User terminal and wireless communication method

Abstract

In order to properly notify information of a set area of ​​a control channel in a wireless communication system using a synchronization signal block, a user terminal is characterized in that it has: a receiving unit that receives a synchronization signal block, wherein the synchronization signal block includes bit information related to the structure of a control resource set; and a control unit that controls the determination of the structure of the control resource set based on structure information associated with the bit information in a structure information set, wherein the structure information set is associated with indication information based on the reception.

Description

Technical Field

[0001] The present invention relates to a user terminal and a wireless communication method in a next generation mobile communication system. Background Art

[0002] In the UMTS (Universal Mobile Telecommunications System) network, Long Term Evolution (LTE) has been standardized for the purpose of further high-speed data rates and low latency (Non-Patent Document 1). In addition, LTE-A (LTE-Advanced, LTE Rel. 10, 11, 12, 13) has been standardized for the purpose of further increasing the capacity and sophistication of LTE (LTE Rel. 8, 9).

[0003] The subsequent systems of LTE (also called Future Radio Access (FRA), fifth generation mobile communication system (5G), 5G+(plus), NR (New Radio), NR (New radio access), FX (Future generation radio access), LTE Rel.14 or 15 and later, etc.) are also discussed.

[0004] In existing LTE systems (e.g., LTE Rel. 8 to 13), a user terminal (UE: User Equipment) detects synchronization signals (primary synchronization signal (PSS: Primary Synchronization Signal) and / or secondary synchronization signal (SSS: Secondary Synchronization Signal)) through an initial connection (initial access) process (also called cell search, etc.), synchronizes with a network (e.g., a wireless base station (eNB (eNode B))), and identifies the cell to be connected (e.g., identified by a cell ID (Identifier)).

[0005] In addition, after searching the cell, the user terminal receives the master information block (MIB: Master Information Block) sent through the broadcast channel (Physical Broadcast Channel (PBCH: Physical Broadcast Channel)), the system information block (SIB: System Information Block) sent through the downlink (DL) shared channel (Physical Downlink Shared Channel (PDSCH: Physical Downlink Shared Channel)), etc., and obtains the setting information used for communication with the network (also called broadcast information, system information, etc.).

[0006] Prior art literature

[0007] Non-patent literature

[0008] Non-patent document 1: 3GPP TS 36.300 "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall Description; Stage 2" Summary of the invention

[0009] Problems to be solved by the invention

[0010] It is being discussed that in future wireless communication systems (e.g., NR or 5G), a resource unit including a synchronization signal and a broadcast channel is defined as a synchronization signal block, and an initial connection is made based on the SS block. The synchronization signal is also called PSS and / or SSS, or NR-PSS and / or NR-SSS, etc. The broadcast channel is also called PBCH or NR-PBCH, etc. The synchronization signal block is also called SS block (Synchronization Signal block), or SS / PBCH block, etc.

[0011] In the initial connection using the SS block, the NR-PBCH constituting the SS block is used to notify the UE of information related to the area where the downlink control channel is set. The setting area of ​​the downlink control channel (NR-PDCCH: Physical Downlink Control Channel) is also called a control resource set (CORESET: Control Resource Set), a control resource set, a control subband (Control Subband), a search space set, a search space resource set, a control area, a control subband, or an NR-PDCCH area.

[0012] However, it has not been decided how to include information related to the setting area of ​​the downlink control channel (also called CORESET configuration, CORESET information, etc.) in the NR-PBCH and notify the UE. In addition, it has not been decided how to notify the allocation area of ​​data through the downlink control channel included in the setting area of ​​the downlink control channel.

[0013] The present invention has been made in view of this point, and one of its objects is to provide a user terminal and a wireless communication method that can appropriately notify information on a setting area of ​​a control channel in a wireless communication system using a synchronization signal block.

[0014] Means for solving problems

[0015] A user terminal according to one embodiment of the present invention is characterized in that it comprises: a receiving unit for receiving a synchronization signal block, wherein the synchronization signal block includes bit information related to the structure of a control resource set; and a control unit for controlling a determination of the structure of the control resource set based on structure information associated with the bit information in a structure information set, wherein the structure information set is associated with indication information based on the reception.

[0016] Effects of the Invention

[0017] According to the present invention, in a wireless communication system using a synchronization signal block, information on a setting area of ​​a control channel can be appropriately notified. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A as well as Figure 1B This is a diagram showing an example of an SS burst set.

[0019] Figure 2A as well as Figure 2B This is a diagram showing an example of a plurality of RMSI CORESET structure tables that differ according to the frequency band of the SS block.

[0020] Figure 3A to Figure 3C This is a diagram showing an example of CORESET mapping when SS blocks and RMSI CORESETs are TDMed and different CORESET time widths are set according to RMSI CORESET configuration bit information.

[0021] Figure 4A to Figure 4C This is a diagram showing an example of CORESET mapping when SS blocks and RMSI CORESETs are TDMed and different CORESET bandwidths are set according to RMSI CORESET configuration bit information.

[0022] Figure 5A to Figure 5C This is a diagram showing an example of mapping when the SS block and the RMSI CORESET are subjected to FDM and different CORESET time widths are set according to the CORESET structure bit information.

[0023] Figure 6A to Figure 6C This is a diagram showing an example of CORESET mapping when SS blocks and RMSI CORESETs are FDMed and different CORESET bandwidths are set according to CORESET configuration bit information.

[0024] Fig. 7A as well as Figure 7B This is a diagram showing an example of an RMSI CORESET structure table including a CORESET mapping type.

[0025] Figure 8A to Figure 8C This diagram shows an example of the mapping type of the SS block and the RMSI CORESET when FDM is performed on the CORESET.

[0026] Figures 9A to 9C This diagram shows an example of the type of mapping of CORESET when TDM is performed between the SS block and the RMSI CORESET.

[0027] Fig.10 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment of the present invention.

[0028] Fig.11 This is a diagram showing an example of the overall configuration of a wireless base station according to an embodiment of the present invention.

[0029] Fig.12 This is a diagram showing an example of a functional configuration of a wireless base station according to an embodiment of the present invention.

[0030] Fig.13 This is a diagram showing an example of the overall configuration of a user terminal according to an embodiment of the present invention.

[0031] Fig.14 This is a diagram showing an example of a functional configuration of a user terminal according to an embodiment of the present invention.

[0032] Fig.15 This is a diagram showing an example of the hardware configuration of a wireless base station and a user terminal according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] It is being discussed to define a signal block (also called SS / PBCH block, SS / PBCH block, etc.) including a synchronization signal (also called SS, PSS and / or SSS, or, NR-PSS and / or NR-SSS, etc.) and a broadcast channel (also called a broadcast signal, PBCH, or NR-PBCH, etc.) in a future wireless communication system (for example, after LTE Rel.14, 5G or NR, etc.), and a collection of more than one signal block may also be called a signal burst (SS / PBCH burst or SS burst). Multiple signal blocks in the signal burst are transmitted through different beams at different times (also called beam sweep, etc.).

[0034] The SS / PBCH block is composed of one or more symbols (e.g., OFDM symbols). Specifically, the SS / PBCH block can be composed of multiple consecutive symbols. In the SS / PBCH block, the PSS, SSS, and NR-PBCH can be respectively configured in one or more different symbols. For example, for the SS / PBCH block, it is also discussed that the SS / PBCH block is composed of 4 or 5 symbols including 1 symbol of PSS, 1 symbol of SSS, and 2 or 3 symbols of PBCH.

[0035] A collection of one or more SS / PBCH blocks may also be referred to as an SS / PBCH burst. An SS / PBCH burst may be composed of SS / PBCH blocks with continuous frequency and / or time resources, or may be composed of SS / PBCH blocks with non-continuous frequency and / or time resources. An SS / PBCH burst may be set at a specified period (also referred to as an SS / PBCH burst period), or may be set aperiodically.

[0036] In addition, one or more SS / PBCH bursts may also be referred to as SS / PBCH burst sets (SS / PBCH burst series). SS / PBCH burst sets are periodically set. The user terminal may assume that SS / PBCH burst sets are periodically sent (with SS / PBCH burst set periodicity) to control reception processing.

[0037] FIG. 1 is a diagram showing an example of an SS burst set. Figure 1A An example of beam scanning is shown in FIG. Figure 1A as well as Figure 1B As shown, the wireless base station (e.g., gNB) can change the directionality of the beam over time (beam scanning), thereby using different beams to send different SS blocks. Figure 1A as well as Figure 1B In FIG, an example of using multiple beams is shown, but a single beam can also be used to send SS blocks.

