ignore it if it is set. If the monitoringSlotsWithinSlotGroup-r17 parameter is not used, the terminal operates assuming that the MO position is the slot corresponding to b0 defined in methods 1 and 2. Alternatively, if the monitoringSlotsWithinSlotGroup-r17 parameter is defined by method 1, the MO is set to the first slot of the slot-group (only within the duration). Or, if the monitoringSlotsWithinSlotGroup-r17 parameter is defined by method 2, MO is set periodically (only within duration) from the first slot after the offset. If the monitoringSlotsWithinSlotGroup-r17 parameter is defined by method 2, the period is 4 / 8 slots for 480 kHz / 960 kHz respectively. Or, the period is the same as the length of the slot-group.

[0151] Optional (X, Y) combinations can be used by the terminal expecting the monitoringSlotsWithinSlotGroup-r17 parameter to be set. The terminal uses the configured bitmap to determine the MO location by method 1 and / or method 2.

[0152] Alternatively, the monitoringSlotsWithinSlotGroup-r17 parameter does not have to be set for a terminal that can use the Optional (X, Y) combination when Y=1 for the (X, Y) combination.

[0153] For example, if a terminal supports multi-slot monitoring with (X, Y)=(4, 1) for a 960 kHz SCS, the monitoringSlotsWithinSlotGroup-r17 parameter is not set for the corresponding SS set. In this case, the MO, monitoring slot, monitoring symbol, and / or MO span are determined according to the offset set for the corresponding SS set. In yet another example, the monitoringSlotsWithinSlotGroup-r17 parameter is not set for (X, Y)=(2, 1) for a 480 kHz SCS, and the MO is determined according to the offset.

[0154] Also, if monitoringSlotsWithinSlotGroup-r17 is not configured for a particular SS set, the UE operates assuming that the corresponding SS set is configured based on Y=1. That is, whether Y=1 or Y>1 for (X, Y) on which the UE configures a particular SS set is implicitly indicated depending on whether the monitoringSlotsWithinSlotGroup-r17 parameter is configured. Alternatively, since the monitoringSlotsWithinSlotGroup-r17 parameter is not configured, the UE operates assuming that the SS set is configured based on Y=1 in the corresponding cell (or the BWP (bandwidth part) in which the corresponding SS set is included / configured, or the SSSG (search space set group) in which the corresponding SS set is included / configured).

[0155] For example, if a terminal operating in 480 kHz SCS reports that it can use combinations (4, 1) and (4, 2) of (X, Y), if the monitoringSlotsWithinSlotGroup-r17 parameter is not set for all SS sets configured in the corresponding cell (or BWP or SSSG), the terminal operates assuming that the SS set configured in the corresponding cell (or BWP or SSSG) is configured based on (4, 1). If the monitoringSlotsWithinSlotGroup-r17 parameter is set for one or more SS sets, the terminal operates assuming that the SS set configured in the corresponding cell (or BWP or SSSG) is configured based on (4, 2).

[0156] In yet another example, if a terminal operating in 960 kHz SCS reports that it can use combinations (8, 1), (8, 4), (4, 2), and (4, 1) of (X, Y), if the monitoringSlotsWithinSlotGroup-r17 parameter is not configured for all SS sets configured in the corresponding cell (or BWP or SSSG), the terminal operates assuming that the SS set configured in the corresponding cell (or BWP or SSSG) is configured based on (8, 1) or (4, 1). If the monitoringSlotsWithinSlotGroup-r17 parameter is configured for one or more SS sets, the terminal operates assuming that the SS set configured in the corresponding cell (or BWP or SSSG) is configured based on (8, 4) or (4, 2). Furthermore, in a situation where it should be assumed that an SS set is configured based on one of the two combinations, (8, 4) and (4, 2), the terminal operates assuming that the combination is mandatorily supported (X, Y) or that the combination includes the largest X (or has the largest BD / CCE budget). Thus, of (8, 1) and (4, 1), the terminal may assume that the combination (8, 1), which is the mandatorily supported combination, is configured. Alternatively, of (8, 1) and (4, 1), the terminal operates assuming that the combination (X, Y) with the larger BD / CCE budget is configured. Also, of (8, 4) and (4, 2), the terminal operates assuming that the combination (8, 4) with the larger BD / CCE budget is configured.

[0157] [Default value of the parameter "monitoringSlotsWithinSlotGroup-r17"]

[0158] The default value of monitoringSlotsWithinSlotGroup-r17 is "10000000". If monitoringSlotsWithinSlotGroup-r17 is not set by the base station, the terminal operates assuming the default value. Alternatively, the default value contains only one "1". If the default value contains two or more "1's", the value of the first bit in the b0 position is "1".

[0159] The size of monitoringSlotsWithinSlotGroup (=bitwidth, hereinafter referred to as L) is not fixed to 8 bits and may be different for each SS set. For example, for two SS sets configured in one BWP, L is set to 4 bits for SS#1 and 8 bits for SS#2. Meanwhile, according to some scenarios, when the SCS configured for the cell / BWP configured with multi-slot PDCCH monitoring is 480 kHz, the size of the slot-group (Xs) is supported as Xs=4, and when it is 960 kHz, Xs=4 or Xs=8 is set. In addition, among the settings for the SS sets for the 480 kHz and 960 kHz cells / BWPs, the values ​​of the periodicity and offset configured by monitoringSlotPeriodicityAndOffset(-r17) and the duration configured by duration(-r17) may be multiples of L.

