Radio Communication Terminal and Method

Abstract

To properly conduct communication in a radio communication system that supports numerology different from the existing LTE system, a receiving section is provided that receives a set of broadcast channels for each predetermined frequency band, and a control section that controls the reception of the broadcast channel in each frequency band. In broadcast channels that correspond respectively to different frequency bands, at least one of a certain size, a number of features, and notification content are defined independently.

Description

1 / 54 Radio Communication Terminal and Method Technical field

[001] The present invention relates to a user terminal and radio communication method in the next generation mobile communication system. Fundamentals of the technique

[002] In UMTS (Universal Mobile Telecommunications System) networks, for the purposes of higher data rates, low latency and the like, Long Term Evolution (LTE) was specified (Non-Patentable Document 1). In addition, for the purposes of wider bandwidths and higher speeds than LTE (also referred to as LTE Rel.8 or 9), LTE-A (LTE-Advanced, also referred to as LTE Rel.10, 11, 12 or 13) was specified, and successor systems (e.g., also referred to as FRA (Future Radio Access), 5G (5th Generation Mobile Communication System), NR (New Radio), NX (New Radio Access), FX (Future Generation Radio Access), LTE Rel.14 or 15 onwards) to LTE were studied.

[003] In LTE Rel.10 / 11, in order to widen the band, Carrier Aggregation (CA) is introduced to aggregate a plurality of component carriers (CC: Component Carrier). Each CC is configured with an LTE Rel.8 system band as a unit. In addition, in CA, a plurality of CCs from the same radio base station (eNB: eNode) is configured on a user terminal (UE: User Equipment).

[004] On the other hand, in LTE Rel.12, dual connectivity (DC) is introduced, where a plurality of cell groups (CG: Cell Group) from different base radio stations is defined in the UE. Each cell group is composed of at least one single cell (CC). In DC, since a plurality of CCs from different base radio stations is aggregated, DC is also called base interstation CA (Inter-eNB CA) and similar. Petition 870190096614, dated 09 / 26 / 2019, page 10 / 66 2 / 54

[005] In addition, in the existing LTE system (e.g., LTE Rel.8-13), synchronization signals (PSS, SSS) for a user terminal to use in initial access operation, broadcast channel (PBCH) and the like are assigned to previously defined regions in a fixed manner. A user terminal detects the synchronization signal by cell search, thus acquiring synchronization with the network and is able to identify the cell (e.g., cell ID) for the user terminal to connect to. Furthermore, upon receiving the broadcast channel (PBCH, SIB) after cell search, the terminal is able to acquire system information. Prior Art Document Non-Patentable Document

[006] [Non-patentable document 1] 3GPP TS 36.300 Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); General description; Stage 2 Summary of the Invention Technical problem

[007] In future radiocommunication systems (e.g., 5G, NR), it is expected that various radiocommunication services will be upgraded to meet their respective different requirements (e.g., ultra-high speed, high capacity, ultra-low delay, and the like). For example, in 5G / NR, it is being studied to offer radiocommunication services called eMBB (Enhanced Mobile Broadband), IoT (Internet of Things), mMTC (Massive Machine-Type Communication), M2M (Machine-to-Machine), URLLC (Ultra-Reliable Low Latency Communications), and the like.

[008] Furthermore, in 5G / NR, it is necessary to support the use of numerology and flexible frequencies and update dynamic frame configurations. For example, numerology refers to communication parameters (e.g., subcarrier spacing, bandwidth, and the like) applied to Petition 870190096614, dated 09 / 26 / 2019, page 11 / 66 3 / 54 transmission / reception of some signal.

[009] However, in the case of supporting different numerology (subcarrier spacing, bandwidth and the like) from the existing LTE system, it has not been determined how to control transmission / reception in communication. For example, in 5G / NR, the offering of services using 100 GHz, which is an extremely high carrier frequency, is studied, and it is also assumed that a plurality of numerology is supported corresponding to each radiocommunication service.

[0010] In this case, when control schemes (e.g., signal design and the like) of the existing LTE system are used without any modification, there is a risk that transmission / reception of a signal (e.g., transmission / reception of system information and the like) will not be performed correctly and that the requirements will not be met in each radiocommunication service.

[0011] The present invention was made in view of such respect, and it is an object of the invention to provide a user and radio communication terminal capable of adequately performing communication in a radio communication system to support numerology different from the existing LTE system. Solution to the problem

[0012] A user terminal according to one aspect of the present invention is characterized by having a receiving section that receives a set of broadcast channels for each predetermined frequency band and a control section that controls the reception of the broadcast channel in each frequency band, wherein in the broadcast channels that correspond respectively to different frequency bands, at least one of a size, a quantity of features and notification content is defined independently. Petition 870190096614, dated 09 / 26 / 2019, page 12 / 66 4 / 54 Advantageous Effect of the Invention

[0013] According to the present invention, it is possible to achieve proper communication in a radio communication system to support numerology different from the existing LTE system. Brief description of the drawings

[0014]

[0015] Figure 1 is a conceptual explanatory diagram of SS blocks; Figures 2A and 2B are diagrams showing an example of a PSS / SSS / PBCH arrangement for each frequency band; Figures 3A and 3B are diagrams to explain the number of bits used in SFN notification; Figures 4A and 4B are diagrams showing an example of SS blocks within a set of SS bursts; Figure 5 is a diagram showing an example of NR-PBCH projects corresponding to a plurality of band groups; Figure 6 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment of the present invention; Figure 7 is a diagram showing an example of a complete configuration of a radio base station according to an embodiment of the invention; Figure 8 is a diagram showing an example of a radio base station function configuration according to an embodiment of the invention; Figure 9 is a diagram showing an example of a complete configuration of a user terminal according to an embodiment of the invention; Figure 10 is a diagram showing an example of a user terminal function configuration according to an embodiment of the invention; and Petition 870190096614, dated 09 / 26 / 2019, page 13 / 66 5 / 54 Figure 11 is a diagram showing an example of the hardware configurations of the radio base station and the user terminal according to one embodiment of the invention. Description of the Modalities

[0016] In the initial access processing in the existing LTE system, a user terminal detects a synchronization signal and is therefore able to detect at least the frequency-time synchronization and the cell identifier (cell ID). Furthermore, after acquiring network synchronization and obtaining the cell ID, the user terminal receives a broadcast channel (e.g., PBCH) including system information. Subsequent to the detection of the synchronization signal and demodulation of the broadcast channel, for example, the user terminal receives SIB (System Information Block), transmits PRACH (Physical Random Access Channel), and similar information.

[0017] Thus, in the existing LTE system, the user terminal receives the system information (broadcast information) required for downlink communication using MIB (Master Information Block) and similar transmitted on the broadcast channel (PBCH). The broadcast channel (LTE-PBCH) of the existing LTE system is transmitted in subframe #0 in each radio frame with a periodicity of 10 ms in the 1.4 MHz center band (6RB center).

[0018] In the PBCH (MIB), the information (downlink bandwidth, downlink control channel configuration, system frame number (SFN), etc.) necessary to receive downlink data with predetermined bits is defined. The user terminal controls the reception of SIB (System Information Block) transmitted on an LTE-PBCH-based downlink shared data channel (PDSCH). Upon receiving the SIB, the user terminal is able to obtain the minimum system information necessary for communication. Therefore, the SIB is also called Petition 870190096614, dated 09 / 26 / 2019, page 14 / 66 6 / 54 of minimum system information remaining.

[0019] In addition, a broadcast channel assignment position (LTEPBCH) in the existing LTE system is fixed in time resources and frequency resources. Thus, once the LTE-PBCH is transmitted from the radio base station in fixed resources, without transmitting a particular notification to the user terminal, the terminal is able to receive it.

[0020] Also in future radiocommunication systems, in order to communicate using a newly introduced carrier (also called the NR (cell) carrier), the user terminal needs to receive system information (MIB and / or SIB) during initial access processing and similar procedures. Furthermore, as a method of transmitting / receiving the SIB (minimum remaining system information), the following Options 1 to 3 are studied.

[0021] <Opção 1> Option 1 is a method of transmitting the SIB in the PDSCH as in the existing LTE system. Specifically, after receiving synchronization and broadcast channel signals, a user terminal receives a PDSCH (SIB) scaled in a downlink control channel (common search space) (Option 1-1). Subsequently, based on the received system information and similar data, the user terminal controls a random access procedure.

[0022] Alternatively, instead of scheduling the PDSCH (SIB) on the downlink control channel (common search space), the user terminal can assign resources from a PDSCH to transmit the SIB on the PBCH (Option 1-2).

[0023] <Opção 2> Option 2 is a method of transmitting the SIB on a newly defined PBCH. Specifically, after receiving synchronization and broadcast channel signals, a user terminal receives the SIB on the newly defined broadcast channel. Petition 870190096614, dated 09 / 26 / 2019, page 15 / 66 7 / 54 defined (second broadcast channel). Subsequently, based on the received system information and similar data, the user terminal controls a random access procedure.

[0024] <Opção 3> Option 3 is a method for setting the initial UL transmission in the PBCH and transmitting a PDSCH (SIB) in response to the UL transmission.