[0038] like Figure 1B As shown in FIG. 1 , an SS burst is composed of one or more SS blocks, and an SS burst set is composed of one or more SS bursts. Figure 1B In the example, the SS burst is composed of 8 SS blocks #0 to #7, but the present invention is not limited thereto. SS blocks #0 to #7 can be transmitted through different beams #0 to #7 ( Figure 1A ) to send.

[0039] like Figure 1B As shown, the SS burst set including SS blocks #0 to #7 is transmitted for no longer than a prescribed period (e.g., less than 5 ms, also referred to as the SS burst set period, etc.). In addition, the SS burst set may be repeated at a prescribed period (e.g., 5, 10, 20, 40, 80 or 160 ms, also referred to as the SS burst set period, etc.).

[0040] In addition, Figure 1B In the example, there are prescribed time intervals between SS blocks #1 and #2, #3 and #4, #5 and #6, respectively, but there may be no such time interval, and the time interval may also be set between other SS blocks (for example, between SS blocks #2 and #3, #5 and #6, etc.). In this time interval, for example, a DL control channel (also called PDCCH, NR-PDCCH or downlink control information (DCI: Downlink Control Information)) may be sent, and / or a UL control channel (Physical Uplink Control Channel (PUCCH: Physical Uplink Control Channel)) may also be sent from a user terminal. For example, when each SS block is composed of 4 symbols, a time slot of 14 symbols may also include a PDCCH of 2 symbols and 2 SS blocks, a PUCCH of 2 symbols, and a protection time.

[0041] In addition, the PBCH (or DMRS for PBCH: Demodulation Reference Signal, PBCH DMRS) included in the SS block is used to notify the index of the SS block (SS block index). Based on the PBCH (or PBCH DMRS), the UE can know the SS block index of the received SS block.

[0042] In addition, the wireless base station is discussing notifying the UE of information about the area where the downlink control channel (PDCCH) is configured using the PBCH. The information about the area where the PDCCH is configured may also be referred to as a control resource set configuration (CORESET configuration), a control resource set configuration, or a PDCCH configuration.

[0043] In addition, it is being discussed that wireless base stations use PDCCH to schedule system information (for example, RMSI (Remaining Minimum System Information)). A portion of the MSI (Minimum System Information) read by the UE at the time of initial access is carried through the PBCH. The remaining MSI is RMSI, similar to SIB (System Information Block) 1 and SIB2 in LTE. RMSI can be broadcast through a single TB or divided into multiple TBs. At this time, the divided RMSI can be called NR-SIB1 and NR-SIB2.

[0044] Here, RMSI is described.

[0045] One DL parameter set (Numerology) is applied to RMSI, paging, message 2 (Msg.2) and message 4 (Msg.4) for initial access, and broadcast OSI (Other system information). Broadcast OSI is system information other than MSI and may be broadcasted through PDCCH or the like.

[0046] NB-PBCH carries 1 bit of parameter set information. For example, for a frequency of 6 GHz, the parameter set information indicates a subcarrier spacing of 15 kHz or 30 kHz. For RMSI and paging, the same subcarrier spacing is used for the data channel and the control channel.

[0047] The PDSCH for transmitting RMSI is limited to the initial active DL BWP (Bandwidth Part). BWP is one or more frequency bands (partial bands) within a carrier (component carrier (CC) or system band, etc.) used for DL ​​and / or UL communication. The initial active DL BWP is the DLBWP set at the time of initial access.

[0048] RMSI can be common to all beams. All RACH (Random Access Channel) structure information is broadcast in all RMSI beams in the cell. RMSI contains at least a list of PLMN (Public Land Mobile Network), cell ID, cell camping parameters, and RACH parameters.

[0049] The UE receives the PDCCH based on the control resource set structure notified through the PBCH, receives the PDSCH (Physical Downlink Shared Channel) scheduled by the PDCCH, and acquires the RMSI in the PDSCH.

[0050] The UE uses a window (RMSI PDCCH monitoring window) for monitoring the PDCCH (RMSI PDCCH) for scheduling RMSI. The RMSI PDCCH monitoring window is associated with the SS block. The RMSI PDCCH monitoring window is repeated periodically. That is, the RMSI PDCCH monitoring window indicates the timing at which the UE reads the RMSI.

[0051] Each RMSI PDCCH monitoring window has a time width of x consecutive time slots. The period y of the monitoring window may be the same as or different from the period of the SS burst set.

[0052] There is no specific decision on the content of the control resource set structure to be included in the PBCH and notified, so how to set the specific notification method of the control resource set structure (number of bits and content, etc.) and notify the UE has become a problem.

[0053] Since the resources applicable to PBCH are also limited, it is desirable to suppress the payload in PBCH to the necessary minimum, increase redundancy and improve the detection rate, and suppress the setting range and / or granularity of the control resource set structure.

[0054] In the case of low frequency bands (low frequency bands, for example, less than 6 GHz, also referred to as sub6), the number of applied beams is also small compared to high frequency bands (for example, above 6 GHz, also referred to as millimeter wave (mmW)). In addition, if multi-beams are considered for high frequency bands, it is desirable to set the control resource set structure over a wide range and / or with fine granularity.

[0055] The contents (parameters) of the control resource set structure notified by using the PBCH include the bandwidth (BW), period (e.g., number of symbols), start timing, and frequency position of the control resource set. At least one of the contents is notified by using the bit information included in the PBCH.

[0056] When notifying part or all of the bandwidth, period, start timing, and frequency position of a control resource set, consider defining a table that associates the bit information included in the PBCH with the content of the control resource set structure. The UE can determine the control resource set structure based on the bit information included in the PBCH and the pre-set table, and receive the downlink control channel sent through the control resource set.

[0057] For example, consider defining a table that specifies the control resource set structure corresponding to the bit information included in the PBCH. In this case, regardless of the subcarrier spacing (SCS) and / or frequency band used in the transmission of the SS block, the control resource set structure can be notified through the bit information using a common table.

[0058] The structural information (configuration) required for the CORESET (RMSI CORESET) for RMSI scheduling is studied, and is explicitly notified through the PBCH payload, but the PBCH payload is limited. On the other hand, in order to flexibly set the RMSI CORESET, it is expected to be able to set a large number of parameters such as the time position, frequency position, time width, bandwidth, and multiplexing method with SS blocks of the RMSI CORESET.

[0059] The inventors of the present invention discussed a method of flexibly setting CORESET by utilizing limited notification bits within PBCH, thereby completing the present invention.

[0060] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the embodiments may be applied individually or in combination.

[0061] (First method)

[0062] The PBCH includes RMSI CORESET configuration bit information (may also be referred to as a bit field). The radio base station reduces the amount of information required to notify the RMSI CORESET configuration by jointly encoding a plurality of parameters (configuration information) related to the RMSI CORESET configuration.

[0063] The UE may use different tables (RMSI CORESET structure tables) according to the indication information obtained explicitly and / or implicitly when receiving the SS block (SS and PBCH). Multiple RMSI CORESET structure tables may also be specified by the specification.

[0064] For example, it is possible to imagine different RMSI CORESET structure tables depending on the parameter set (e.g., subcarrier spacing) of the SS. In addition, it is also possible to imagine different RMSI CORESET structure tables depending on the frequency band (e.g., frequency band higher or lower than the specified frequency, frequency band number) of the SS.

[0065] It is also possible to imagine different RMSI CORESET configuration tables depending on the frequency band of the SS. In other words, the UE and the radio base station can switch the RMSI CORESET configuration table according to the information associated with the frequency band.

[0066] It is also possible to imagine different RMSI CORESET configuration tables depending on the parameter set of the RMSI CORESET. In other words, the UE and the radio base station can switch the RMSI CORESET configuration table based on the information associated with the parameter set.

[0067] The indication information may also be based on at least one of SS, PBCH, and PBCH DMRS in the received SS block.

[0068] The indication information may also be information based on the SS. For example, the indication information may include at least one of a frequency band (eg, a frequency band higher or lower than a specified frequency, a frequency band number) of the SS, a parameter set (eg, a subcarrier spacing), and a cell ID of the SS.

[0069] The indication information may also be information based on PBCH. For example, the indication information may also include at least one of the following: system frame number (SFN), half radio frame timing indication, SS block frequency offset indication, CORESET structure, RMSI, paging, and parameter sets of messages 2 and 4, information on the initial DMRS position, and information for quickly classifying (identifying) the situation where the UE is not resident in a cell or carrier.