[0160] Therefore, if monitoringSlotsWithinSlotGroup is not explicitly set by the base station, a bitmap value of monitoringSlotsWithinSlotGroup and / or a default value of L are required. As one method for this, the maximum Xs that can be supported by each SCS is used as the default value of L, and the default value of the bitmap is the L-bit length bitmap whose MSB (leftmost bit) is "1". For example, in the case of an SS set belonging to a 480 kHz SCS cell (and / or BWP), if monitoringSlotsWithinSlotGroup is not set, L=4 and / or monitoringSlotsWithinSlotGroup='1000' are used as the default values. As another example, in the case of an SS set belonging to a 960 kHz SCS cell (and / or BWP), if monitoringSlotsWithinSlotGroup is not set, L=8 and / or monitoringSlotsWithinSlotGroup='10000000' are used as the default values. These examples assume that the number of "1"s in the default bitmap is one, and if the number of "1"s is k (>1), a bitmap consisting of k "1"s and (Lk) "0"s, each of which consists of k bits on the left and (Lk) bits on the right, may be used as the default value. For example, when L=8 and k=2, the default bitmap=11000000.

[0161] Alternatively, the basic bitmap and / or L of monitoringSlotsWithinSlotGroup can be inferred depending on the set monitoringSlotPeriodicityAndOffset(-r17) and duration(-r17) values. In some implementations, the periodicity, offset, and duration of an SS set set for 480 / 960 kHz multi-slot monitoring are limited to multiples of L, so L for the SS set can be inferred / determined depending on whether these set values ​​(or some or all of these set values) are multiples of 8. For example, for an SS set with a period of "12" set by monitoringSlotPeriodicityAndOffset(-r17) (as an example, when at least one of the periodicity, offset, and duration is not a multiple of 8), when monitoringSlotsWithinSlotGroup is not set, L is inferred / determined to be 4. This is because "12" cannot be a multiple of 8. As another example, when the periodicity, offset, and duration for a particular SS set are all set to multiples of 8, if monitoringSlotsWithinSlotGroup is not set, L is inferred / determined to be 8. This method may be applied regardless of whether the SCS of the cell / BWP is 480 kHz or 960 kHz. Alternatively, this method may be applied only to a particular SCS. For example, this method may be applied only to 480 kHz supporting only Xs=4, or 960 kHz supporting Xs=4 or 8. In these cases, the basic bitmap is determined as "1000" or "10000000", etc., according to the above-mentioned method.

[0162] Meanwhile, according to some scenarios, if duration(-r17) is not set for 480 / 960 kHz SCS, the bitmap size (i.e., L) of the configured monitoringSlotsWithinSlotGroup is used as the basic value of the duration. In this case, if monitoringSlotsWithinSlotGroup is not set, the basic value of the duration is determined using the basic bitmap and / or L according to the above-mentioned method. In this case (when duration(-r17) is not set), the basic value of the duration is determined according to the SCS configured for the cell / BWP, for example, duration=4 slots for 480 kHz and duration=8 slots for 960 kHz. Alternatively, for an SS set for which monitoringSlotsWithinSlotGroup is not set and duration is set, the terminal and the base station operate assuming L=8 if the duration is a multiple of 8, and L=4 if it is not a multiple of 8, as described above. Furthermore, the terminal operates with the expectation that either one of monitoringSlotsWithinSlotGroup or duration is always set for a particular SS set.

[0163] [Selection of an active(X, Y) when a UE are capable with multiple(X, Y)]

[0164] When the terminal reports to the base station that multiple (X, Y) combinations are available, the base station must determine which X and / or (X, Y) to use as a criterion for setting monitoringSlotsWithinSlotGroup-r17. Also, if the configured bitmap monitoringSlotsWithinSlotGroup-r17 matches two or more X or (X, Y), the terminal must determine which X and / or (X, Y) the configured monitoringSlotsWithinSlotGroup-r17 is based on and perform a multi-slot monitoring operation.

[0165] In this case, the terminal (and / or base station) combines the bitmaps of all SS sets belonging to the group 1 SS set configured in the terminal to obtain the union of MO, and then can infer X (or (X, Y) combination) that is the basis of monitoringSlotsWithinSlotGroup-r17 depending on whether the union is included in the Y slot of the (X, Y) combination where X=4 is included or the Y slot of the (X, Y) combination where X=8 is included. If the union of MO is included in the Y slot for two or more (X, Y) combinations, a rule is required for the terminal to select one (X, Y) combination. In this case, the terminal selects the basic X (or default / mandatory (X, Y) combination) or the (X, Y) that includes the maximum X among the Xs that the terminal can use as a basis. Alternatively, if the terminal does not need to select up to Y, the terminal selects the maximum X (or default X).

[0166] For example, if the union of MOs set on a terminal operating at 960 kHz matches both (4, 1) and (8, 1) among the (X, Y) combinations, the terminal will select (8, 1) with the larger X value as the standard.

[0167] In yet another example, if the union of MOs set in a terminal operating at 960 kHz matches any of the (X, Y) combinations (4, 1), (8, 1), and (8, 4), the terminal selects X = 8. If the terminal should select the (X, Y) combination, the terminal selects (8, 1) as the reference (X, Y) combination of the bitmap and performs multi-slot monitoring.

[0168] Alternatively, the terminal (and / or the base station) determines that the bitmap is set based on basic X (or the (X, Y) combination including default X or the default (X, Y) combination).

[0169] The above rules may be applied only to a particular SS set type (eg, Group(1) SS), but may also be applied regardless of the type of SS set (ie, including Group(2) SS).

[0170] Meanwhile, when the terminal reports multiple Xs (or (X, Y) combinations) in the period, offset and / or duration set by monitoringSlotPeriodicityAndOffset-r17, if the period, offset and / or duration set by the terminal match two or more Xs (or (X, Y)), the terminal must determine one of these Xs (or (X, Y)) and perform multi-slot monitoring. In this case, the terminal determines that the period, offset and / or duration are set based on the basic X. This rule applies to certain SS set types (especially Group(2) SS).