[0025] Thus, in 5G / NR, several methods are studied, such as the method of transmitting / receiving system information (e.g., SIB). From the point of view of compatibility with the existing LTE system, the application of Option 1-1 is considered. Furthermore, this modality is applicable to any of the Options.

[0026] <Bloco de SS> Furthermore, in 5G / NR, a signal group including at least the synchronization (PSS / SSS) and broadcast channel (PBCH) signals is defined as an SS block and is studied for communication using the SS block. For example, when operating a multibeam and similar systems, it is expected to periodically transmit the entire set of SS bursts comprised by a plurality of SS blocks repeatedly.

[0027] The SS (synchronization signal) block will be described with reference to Figure 1. Figure 1 is a conceptual explanatory diagram of the SS block. The SS Block refers to features (or set of features) including at least PSS (NR-PSS), SSS (NR-SSS) and PBCH (NR-PBCH).

[0028] For example, the UE can assume that the PSS, SSS, and PBCH received in SS blocks corresponding to the same SS block index are transmitted in the same beam. Furthermore, in the following description, the PSS, SSS, and PBCH can be read respectively as PSS (NR-PSS) for NR, SSS (NR-SSS) for NR, and PBCH (NR-PBCH) for NR. Petition 870190096614, dated 09 / 26 / 2019, p. 16 / 66 8 / 54

[0029] A group of a single SS block or a plurality of SS blocks can be called an SS burst. Figure 1 shows an example of SS burst length = L. In this example, the SS burst consists of SS blocks that are contiguous at different times (SS block indices #0 to #L1), but is not limited to them. For example, the SS burst may consist of SS blocks with contiguous frequency and / or time features, or it may consist of SS blocks with distiguous frequency and / or time features.

[0030] The SS burst is preferably transmitted at each predetermined periodicity (may be called SS burst periodicity). Furthermore, a single or plurality of SS bursts may be called an SS burst set (SS burst series). For example, a radio base station and / or UE may transmit PSS / SSS / PBCH by beam sweep, using one or more SS bursts included in a single SS burst set. Furthermore, the UE may assume that the SS burst set is transmitted periodically (with the periodicity of the SS burst set).

[0031] PSS and SSS or PSS (SSS) and PBCH can be subjected to Time Division Multiplexing (TDM), or they can be subjected to Frequency Division Multiplexing (FDM).

[0032] Candidate SS block positions can be defined for each frequency band in the specifications to make a configuration to allow a user terminal to identify the SS block index from a signal within the SS block. For example, the base station can include the SS block index in NR-PBCH to transmit to a user terminal. By this means, the UE is able to obtain the SS block index of the received PBCH.

[0033] In addition, by defining the candidate positions in advance for Petition 870190096614, dated 09 / 26 / 2019, page 17 / 66 9 / 54 SS block, when the user terminal is able to reach the SS block index, the terminal is able to determine a symbol index and / or slot index. Furthermore, by pre-defining the candidate SS block positions, it is possible to suppress the number of bits required for SS block index notification. Additionally, it is possible to transmit PSS / SSS / PBCH corresponding to the same SS block index using the same beam.

[0034] Furthermore, in future radiocommunication systems (5G / NR), the case is also considered where a plurality of numerology is defined. In such a case, between different numerologies, the content of the system information (e.g., number of frames and / or system subframe index, etc.) is considered to differ. However, any configuration (whose information is included and similar) of the broadcast channel (NR-PBCH) transmitted in 5G / NR has not been determined. Furthermore, it has not been determined how a user terminal acquires the system information (e.g., SIB) to access the NR cell after NR-PBCH detection.

[0035] For example, in the case of using Option 1-1 mentioned above, a user terminal that detects the synchronization signal (NR-PSS / NR-SSS) and the broadcast channel (NR-PBCH) needs to access resources (search space) of a downlink control channel to scale the system information (minimum SI). In this case, it is considered to include information about a defined region for the downlink control channel in NR-PBCH. Furthermore, for a user terminal to access an SS block index, it is also considered to include information about the SS block index in NR-PBCH.

[0036] However, if NR-PBCH is designed to support a plurality of communication systems, there is a risk that the size (e.g., the payload size) of NR-PBCH will be extremely large. Petition 870190096614, dated 09 / 26 / 2019, page 18 / 66 10 / 54 For example, in multibeam operation (e.g., high-frequency band) using many beams, the number of bits increases to notify the SS block index. Furthermore, in a broadband carrier, once a set of control resources that is a candidate for assignment to downlink control information is largely formed, the number of bits increases to notify the set of control resources.

[0037] Therefore, the inventors of the present invention noted the need to respect the fact that at least one of the minimum carrier bandwidth, maximum carrier bandwidth, and maximum number of beams must be defined differently for each applied frequency band (e.g., predetermined band) in the case of establishing a plurality of the numerology. Thus, the inventors of the invention conceived the definition of an NR-PBCH configuration (or NR-PBCH design, NR-PBCH parameter) independently (or differently) for each predetermined frequency band.

[0038] In one aspect of the present invention, in defined broadcast channels corresponding respectively to different frequency bands, at least one of a size (payload size), amount of resources and notification content is defined independently. The resource value corresponds to the resources to which NR-PBCH is allocated and is capable of being defined by the number of symbols and / or bandwidth.

[0039] In addition, using NR-PBCH, at least one of the following pieces of information (1) to (6) is transmitted to a user terminal. In addition, the number of bits of each piece of information can be defined to vary for each frequency band. Furthermore, it is possible to include part or all of each piece of information in NR-PBCH to notify a user terminal. Petition 870190096614, dated 09 / 26 / 2019, page 19 / 66 11 / 54 (1) Information regarding a system frame number (SFN and / or H-SFN) (2) Information regarding an SS block index (3) Information regarding a set of control features (at least frequency feature position information) (4) Information regarding subcarrier spacing (5) Information regarding cyclic prefix (CP) overloads (6) Information regarding the number of antenna ports

[0040] One embodiment according to the present invention will be described below in detail with reference to the drawings. A radiocommunication method according to each embodiment can be applied alone, or it can be applied in combination.

[0041] (Aspect 1) Aspect 1 describes the case of defining different NR-PBCH design parameters for each frequency band. For example, at least one of the payload size, resource quantity (number of symbols and / or bandwidth), and notification contents is defined independently (differently) for each frequency band.

[0042] In a high-frequency band (e.g., 3.5 GHz or 6 GHz or more), the available bandwidth is wide, although many beams are needed for multibeam operation and similar applications. Therefore, the information included in NR-PBCH increases relatively. Therefore, in NR-PBCH (e.g., NR-PBCH transmitted in the high-frequency band) that corresponds to the high-frequency band, the payload size and / or the amount of resources can be configured to be large.

[0043] In a low frequency band (for example, less than 3.5 GHz), there is the case where the available bandwidths are limited. In such Petition 870190096614, dated 09 / 26 / 2019, p. 20 / 66 In the case of NR-PBCH (e.g., NR-PBCH transmitted in the low-frequency band), which corresponds to the low-frequency band, the amount of resources may be limited. Furthermore, in the low-frequency band, since there are few cases where a high number of beams are used, the payload size of NR-PBCH can be set to be small accordingly.

[0044] Figure 2A shows an example of a PSS / SSS / PBCH arrangement method in a frequency band A (e.g., low frequency band). Here, the case is shown where PSS, SSS, and PBCH are arranged with the same bandwidth. Figure 2B shows an example of a PSS / SSS / PBCH arrangement method in a frequency band B (e.g., high frequency band).

[0045] It is assumed that frequency band B is positioned in a higher frequency region than frequency band A. In frequency band B, when compared to frequency band A, the case is shown where the subcarrier spacings (SCS) for the PSS and SSS are set wide to linearly scale the bandwidth. For the PBCH corresponding to frequency band B, the case is shown where the subcarrier spacing is set to be wider than the PSS / SSS, and the feature value is extended with the increased number of RBs. By this means, it is also possible to increase the payload size of the PBCH.

[0046] Thus, in the case where the frequency bands are different, given that the required conditions are also different, by independently defining the respective NR-PBCH design parameter, it is possible to achieve communication properly, using the appropriate PBCH for each frequency band.

[0047] (Aspect 2) Petition 870190096614, dated 09 / 26 / 2019, p. 21 / 66 13 / 54 Aspect 2 describes the case of including at least some of the system frame number (SFN and / or H-SFN (HyperSFN)) information in the NR-PBCH. Furthermore, for NR-PBCHs that correspond to different frequencies, the number of bits used in reporting the system frame number information can be defined independently, respectively.

[0048] In the case of including information regarding the number of system frames (hereinafter described as SFN) in NR-PBCH transmitted respectively in each frequency band to be transmitted, a configuration can be made where the SFN value is repeated 2n times. By this means, by redefining the scrambling applied to the NR-PBCH transmission data at the beginning of the repetition, it is possible to implicitly express (notify) a part of the SFN information.