[0070] The indication information may also be information based on the PBCH DMRS. For example, the indication information may include an SS block index.

[0071] As shown in FIG. 2 , the RMSI CORESET structure table associates a plurality of parameters with bit information (RMSI CORESET structure bit information, bit field) representing the RMSI CORESET structure.

[0072] PBCH contains RMSI CORESET structure bit information.

[0073] The UE may identify the RMSI CORESET structure using the parameter corresponding to the RMSI CORESET structure bit information in the RMSI CORESET structure table corresponding to the indication information. The UE monitors the PDCCH in the CORESET indicated by the identified RMSI CORESET structure, thereby decoding the RMSI scheduled by the PDCCH.

[0074] The RMSI CORESET structure table may also include at least one parameter of the frequency resource information of the CORESET, the time resource information of the CORESET, the type of DMRS mapping (DMRS mapping type), and other associated parameters.

[0075] The information of the frequency resources of the CORESET may be at least one of a CORESET bandwidth (for example, represented by the number of RBs) and a CORESET frequency position (for example, represented by a frequency offset relative to an SS block).

[0076] The information of the time resource of CORESET may be at least one of information indicating a set of consecutive OFDM symbol indices in the time slot corresponding to CORESET and CORESET time width (duration, for example, the number of symbols of CORESET).

[0077] The DMRS mapping type may indicate one of the cases where the DMRS is mapped to all REGs in the carrier (also referred to as broadband) and the case where the DMRS is mapped to the CORESET (also referred to as CORESET). In addition, the DMRS mapping type may also indicate the case where the DMRS is mapped to a BWP (Bandwidth Part).

[0078] Other associated parameters may also be an RMSI timing structure indicating the timing of the RMSI. The RMSI timing structure may be at least one of an RMSI PDCCH monitoring window period, an RMSI PDCCH monitoring window width, and an RMSI PDCCH monitoring window offset.

[0079] In the example of FIG. 2 , the UE and the wireless base station use different multiple RMSI CORESET structure tables according to the frequency band of the SS block. For example, the RMSI CORESET structure table associated with the sub6 band (below 6 GHz) is used ( Figure 2A ), and the RMSI CORESET structure table associated with the mmW band (above 6GHz) ( Figure 2B ).

[0080] Each entry in the RMSI CORESET structure table includes the following fields: RMSI CORESET structure bit information, SS block and RMSI CORESET multiplexing mode, DMRS mapping type, CORESET bandwidth, and CORESET duration. The length of the CORESET structure bit information here is 8 bits.

[0081] In the sub6 band, the number of beams is small and the time required for beam scanning is short compared to the mmW band, so there are cases where time resources for TDM of the SS block and CORESET can be secured. In the mmW band, the number of beams is large and the time required for beam scanning is long compared to the sub6 band, so the time resources of the SS block and CORESET are limited, so there are cases where it is preferred to perform FDM on the SS block and CORESET. In the example of Figure 2, TDM is performed on the SS block and CORESET in the sub6 band, and FDM is performed on the SS block and CORESET in the mmW band.

[0082] When TDM is performed between the SS block and the CORESET, the frequency resources available for the CORESET may be larger than when FDM is performed between the SS block and the CORESET. In the example of FIG2 , the CORESET bandwidth in the mmW band is limited to a specified value (24 RBs), and the CORESET bandwidth in the sub6 band can be set to a value greater than the specified value.

[0083] When the SS block and the CORESET are FDMed, the time resources available for the CORESET may be larger than when the SS block and the CORESET are TDMed. In the example of FIG2 , the CORESET time width in the sub6 band is limited to a specified value (1 symbol), and the CORESET time width in the mmW band can be set to a value greater than the specified value.

[0084] By using the CORESET structure bit information to set the duration and / or bandwidth of the RMSI CORESET, the quality of the RMSI CORESET can be ensured.

[0085] By jointly encoding multiple parameters associated with the RMSI CORESET structure, the amount of information required to notify the RMSI CORESET structure is suppressed, and the RMSI CORESET structure can be flexibly set. The UE and the wireless base station use the RMSI CORESET structure table to suppress the amount of information required to notify the RMSI CORESET structure, and can cooperate with the recognition of the RMSI CORESET structure. In addition, the RMSI CORESET structure table that differs according to the frequency band indicates different multiplexing methods, so that the multiplexing method suitable for the frequency band can be used. In addition, the RMSI CORESET structure table indicates the DMRS mapping type, so that the configuration of the DMRS suitable for the RMSI CORESET can be used.

[0086] The UE uses different RMSI CORESET structure tables according to the indication information obtained explicitly or implicitly through reception of the SS block, so that the RMSI CORESET can be flexibly set even if the length of the RMSI CORESET structure bit information is limited. In addition, the RMSI CORESET structure table is selected according to the indication information, so that the RMSI CORESET structure can be determined regardless of the relationship between the parameter set of the SS block and the parameter set of the RMSI CORESET. In addition, the UE and the wireless base station select the RMSI CORESET structure table according to the indication information, so that the RMSI CORESET structure suitable for the situation can be used.

[0087] The entry of the RMSI CORESET structure table may also be the structure information of the RMSI CORESET. The RMSI CORESET structure table may also be a collection of structure information.

[0088] (Second method)

[0089] The second aspect shows a method of setting the mapping of RMSI CORESET.

[0090] The UE and the wireless base station may also determine the mapping (configuration) of the RMSI CORESET based on the indication information, the RMSI CORESET structure bit information, and the RMSI CORESET structure table. For example, a mapping associated with specific information such as the frequency band of the SS block and / or RMSI CORESET, the parameter set of the SS block and / or RMSI CORESET, and the multiplexing method of the SS block and the RMSI CORESET is pre-set, and the UE and the wireless base station may determine the mapping corresponding to the specific information for the RMSI CORESET.

[0091] The mapping of RMSI CORESET may also be the relative position of RMSI CORESET relative to the position of SS block (time resources and / or frequency resources).

[0092] The RMSI CORESET structure table may also include parameters (fields) indicating the mapping of the RMSI CORESET. The UE may also determine the mapping of the RMSI CORESET based on information obtained from at least one of the designated information, the RMSI CORESET structure bit information, and the RMSI CORESET structure table. For example, the UE may also calculate the relative position of the RMSI CORESET with respect to the SS block using the parameters obtained from the RMSI CORESET structure table and a prescribed formula.

[0093] The RMSI CORESET structure table contains information indicating mapping of the RMSI CORESET, thereby being able to more flexibly notify the CORESET structure even if the length of the RMSI CORESET structure bit information is limited.

[0094] FIG. 3 and FIG. 4 show an example of mapping of CORESET when the frequency band is a sub6 band and the SS block and the CORESET are TDMed.

[0095] In symbols #0 to #13 in one time slot, SS block #0 is transmitted in symbols #2 to #5, and SS block #1 is transmitted in symbols #8 to #11. No SS block is transmitted in the first two symbols (symbols #0 to #1) of the time slot (before SS block #0). In addition, no SS block is transmitted in the two symbols (symbols #6 to #7) immediately after SS block #0 (before SS block #1).

[0096] FIG3 shows an example of mapping of CORESET when SS block and CORESET are TDMed and different CORESET time widths are set according to CORESET structure bit information. Here, the bandwidth of CORESET is equal to the bandwidth of SS block. Here, the bandwidth of CORESET is the same as the bandwidth of SS block, and the center frequency of CORESET is the same as the center frequency of SS block.

[0097] Figure 3A , Figure 3B , Figure 3C They respectively represent the cases where the CORESET time width is 1 code element, 2 code elements, and 3 code elements.

[0098] In such Figure 3A As shown in the figure, the CORESET time width is 1 symbol, and Figure 3BAs shown, when the CORESET duration is 2 symbols, CORESET#0 is mapped to the beginning of the slot (symbols #0 to #1), and CORESET#1 is mapped immediately after SS block (SSB) #0 (symbols #6 to #7).

[0099] In such Figure 3C As shown, when the CORESET duration is 3 symbols, CORESET#0 is mapped to the beginning of the slot. To avoid overlapping with CORESET#0, SS block #0 is truncated. In addition, to prevent overlapping with SS block #1, CORESET#1 is not mapped. Thus, only CORESET#0 and SS block #1 are mapped.

[0100] The UE can determine whether an SS block is actually sent (it can also determine whether an SS block with a specific SS block index is actually sent) based on at least one of the indication information, the RMSI CORESET structure bit information, and the RMSI CORESET structure table.