[0171] 1-(2). duration-r17

[0172] duration-r17 is a parameter for multi-slot monitoring. duration-r17 indicates the duration of the slot (where the MO is located) in which the terminal can actually perform monitoring within the period set based on monitoringSlotPeriodicityAndOffset-r17. The terminal can only perform monitoring for the number of slots set by the duration-r17 parameter after the offset within the period. However, as mentioned above, the SS set type belonging to Group(1) SS restricts the MO position to Y slot within the slot group. If duration-r17 is set in slot units, there is a limit to restricting the MO position to Y slot using only duration-r17. Therefore, the following method is proposed.

[0173] [Definition of duration-r17]

[0174] duration-r17 is defined by the number of consecutive slots in which MO can exist within the period (or the number of consecutive slots that a SearchSpace lasts in every occasion) for the period and offset set in monitoringSlotPeriodicityAndOffset-r17, and means the number of slots after the offset. However, MO can exist only in slots corresponding to a bitmap value of monitoringSlotsWithinSlotGroup-r17 of '1', and the terminal does not perform PDCCH monitoring in slots corresponding to '0'. This restriction is limited to some SS set types (e.g., SS set type corresponding to Group(1) SS) or is commonly applied to all SS set types. In addition, MO is not set in slots that are not set as slots for PDCCH monitoring based on the offset and period even within a slot-group, even if the bitmap bit value of the corresponding monitoringSlotsWithinSlotGroup-r17 is set to '1'. The terminal does not perform PDCCH monitoring operation in slots in which MO is not set.

[0175] [Default value of the parameter “duration-r17”]

[0176] X is used as a base value of duration-r17. That is, if duration-r17 is not provided to the terminal by the RRC configuration for the SS set, X is used as the number of consecutive slots in which MO may exist. If X (or a combination of (X, Y)) for each SCS for multi-slot PDCCH monitoring is separately indicated by the RRC configuration, etc., the set X is the base value of duration-r17. For example, if the RRC configuration for the search space set does not include duration-r17, the terminal assumes or determines that the duration for multi-slot PDCCH monitoring is equal to the set X value. If the RRC configuration for the search space set does not include duration-r17, the terminal performs PDCCH transmission assuming that the duration of the search space set is equal to the set X value. In the present invention, in order to distinguish X of the combination (X, Y) from the set X, X provided by the RRC configuration, etc. may be represented as L. For example, the slot-group size set by the base station to the terminal through RRC configuration, etc. is referred to as L, and the slot-group size according to the combination (X, Y) that the terminal reports to the base station or the combination (X, Y) that the terminal assumes or decides based on its own capabilities is referred to as X. When X set by an instruction such as RRC configuration is referred to as L, L becomes the basic value of duration-r17 in some implementations of the present invention. For example, when the slot-group size set for a search space set for multi-slot PDCCH monitoring is L, the terminal monitors Xp consecutive slots (i.e., k in FIG. 5) within a period given by monitoringSlotPeriodicityAndOffset-r17. sIt is assumed that multi-slot PDCCH monitoring is performed using a search space set in the first L consecutive slots among the L consecutive slots. The base station performs PDCCH transmission using PDCCH candidates of the search space set in these L consecutive slots. If it is specified that the slot-group size is used as the basic value of duration-r17, it is possible to eliminate the possibility that the terminal and the base station will interpret the PDCCH MO differently. In addition, since the (configured) slot-group size for the search space set is the minimum unit of multi-slot PDCCH monitoring for the search space set, in some embodiments of the present invention, there is an advantage in that the burden of PDCCH monitoring on the terminal can be reduced by defining the minimum unit of multi-slot PDCCH monitoring as the basic value of the duration for the search space set.

[0177] Alternatively, the basic value of duration-r17 may be defined for each SCS, regardless of other X indications. For example, the basic value of duration-r17 is defined as "4" for 480 kHz, and the basic value of duration-r17 is defined as "8" for 960 kHz.

[0178] [Maximum valid duration of the parameter "duration-r17"]

[0179] If duration-r17 is set only as a multiple of X for a specific SS set type (e.g., Group(1) SS), the maximum valid duration is defined as "Xp-X". In this case, "X" means "X" set by instruction if X (or (X, Y) combination) for each SCS for multi-slot monitoring is separately specified by RRC configuration, etc. As described above, in this invention, in order to distinguish X of combination (X, Y) from X set, X provided by RRC configuration, etc. is represented as L. For example, the slot-group size set by the base station to the terminal by RRC configuration, etc. is referred to as L, and the slot-group size according to the combination (X, Y) reported by the terminal to the base station or the combination (X, Y) assumed or determined by the terminal based on its own capabilities is referred to as X.

[0180] Alternatively, if there is no indication of another RRC configuration, etc., among the multiple (X, Y) reported as available by the terminal, the terminal operates assuming X that matches the SS set (or MO) configured for the corresponding cell (or BWP or SSSG) (i.e., the size L of the slot-group configured for the SS set or MO (e.g., by the bitmap monitoringSlotsWithinSlotGroup-r17)) or X that has the largest BD / CCE budget. In this case, "Xp-X" is determined using the assumed X.

[0181] Alternatively, regardless of another X indication, the maximum valid period may be defined as "Xp-4" for 480 kHz and "Xp-8" for 960 kHz for each SCS, where Xp means the period set by monitoringSlotPeriodicityAndOffset-r17.

[0182] In some embodiments disclosed in the present invention, the terminal and the base station determine that a value greater than the maximum valid value is not valid when duration-17 is set for the SS set. For example, when monitoringSlotPeriodicityAndOffset-r17=8 and duration-r17=8 or monitoringSlotPeriodicityAndOffset-r17=16 and duration-r17=16 are set for the SS set, the slots that the terminal should monitor for each SCS, for each cell / BWP, or for each SS set may be the same, or a situation may occur where the terminal should monitor all slots for each cell / BWP or for each SS set. This increases the PDCCH blocking probability or increases terminal power consumption because the terminal needs to monitor every slot. According to some embodiments of the present invention, while reducing the PDCCH blocking probability for an SS set, the terminal can suspend monitoring for at least i) the size L of the slot-group set for the SS set, or ii) the size X indicated for the SCS of the corresponding cell, within a period of at least Xp set for the SS, thereby reducing terminal power consumption.