[0049] In the case of performing communication using the SS block (see Figure 1), the periodicity of the SS burst set can be defined independently for each frequency band. For example, in frequency band A (e.g., low frequency band), the periodicity of the SS burst set is set at 10 ms (4 repetitions) (see Figure 3A). On the other hand, in frequency band B (e.g., high frequency band), the periodicity of the SS burst set is set at 80 ms (2 repetitions) (see Figure 3B). Obviously, the periodicity of the SS burst set and the number of repetitions are not limited to these. Furthermore, Figure 3A shows the case of 1-beam transmission performance (one SS block) and Figure 3B shows the case of 16-beam transmission performance (16 SS blocks).

[0050] In Figure 3A, once a user terminal reaches a periodicity of 10 ms, the timing at which the repetition changes and so on. Petition 870190096614, dated 09 / 26 / 2019, p. 22 / 66 14 / 54 capable of determining the detected SFN, instead of 10 bits, the SFN can be notified using 8 bits (2 bits are determined implicitly). In this case, it is possible to define the SFN included in NR-PBCHs (for example, from #0 to #3) repeated 4 times, using 8-bit information that is the same number. In other words, in NR-PBCH (transmitted in frequency band A) that corresponds to frequency band A, it is possible to define the number of bits used in the SFN notification as “8”.

[0051] In Figure 3B, since a user terminal achieves a periodicity of 8 ms and the timing at which the repetition changes and is thus able to determine the detected SFN, instead of 10 bits, the SFN can be notified using 6 bits (4 bits are implicitly determined). In this case, it is possible to define the SFN included in NR-PBCHs (for example, an interval from #0 to #11) repeated 2 times, using 6 bits of information that are the same number. In other words, in NR-PBCH (transmitted in frequency band B) that corresponds to frequency band B, it is possible to define the number of bits used in the SFN notification as 6”.

[0052] Thus, it is possible to independently define the bit information for SFN notification included in NR-PBCH for each frequency band. By this means, by taking into account the bit information required for SFN notification for each frequency band, it is possible to suppress the increase in NR-PBCH overhead, and to carry out communication appropriately, using the appropriate PBCH for each frequency band.

[0053] (Aspect 3) Aspect 3 describes the case of including at least part of the information about the SS block index in NR-PBCH. Furthermore, for NR-PBCHs that correspond to different frequencies, the number of bits used in reporting information about the SS block index may be... Petition 870190096614, dated 09 / 26 / 2019, page 23 / 66 15 / 54 defined independently, respectively.

[0054] In the case of beam-based communication (BF), the number of beams applied varies according to the frequency band. For example, the number of beams is assumed to be high in a high-frequency band for communication, compared to a low-frequency band. In the case of SS-block communication (see Figure 1), the number of SS-block indices also varies according to the number of bits applied. In other words, if the base radio station includes information about the SS-block index in NR-PBCH to notify the user terminal, the number of SS-block indices to notify changes for each frequency band.

[0055] Therefore, it is preferable to control communication by defining the number of SS blocks (SS block indices) within the SS burst set independently (or to be a different value) for each frequency band. Furthermore, in this case, the number of bits required to represent the SS block index also varies for each frequency band. Consequently, the number of bits of the SS block index included in NR-PBCH is controlled respectively for each frequency band.

[0056] Figure 4A shows the case where the maximum number of SS blocks within the SS burst set is “4” in frequency band A (e.g., low frequency band). In this case, in NR-PBCH corresponding to frequency band A, it is possible to set the number of bits used in the SS block index notification to “2”.

[0057] Figure 4B shows the case where the maximum number of SS blocks within the SS burst set is “64” in frequency band B (e.g., low frequency band). In this case, in NR-PBCH which corresponds Petition 870190096614, dated 09 / 26 / 2019, p. 24 / 66 In frequency band B (16 / 54), it is possible to set the number of bits used in the SS block index notification to 6.

[0058] Alternatively, in the case where the maximum number of SS blocks within the SS burst set is 256 in a C frequency band, in NR-PBCH which corresponds to the C frequency band, it is possible to set the number of bits used in the SS block index notification to 8.

[0059] Thus, it is possible to define the bit information for notification of the SS block index included in NR-PBCH independently, corresponding to the number of SS blocks within the SS burst set that is defined for each frequency band. By this means, it is possible to suppress the increase in NR-PBCH overhead, and properly perform communication using the appropriate PBCH for each frequency band.

[0060] (Aspect 4) Aspect 4 describes the case of including at least some of the information regarding a set of control features in NR-PBCHs. Furthermore, for NR-PBCHs that correspond to different frequencies, the number of bits used in reporting information about the set of control features can be defined independently, respectively.

[0061] In future radiocommunication systems, instead of always allocating downlink control information to some UE for the entire system band to transmit, it is considered that a predetermined frequency region is defined to control the transmission of downlink control information. The predetermined frequency region defined in the UE is also called the control resource set (CORSET), control resource set, control sub-band, search space set, search space resource set, control region, control sub-band, NR-PDCCH region, or similar. Petition 870190096614, dated 09 / 26 / 2019, page 25 / 66 17 / 54

[0062] The control resource set consists of a predetermined resource unit and can be configured at a system bandwidth (carrier bandwidth) or less. For example, the control resource set can consist of a single or a plurality of RBs (PRB and / or VRB) in the frequency domain. Here, RB means a frequency resource block unit consisting of 12 subcarriers. The UE monitors downlink control information within a range of the control resource set and is able to control reception. By this means, in processing the reception of downlink control information, the UE does not need to always monitor the entire system bandwidth and is able to reduce power consumption.

[0063] In the case of defining the control resource set, information regarding the control resource set, bandwidth information and / or frequency position information of the control resource set can be included. Frequency position information can be an offset of the SS block frequency position.

[0064] The time region information of the control feature set can be defined in specifications for each frequency band, or a portion of the information can be reported using NR-PBCH bits. For example, it is possible to report only a portion of the candidate time positions of the control feature set defined in the specifications.

[0065] It is assumed that the set of control resources is changed and defined corresponding to an applicable frequency band (maximum carrier bandwidth). In the case of defining a different maximum carrier bandwidth for each frequency band, the frequency positions Petition 870190096614, dated 09 / 26 / 2019, p. 26 / 66 18 / 54 candidates for allocating the control resource set are more numerous because the carrier is a wider band and therefore the number of bits needed to notify the frequency position can be increased. Therefore, the number of bits of the control resource set included in NR-PBCH is essentially controlled, respectively, for each frequency band.

[0066] For example, it is assumed that frequency band A (e.g., low frequency band) includes the maximum bandwidth set at 100 MHz and the SS bandwidth at 10 MHz, and that frequency band B (e.g., high frequency band) includes the maximum carrier bandwidth set at 1 GHz and the SS bandwidth set at 40 MHz. Furthermore, the SS bandwidth corresponds to a bandwidth to which the SS block is allocated.

[0067] In this case, in frequency band A, since the control resource is considered to be narrower than in frequency band B, it is possible to decrease the number of bits to report bandwidth information from the control resource set. Additionally, it is also possible to decrease the number of bits to report frequency offset information from the control resource set. On the other hand, in frequency band B, since the control resource is considered to be wider than in frequency band A, it is possible to increase the number of bits to report bandwidth information from the control resource set. Additionally, it is also possible to increase the number of bits to report frequency offset information from the control resource set.

[0068] Thus, corresponding to the set of control resources (or, maximum carrier bandwidth) defined for each frequency band, Petition 870190096614, dated 09 / 26 / 2019, page 27 / 66 19 / 54 allows for the independent definition of bit information for notification of the control resource set included in NR-PBCH. This allows for the suppression of increased NR-PBCH overhead and ensures proper communication using the appropriate PBCH for each frequency band.

[0069] (Aspect 5) Aspect 5 describes the case of including at least some information regarding subcarrier spacing, information regarding cyclic prefix (CP) overhead, and information about the number of antenna ports in NR-PBCHs. Furthermore, for NR-PBCHs that correspond to different frequencies, the number of bits can be defined independently to be used in reporting at least one of the following pieces of information: subcarrier spacing, cyclic prefix (CP) overhead, and antenna port number.

[0070] In the case where the number of candidates for subcarrier spacing, the number of candidates for CP overload, and the number of candidates for the number of antenna ports vary for each frequency band, it is considered that the number of bits used in the user terminal notification also varies for each frequency band. Therefore, considering the number of bits required for each frequency band, the information regarding the number of candidates for subcarrier spacing, the number of candidates for CP overload, and the number of candidates for the number of antenna ports is included in NR-PBCH and transmitted to the user terminal.

[0071] The user terminal performs the reception (scheduled PDSCH reception in PDCCH) of at least the system information, using the subcarrier spacing information, CP overload information, and antenna number port information acquired from the NR-PBCH of a Petition 870190096614, dated 09 / 26 / 2019, page 28 / 66 20 / 54 predetermined frequency band.

[0072] Furthermore, in the case where other subcarrier spacing, CP overload, and antenna port number information are indicated within the system information, RRC signaling notified after establishing an RRC connection, and the like, a higher priority may be given to the newly received indication to apply in addition to the NRPBCH indication. By this means, it is possible to apply different subcarrier spacings, CP overloads, antenna port numbers, and the like between transmission / reception of system information and data communication.