[0101] At the time point when the UE finds the initial SS block, it cannot identify whether there are other SS blocks in the time slot. For example, when the UE demodulates the PBCH, if it is identified that the CORESET and SS blocks of 3 code elements are TDMed based on the indication information, the RMSI CORESET structure bit information in the PBCH, and the RMSICORESET structure table, it can be identified that there is no SS block at the position of SS block #0.

[0102] In other words, the UE may not consider the scenario of a CORESET with SS block #0 and 3 symbols. In addition, when the CORESET width is greater than the specified value, the interpretation of the position of the SS block will change compared to the case where the CORESET width is less than the specified value. In addition, the UE may not assume the scenario of overlapping CORESET and SS blocks.

[0103] Figure 4 shows that Figure 2A In the same scenario, an example of CORESET mapping is shown in which the SS block and the RMSI CORESET are TDMed and different CORESET bandwidths are set according to the RMSICORESET structure bit information. Here, the center frequencies of the SS block and the CORESET are equal. The bandwidth of the SS block is 24 RBs. The time width of the CORESET is 2 symbols.

[0104] Figure 4A , Figure 4B , Figure 4C They respectively represent the cases where the CORESET bandwidth is 24 RBs, 48 ​​RBs, and 96 RBs.

[0105] In the examples of FIG. 5 and FIG. 6 , for example, the frequency band is the mmW band, and the SS block and the CORESET are FDMed. Here, the band of the CORESET is adjacent to the band of the SS block, and the frequency of the CORESET is higher than the frequency of the SS block. The first symbol of the CORESET is equal to the first symbol of the SS block.

[0106] Figure 5 shows that Figure 2B In the same scenario, an example of mapping is shown in which the SS block and the RMSI CORESET are FDMed and different CORESET time widths are set according to the CORESET configuration bit information. Here, the SS block and the CORESET have the same bandwidth.

[0107] Figure 5A , Figure 5B , Figure 5C They respectively represent the cases where the CORESET time width is 1 code element, 2 code elements, and 3 code elements.

[0108] Fig. 6 shows an example of CORESET mapping when the SS block and the RMSI CORESET are FDMed and different CORESET bandwidths are set according to the CORESET configuration bit information. Here, the bandwidth of the SS block is 24 RBs.

[0109] Fig. 6A , Figure 6B , Figure 6C They respectively represent the cases where the CORESET bandwidth is 24 RBs, 48 ​​RBs, and 96 RBs.

[0110] As shown in Fig. 7, each entry in the RMSI CORESET structure table may also include a field for the type of CORESET mapping (CORESET mapping type). The CORESET mapping type may also indicate one of a plurality of pre-set CORESET mapping types.

[0111] The pre-set multiple CORESET mapping types may also be different according to the multiplexing method. Fig. 7A As shown in FIG. 1 , in the RMSI CORESET structure table associated with the sub6 band, since the multiplexing mode is TDM, the CORESET mapping type indicates one of the multiple CORESET mapping types used for TDM. Figure 7B As shown, in the RMSICORESET structure table associated with the mmW band, since the multiplexing mode is FDM, the CORESET mapping type indicates one of a plurality of CORESET mapping types used for FDM.

[0112] An example of CORESET mapping type when FDM is performed between SS blocks and RMSI CORESET is shown in Fig. 8. Here, the band of CORESET is adjacent to the band of SS blocks.

[0113] Here, the case where the bandwidth of CORESET is the same as the bandwidth of SS block is shown, but it can also be different from the bandwidth of SS block.

[0114] like Fig. 8A As shown in Figure 1, in FDM's CORESET mapping type 1, the frequency of the CORESET is higher than the frequency of the SS block. Figure 8B As shown, in the CORESET mapping type 2 of FDM, the frequency of the CORESET is lower than the frequency of the SS block. Figure 8C As shown, in the CORESET mapping type 3 of FDM, the CORESET is divided into two bands with half the bandwidth, and these two bands are adjacent to the band of the SS block on both sides.

[0115] FIG9 shows an example of a CORESET mapping type when the SS block and the RMSI CORESET are TDMed. Here, the band of the CORESET is equal to the band of the SS block. That is, the bandwidth of the CORESET is equal to the bandwidth of the SS block, and the center frequency of the CORESET is equal to the center frequency of the SS block. The CORESET duration is 1 symbol.

[0116] Here, the case where the frequency position (bandwidth and center frequency) of CORESET is equal to the frequency position of the SS block is shown, but it can also be different from the frequency position (bandwidth and / or center frequency) of the SS block.

[0117] During the time slot, the period (time resource) during which the SS block is not transmitted can also be called a blank period.

[0118] In the CORESET mapping type 1 of TDM, each CORESET is configured before the corresponding SS block (at the beginning of the empty period immediately before the corresponding SS block).

[0119] For example, Fig.9A As shown, CORESET#0 is arranged at the leading symbol #0 of symbols #0 to #1 (null period) preceding the corresponding SS block #0. CORESET#1 is arranged at the leading symbol #6 of symbols #6 to #7 (null period) preceding the corresponding SS block #1.

[0120] The TDM CORESET mapping type 2 arranges each CORESET in sequence from the beginning of the time slot (the beginning of the first empty period).

[0121] For example, Fig. 9BAs shown, CORESET#0 is arranged in the leading symbol #0 of the slot, and CORESET#1 is arranged in the next symbol #1.

[0122] The TDM CORESET mapping type 3 arranges each CORESET in sequence starting from immediately after SS block #0 (the beginning of the second empty period).

[0123] For example, Fig. 9C As shown, CORESET#0 is configured in symbol #6 immediately following SS block #0, and CORESET#1 is configured in the next symbol #7.

[0124] For FDM and / or TDM, multiple CORESET mapping types may be specified by the specification. The UE may determine a CORESET mapping type indicated by a field of the CORESET structure table, or may determine a CORESET mapping type based on the indication information, the RMSI CORESET structure bit information, and the parameters of the RMSI CORESET structure table, and a specified formula.

[0125] The RMSI CORESET structure table includes information indicating the type of mapping of FDM and / or TDM, so that the RMSI CORESET can be set more flexibly even if the length of the RMSI CORESET structure bit information is limited.

[0126] Additionally, a type of mapping of FDM and / or TDM may also be specified by the specification.

[0127] (Wireless Communication System)

[0128] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present invention will be described. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above-mentioned embodiments of the present invention or a combination thereof.

[0129] Fig.10 The present invention is a diagram showing an example of a schematic structure of a wireless communication system according to an embodiment of the present invention. In the wireless communication system 1, carrier aggregation (CA) and / or dual connectivity (DC) that integrates a plurality of basic frequency blocks (component carriers) can be applied, wherein the basic frequency block is based on the system bandwidth (e.g., 20 MHz) of the LTE system as one unit.

[0130] In addition, the wireless communication system 1 may also be referred to as LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), NR (New Radio), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., and may also be referred to as a system that implements them.

[0131] The wireless communication system 1 includes a wireless base station 11 that forms a macro cell C1 with a wide coverage, and wireless base stations 12 (12a-12c) that are arranged in the macro cell C1 and form small cells C2 that are narrower than the macro cell C1. In addition, user terminals 20 are arranged in the macro cell C1 and each small cell C2. The arrangement and number of each cell and user terminal 20 are not limited to the method shown in the figure.

[0132] The user terminal 20 can connect to both the radio base station 11 and the radio base station 12. It is assumed that the user terminal 20 uses both the macro cell C1 and the small cell C2 by CA or DC. In addition, the user terminal 20 may also apply CA or DC using multiple cells (CCs) (e.g., 5 or less CCs, 6 or more CCs).

[0133] The user terminal 20 and the wireless base station 11 can communicate with each other using a carrier with a narrow bandwidth (also called an existing carrier, a legacy carrier, etc.) at a relatively low frequency band (for example, 2 GHz). On the other hand, the user terminal 20 and the wireless base station 12 can use a carrier with a wide bandwidth at a relatively high frequency band (for example, 3.5 GHz, 5 GHz, etc.), or can use the same carrier as that used between the user terminal 20 and the wireless base station 11. In addition, the structure of the frequency band used by each wireless base station is not limited to this.

[0134] The wireless base station 11 and the wireless base station 12 (or between two wireless base stations 12) can be set to a wired connection (for example, optical fiber, X2 interface, etc. compliant with CPRI (Common Public Radio Interface)) or a wireless connection.

[0135] The wireless base station 11 and each wireless base station 12 are respectively connected to the upper station device 30, and are connected to the core network 40 via the upper station device 30. In addition, the upper station device 30 includes, for example, an access gateway device, a radio network controller (RNC), a mobility management entity (MME), etc., but is not limited thereto. In addition, each wireless base station 12 can be connected to the upper station device 30 via the wireless base station 11.