[0183] [3GPP TS 38.331 parameter description]

[0184] Table 9 shows an example of the basic value and maximum valid interval of duration-r17 described in 3GPP TS 38.331.

[0185] [Table 9]

[0186] 1-(3). SS set configurations for DCI format 2_0

[0187] The SS set configuration and operation methods proposed in 1-(1) and 1-(2) can be applied to SS sets associated with all DCI formats. However, in the case of DCI format 2_0, there are different restrictions on period, duration, etc. in Rel-15 / 16, which are different from other DCI formats. Therefore, even for SS set configuration for multi-slot monitoring, a different restriction is required for MO associated with DCI format 2_0.

[0188] [duration-r17 for DCI 2_0]

[0189] In Rel-15 / 16, the duration parameter value is limited to 1 for SS sets associated with DCI format 2_0. This is because the information transmitted by DCI2_0 during one period does not need to be set frequently. For multi-slot monitoring, monitoring is performed on a slot-group basis, and the new parameter duration-r17 for this purpose is also defined to operate as follows.

[0190] - duration-r17 for DCI2_0 is limited to 1 slot (within the configured periodicity).

[0191] - Or duration-r17 for DCI2_0 is limited to X slots (within the configured periodicity).

[0192] That is, no separate duration-r17 is set for DCI2_0, and the duration parameter value is limited to 1 slot (or X slots) within the period set in monitoringSlotPeriodicityAndOffset-r17. If duration-r17 is set for DCI2_0, the terminal operates according to the set duration parameter value instead of the basic operation.

[0193] [monitoringSlotsWithinSlotGroup-r17 for DCI 2_0]

[0194] As with duration-r17, monitoringSlotsWithinSlotGroup-r17, which indicates the MO pattern within a slot-group, is not set for the SS set associated with DCI2_0. In this case, the following description is included in 3GPP TS 38.331.

[0195] -“The UE ignores monitoringSlotsWithinSlotGroup-r17 for DCI format 2_0”

[0196] However, if monitoringSlotsWithinSlotGroup-r17 is set for DCI2_0, the device will operate according to the set bitmap instead of the basic operation described above. In this case, monitoringSlotsWithinSlotGroup-r17 for DCI2_0 is an 8-bit bitmap in which only one bit has a value of "1" and the remaining 7 bits have a value of "0". The basic value of the 8-bit bitmap is "10000000".

[0197] [Monitoring slots for DCI 2_0]

[0198] The monitoring slots for DCI format 2_0 are limited to one slot within the period set by monitoringSlotPeriodicityAndOffset-r17 (similar to Rel-15 / 16). Alternatively, the one slot within the period where MO exists may be further limited to be selected from only Y slots within the slot-group.

[0199] A slot is selected in one of the following ways:

[0200] - The first slot in the period set for DCI2_0 is selected.

[0201] - Select the first Y slot within the period set for DCI2_0.

[0202] Alternatively, in conjunction with monitoringSlotsWithinSlotGroup-r17 and duration-r17, one slot is determined as follows:

[0203] - If monitoringSlotsWithinSlotGroup-r17 is set and duration-r17 is set to 1 slot, the first slot after the offset where monitoringSlotsWithinSlotGroup-r17='1' is determined.

[0204] - If monitoringSlotsWithinSlotGroup-r17 is set and duration-r17 is 4 slots (for 480kHz) or 8 slots (for 960kHz), determine the first slot after the offset where monitoringSlotsWithinSlotGroup-r17='1'

[0205] - If monitoringSlotsWithinSlotGroup-r17 is not set, the first slot among the Y slots of the SS set associated with DCI2_0 that overlap with the Y slot of a SS set other than the SS set associated with DCI2_0 that corresponds to the Group(1) SS set to which the terminal is set is determined.

[0206] A slot with monitoringSlotsWithinSlotGroup-r17='1' means a slot that corresponds to a bit whose value is 1 among bits constituting the bitmap of monitoringSlotsWithinSlotGroup-r17.

[0207] In some implementations, the aforementioned "configured X", "commanded X", "configured Xs", "commanded Xs", "configured slot-group size", or "commanded slot-group size" is determined based on a search space configuration provided to the terminal by the base station.

[0208] Meanwhile, the contents of the present invention are not limited to application to transmission and reception of uplink and / or downlink signals. For example, the contents of the present invention can also be used for direct communication between terminals. Furthermore, the base station in the present invention is not limited to a base station, but is also a concept that includes 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.

[0209] The above-mentioned example of the proposed method is also included as one of the implementation methods of the present invention, and therefore can be regarded as a kind of proposed method. 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 on whether the above-mentioned proposed method is applied (or information on the rules of the proposed method) is specified so that the base station notifies the terminal or the transmitting terminal notifies the receiving terminal by a predetermined signal (e.g., a physical layer signal or a higher layer signal).

[0210] Example

[0211] 6 and 7 are flowcharts of a signal transmission / reception method according to an embodiment of the present invention. In particular, FIG. 6 shows an example of a signal transmission / reception flow in a terminal, and FIG. 7 shows an example of a signal transmission / reception flow in a base station.

[0212] Referring to FIG. 6, some implementations of the present invention are performed by executing instructions stored in a terminal or in a memory in a terminal or in a device for a terminal, or by executing instructions or a program stored in a non-volatile storage medium. The operation of the terminal or the instructions / program is as follows: Receive a search space configuration for a search space set s from a base station (S601). The operation of the terminal or the instructions / program is as follows: Based on the search space configuration, select a search space set s for a predetermined duration (e.g., T s The (multi-slot PDCCH) monitoring is performed for a search space set s only within the (sequential slots) (S603).