[0073] Alternatively, also in the case of notification by higher layer signaling and similar after receiving the NR-PBCH, in relation to a part of the channel / signal for radiolocation, idle mode measurement and similar, the operation can be controlled by applying the information indicated by the NR-PBCH. By this means, it is possible to apply different subcarrier spacings, CP overloads, antenna port numbers and similar between the signal for radiolocation, idle mode measurement and similar and the signal in communication.

[0074] Furthermore, in NR-PBCH, reserved bits can be configured for future use. In this case, the number of reserved bits can be defined independently (e.g., set to a different value) for each frequency band. Additionally, regarding the number of CRC bits, different values ​​can also be defined for each frequency band. Thus, by defining a plurality of parameters for each frequency band, it is possible to flexibly define the PBCH design for each frequency band.

[0075] <Configuração da banda de frequência> In addition, it is only essential that the frequency band be included in the description. Petition 870190096614, dated 09 / 26 / 2019, page 29 / 66 The aforementioned 21 / 54 refers to a band that corresponds to predetermined frequencies. For example, the band may be a band (band number) defined in a future radio communication system, or it may be a band group (band group number) including a plurality of bands. For example, the independent set is at least one of the size, feature, and contents of a PBCH that (is transmitted) corresponds to each band (or each band group).

[0076] Figure 5 shows an example of NR-PBCH projects to which (are applied) correspond respectively to a band group A, band group B and band group C. Here, the case is shown where band group A corresponds to frequency bands lower than 3.5 GHz, band group B corresponds to frequency bands of 3.5 GHz or more and lower than 6 GHz, and band group C corresponds to frequency bands of 6 GHz or more. As is obvious, the number of band groups and the classification method are not limited to them. Furthermore, the number of bits of each parameter is also an example, and you are not limited to it.

[0077] In band group A, since the number of beams to apply beamforming is sufficiently low compared to band groups B and C, it is possible to decrease the number of bits used in SS block index notification. Furthermore, in band group A, since the maximum carrier bandwidth is assumed to be narrow compared to band groups B and C, it is possible to decrease the number of bits used in control feature set notification. Conversely, in band group C, it is possible to define the number of bits used in SS block index notification and / or the number of bits used in control feature set notification to be higher than in the other band groups.

[0078] In addition, also with regard to the number of reserved bits Petition 870190096614, dated 09 / 26 / 2019, page 30 / 66 22 / 54 defined for provision for future use, the number may be a different value between band groups. For example, in the high-frequency band (band C group in Figure 5), since there is a possibility of the band being extended in the future, a larger number of reserved bits can be ensured than in the other frequency bands.

[0079] Thus, by defining the PBCH for each frequency band and defining the PBCH project independently, since it is possible to notify the user terminal of the PBCH including the necessary information for each frequency band, it is possible to suppress the increase in PBCH overhead.

[0080] In addition, different band numbers can be defined for the same frequency band (e.g., frequency band A) to configure that the different band numbers belong to different band groups. In this case, a user terminal that supports both band numbers (different band numbers) can perform blind detection of a PBCH on initial access, waiting for a configuration of the PBCH defined in each band group.

[0081] (Radio communication system) A configuration of a radio communication system according to an embodiment of the present invention will be described below. In the radio communication system, communication is performed using any of the aspects of the invention mentioned above or a combination thereof.

[0082] Figure 6 is a diagram showing an example of a schematic configuration of the radiocommunication system according to an embodiment of the present invention. In radiocommunication system 1, it is possible to apply carrier aggregation (CA) to aggregate a plurality of base frequency blocks (component carriers) with a system bandwidth (e.g., 20 MHz) of the LTE system as a unit and / or dual Petition 870190096614, dated 09 / 26 / 2019, page 31 / 66 23 / 54 connectivity (DC).

[0083] In addition, radio communication system 1 may be called 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), FRA (Future Radio Access), Nova-RAT (Radio Access Technology) and the like, or may be called a system to upgrade each system described above.

[0084] The radio communication system 1 is provided with a radio base station 11 for forming a macrocell C1 with relatively wide coverage and radio base stations 12 (12a to 12c) arranged within the macrocell C1 to form smaller cells C2 that are narrower than the macrocell C1. In addition, a user terminal 20 is arranged in the macrocell C1 and in each of the smaller cells C2.

[0085] User terminal 20 is capable of connecting to both radio base station 11 and radio base station 12. It is assumed that user terminal 20 simultaneously uses macrocell C1 and small cell C2 using AC or DC. Furthermore, user terminal 20 can apply AC or DC using a plurality of cells (CCs) (e.g., 5 CCs or less, 6 CCs or more).

[0086] User terminal 20 and radio base station 11 are capable of communicating with each other using carriers (referred to as existing carrier, legacy carrier, and the like) with a narrow bandwidth in a relatively low frequency band (e.g., 2 GHz). On the other hand, user terminal 20 and radio base station 12 can use carriers with a wide bandwidth in a relatively high frequency band (e.g., 3.5 GHz, 5 GHz, and the like) or can use the same carrier as radio base station 11. Furthermore, Petition 870190096614, dated 09 / 26 / 2019, p. 32 / 66 24 / 54 The frequency band configuration used at each radio base station is not limited to it.

[0087] It is possible to configure radio base station 11 and radio base station 12 (or two radio base stations 12) to pass through wired connection (e.g., fiber optic in accordance with CPRI (Common Public Radio Interface), X2 interface and similar) or wireless connection.

[0088] Radio base station 11 and each of the radio base stations 12 are respectively connected to a top station device 30, and are connected to a core network 40 through the top station device 30. In addition, for example, the top station device 30 includes an access gateway device, a Radio Network Controller (RNC), a Mobility Management Entity (MME) and the like, but is not limited to these. Furthermore, each of the radio base stations 12 can be connected to the top station device 30 through radio base station 11.

[0089] Furthermore, radio base station 11 is a radio base station having relatively wide coverage, and may be called a macro base station, collection node, eNB (eNodeB), transmit / receive point, and the like. Additionally, radio base station 12 is a radio base station with local coverage, and may be called a small base station, micro base station, pico-base station, femtobase station, HeNB (Initial eNodeB), RRH (Remote Radio Header), transmit / receive point, and the like. Hereafter, in the event of not distinguishing between radio base stations 11 and 12, the stations are collectively referred to as radio base station 10.

[0090] Each user terminal 20 is a terminal that supports various communication schemes, such as LTE and LTE-A, and may include a fixed communication terminal (fixed station) as well as a mobile communication terminal. Petition 870190096614, dated 09 / 26 / 2019, pp. 33 / 66 25 / 54 (mobile station).

[0091] In radio communication system 1, as radio access schemes, Orthogonal Frequency Division Multiple Access (OFDMA) is applied in the downlink and Single Carrier Frequency Division Multiple Access (SC-FDMA) is applied in the uplink.

[0092] OFDMA is a multi-carrier transmission scheme for dividing a frequency band into a plurality of narrow frequency bands (subcarriers) and mapping data to each subcarrier to achieve communication. SC-FDMA is a single-carrier transmission scheme for dividing a system bandwidth into bands consisting of unique or contiguous resource blocks for each terminal, so that a plurality of terminals utilize mutually different bands, thereby reducing interference between terminals. Furthermore, uplink and downlink radio access schemes are not limited to combinations of schemes and other radio access schemes may be used.

[0093] As downlink channels, in radiocommunication system 1 a shared downlink channel (PDSCH: Physical Downlink Shared Channel) is used, shared by user terminals 20, a broadcast channel (PBCH: Physical Broadcast Channel), downlink L1 / L2 control channels and the like. User data, higher-layer control information, SIB (System Information Block) and the like are transmitted on the PDSCH. In addition, MIB (Master Information Block) is transmitted on the PBCH. A common control channel to notify the presence or absence of a radiolocation channel is mapped to the downlink L1 / L2 control channel (e.g., PDCCH), and radiolocation channel (PCH) data is mapped to the PDSCH. Downlink reference signals, downlink reference signals Petition 870190096614, dated 09 / 26 / 2019, pp. 34 / 66 26 / 54 uplink and the physical downlink synchronization signals are allocated separately.

[0094] The L1 / L2 downlink control channel includes PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid ARQ Indicator Channel), and similar channels. Downlink control information (DCI), including PDSCH and PUSCH scheduling information and similar channels, is transmitted on the PDCCH. The number of OFDM symbols used in the PDCCH is transmitted on the PCFICH. Receipt confirmation information (e.g., also referred to as retransmission control information, HARQ-ACK, ACK / NACK, and similar channels) from HARQ (Hybrid Automatic Repeat Request) to PUSCH is transmitted on the PHICH. EPDCCH is frequency division multiplexed with PDSCH (downlink shared data channel) to be used in DCI transmission and similar to PDCCH.

[0095] As uplink channels, in radiocommunication system 1 a shared uplink channel (PUSCH: Physical Uplink Shared Channel) is used, shared by user terminals 20, uplink control channel (PUCCH: Physical Uplink Control Channel), random access channel (PRACH: Physical Random Access Channel) and similar channels. User data and higher-layer control information are transmitted on the PUSCH. In addition, downlink radio quality information (CQI: Channel Quality Indicator), acknowledgment of receipt information and similar information are transmitted on the PUCCH. A random access preamble to establish a connection with the cell is transmitted on the PRACH.