[0136] In addition, the wireless base station 11 is a wireless base station with a relatively wide coverage range, and may also be referred to as a macro base station, a convergence node, an eNB (eNodeB), a transmission and reception point, etc. In addition, the wireless base station 12 is a wireless base station with a local coverage range, and may also be referred to as a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), a transmission and reception point, etc. Hereinafter, the wireless base stations 11 and 12 are collectively referred to as wireless base stations 10 without distinguishing between them.

[0137] Each user terminal 20 is a terminal supporting various communication methods such as LTE and LTE-A, and may include not only a mobile communication terminal (mobile station) but also a fixed communication terminal (fixed station).

[0138] In the wireless communication system 1 , as a radio access scheme, Orthogonal Frequency Division Multiple Access (OFDMA) is applied in downlink, and Single Carrier Frequency Division Multiple Access (SC-FDMA) and / or OFDMA is applied in uplink.

[0139] OFDMA is a multi-carrier transmission method that divides the frequency band into multiple narrow frequency bands (subcarriers) and maps data to each subcarrier for communication. SC-FDMA is a single-carrier transmission method that divides the system bandwidth into bands with one or continuous resource blocks for each terminal, and uses different bands by multiple terminals to reduce interference between terminals. In addition, the uplink and downlink wireless access methods are not limited to these combinations, and other wireless access methods can also be used.

[0140] In the wireless communication system 1, a downlink shared channel (PDSCH: Physical Downlink Shared Channel), a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel, etc., which are shared by each user terminal 20, are used as downlink channels. User data, high-layer control information, SIB (System Information Block), etc. are transmitted through PDSCH. In addition, MIB (Master Information Block) is transmitted through PBCH.

[0141] Downlink L1 / L2 control channels include PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel), etc. Downlink control information (DCI: Downlink Control Information) including scheduling information of PDSCH and / or PUSCH is transmitted through PDCCH.

[0142] In addition, scheduling information may also be notified through DCI. For example, DCI for scheduling DL data reception may also be called DL allocation, and DCI for scheduling UL data transmission may also be called UL grant.

[0143] The number of OFDM symbols used for PDCCH is transmitted via PCFICH. The delivery confirmation information (e.g., also called retransmission control information, HARQ-ACK, ACK / NACK, etc.) of HARQ (Hybrid Automatic Repeat reQuest) for PUSCH is transmitted via PHICH. EPDCCH is frequency-division multiplexed with PDSCH (downlink shared data channel) and is used to transmit DCI, etc., similar to PDCCH.

[0144] In the wireless communication system 1, as uplink channels, an uplink shared channel (physical uplink shared channel (PUSCH: Physical Uplink Shared Channel)), an uplink control channel (physical uplink control channel (PUCCH: Physical Uplink Control Channel)), a random access channel (physical random access channel (PRACH: Physical Random Access Channel)), etc., which are shared by each user terminal 20, are used. User data, high-layer control information, etc. are transmitted through the PUSCH. In addition, downlink wireless quality information (channel quality indicator (CQI: Channel Quality Indicator)), delivery confirmation information, scheduling request (SR: Scheduling Request), etc. are transmitted through the PUCCH. The random access preamble code used to establish a connection with a cell is transmitted through the PRACH.

[0145] In the wireless communication system 1, as downlink reference signals, a cell-specific reference signal (CRS: Cell-specific Reference Signal), a channel state information reference signal (CSI-RS: Channel State Information-Reference Signal), a demodulation reference signal (DMRS: DeModulation Reference Signal), a positioning reference signal (PRS: Positioning Reference Signal), etc. are transmitted. In addition, in the wireless communication system 1, as uplink reference signals, a measurement reference signal (sounding reference signal (SRS: Sounding Reference Signal)), a demodulation reference signal (DMRS), etc. are transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal (UE-specific Reference Signal)). In addition, the reference signal transmitted is not limited to this.

[0146] <Wireless Base Station>

[0147] Fig.11 1 is a diagram showing an example of the overall structure of a wireless base station according to an embodiment of the present invention. The wireless base station 10 includes: a plurality of transmitting and receiving antennas 101, an amplifier unit 102, a transmitting and receiving unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106. In addition, the structure may include more than one transmitting and receiving antenna 101, amplifier unit 102, and transmitting and receiving unit 103, respectively.

[0148] User data transmitted from the radio base station 10 to the user terminal 20 via the downlink is input from the upper station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106 .

[0149] In the baseband signal processing unit 104, for user data, transmission processing such as PDCP (Packet Data Convergence Protocol) layer processing, user data segmentation / combination, RLC (Radio Link Control) retransmission control and other RLC layer transmission processing, MAC (Medium Access Control) retransmission control (for example, HARQ transmission processing), scheduling, transmission format selection, channel coding, inverse fast Fourier transform (IFFT) processing, precoding processing and other transmission processing are performed, and then forwarded to the transmission and reception unit 103. In addition, for downlink control signals, transmission processing such as channel coding and inverse fast Fourier transform are also performed, and then forwarded to the transmission and reception unit 103.

[0150] The transmitting and receiving unit 103 converts the baseband signal outputted from the baseband signal processing unit 104 according to each antenna precoding into a radio frequency band and transmits it. The radio frequency signal subjected to frequency conversion in the transmitting and receiving unit 103 is amplified by the amplifier unit 102 and transmitted from the transmitting and receiving antenna 101. The transmitting and receiving unit 103 can be composed of a transmitter / receiver, a transmitting and receiving circuit, or a transmitting and receiving device explained based on the common knowledge in the technical field involved in the present invention. In addition, the transmitting and receiving unit 103 can be configured as an integrated transmitting and receiving unit, or can be configured by a transmitting unit and a receiving unit.

[0151] On the other hand, regarding the uplink signal, the radio frequency signal received by the transmitting / receiving antenna 101 is amplified by the amplifier unit 102. The transmitting / receiving unit 103 receives the uplink signal amplified by the amplifier unit 102. The transmitting / receiving unit 103 frequency-converts the received signal into a baseband signal and outputs it to the baseband signal processing unit 104.

[0152] In the baseband signal processing unit 104, the user data included in the input uplink signal is subjected to fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing, error correction decoding, MAC retransmission control reception processing, RLC layer and PDCP layer reception processing, and is forwarded to the upper station device 30 via the transmission path interface 106. The call processing unit 105 performs call processing (setting, release, etc.) of the communication channel, state management of the wireless base station 10, management of wireless resources, etc.

[0153] The transmission path interface 106 sends and receives signals via a predetermined interface with the upper station device 30. In addition, the transmission path interface 106 can send and receive (backhaul signaling) signals with other wireless base stations 10 via an inter-base station interface (e.g., an optical fiber or an X2 interface in accordance with CPRI (Common Public Radio Interface)).

[0154] In addition, the transmitting and receiving unit 103 may also transmit a synchronization signal block (eg, SS block, SS / PBCH block) including bit information (eg, RMSI CORESET structure bit information) related to the structure of a control resource set (eg, RMSI CORESET).

[0155] Fig.12 This is a diagram showing an example of a functional configuration of a wireless base station according to an embodiment of the present invention. In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is assumed that the wireless base station 10 also has other functional blocks required for wireless communication.

[0156] The baseband signal processing unit 104 includes at least a control unit (scheduler) 301, a transmission signal generating unit 302, a mapping unit 303, a reception signal processing unit 304, and a measuring unit 305. In addition, these configurations only need to be included in the wireless base station 10, and some or all of the configurations may not be included in the baseband signal processing unit 104.

[0157] The control unit (scheduler) 301 controls the entire wireless base station 10. The control unit 301 can be configured by a controller, a control circuit, or a control device described based on common knowledge in the technical field to which the present invention relates.

[0158] The control unit 301 controls, for example, signal generation by the transmission signal generating unit 302 and signal allocation by the mapping unit 303. The control unit 301 also controls signal reception processing by the reception signal processing unit 304 and signal measurement by the measuring unit 305.

[0159] The control unit 301 controls the scheduling (e.g., resource allocation) of system information, downlink data signals (e.g., signals sent in PDSCH), and downlink control signals (e.g., signals sent in PDCCH and / or EPDCCH. Delivery confirmation information, etc.). In addition, the control unit 301 controls the generation of downlink control signals, downlink data signals, etc. based on the result of determining whether retransmission control of uplink data signals is required, etc. In addition, the control unit 301 performs scheduling control of synchronization signals (e.g., PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal)), downlink reference signals (e.g., CRS, CSI-RS, DMRS), etc.