[0213] The search space configuration may or may not include parameters related to (multi-slot) PDCCH monitoring according to some embodiments of the present invention. If the search space configuration does not include parameters related to (multi-slot) PDCCH monitoring, default values ​​are used according to some embodiments of the present invention.

[0214] For example, operations by the terminal or instructions / programs may include: receiving a search space configuration for a search space set s for a DL BWP of a cell; and performing PDCCH monitoring for the search space set s on the DL BWP based on the search space configuration.

[0215] In some implementations, the operations by the terminal or instructions / programs include: determining a slot-group size for a search space set s for PDCCH monitoring based on a second parameter.

[0216] In some implementations, the PDCCH monitoring for a search space set s is f *N frame slot +n s、f -o s )mod k s =0, number n f Number n in the frame s、fStarting from the slot where T s in at least one slot in each of one or more consecutive slot-groups, s is the PDCCH monitoring periodicity, and s is the PDCCH monitoring offset, and N frame slot is the number of slots per frame.

[0217] In some implementations, the search space configuration may include: (i) a PDCCH monitoring period k s and PDCCH monitoring offset o s and (ii) a second parameter regarding which slots within the slot-group are configured for PDCCH monitoring.

[0218] In some implementations, a third parameter related to the number of possible consecutive slots in the search space set s is present in the search space configuration. s depends on the third parameter. For example, if the value of the third parameter is T s It is used as.

[0219] In some implementations, based on the absence of a third parameter in the search space setting, T s is equal to L, where L is the size of the slot-group configured for PDCCH monitoring, i.e., in some implementations, the size of the slot-group configured for PDCCH monitoring is used as a default value for the number of possible consecutive slots in the search space set s.

[0220] Referring to FIG. 7, some implementations of the present invention are performed by executing instructions stored in a memory in a base station or in a device for the base station, or by executing instructions or programs stored in a non-volatile storage medium. The operations of the base station or instructions / programs are: Transmit a search space configuration for a search space set s (S701). The operations of the base station or instructions / programs are: Based on the search space configuration, transmit a search space configuration for a predetermined duration (e.g., T s PDCCH transmission is performed using search space set s only within the set of consecutive slots (S703).

[0221] The search space configuration may or may not include parameters related to (multi-slot) PDCCH monitoring according to some embodiments of the present invention. If the search space configuration does not include parameters related to (multi-slot) PDCCH monitoring, default values ​​are used according to some embodiments of the present invention.

[0222] For example, the actions of the base station or instructions / programs may include: transmitting a search space configuration for a search space set s for a DL BWP of the cell; and transmitting a PDCCH based on the search space configuration on the DL BWP.

[0223] In some implementations, the operation by the base station or instructions / programs includes: configuring a slot-group size for the search space set s for PDCCH monitoring in the terminal according to a second parameter.

[0224] In some implementations, in conjunction with the operation of a base station or instructions / programs: A PDCCH transmission with search space configuration is (n f *N frame slot +n s、f -o s )mod k s =0, number n f Number n in the frame s、f Starting from the slot where Ts in at least one slot in each of one or more consecutive slot-groups, s is the PDCCH monitoring periodicity, and s is the PDCCH monitoring offset, and N frame slot is the number of slots per frame.

[0225] In some implementations, in association with the operation of a base station or instructions / programs, the search space setting is: (i) a PDCCH monitoring period k s and PDCCH monitoring offset o s and (ii) a second parameter regarding which slots within the slot-group are configured for PDCCH monitoring.

[0226] In some implementations, in conjunction with the operation of the base station or instructions / programs: based on the presence of a third parameter related to the number of possible consecutive slots of the search space set s in the search space setting, T s depends on the third parameter. For example, if the value of the third parameter is T s It is used as.

[0227] In some implementations, in association with operation by the base station or instructions / programs: based on the absence of a third parameter within the search space configuration, T s is equal to L, where L is the size of the slot-group configured for PDCCH monitoring, i.e., in some implementations, the size of the slot-group configured for PDCCH monitoring is used as a default value for the number of possible consecutive slots in the search space set s.

[0228] In some implementations, the operation of the base station or instructions / programs may include: s、f Starting from slot ks Of consecutive slots, T s The next k after consecutive slots s -T s This includes not transmitting PDCCH based on the search space configuration in these consecutive slots.

[0229] In some implementations, the second parameter is a bitmap of length L.

[0230] In some implementations, the PDCCH monitoring based on the search space configuration or the PDCCH transmission based on the search space configuration is performed based on a subcarrier spacing (SCS) of 480 kHz or a SCS of 960 kHz. For example, the SCS of the DL BWP is 480 kHz SCS or 960 kHz SCS.

[0231] In some implementations, (n f *N frame slot +n s、f -o s )mod k s =0, number n s、f A slot that is 1 is the first slot in one or more consecutive slot-groups.

[0232] In some implementations, the third parameter is a multiple of L.

[0233] In addition to the operations described in relation to FIG. 6 or FIG. 7, one or more of the operations described in relation to FIGS. 1 to 5 and / or 1. above may be further performed in combination.

[0234] An example of a communication system to which the present invention is applied

[0235] Without being limited thereto, the various descriptions, functions, procedures, suggestions, methods and / or flow charts of the present invention disclosed herein may be applied to various fields requiring wireless communication / connection between devices (e.g., 5G).

[0236] Hereinafter, a more detailed description will be given with reference to the drawings. In the following drawings / description, the same reference numerals denote the same or corresponding hardware blocks, software blocks or function blocks, unless otherwise specified.

[0237] FIG. 8 illustrates a communication system 1 to which the present invention is applied.