[0096] As downlink reference signals, in the system of Petition 870190096614, dated 09 / 26 / 2019, pp. 35 / 66 27 / 54 radiocommunication 1 transmits Cell-Specific Reference Signal (CRS), Channel State Information Reference Signal (CSI-RS), Demodulation Reference Signal (DMRS), Positioning Reference Signal (PRS), and similar signals. Additionally, as uplink reference signals, the Sounding Reference Signal (SRS), Demodulation Reference Signal (DMRS), and similar signals are transmitted in radiocommunication system 1. Furthermore, the DMRS can be referred to as the UE-Specific Reference Signal. Moreover, the transmitted reference signals are not limited to these.

[0097] (Radio base station) Figure 7 is a diagram showing an example of a complete radio base station configuration according to an embodiment of the present invention. The radio base station 10 is provided with a plurality of transmit / receive antennas 101, amplification sections 102, transmit / receive sections 103, baseband signal processing section 104, call processing section 105 and transmission path interface 106. In addition, with respect to each of the transmit / receive antenna 101, the amplification section 102 and the transmit / receive section 103, the radio base station can be configured to include at least one or more.

[0098] User data to be transmitted to user terminal 20 from radio base station 10 on the downlink is entered into the baseband signal processing section 104 from the upstation device 30 via the transmission path interface 106.

[0099] The baseband signal processing section 104 performs, in user data, transmission processing such as PDCP (Packet Data Convergence Protocol) layer processing, segmentation and concatenation of user data, processing of Petition 870190096614, dated 09 / 26 / 2019, pages 36 / 66 28 / 54 RLC (Radio Link Control) layer transmission such as RLC retransmission control, MAC (Medium Access Control) retransmission control (e.g., HARQ transmission processing), scheduling, transmission format selection, channel coding, Fast Inverse Fourier Transform (IFFT) processing, and precoding processing for transfer to the transmit / receive sections 103. Additionally, also referring to a downlink control signal, section 104 performs transmission processing, such as channel coding and Fast Inverse Fourier Transform on the signal for transfer to the transmit / receive sections 103.

[00100] Each of the transmission / reception sections 103 converts the baseband signal, which is subjected to pre-coding for each antenna and is emitted from the baseband signal processing section 104, into a signal with a radio frequency band for transmission. The radio frequency signal subjected to frequency conversion in the transmission / reception section 103 is amplified in the amplification section 102 and is transmitted from the transmission / reception antenna 101. The transmission / reception section 103 is capable of being composed of a transmitter / receiver, transmission / reception circuit, or transmission / reception apparatus, as explained based on common recognition in the technical field according to the present invention. Furthermore, the transmission / reception section 103 can be understood as an integrated transmission / reception section, or it can consist of a transmission section and a reception section.

[00101] On the other hand, for uplink signals, the radio frequency signals received at the transmit / receive antennas 101 are amplified in the amplification sections 102. The transmit / receive section Petition 870190096614, dated 09 / 26 / 2019, pp. 37 / 66 29 / 54 Section 103 receives the amplified uplink signal from amplification section 102. Transmit / receive section 103 performs frequency conversion on the received signal into a baseband signal to be sent to baseband signal processing section 104.

[00102] For user data included in the incoming uplink signal, the baseband signal processing section 104 performs Fast Fourier Transform (FFT) processing, Discrete Inverse Fourier Transform (IDFT) processing, error correction decoding, MAC relay control reception processing, and RLC layer and PDCP layer reception processing to transfer to the higher station device 30 via the transmission path interface 106. The call processing section 105 performs call processing such as defining and releasing a communication channel, managing base station states 10, and managing radio resources.

[00103] The transmission path interface 106 transmits and receives signals to / from the superior station device 30 through a predetermined interface. In addition, the transmission path interface 106 can transmit and receive signals (backhaul signaling) to / from another radio base station 10 through an interbase station interface (e.g., CPRI (common public radio interface) compliant fiber optic, X2 interface).

[00104] In addition, the transmission / reception section 103 is provided with an analog beamforming section that is configured to be able to apply multibeam approximation and single-beam approximation and provides analog beamforming. In the case of signal transmission of Petition 870190096614, dated 09 / 26 / 2019, pp. 38 / 66 30 / 54 synchronization and / or multibeam approximation radiolocation channel, beam scanning to scan the beam is applied with a single or a plurality of contiguous symbols as a unit. The beamforming section is capable of consisting of a beamforming circuit (e.g., phase shifter, phase deviation circuit) or beamforming apparatus (e.g., displacement device) explained based on common recognition in the technical field according to the present invention. Furthermore, for example, the transmit / receive antenna 101 is capable of consisting of an array antenna.

[00105] The transmission / reception section 103 transmits the synchronization signal (NR-PSS / SSS), the broadcast channel (NR-PBCH), system information (SIB), and similar information. The broadcast channels, which correspond respectively to different frequency bands, are defined independently for at least one of the size, number of resources, and notification content.

[00106] For example, in broadcast channels that correspond respectively to (respectively defined and / or transmitted in) different frequency bands, the number of bits used in reporting information about the number of system frames can be defined independently. Furthermore, broadcast channels that correspond respectively to different frequency bands can be independently defined for the number of bits used in reporting information about the synchronization signal block index.

[00107] In addition, the broadcast channels that correspond respectively to different frequency bands can be independently defined for the number of bits used in notifying information about the set of control resources that are candidates. Petition 870190096614, dated 09 / 26 / 2019, pp. 39 / 66 31 / 54 transmission for the downlink control channel. Furthermore, the broadcast channels corresponding respectively to different frequency bands can be independently defined for the number of bits used in reporting information regarding at least one of the subcarrier spacing, cyclic prefix (CP) overhead, and the number of antenna ports.

[00108] Figure 8 is a diagram showing an example of a radio base station function configuration according to an embodiment of the present invention. Furthermore, this example mainly illustrates function blocks of a characteristic portion in this embodiment, and the radio base station 10 is assumed to have other function blocks necessary for radio communication.

[00109] The baseband signal processing section 104 is provided with at least one control (scheduler) section 301, transmission signal generation section 302, mapping section 303, received signal processing section 304, and measurement section 305. In addition, these components are essentially included in the radio base station 10, and some or all of the components may not be included in the baseband signal processing section 104. The baseband signal processing section 104 is provided with a digital beamforming function to provide digital beamforming.

[00110] The control section (scheduler) 301 performs the control of the entire radio base station 10. The control section 301 is capable of being constituted by a controller, control circuit or control apparatus explained based on common recognition in the technical field according to the present invention.

[00111] For example, control section 301 controls the generation of Petition 870190096614, dated 09 / 26 / 2019, pp. 40 / 66 32 / 54 signals (including the synchronization signal and signals corresponding to the MIB, radiolocation channel and broadcast channel) by the transmission signal generation section 302 and signal allocation by the mapping section 303.

[00112] Control section 310 controls the scheduling (e.g., resource allocation, shared control channel to notify the presence or absence of a radiolocation message, signal to notify multi-beam approach or single-beam approach) of system information (SIB, MIB, etc.), downlink data signals (including radiolocation message PCH) transmitted on the PDSCH, and downlink control signals transmitted on the PDCCH and / or EPDCCH.

[00113] Based on the instructions in control section 301, the transmission signal generation section 302 generates downlink signals (downlink control signal, downlink data signal, downlink reference signal, and the like) to transmit to the mapping section 303. The transmission signal generation section 302 is capable of being constituted by a signal generator, signal generation circuit, or signal generation apparatus explained based on common recognition in the technical field according to the present invention.

[00114] For example, based on the instructions in the control section 301, the transmission signal generation section 302 generates DL assignment to notify downlink signal assignment information and UL assignment to notify uplink signal assignment information. Furthermore, the downlink data signal undergoes encoding and modulation processing according to an encoding rate, modulation scheme, and similar determined based on the channel state information (CSI) of each user terminal 20. Additionally, based on the instructions in control section 301, the section of Petition 870190096614, dated 09 / 26 / 2019, pp. 41 / 66 33 / 54 Transmission signal generation 302 generates a signal to notify multibeam approach or singlebeam approach on the common control channel including the MIB or system information that corresponds to the MIB.

[00115] Based on the instructions in control section 301, mapping section 303 maps the downlink signal generated in transmission signal generation section 302 to predetermined radio resources to transmit to transmission / reception section 103. Mapping section 303 is capable of being composed of a mapper, mapping circuit or mapping apparatus explained based on common recognition in the technical field according to the present invention.

[00116] The received signal processing section 304 performs reception processing (e.g., demapping, demodulation, decoding, and the like) on the received signal input of the transmission / reception section 103. Here, for example, the received signal is the uplink signal (uplink control signal, uplink data signal, uplink reference signal, and the like) transmitted from the user terminal 20. The received signal processing section 304 is capable of being constituted by a signal processor, signal processing circuit, or signal processing apparatus explained based on common recognition in the technical field according to the present invention.