[0160] In addition, the control unit 301 controls the scheduling of uplink data signals (for example, signals sent in PUSCH), uplink control signals (for example, signals sent in PUCCH and / or PUSCH. Delivery confirmation information, etc.), random access preamble codes (for example, signals sent in PRACH), uplink reference signals, etc.

[0161] The transmission signal generating unit 302 generates a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) based on the instruction from the control unit 301, and outputs it to the mapping unit 303. The transmission signal generating unit 302 can be composed of a signal generator, a signal generating circuit, or a signal generating device explained based on the common knowledge in the technical field involved in the present invention.

[0162] The transmission signal generating unit 302 generates, for example, a DL allocation for notifying allocation information of downlink data and / or a UL grant for notifying allocation information of uplink data based on an instruction from the control unit 301. Both the DL allocation and the UL grant are DCI and follow the DCI format. In addition, the downlink data signal is coded and modulated according to a coding rate and a modulation method determined based on channel state information (CSI: Channel State Information) from each user terminal 20.

[0163] Based on the instruction from the control unit 301, the mapping unit 303 maps the downlink signal generated in the transmission signal generation unit 302 to a specified wireless resource and outputs it to the transmission and reception unit 103. The mapping unit 303 can be composed of a mapper, a mapping circuit or a mapping device described based on the common knowledge in the technical field involved in the present invention.

[0164] The received signal processing unit 304 performs reception processing (e.g., demapping, demodulation, decoding, etc.) on the received signal input from the transmitting and receiving unit 103. Here, the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20. The received signal processing unit 304 can be composed of a signal processor, a signal processing circuit, or a signal processing device described based on the common knowledge in the technical field involved in the present invention.

[0165] The reception signal processing unit 304 outputs the information decoded by the reception processing to the control unit 301. For example, when a PUCCH including HARQ-ACK is received, the HARQ-ACK is output to the control unit 301. In addition, the reception signal processing unit 304 outputs the reception signal and / or the signal after reception processing to the measurement unit 305.

[0166] The measurement unit 305 performs measurement on the received signal. The measurement unit 305 can be composed of a measurement device, a measurement circuit, or a measurement apparatus described based on the common knowledge in the technical field to which the present invention relates.

[0167] For example, the measuring unit 305 may perform RRM (Radio Resource Management) measurement, CSI (Channel State Information) measurement, etc. based on the received signal. The measuring unit 305 may also measure received power (e.g., RSRP (Reference Signal Received Power)), received quality (e.g., RSRQ (Reference Signal Received Quality)), SINR (Signal to Interference plus Noise Ratio)), signal strength (e.g., RSSI (Received Signal Strength Indicator)), propagation path information (e.g., CSI), etc. The measurement result may be output to the control unit 301.

[0168] <User Terminal>

[0169] Fig.13 1 is a diagram showing an example of the overall structure of a user terminal according to an embodiment of the present invention. The user terminal 20 includes a plurality of transmit / receive antennas 201, an amplifier unit 202, a transmit / receive unit 203, a baseband signal processing unit 204, and an application unit 205. In addition, the configuration may include at least one transmit / receive antenna 201, an amplifier unit 202, and a transmit / receive unit 203.

[0170] The radio frequency signal received by the transmitting and receiving antenna 201 is amplified in the amplifier unit 202. The transmitting and receiving unit 203 receives the downlink signal amplified in the amplifier unit 202. The transmitting and receiving unit 203 converts the received signal frequency into a baseband signal and outputs it to the baseband signal processing unit 204. The transmitting and receiving unit 203 can be composed of a transmitter / receiver, a transmitting and receiving circuit, or a transmitting and receiving device described based on the common understanding in the technical field involved in the present invention. In addition, the transmitting and receiving unit 203 can be composed of a transmitting and receiving unit as an integrated transmitting and receiving unit, or can be composed of a transmitting unit and a receiving unit.

[0171] The baseband signal processing unit 204 performs FFT processing, error correction decoding, reception processing of retransmission control, etc. on the input baseband signal. The downlink user data is forwarded to the application unit 205. The application unit 205 performs processing related to layers higher than the physical layer and the MAC layer, etc. In addition, broadcast information can also be forwarded to the application unit 205 in the downlink data.

[0172] On the other hand, uplink user data is input from the application unit 205 to the baseband signal processing unit 204. In the baseband signal processing unit 204, transmission processing of retransmission control (for example, transmission processing of HARQ), channel coding, precoding, discrete Fourier transform (DFT: Discrete Fourier Transform) processing, IFFT processing, etc. are performed and forwarded to the transmission and reception unit 203. The transmission and reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits it. The radio frequency signal subjected to frequency conversion in the transmission and reception unit 203 is amplified by the amplifier unit 202 and transmitted from the transmission and reception antenna 201.

[0173] In addition, the transmitting and receiving unit 203 may receive a synchronization signal block (eg, SS block, SS / PBCH block) including bit information (eg, RMSI CORESET structure bit information) related to the structure of a control resource set (eg, RMSI CORESET).

[0174] Fig.141 is a diagram showing an example of a functional configuration of a user terminal according to an embodiment of the present invention. In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and the user terminal 20 may also include other functional blocks required for wireless communication.

[0175] The baseband signal processing unit 204 included in the user terminal 20 includes at least a control unit 401, a transmission signal generating unit 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit 405. In addition, these structures may be included in the user terminal 20, and some or all of the structures may not be included in the baseband signal processing unit 204.

[0176] The control unit 401 controls the entire user terminal 20. The control unit 401 can be configured by a controller, a control circuit, or a control device that is commonly known in the technical field to which the present invention relates.

[0177] The control unit 401 controls, for example, signal generation by the transmission signal generating unit 402 and signal allocation by the mapping unit 403. The control unit 401 also controls signal reception processing by the reception signal processing unit 404 and signal measurement by the measuring unit 405.

[0178] The control unit 401 obtains the downlink control signal and the downlink data signal transmitted from the wireless base station 10 from the reception signal processing unit 404. The control unit 401 controls the generation of the uplink control signal and / or the uplink data signal based on the downlink control signal and / or the result of determining whether retransmission control of the downlink data signal is required.

[0179] Furthermore, when the control unit 401 obtains various information notified from the radio base station 10 from the reception signal processing unit 404 , the control unit 401 may update the parameters used for control based on the information.

[0180] The transmission signal generating unit 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) based on the instruction from the control unit 401, and outputs it to the mapping unit 403. The transmission signal generating unit 402 can be composed of a signal generator, a signal generating circuit, or a signal generating device explained based on the common knowledge in the technical field involved in the present invention.

[0181] The transmission signal generating unit 402 generates an uplink control signal related to the delivery confirmation information, channel state information (CSI), etc., based on, for example, an instruction from the control unit 401. In addition, the transmission signal generating unit 402 generates an uplink data signal based on an instruction from the control unit 401. For example, when the downlink control signal notified from the radio base station 10 includes a UL grant, the transmission signal generating unit 402 is instructed by the control unit 401 to generate an uplink data signal.

[0182] Based on the instruction from the control unit 401, the mapping unit 403 maps the uplink signal generated in the transmission signal generation unit 402 to the wireless resource and outputs it to the transmission and reception unit 203. The mapping unit 403 can be composed of a mapper, a mapping circuit or a mapping device explained based on the common knowledge in the technical field involved in the present invention.

[0183] The received signal processing unit 404 performs reception processing (e.g., demapping, demodulation, decoding, etc.) on the received signal input from the transmitting and receiving unit 203. Here, the received signal is, for example, a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) transmitted from the wireless base station 10. The received signal processing unit 404 can be composed of a signal processor, a signal processing circuit, or a signal processing device explained based on the common knowledge in the technical field involved in the present invention. In addition, the received signal processing unit 404 can constitute the receiving unit involved in the present invention.

[0184] The received signal processing unit 404 outputs the information decoded by the reception processing to the control unit 401. The received signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, etc. to the control unit 401. In addition, the received signal processing unit 404 outputs the received signal and / or the received processed signal to the measuring unit 405.

[0185] The measurement unit 405 performs measurement on the received signal. The measurement unit 405 can be composed of a measurement device, a measurement circuit, or a measurement apparatus described based on the common knowledge in the technical field to which the present invention relates.

[0186] For example, the measurement unit 405 may perform RRM measurement, CSI measurement, etc. based on the received signal. The measurement unit 405 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement result may be output to the control unit 401.