[0238] Referring to FIG. 8, the communication system 1 applied to the present invention includes wireless devices, base stations, and networks. Here, the wireless devices refer to devices that communicate using wireless connection technology (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, 100b-2, an XR (eXtended Reality) device 100c, a handheld device (Hand-held 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 functions, autonomous vehicles, vehicles capable of inter-vehicle communication, and the like. Here, the vehicles include UAVs (Unmanned Aerial Vehicles) (e.g., drones). XR devices include Augmented Reality (AR) / Virtual Reality (VR) / 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. Portable devices include smartphones, smart pads, wearable devices (e.g., smart watches, smart glasses), computers (e.g., notebook computers, 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.

[0239] The wireless devices 100a to 100f are connected to a network 300 via a base station 200. AI (Artificial Intelligence) technology is applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f 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, the vehicles 100b-1 and 100b-2 can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to everything) communication). Also, an IoT device (e.g., a sensor) can directly communicate with another IoT device (e.g., a sensor) or another wireless device 100a to 100f.

[0240] Wireless communication / connections 150a, 150b, and 150c are performed between the wireless devices 100a to 100f / base stations 200 and the base stations 200. Here, the wireless communication / connections are performed by 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, IAB (Integrated Access Backhaul) (e.g., 5G NR). Through the wireless communication / connections 150a, 150b, and 150c, the wireless devices and base stations, and the base stations and base stations can transmit / receive wireless signals to each other. For example, the wireless communication / connections 150a, 150b, and 150c can transmit / receive signals via various physical channels. To this end, based on 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.

[0241] Examples of wireless devices to which the present invention can be applied

[0242] FIG. 9 illustrates a wireless device to which the present invention can be applied.

[0243] 9, a first wireless device 100 and a second wireless device 200 transmit and receive wireless signals according to 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.

[0244] 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 a first information / signal, and then transmits a wireless signal including the first information / signal via the transceiver 106. The processor 102 also receives a wireless signal including a second information / signal via the transceiver 106, and then stores information obtained from signal processing of the second information / signal 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 performing 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.

[0245] 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 a 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 the 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 performing 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.

[0246] The hardware elements of the wireless device 100, 200 are described in more detail below. One or more protocol layers may be implemented by, but are not limited to, 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, SDAP). 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. 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 may generate and provide 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 to the one or more transceivers 106, 206. The one or more processors 102, 202 may receive signals (e.g., baseband signals) from the one or more transceivers 106, 206 and obtain the PDUs, SDUs, messages, control information, data or information according to the descriptions, functions, procedures, suggestions, methods and / or flowcharts disclosed herein.

[0247] The one or more processors 102, 202 may also be referred to as controllers, microcontrollers, microprocessors, or microcomputers. The one or more processors 102, 202 may be implemented using hardware, firmware, software, or a combination thereof. As an 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 implemented to include modules, procedures, functions, and the like. The 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 run by the one or more processors 102, 202. The descriptions, functions, procedures, suggestions, methods and / or flow charts disclosed herein may be embodied using firmware or software in the form of code, instructions and / or sets of instructions.

[0248] The one or more memories 104, 204 may be coupled to the one or more processors 102, 202 and may store various forms 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.

[0249] One or more transceivers 106, 206 may transmit user data, control information, wireless signals / channels, etc., as described in the methods and / or flow charts, etc., herein to one or more other devices. One or more transceivers 106, 206 may receive user data, control information, wireless signals / channels, etc., as described in the descriptions, functions, procedures, suggestions, methods and / or flow charts, etc., disclosed herein from one or more other devices. For example, one or more transceivers 106, 206 may be coupled to one or more processors 102, 202 and may transmit and receive wireless signals. For example, one or more processors 102, 202 may 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 may control one or more transceivers 106, 206 to receive user data, control information, or wireless signals from one or more other devices. Also, the one or more transceivers 106, 206 are coupled to one or more antennas 108, 208, and the one or more transceivers 106, 206 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 flow charts disclosed herein, via the one or more antennas 108, 208. In this specification, the one or more antennas may be 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 using the one or more processors 102, 202. The one or more transceivers 106, 206 convert the user data, control information, radio signals / channels, etc., processed using the one or more processors 102, 202, from baseband signals to RF band signals. For this purpose, the one or more transceivers 106, 206 include (analog) oscillators and / or filters.

[0250] Examples of use of wireless devices to which this invention can be applied

[0251] 10 shows another example of a wireless device to which the present invention is applied. The wireless device may be embodied in various forms depending on the use case / service (see FIG. 8).

[0252] Referring to Fig. 10, the wireless devices 100, 200 correspond to the wireless devices 100, 200 of Fig. 9 and are composed of various elements, components, units / parts and / or modules. For example, the wireless devices 100, 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, 202 and / or one or more memories 104, 204 in Fig. 9. For example, the transceiver 114 includes one or more transceivers 106, 206 and / or one or more antennas 108, 208 in Fig. 9. The control unit 120 is electrically connected 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 electrical / mechanical operations of the wireless device based on the programs / codes / commands / information stored in the memory unit 130. In addition, the control unit 120 transmits information stored in the memory unit 130 to the outside (e.g., another communication device) via the communication unit 110 through a wireless / wired interface, or stores information received from the outside (e.g., another communication device) via the communication unit 110 through a wireless / wired interface in the memory unit 130.

[0253] 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. The wireless device may be embodied in the form of, but not limited to, a robot (FIG. 8, 100a), a vehicle (FIG. 8, 100b-1, 100b-2), an XR device (FIG. 8, 100c), a mobile device (FIG. 8, 100d), a home appliance (FIG. 8, 100e), an IoT device (FIG. 8, 100f), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a Fintech device (or a financial device), a security device, a climate / environment device, an AI server / device (FIG. 8, 400), a base station (FIG. 8, 200), and a network node. The wireless device may be mobile or fixed depending on the use case / service.