[00117] The received signal processing section 304 transmits the information decoded by the reception processing to the control section 301. For example, in the case of receiving the PUCCH including HARQ-ACK, section 304 transmits the HARQ-ACK to the control section 301. In addition, the received signal processing section 304 transmits the received signal and the signal subjected to reception processing to the measurement section 305. Petition 870190096614, dated 09 / 26 / 2019, pp. 42 / 66 34 / 54

[00118] Measurement section 305 performs the measurement on the received signal. Measurement section 305 is capable of being constituted by a measuring device, measuring circuit or measuring apparatus explained based on common recognition in the technical field according to the present invention.

[00119] For example, measurement section 305 can measure received power (e.g., RSRP (Received Power of the Reference Signal)), received quality (e.g., RSRQ (Received Quality of the Reference Signal)), SINR (Signal-to-Noise Ratio), channel status, and similar values ​​of the received signal. The measurement result can be sent to control section 301.

[00120] (User terminal) Figure 9 is a diagram showing an example of a complete user terminal configuration according to an embodiment of the present invention. The user terminal 20 is provided with a plurality of transmit / receive antennas 201, amplification sections 202, transmit / receive sections 203, baseband signal processing section 204, and application section 205. Additionally, with respect to each of the transmit / receive antennas 201, amplification section 202, and transmit / receive section 203, the user terminal can be configured to include at least one or more.

[00121] The radio frequency signals received at the transmit / receive antennas 201 are amplified respectively in the amplification sections 202. Each of the transmit / receive sections 203 receives the amplified downlink signal from the amplification section 202. The transmit / receive section 203 performs frequency conversion on the received signal into a baseband signal to transmit to the baseband signal processing section 204. The transmit / receive section 203 is capable of being Petition 870190096614, dated 09 / 26 / 2019, pp. 43 / 66 35 / 54 consisting of a transmitter / receiver, transmission / reception circuit or transmission / reception apparatus explained based on common recognition in the technical field according to the present invention. Furthermore, the transmission / reception section 203 can be understood as an integrated transmission / reception section, or it can consist of a transmission section and a reception section.

[00122] The baseband signal processing section 204 performs FFT processing, error correction decoding, retransmission control reception processing, and similar operations on the incoming baseband signal. User data on the downlink is transferred to the application section 205. The application section 205 performs processing with respect to higher layers beyond the physical layer and the MAC layer, and similar operations. In addition, broadcast information is also transferred to the application section 205 among the downlink data.

[00123] On the other hand, for uplink user data, the data is introduced into the baseband signal processing section 204 from the application section 205. The baseband signal processing section 204 performs transmission processing of the retransmission control (e.g., HARQ transmission processing), channel coding, pre-coding, Discrete Fourier Transform (DFT) processing, IFFT processing, and the like to transfer to each of the transmit / receive sections 203. Each of the transmit / receive sections 203 converts the baseband signal output from the baseband signal processing section 204 into a signal with a radio frequency band for transmission. The radio frequency signals undergoing frequency conversion in the transmit / receive sections 203 are Petition 870190096614, dated 09 / 26 / 2019, pp. 44 / 66 36 / 54 amplified in amplification sections 202 and transmitted from transmit / receive antennas 201, respectively.

[00124] In addition, the transmission / reception section 203 may additionally have an analog beamforming section to perform analog beamforming. The analog beamforming section is capable of being composed of an analog beamforming circuit (e.g., phase shifter, phase deviation circuit) or an analog beamforming apparatus (e.g., phase shift device) explained based on common recognition in the technical field according to the present invention. Furthermore, for example, the transmission / reception antenna 201 is capable of being constituted by an array antenna.

[00125] The transmission / reception section 203 receives the synchronization signal (NR-PSS / SSS), the broadcast channel (NR-PBCH), system information (SIB), and similar signals. The broadcast channels, which correspond respectively to different frequency bands, are defined independently for at least one of the size, number of resources, and notification content.

[00126] Figure 10 is a diagram showing an example of a user terminal function configuration according to an embodiment of the present invention. Furthermore, this example mainly illustrates function blocks of a characteristic portion in this embodiment, and the user terminal 20 is assumed to have other function blocks necessary for radio communication.

[00127] The baseband signal processing section 204 that the user terminal 20 has is provided with at least one control section 401, transmission signal generation section 402, mapping section 403, signal processing section 404, and measurement section 405. In addition, these Petition 870190096614, dated 09 / 26 / 2019, pages 45 / 66 37 / 54 components are essentially included in the user terminal 20, and some or all of the components may not be included in the baseband signal processing section 204.

[00128] Control section 401 performs the control of the entire user terminal 20. Control section 401 is capable of being constituted by a controller, control circuit or control apparatus explained based on common recognition in the technical field according to the present invention.

[00129] For example, control section 401 controls signal generation by transmission signal generation section 402 and signal allocation by mapping section 403. In addition, control section 401 controls signal reception processing by received signal processing section 404 and signal measurement by measurement section 405.

[00130] Control section 401 controls the reception of the broadcast channel in each frequency band. The broadcast channels corresponding to different frequency bands are defined independently for at least one of the size, number of resources, and notification content.

[00131] For example, in broadcast channels that correspond respectively (respectively defined and / or received in) to different frequency bands, the number of bits used in reporting information about the system frame number can be defined independently. Furthermore, broadcast channels that correspond respectively to different frequency bands can be independently defined for the number of bits used in reporting information about the synchronization signal block index.

[00132] In addition, the broadcast channels that correspond Petition 870190096614, dated 09 / 26 / 2019, pages 46 / 66 38 / 54 respectively to different frequency bands can be independently defined for the number of bits used in reporting information about the set of control resources that are candidates for transmission to the downlink control channel. Furthermore, the broadcast channels corresponding respectively to different frequency bands can be independently defined for the number of bits used in reporting information about at least one of the subcarrier spacings, cyclic prefix (CP) overhead, and the number of antenna ports.

[00133] In other words, the number of bits used in notifying at least one piece of information described here can be independently defined (notified) to user terminal 20 from radio base station 10, for each of the broadcast channels that correspond respectively to different frequency bands.

[00134] Based on the instructions in control section 401, transmission signal generation section 402 generates uplink signals (uplink control signal, uplink data signal, uplink reference signal, and the like) to transmit to mapping section 403. Transmission signal generation section 402 is capable of being constituted by a signal generator, signal generation circuit, or signal generation apparatus explained based on common recognition in the technical field according to the present invention.

[00135] Based on the instructions in control section 401, for example, the transmission signal generation section 402 generates the uplink control signal regarding the reception confirmation information and channel status information (CSI). Furthermore, based on the instructions in control section 401, the transmission signal generation section 402 generates the Petition 870190096614, dated 09 / 26 / 2019, pp. 47 / 66 39 / 54 uplink data signal. For example, when the downlink control signal reported from radio base station 10 includes the UL grant, the transmission signal generation section 402 is instructed to generate the uplink data signal from control section 401.

[00136] Based on the instructions in control section 401, mapping section 403 maps the uplink signal generated in transmission signal generation section 402 to radio resources to transmit to transmission / reception section 203. Mapping section 403 is capable of being constituted by a mapper, mapping circuit or mapping apparatus explained based on common recognition in the technical field according to the present invention.

[00137] The received signal processing section 404 performs reception processing (e.g., demapping, demodulation, decoding, and the like) on the received signal input of the transmission / reception section 203. Here, for example, the received signal is the downlink signal (downlink control signal, downlink data signal, downlink reference signal, and the like) transmitted from the radio base station 10. The received signal processing section 404 is capable of being constituted by a signal processor, signal processing circuit, or signal processing apparatus explained based on common recognition in the technical field according to the present invention.

[00138] Based on the instructions from control section 401, the received signal processing section 404 receives the synchronization signal and the broadcast channel, to which the radio base station applies beamforming and transmission. In particular, the section receives the synchronization signal and the broadcast channel assigned to at least one of a plurality of time regions. Petition 870190096614, dated 09 / 26 / 2019, pp. 48 / 66 40 / 54 (e.g., symbols) that constitute a predetermined transmission time interval (e.g., subframe or slot).

[00139] The received signal processing section 404 transmits the information decoded by the reception processing to the control section 401. For example, the received signal generation section 404 transmits broadcast information, system information, RRC signaling, DCI and similar information to the control section 401. In addition, the received signal processing section 404 transmits the received signal and the signal subjected to reception processing to the measurement section 405.

[00140] Measurement section 405 performs measurement on the received signal. For example, measurement section 405 performs measurement using RS for beamforming transmitted from radio base station 10. Measurement section 405 is capable of being constituted by a measuring device, measuring circuit or measuring apparatus explained based on common recognition in the technical field according to the present invention.

[00141] For example, measurement section 405 can measure received power (e.g. RSRP), received quality (e.g., RSRQ, received SINR), channel status, and similar aspects of the received signal. The measurement result can be sent to control section 401.

[00142] (Hardware configuration) Furthermore, the block diagrams used in explaining the aforementioned embodiment show blocks on a function-by-function basis. These function blocks (configuration sections) are updated by any combination of hardware and / or software. Moreover, the means of updating each function block are not particularly limited. In other words, each function block can be updated by a single device combined physically and / or logically, or by two or more separate devices. Petition 870190096614, dated 09 / 26 / 2019, pp. 49 / 66 41 / 54 are physically and / or logically connected directly and / or indirectly (e.g., by cable and / or radio) and each function block can be updated by a plurality of these devices.