[0187] In addition, the control unit 401 can control the decision of the structure of the control resource set (e.g., RMSI CORESET) based on structure information (e.g., entry) within a structure information set (e.g., RMSI CORESET structure table) associated with bit information (e.g., RMSI CORESET structure bit information), wherein the structure information set is associated with indication information based on reception (e.g., reception of an SS block).

[0188] In addition, the indication information may also be one of a synchronization signal block and / or a control resource set, a frequency band, and a parameter set (eg, a subcarrier spacing).

[0189] In addition, the control unit 401 can also determine whether there is a synchronization signal block actually sent based on the structural information.

[0190] Furthermore, the structure information set may be one of a plurality of preset structure information sets, and may include a plurality of structure information sets associated with a plurality of values ​​of the bit information, respectively.

[0191] In addition, each of the multiple structure information sets may include at least one of the following: the relative position of the control resource set with respect to the synchronization signal block (e.g., time position and / or frequency position, CORESET mapping type), the mapping of the data demodulation reference signal for the control resource set (e.g., DMRS mapping type), the multiplexing method of the synchronization signal block and the control resource set, and a mode for specifying the relative position and a combination of at least one of the mapping and multiplexing methods (e.g., RMSICORESET structure bit information).

[0192] <Hardware Structure>

[0193] In addition, the block diagram used in the description of the above-mentioned embodiment represents the block of the functional unit. These functional blocks (structural units) are implemented by any combination of hardware and / or software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by using one device that is physically and / or logically combined, or two or more devices that are physically and / or logically separated can be directly and / or indirectly (for example, using wired and / or wireless) connected and implemented using these multiple devices.

[0194] For example, a wireless base station, a user terminal, etc. in one embodiment of the present invention may function as a computer that performs processing of the wireless communication method of the present invention. Fig.151 is a diagram showing an example of a hardware configuration of a wireless base station and a user terminal according to an embodiment of the present invention. The wireless base station 10 and the user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0195] In the following description, the word "device" can be replaced by circuit, equipment, unit, etc. The hardware configuration of the radio base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or may exclude some of the devices.

[0196] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be performed by one processor, or the processing may be performed by more than one processor simultaneously, sequentially, or using other methods. In addition, the processor 1001 may also be implemented by more than one chip.

[0197] Each function in the wireless base station 10 and the user terminal 20 is implemented, for example, as follows. By reading predetermined software (program) into hardware such as the processor 1001 and the memory 1002, the processor 1001 performs operations and controls communication via the communication device 1004, or controls reading and / or writing of data in the memory 1002 and the storage 1003.

[0198] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a computing device, registers, etc. For example, the baseband signal processing unit 104 (204), the call processing unit 105, etc., may also be implemented by the processor 1001.

[0199] In addition, the processor 1001 reads the program (program code), software module, data, etc. from the storage 1003 and / or the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that causes a computer to perform at least a part of the operations described in the above embodiments is used. For example, the control unit 401 of the user terminal 20 can be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and other functional blocks can also be implemented in the same way.

[0200] The memory 1002 is a computer-readable recording medium, and may be composed of at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically EPROM), a RAM (Random Access Memory), or other suitable storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store an executable program (program code), a software module, etc. for implementing the wireless communication method involved in one embodiment of the present invention.

[0201] The storage 1003 is a computer-readable recording medium, and may be composed of at least one of a flexible disk, a floopy (registered trademark) disk, an optical disk (e.g., a compact disk (CD-ROM (Compact Disc ROM)), a digital versatile disk, a Blu-ray (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0202] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via a wired and / or wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., for example, in order to realize frequency division duplex (FDD: Frequency Division Duplex) and / or time division duplex (TDD: Time Division Duplex). For example, the above-mentioned transmitting and receiving antenna 101 (201), amplifier unit 102 (202), transmitting and receiving unit 103 (203), and transmission path interface 106, etc., may also be realized by the communication device 1004.

[0203] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that performs output to the outside (e.g., a display, a speaker, an LED (Light Emitting Diode) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0204] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for information communication. The bus 1007 may be configured using a single bus or different buses for each device.

[0205] In addition, the wireless base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and may also use the hardware to implement a part or all of each functional block. For example, the processor 1001 may be implemented using at least one of these hardware.

[0206] (Variation Example)

[0207] In addition, the terms described in this specification and / or the terms required for understanding of this specification can be replaced with terms having the same or similar meanings. For example, a channel and / or a code element can also be a signal (signaling). In addition, a signal can also be a message. A reference signal can also be referred to as RS (Reference Signal), and depending on the applied standard, it can also be referred to as a pilot (Pilot), a pilot signal, etc. In addition, a component carrier (CC) can also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0208] In addition, a wireless frame may also be composed of one or more periods (frames) in the time domain. The one or more periods (frames) constituting a wireless frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may be a fixed duration (e.g., 1 ms) that is independent of a parameter set (Numerology).

[0209] Furthermore, a time slot may also be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing)) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access)) symbols, etc.) in the time domain. In addition, a time slot may be a time unit based on a parameter set (Numerology). In addition, a time slot may include multiple mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. In addition, a mini-slot may also be called a sub-slot.

[0210] Radio frames, subframes, time slots, mini-slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-slots, and symbols may also use other names corresponding to each other. For example, one subframe may also be called a transmission time interval (TTI), multiple consecutive subframes may also be called TTI, and one time slot or one mini-slot may also be called TTI. That is, a subframe and / or TTI may be a subframe (1ms) in an existing LTE, or a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. In addition, the unit representing TTI may also be called a time slot, a mini-slot, etc. instead of a subframe.

[0211] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, a wireless base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in units of TTI. In addition, the definition of TTI is not limited to this.

[0212] TTI may be a time unit for sending channel-coded data packets (transport blocks), code blocks and / or code words, and may also be a processing unit for scheduling, link adaptation, etc. In addition, when a TTI is given, the time domain (e.g., the number of symbols) to which a transport block, code block and / or code word is actually mapped may be shorter than the TTI.

[0213] In addition, when 1 time slot or 1 mini time slot is referred to as TTI, more than 1 TTI (i.e., more than 1 time slot or more than 1 mini time slot) can be the minimum time unit of scheduling. In addition, the number of time slots (number of mini time slots) constituting the minimum time unit of scheduling can be controlled.

[0214] A TTI with a duration of 1 ms may also be referred to as a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, or a long subframe, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-slot, or a sub-slot, etc.

[0215] In addition, long TTI (e.g., normal TTI, subframe, etc.) can also be replaced by a TTI with a duration exceeding 1 ms, and short TTI (e.g., shortened TTI, etc.) can also be replaced by a TTI with a TTI length shorter than that of long TTI and longer than 1 ms.

[0216] Resource block (RB) is a resource allocation unit in the time domain and frequency domain. In the frequency domain, it may also include one or more continuous subcarriers (subcarriers). In addition, RB may include one or more symbols in the time domain, and may also be the length of one time slot, one mini time slot, one subframe or one TTI. One TTI and one subframe may also be composed of one or more resource blocks, respectively. In addition, one or more RBs may also be referred to as physical resource blocks (PRB), subcarrier groups (SCG), resource element groups (REG), PRB pairs, RB pairs, etc.

[0217] In addition, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0218] In addition, the structures of the above-mentioned radio frames, subframes, time slots, mini-time slots, and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP: Cyclic Prefix) length can be variously changed.

[0219] In addition, the information, parameters, etc. described in this specification may be expressed using absolute values, relative values ​​relative to a specified value, or other corresponding information. For example, wireless resources may also be indicated by a specified index.

[0220] The names used for parameters and the like in this specification are not restrictive names at all. For example, various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.) and information elements can be identified by all appropriate names, and thus the various names assigned to these various channels and information elements are not restrictive names at all.

[0221] Information, signals, etc. described in this specification may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, code elements, and chips mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0222] In addition, information, signals, etc. can be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0223] The input and output information, signals, etc. may be stored in a specific area (e.g., a memory) or managed using a management table. The input and output information, signals, etc. may also be overwritten, updated, or added. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0224] The notification of information is not limited to the method / implementation method described in this specification, and other methods may also be used. For example, the notification of information may be implemented through physical layer signaling (e.g., downlink control information (DCI: Downlink Control Information), uplink control information (UCI: Uplink Control Information)), high-layer signaling (e.g., RRC (Radio Resource Control) signaling, broadcast information (Master Information Block (MIB: Master Information Block), System Information Block (SIB: System Information Block), etc.), MAC (Medium Access Control) signaling), other signals or a combination thereof.