[0254] In FIG. 10, the various elements, components, units / sections and / or modules within the wireless devices 100, 200 are all coupled to each other by wired interfaces or at least some are wirelessly coupled to each other by a communication unit 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 a first unit (e.g., 130, 140) are connected wirelessly via the communication unit 110. In addition, 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 composed of a set of one or more processors. For example, the control unit 120 is composed of 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 composed of a Random Access Memory (RAM), a Dynamic RAM (DRAM), a Read Only Memory (ROM), a flash memory, a volatile memory, a non-volatile memory and / or a combination thereof.

[0255] Examples of vehicles or autonomous vehicles to which the present invention can be applied include

[0256] 11 is a diagram illustrating a vehicle or an autonomous vehicle to which the present invention is applied. The vehicle or the autonomous vehicle may be realized as a mobile robot, a car, a train, an aerial vehicle (AV), a ship, or the like.

[0257] 11, 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 a part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 in FIG. 10, respectively.

[0258] 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, road side 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 run on the ground. The driving unit 140a includes an engine, a motor, a power train, wheels, brakes, a steering device, etc. The power supply unit 140b supplies power to the vehicle or 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, a tilt sensor, a weight 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 embodies a technology for maintaining a lane while driving, a technology for automatically adjusting speed such as an adaptive cruise control, a technology for automatically driving according to a predetermined route, a technology for automatically setting a route when a destination is set, and the like.

[0259] 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 drive plan based on the obtained data. The control unit 120 controls the driving unit 140a (e.g., speed / direction adjustment) so that the vehicle or autonomous driving vehicle 100 moves along the autonomous driving route according to the drive plan. The communication unit 110 non-periodically 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 the drive plan based on the newly obtained data / information. The communication unit 110 transmits information regarding the vehicle position, the autonomous driving route, the drive plan, etc. to the external server. The external server can predict traffic information data in advance using AI technology, etc. based on information collected from the vehicle or autonomous driving vehicle, and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0260] 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 interpreted 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.

[0261] As mentioned above, the present invention can be applied to a variety of wireless communication systems.

Claims

1. A method for monitoring a control channel by a terminal in a wireless communication system, comprising: receiving a search space configuration for a search space set for a downlink (DL) frequency band part (BWP) of a cell; performing physical downlink control channel (PDCCH) monitoring for the search space set on the DL BWP based on the search space configuration; The PDCCH monitoring for the search space set is ｆ *N ｆｒａｍｅ ｓｌｏｔ +n ｓ、ｆ -o ｓ ) mod k ｓ = 0, number n ｆ Number n in the frame ｓ、ｆ Starting from the slot where ｓ at least one slot in each of one or more consecutive slot-groups, where k ｓ is the PDCCH monitoring periodicity, ｓ is the PDCCH monitoring offset, and N ｆｒａｍｅ ｓｌｏｔ is the number of slots per frame, The search space setting is performed by: (i) setting the PDCCH monitoring period k ｓ and the PDCCH monitoring offset o ｓ and (ii) a second parameter regarding which slots within a slot-group are configured for the PDCCH monitoring; The second parameter is a bitmap of length L; based on the presence of a third parameter related to the number of possible consecutive slots of the search space set in the search space setting, T ｓ is based on the third parameter, Based on the third parameter being absent within the search space setting, T ｓ The control channel monitoring method, wherein L is equal to L, where L is the size of a slot-group configured for the PDCCH monitoring.

2. Number n ｓ、ｆ Among the ks consecutive slots starting from the slot where T ｓ The next k after consecutive slots ｓ -T ｓ The method of claim 1 , further comprising not performing the PDCCH monitoring on the search space set for consecutive slots.

3. The method of claim 1, wherein the PDCCH monitoring is performed based on a subcarrier spacing (SCS) of 480 kHz or a SCS of 960 kHz.

4. (n ｆ *N ｆｒａｍｅ ｓｌｏｔ +n ｓ、ｆ -o ｓ ) mod k ｓ = 0, number n ｓ、ｆ 2. The method of claim 1, wherein the slot which is is a first slot in the one or more consecutive slot-groups.

5. The method of claim 1 , wherein the third parameter is set to a multiple of L.

6. A method for monitoring a control channel by a terminal in a wireless communication system, comprising: At least one transceiver; At least one processor; at least one memory operatively connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform operations, said operations including: receiving a search space configuration for a search space set for a downlink (DL) frequency band part (BWP) of a cell; performing physical downlink control channel (PDCCH) monitoring for the search space set on the DL BWP based on the search space configuration; The PDCCH monitoring for the search space set is ｆ *N ｆｒａｍｅ ｓｌｏｔ +n ｓ、ｆ -o ｓ ) mod k ｓ = 0, number n ｆ Number n in the frame ｓ、ｆ Starting from the slot where ｓ at least one slot in each of one or more consecutive slot-groups in the k consecutive slots, where ｓ is the PDCCH monitoring periodicity, ｓ is the PDCCH monitoring offset, and N ｆｒａｍｅ ｓｌｏｔ is the number of slots per frame, The search space setting is performed by: (i) setting the PDCCH monitoring period k ｓ and the PDCCH monitoring offset o ｓ and (ii) a second parameter regarding which slots within a slot-group are configured for the PDCCH monitoring; The second parameter is a bitmap of length L; based on the presence of a third parameter related to the number of possible consecutive slots of the search space set in the search space setting, T ｓ is based on the third parameter, Based on the third parameter being absent within the search space setting, T ｓ is equal to L, where L is the size of the slot-group configured for the PDCCH monitoring.