[00143] For example, each radio base station, user terminal and the like in an embodiment of the present invention can function as a computer that performs the processing of the radio communication method of the invention. Figure 11 is a diagram showing an example of a hardware configuration of each radio base station and user terminal according to an embodiment of the invention. Each of the radio base stations 10 and user terminal 20 as described above can be physically configured as a computer apparatus including a processor 1001, memory 1002, storage 1003, communication apparatus 1004, input apparatus 1005, output apparatus 1006, bus 1007 and the like.

[00144] In addition, in the following description, it is possible to replace the device letter with a circuit, device, unit, and similar terms to be read. With respect to each device shown in the figure, the hardware configuration of each of the base radio stations 10 and user terminal 20 can be configured to include a single or multiple device, or it can be configured without including a portion of the devices.

[00145] For example, a single 1001 processor is shown in the figure, but a plurality of processors may exist. Furthermore, processing may be performed by a single processor, or it may be performed by one or more processors simultaneously, sequentially, or by another technique. Additionally, the 1001 processor may be implemented on one or more chips.

[00146] For example, each function on radio base station 10 and Petition 870190096614, dated 09 / 26 / 2019, pages 50 / 66 42 / 54 user terminal 20 updated in such a way that the predetermined software (program) is read from the processor hardware 1001, memory 1002 and the like, and that the processor 1001 thus performs computations and controls communication through the communication device 1004 and reads and / or writes data in memory 1002 and storage 1003.

[00147] For example, processor 1001 operates an operating system to control the entire computer. Processor 1001 may consist of a Central Processing Unit (CPU) including interfaces with peripheral devices, control devices, computing devices, registers and the like. For example, the aforementioned baseband signal processing section 104 (204), the call processing device 105 and the like may be updated by processor 1001.

[00148] Furthermore, processor 1001 reads the program (program code), software module, data and the like in memory 1002 from storage 1003 and / or the communication device 1004, and accordingly performs various types of processing. Used as the program is a program that causes the computer to perform at least part of the operation described in the aforementioned embodiment. For example, the control section 401 of user terminal 20 can be updated by a control program stored in memory 1002 to operate on processor 1001, and the other function blocks can be updated similarly.

[00149] Memory 1002 is a computer-readable storage medium and, for example, may consist of at least one ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable EPROM), RAM (Random Access Memory), and other suitable storage media. Memory 1002 may be referred to as a register, cache, main memory (main storage device), and Petition 870190096614, dated 09 / 26 / 2019, pp. 51 / 66 43 / 54 similar. Memory 1002 is capable of storing the program (program code), the software module and the similar executable to implement the radio communication method according to an embodiment of the present invention.

[00150] Storage 1003 is a computer-readable storage medium and, for example, may consist of at least one floppy disk, diskette (registered trademark), magneto-optical disk (e.g., compact disc (CD-ROM (compact disc ROM), etc.), digital multipurpose disk, Blu-ray disc (registered trademark), removable disk, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, and other suitable storage media. Storage 1003 may be referred to as an auxiliary storage device.

[00151] Communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network and, for example, is also referred to as a network device, network controller, network card, communication module and the like. For example, in order to upgrade Frequency Division Duplex (FDD) and / or Time Division Duplex (TDD), communication device 1004 can be understood to include a high-frequency switch, duplexer, filter, frequency synthesizer and the like. For example, the transmission / reception antenna 101 (201), the amplification section 102 (202), the transmission / reception section 103 (203), the transmission path interface 106 and the like as described above can be upgraded by communication device 1004.

[00152] Input device 1005 is an input device (e.g., keyboard, mouse, microphone, switch, button, sensor, and the like) that Petition 870190096614, dated 09 / 26 / 2019, pp. 52 / 66 44 / 54 receives input from the outside. Output device 1006 is an output device (e.g., display, speaker, LED (Light Emitting Diode) lamp, and similar) that performs the output to the outside. Additionally, input device 1005 and output device 1006 can be an integrated configuration (e.g., touch panel).

[00153] In addition, each device of the 1001 processor, memory Devices 1002 and similar devices are connected to bus 1007 to communicate information. Bus 1007 may consist of a single bus, or it may be composed of different buses between devices.

[00154] In addition, each of the base stations 10 and 20 can be configured including hardware such as a microprocessor, digital signal processor (DSP), ASIC (Application-Specific Integrated Circuit), PLD (Programmable Logic Device), and FPGA (Field-Programmable Gate Array), or a part or all of each function block can be upgraded by the hardware. For example, the 1001 processor can be implemented by at least one of the hardware.

[00155] (Modification) Furthermore, the term explained in this description and / or the term necessary to understand this description may be replaced by a term with the same or similar meaning. For example, the channel and / or symbol may be a signal. Additionally, the signal may be a message. The reference signal may be abbreviated as RS (Reference Signal), and according to the standard to be applied, may be called a pilot, pilot signal, and the like. Furthermore, a component carrier (CC) may be called a cell, frequency carrier, carrier frequency, and the like.

[00156] In addition, the radio panel may consist of a Petition 870190096614, dated 09 / 26 / 2019, pp. 53 / 66 45 / 54 single or a plurality of frames in the time domain. The single frame or each of the plurality of frames that constitute the radio frame can be called a subframe. Furthermore, the subframe can be composed of a single or a plurality of time domain slots. Additionally, the slot can be composed of a single or a plurality of time domain symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, and similar symbols).

[00157] Each radio frame, subframe, slot, and symbol represents a unit of time in the transmission of a signal. For the radio frame, subframe, slot, and symbol, another name corresponding to each of them may be used. For example, a subframe may be called a Transmission Time Interval (TTI), a plurality of contiguous subframes may be called a TTI, or a slot may be called a TTI. In other words, the subframe and the TTI may be the subframe (1 ms) in existing LTE, may be a frame (e.g., 1 to 13 symbols) smaller than 1 ms, or may be a frame larger than 1 ms.

[00158] Here, for example, TTI refers to a minimum time unit of scheduling in radiocommunication. For example, in the LTE system, the radio base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, and similar resources capable of being used by each user terminal) to each user terminal in one TTI unit. Furthermore, the definition of TTI is not limited to these. TTI can be a transmission time unit of a data packet (transport block) subject to channel coding, or it can be a processing unit for scheduling, link adaptation, and similar tasks. Petition 870190096614, dated 09 / 26 / 2019, pages 54 / 66 46 / 54

[00159] A TTI with a duration of 1 ms may be called a common TTI (TTI in LTE Rel.8-12), normal TTI, long TTI, ordinary subframe, normal subframe, long subframe, or similar. A TTI shorter than the common TTI may be called a reduced TTI, short TTI, reduced subframe, short subframe, or similar.

[00160] A resource block (RB) is a unit of resource allocation in the time domain and frequency domain, and may include a single or a plurality of contiguous subcarriers in the frequency domain. Furthermore, an RB may include a single or a plurality of symbols in the time domain and may have a length of 1 slot, 1 subcarrier, or 1 TTI. Each of 1 TTI and 1 subframe may be composed of a single or a plurality of resource blocks. Additionally, an RB may be referred to as a physical resource block (PRB: physical RB), PRB pair, RB pair, and similar terms.

[00161] In addition, the feature block can be composed of a single or a plurality of feature elements (RE: Feature Element). For example, 1 RE can be a radio feature region of 1 subcarrier and 1 symbol.

[00162] Furthermore, the radio frame, subframe, slot, and symbol structures mentioned above are merely illustrative. For example, it is possible to modify, in various ways, the settings for the number of subframes included in the radio frame, the number of partitions included in the subframe, the number of symbols and RBs included in the slot, the number of subcarriers included in the RB, the number of symbols within the TTI, the symbol length, the cyclic prefix (CP) length, and similar settings.

[00163] In addition, the information, parameters and the like explained in this description may be expressed as an absolute value, may be expressed as a relative value of a predetermined value, or Petition 870190096614, dated 09 / 26 / 2019, pages 55 / 66 47 / 54 can be expressed by other corresponding information. For example, the radio feature can be indicated by a predetermined index. Furthermore, the equations using these and similar parameters may differ from those explicitly described in this description.

[00164] The names used in the parameter and similar ones in this description are not restrictive in any respect. For example, it is possible to identify various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel)) and information elements by any suitable names, and therefore, various names assigned to these various channels and information elements are not restrictive in any respect.

[00165] The information, signal and similar things explained in this description can be represented using any of several different techniques. For example, the data, order, command, information, signal, bit, symbol, chip and similar things, which can be described throughout the above-mentioned explanation, can be represented by voltage, current, electromagnetic wave, magnetic field or magnetic particle, optical field or photon, or any combination thereof.

[00166] Furthermore, information, signals, and similar elements can be transmitted from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, and similar elements can be introduced and transmitted through a plurality of network nodes.