[0225] In addition, physical layer signaling may also be referred to as L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as RRC message, for example, RRC connection setup (RRCConnectionSetup) message, RRC connection reconstruction (RRCConnectionReconfiguration) message, etc. In addition, MAC signaling may be notified using, for example, a MAC control element (MACCE (Control Element)).

[0226] Furthermore, notification of prescribed information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the prescribed information or by notifying other information).

[0227] The determination may be made by a value represented by 1 bit (0 or 1), by a true or false value (Boolean) represented by true (true) or false (false), or by comparison of numerical values ​​(for example, comparison with a specified value).

[0228] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be construed broadly to mean instructions, instruction sets, codes, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, execution threads, procedures, functions, etc.

[0229] In addition, software, instructions, information, etc. can be sent and received via transmission media. For example, when the software is sent from a website, server or other remote source using wired technology (coaxial cable, optical cable, twisted pair, digital subscriber line (DSL), etc.) and / or wireless technology (infrared, microwave, etc.), these wired technology and / or wireless technology are included in the definition of transmission media.

[0230] The terms "system" and "network" used in this specification may be used interchangeably.

[0231] In this specification, the terms "base station (BS)", "radio base station", "eNB", "gNB", "cell", "sector", "cell group", "carrier" and "component carrier" are used interchangeably. Base stations are also referred to as fixed stations, NodeB, eNodeB (eNB), access points, transmission points, reception points, femtocells, small cells, etc.

[0232] A base station can accommodate one or more (for example, three) cells (also called sectors). When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (remote radio head (RRH))). Terms such as "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or a base station subsystem that provides communication services within the coverage area.

[0233] In this specification, the terms "mobile station (MS)", "user terminal (user terminal)", "user equipment (UE)" and "terminal" are used interchangeably. Base stations are also referred to as fixed stations (fixed station), NodeB, eNodeB (eNB), access points (access points), transmission points, reception points, femto cells, small cells, etc.

[0234] A mobile station is also sometimes referred to by those skilled in the art as a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handheld device, a user agent, a mobile client, a client or some other appropriate terminology.

[0235] In addition, the wireless base station in this specification may also be replaced by a user terminal. For example, the various methods / implementations of the present invention may also be applied to a structure in which the communication between a wireless base station and a user terminal is replaced by communication between multiple user terminals (device-to-device (D2D: Device-to-Device)). In this case, the user terminal 20 may be configured to have the functions of the above-mentioned wireless base station 10. In addition, the words "uplink" and "downlink" may also be replaced by "side". For example, the uplink channel may also be replaced by a side channel.

[0236] Likewise, the user terminal in this specification may be replaced by a wireless base station. In this case, the wireless base station 10 may be configured to have the functions of the user terminal 20 described above.

[0237] In this specification, operations performed by a base station may also be performed by its upper node depending on the situation. In a network including one or more network nodes having a base station, various operations performed for communication with a terminal may obviously be performed by a base station, one or more network nodes other than the base station (for example, consider MME (Mobility Management Entity), S-GW (Serving-Gateway), etc., but not limited to this), or a combination thereof.

[0238] Each method / implementation method described in this specification may be used alone, in combination, or switched during execution. In addition, the processing procedures, timings, flow charts, etc. of each method / implementation method described in this specification may be swapped in order as long as they are not contradictory. For example, with respect to the method described in this specification, the elements of various steps are presented in the order of examples, and are not limited to the specific order presented.

[0239] The various modes and implementation modes described in this specification can be applied to LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access), FX (Future generation radio access), GSM (registered trademark) (Global System for Mobile communications), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and systems utilizing other appropriate wireless communication methods and / or next-generation systems expanded based on them.

[0240] The phrase “based on” used in this specification does not mean “based only on” unless otherwise explicitly described. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0241] Any reference to an element using the terms "first", "second", etc. used in this specification is not intended to be a comprehensive limitation on the number or order of these elements. These terms may be used in this specification as a convenient method of distinguishing between two or more elements. Therefore, a reference to a first and a second element does not mean that only two elements may be used or that the first element must be located before the second element in some form.

[0242] The term "determining" used in this specification sometimes includes a variety of operations. For example, "determining" can regard calculating, computing, processing, deriving, investigating, looking up (for example, searching in a table, database or other data structure), ascertaining, etc. as performing "determining". In addition, "determining" can regard receiving (for example, receiving information), transmitting (for example, sending information), input, output, accessing (for example, accessing data in a memory), etc. as performing "determining". In addition, "determining" can regard resolving, selecting, choosing, establishing, comparing, etc. as performing "determining". That is, "determining" can regard certain operations as performing "determining".

[0243] The terms "connected", "coupled", etc., or all their variations, used in this specification mean all direct or indirect connections or combinations between two or more elements, and can include the situation where there are one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The combination or connection between elements can be physical, logical, or a combination thereof. For example, "connection" can also be replaced by "access".

[0244] In this specification, when two elements are connected, it can be considered that they are "connected" or "combined" to each other using one or more wires, cables, and / or printed electrical connections, and as some non-limiting and non-exhaustive examples, they are "connected" or "combined" to each other using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, and / or light (both visible and invisible light) region.

[0245] In the present specification, the term "A is different from B" may also mean "A and B are different from each other." The terms "separate" and "combined" may also be interpreted in the same manner.

[0246] When the terms "including", "comprising" and their variations are used in the present specification or claims, these terms are intended to be inclusive, similar to the term "having". Furthermore, the term "or" used in the present specification or claims does not mean a logical exclusive OR.

[0247] The present invention has been described in detail above, but it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as a modification and variation without departing from the purpose and scope of the present invention determined by the description of the claims. Therefore, the description of this specification is for the purpose of exemplary description and does not bring any restrictive meaning to the present invention.

Claims

1. A terminal having: A receiving unit, receiving an SS / PBCH block, wherein the SS / PBCH block includes a synchronization signal, namely, an SS, and a physical broadcast channel, namely, a PBCH; as well as The control unit determines a structure information of a control resource set of a downlink control channel including scheduling system information, The PBCH contains bit information, Each of the plurality of structure information sets includes a plurality of structure information. Each of the plurality of structure information includes a plurality of parameters related to the control resource set, The multiple parameters include: a multiplexing mode of the SS / PBCH block and the control resource set; a bandwidth of the control resource set; a time length of the control resource set; and a frequency offset of the control resource set relative to the SS / PBCH block. The control unit determines a structure information set from a plurality of structure information sets based on a frequency band of the SS / PBCH block and a first subcarrier spacing of the SS / PBCH, The control unit determines the one piece of structure information corresponding to the bit information from the one set of structure information.

2. The terminal according to claim 1, wherein: The control unit determines, based on the determined configuration information, that a specific SS / PBCH block is not actually transmitted.

3. A wireless communication method of a terminal, comprising: receiving a SS / PBCH block, wherein the SS / PBCH block includes a synchronization signal (SS) and a physical broadcast channel (PBCH); and The step of determining a structure information of a control resource set of a downlink control channel including scheduling system information, The PBCH contains bit information, Each of the plurality of structure information sets includes a plurality of structure information. Each of the plurality of structure information includes a plurality of parameters related to the control resource set, The multiple parameters include: The multiplexing mode of the SS / PBCH block and the control resource set; the bandwidth of the control resource set; The time length of the control resource set; and a frequency offset of the control resource set relative to the SS / PBCH block, The terminal determines a structure information set from a plurality of structure information sets based on a frequency band of the SS / PBCH block and a first subcarrier spacing of the SS / PBCH, The terminal determines the one piece of structure information corresponding to the bit information from the one set of structure information.

4. A system having a terminal and a base station, The terminal comprises: A receiving unit, receiving an SS / PBCH block, wherein the SS / PBCH block includes a synchronization signal, namely, an SS, and a physical broadcast channel, namely, a PBCH; as well as The control unit determines a structure information of a control resource set of a downlink control channel including scheduling system information, The PBCH contains bit information, Each of the plurality of structure information sets includes a plurality of structure information. Each of the plurality of structure information includes a plurality of parameters related to the control resource set, The multiple parameters include: a multiplexing mode of the SS / PBCH block and the control resource set; a bandwidth of the control resource set; a time length of the control resource set; and a frequency offset of the control resource set relative to the SS / PBCH block. The control unit determines a structure information set from a plurality of structure information sets based on a frequency band of the SS / PBCH block and a first subcarrier spacing of the SS / PBCH, The control unit determines the one structure information corresponding to the bit information from the one structure information set, The base station sends the SS / PBCH block.

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