7. An apparatus for a terminal, comprising: At least one processor; at least one computer memory operatively connected to the at least one processor and which, when executed, causes the at least one processor to perform operations, the operations including: receiving a search space configuration for a search space set for a downlink (DL) frequency band part (BWP) of a cell; performing physical downlink control channel (PDCCH) monitoring for the search space set on the DL BWP based on the search space configuration; The PDCCH monitoring for the search space set is ｆ *N ｆｒａｍｅ ｓｌｏｔ +n ｓ、ｆ -o ｓ ) mod k ｓ = 0, number n ｆ Number n in the frame ｓ、ｆ Starting from the slot where ｓ at least one slot in each of one or more consecutive slot-groups in the k consecutive slots, where ｓ is the PDCCH monitoring periodicity, ｓ is the PDCCH monitoring offset, and N ｆｒａｍｅ ｓｌｏｔ is the number of slots per frame, The search space setting is performed by: (i) setting the PDCCH monitoring period k ｓ and the PDCCH monitoring offset o ｓ and (ii) a second parameter regarding which slots within a slot-group are configured for the PDCCH monitoring; The second parameter is a bitmap of length L; based on the presence of a third parameter related to the number of possible consecutive slots of the search space set in the search space setting, T ｓ is based on the third parameter, Based on the third parameter being absent within the search space setting, T ｓ The apparatus, wherein: Σ(t) is equal to L, where L is the size of a slot-group configured for the PDCCH monitoring.

8. A computer readable non-volatile storage medium containing at least one computer program causing at least one processor to perform operations, said operations including: receiving a search space configuration for a search space set for a downlink (DL) frequency band part (BWP) of a cell; performing physical downlink control channel (PDCCH) monitoring for the search space set on the DL BWP based on the search space configuration; The PDCCH monitoring for the search space set is ｆ *N ｆｒａｍｅ ｓｌｏｔ +n ｓ、ｆ -o ｓ ) mod k ｓ = 0, number n ｆ Number n in the frame ｓ、ｆ Starting from the slot where ｓ at least one slot in each of one or more consecutive slot-groups in the k consecutive slots, where ｓ is the PDCCH monitoring periodicity, ｓ is the PDCCH monitoring offset, and N ｆｒａｍｅ ｓｌｏｔ is the number of slots per frame, The search space setting is performed by: (i) setting the PDCCH monitoring period k ｓ and the PDCCH monitoring offset o ｓ and (ii) a second parameter regarding which slots within a slot-group are configured for the PDCCH monitoring; The second parameter is a bitmap of length L; based on the presence of a third parameter related to the number of possible consecutive slots of the search space set in the search space setting, T ｓ is based on the third parameter, Based on the third parameter being absent within the search space setting, T ｓ is equal to L, where L is the size of a slot-group configured for the PDCCH monitoring.

9. A method for transmitting a control channel by a base station in a wireless communication system, comprising: transmitting a search space configuration for a search space set for a downlink (DL) frequency band part (BWP) of a cell; transmitting a physical downlink control channel (PDCCH) based on the search space configuration on the DL BWP; The PDCCH transmission based on the search space setting is ｆ *N ｆｒａｍｅ ｓｌｏｔ +n ｓ、ｆ -o ｓ ) mod k ｓ = 0, number n ｆ Number n in the frame ｓ、ｆ Starting from the slot where ｓ at least one slot in each of one or more consecutive slot-groups in the k consecutive slots, where ｓ is the PDCCH monitoring periodicity, ｓ is the PDCCH monitoring offset, and N ｆｒａｍｅ ｓｌｏｔ is the number of slots per frame, The search space setting is performed by: (i) setting the PDCCH monitoring period k ｓ and the PDCCH monitoring offset o ｓ and (ii) a second parameter regarding which slots within the slot-group are configured for PDCCH monitoring; The second parameter is a bitmap of length L; based on the presence of a third parameter related to the number of possible consecutive slots of the search space set in the search space setting, T ｓ is based on the third parameter, Based on the third parameter being absent within the search space setting, T ｓ The control channel transmission method, wherein L is equal to L, where L is the size of a slot-group configured for the PDCCH monitoring.

10. A base station for transmitting a control channel in a wireless communication system, comprising: At least one transceiver; At least one processor; at least one memory operatively connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform operations, said operations including: transmitting a search space configuration for a search space set for a downlink (DL) frequency band part (BWP) of a cell; transmitting a physical downlink control channel (PDCCH) based on the search space configuration on the DL BWP; The PDCCH transmission based on the search space setting is ｆ *N ｆｒａｍｅ ｓｌｏｔ +n ｓ、ｆ -o ｓ ) mod k ｓ = 0, number n ｆ Number n in the frame ｓ、ｆ Starting from the slot where ｓ at least one slot in each of one or more consecutive slot-groups in the k consecutive slots, where ｓ is the PDCCH monitoring periodicity, ｓ is the PDCCH monitoring offset, and N ｆｒａｍｅ ｓｌｏｔ is the number of slots per frame, The search space setting is performed by: (i) setting the PDCCH monitoring period k ｓ and the PDCCH monitoring offset o ｓ and (ii) a second parameter regarding which slots within a slot-group are configured for the PDCCH monitoring; The second parameter is a bitmap of length L; based on the presence of a third parameter related to the number of possible consecutive slots of the search space set in the search space setting, T ｓ is based on the third parameter, Based on the third parameter being absent within the search space setting, T ｓ is equal to L, where L is the size of the slot-group configured for the PDCCH monitoring.

11. Number n ｓ、ｆ Starting from the slot where ｓ Among the consecutive slots, ｓ The next k after consecutive slots ｓ -T ｓ The base station of claim 10, further comprising: not transmitting a PDCCH based on the search space configuration in consecutive slots.

12. The base station according to claim 10, wherein the PDCCH transmission based on the search space configuration is performed based on a subcarrier spacing (SCS) of 480 kHz or a SCS of 960 kHz.

13. (n ｆ *N ｆｒａｍｅ ｓｌｏｔ +n ｓ、ｆ -o ｓ ) mod k ｓ = 0, number n ｓ、ｆ The base station of claim 10, wherein the slot which is is a first slot in the one or more consecutive slot-groups.

14. The base station of claim 10 , wherein the third parameter is set to a multiple of L.

Images