[00167] Input / output, signal, and similar information can be stored in a specific location (e.g., memory) or managed with a management table. Input / output, signal, and similar information can be rewritten, updated, or edited. Output, signal, and similar information can be deleted. Petition 870190096614, dated 09 / 26 / 2019, pages 56 / 66 48 / 54 input, signal and similar can be transmitted to another device.

[00168] The notification of information is not limited to the aspects / modalities described in this description, and may be performed by another method. For example, the notification of information may be performed using physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI), higher layer signaling (e.g., RRC (Radio Resource Control) signaling), broadcast information (Master Information Block) (MIB), System Information Block (SIB) and the like), MAC (Media Access Control) signaling), other signals, or a combination thereof.

[00169] In addition, physical layer signaling may be referred to as L1 / L2 control information (Layer 1 / Layer 2) (L1 / L2 control signal), L1 control information (L1 control signal), and similar terms. Furthermore, RRC signaling may be referred to as RRC message and, for example, may be RRC connection adjustment (Reconnection Adjustment), RRC connection reconfiguration message (Reconnection Reconfiguration), and similar terms. Additionally, for example, MAC signaling may be notified by the MAC Control Element (MAC CE).

[00170] Furthermore, notification of predetermined information (e.g., notification of being X) is not limited to notification that is performed explicitly and may be performed implicitly (e.g., notification of predetermined information is not performed or by notification of different information).

[00171] The decision can be made with a value (“0” or “1”) expressed by 1 bit, it can be made with a boolean value represented by true or false, or it can be made by comparison with a numeric value (for example, Petition 870190096614, dated 09 / 26 / 2019, pages 57 / 66 49 / 54 comparison with a predetermined value).

[00172] Regardless of whether software is called software, firmware, middleware, microcode, a hardware descriptive term, or another name, software should be broadly interpreted as a command, set of commands, code, code segment, program code, program, subprogram, software module, application, software application, software package, routine, subroutine, object, executable file, execution thread, procedure, function, and the like.

[00173] In addition, software, commands, information, and the like can be transmitted and received through a transmission medium. For example, when software is transmitted from a website, server, or other remote source using wired techniques (coaxial cable, fiber optic cable, twisted pair, digital subscriber lines (DSL), and the like) and / or wireless techniques (infrared, microwave, and the like), these wired and / or wireless techniques are included in the definition of the transmission medium.

[00174] The terms system and network used in this description are used interchangeably.

[00175] In this description, the terms Base Station (BS), radio base station, eNB, cell, sector, cell group, carrier and component carrier are capable of being used interchangeably. This is the case where the base station is referred to by the terms fixed station, Node B, eNodeB (eNB), access point, transmit point, receive point, femtocell, small cell and the like.

[00176] The base station is capable of accommodating a single cell or a plurality of cells (for example, three) (also called sectors). When the base station accommodates a plurality of cells, the entire coverage area of ​​the base station can be divided into several smaller areas, and each of them Petition 870190096614, dated 09 / 26 / 2019, pages 58 / 66 50 / 54 of the smaller areas is also capable of providing communication services through a base station subsystem (e.g., small base station (RRH: Remote Radio Header) for indoor use). The term cell or sector refers to a part or all of the coverage area of ​​the base station and / or base station subsystem that performs communication services within the coverage area.

[00177] In this description, the terms “Mobile Station (MS)”, “user terminal”, “User Equipment (UE)” and “terminal” may be used interchangeably. This is the case where the base station is referred to by terms such as fixed station, Node B, eNode B (eNB), access point, transmission point, reception point, femto-cell, small cell and the like.

[00178] This is the case where the mobile station may be referred to using a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, telephone apparatus, user agent, mobile client, client, or some other suitable terms, by those skilled in the art.

[00179] Furthermore, the radio base station in the present description can be read as the user terminal. For example, each aspect / embodiment of the present invention can be applied to a configuration where communication between the radio base station and the user terminal is replaced by communication between a plurality of user terminals (D2D: Device to Device). In this case, the functions that the aforementioned radio base station 10 has can be the configuration that the user terminal 20 has. Furthermore, the words “up”, “down” and the like can be read as “lateral”. For example, the uplink channel can be read as a Petition 870190096614, dated 09 / 26 / 2019, pages 59 / 66 51 / 54 side channel.

[00180] Similarly, the user terminal in this description can be read with the radio base station. In this case, the functions that the user terminal 20 mentioned above has can be the configuration that the radio base station 10 has.

[00181] In the present description, the particular operation performed by the base station may be performed by the top node in some cases. In a network composed of a single or a plurality of network nodes having the base station, it is obvious that various operations performed for communication with the terminal are performed by the base station, one or more network nodes (for example MME (Mobility Management Entity), SGW (Gateway Server) and the like are considered, but the invention is not limited to them, except the base station, or their combination.

[00182] Each aspect / modality explained in this description can be used alone, can be used in combination, or can be switched and used according to the execution. Furthermore, with respect to the processing procedure, sequence, flowchart and the like of each aspect / modality explained in this description, unless there is a contradiction, the order may be altered. For example, with respect to the methods explained in this description, the elements of various steps are presented in illustrative order, and are not limited to the particular order presented.

[00183] Each aspect / modality explained in this description can be applied to 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), FRA (Future Radio Access), Nova-RAT (New Radio Access Technology), NR (New Radio), NX Petition 870190096614, dated 09 / 26 / 2019, pages 60 / 66 52 / 54 (New Radio Access), FX (Next Generation Radio Access), GSM (Registered Trademark) (Global System for Mobile Communications), CDMA 2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (Registered Trademark)), IEEE 802.16 (WiMAX (Registered Trademark)), IEEE 802.20, UWB (Ultra Wideband), Bluetooth (Registered Trademark), system using another appropriate radiocommunication method and / or the next-generation extended system based on it.

[00184] The description of “based on” used in this description does not mean “based only on”, unless otherwise specified. In other words, the description of “based on” means both “based only on” and “based on at least”.

[00185] Any references to elements using designations of “first,” “second,” and the like used in this description are not intended to limit the quantity or order of such elements in general. These designations may be used in this description as a useful method of distinguishing between two or more elements. Similarly, references to first and second elements do not mean that only two elements are adopted, or that the first element must precede the second element in any way.

[00186] There is a case where the term "determining" used in this description includes several types of operation. For example, "determining" can be considered as determining calculation, computation, processing, derivation, investigation, search (e.g., searching in a table, database, or other data structure), verification, and the like. Furthermore, "determining" can be considered as determining reception (e.g., receiving information), transmission (e.g., transmitting information), input, output, access (e.g., accessing data in memory), and the like. Additionally, "determining" can be considered as determining Petition 870190096614, dated 09 / 26 / 2019, pages 61 / 66 53 / 54 to resolve, select, choose, establish, compare and similar. In other words, to determine can be considered as determining some operation.

[00187] The terms connected and coupled used in this description or any modification thereof mean directly or indirectly any connection or coupling between two or more elements, and are capable of including the existence of one or more intermediate elements between two mutually connected or coupled elements. The coupling or connection between elements may be physical, may be logical, or may be a combination thereof. In the case of use in this description, it is possible to consider that two elements are mutually connected or coupled using one or more electrical wires, cables and / or electrical printing connection, and as some non-limited and non-inclusive examples, electromagnetic energy such as electromagnetic energy having wavelengths in a radio frequency region, microwave region and light (visible and invisible).

[00188] In the case of using including, comprising and their modifications in the present description and in the scope of the claims, as in the term supplied with, these terms shall be inclusive. Furthermore, the term of or used in the present description and in the scope of the claims is intended to be exclusive of OR.

[00189] As described above, the present invention is specifically described, but it is obvious to a person skilled in the art that the invention is not limited to the embodiment described in this description. The invention is capable of being carried out in such embodiment as modified and altered aspects without departing from the subject matter and scope of the invention as defined by the descriptions in the scope of the claims. Therefore, the descriptions in this description are for illustrative purposes only and are not restrictive to the present invention. Petition 870190096614, dated 09 / 26 / 2019, pp. 62 / 66 54 / 54 invention.

[00190] This application is based on the Japanese Patent Application No. 2017-019066 filed on February 3, 2017, the full content of which is expressly incorporated by reference herein. Petition 870190096614, dated 09 / 26 / 2019, pages 63 / 66

Claims

1 / 2 CLAIMS 1. Terminal (20) characterized in that it comprises: a receiving section (203) configured to receive a synchronization signal block / broadcast channel, SS / PBCH, including a broadcast channel comprising a number of bits of a synchronization signal block index, wherein the number of bits is different depending on the frequency band used for transmission between a number of predetermined frequency bands; and a control section (401) configured to determine a synchronization signal block index of the SS / PBCH block in a frequency band based on the bits of the synchronization signal block index included in the broadcast channel.

2. Terminal (20), according to claim 1, characterized in that the number of bits used for a first frequency band of the frequency bands is greater than the number of bits used for a second frequency band of the frequency bands, wherein the second frequency band has a frequency lower than that of the first frequency band.

3. A radiocommunication method characterized in that it comprises: receiving a synchronization signal block / broadcast channel, SS / PBCH, including a broadcast channel comprising a number of bits of a synchronization signal block index, wherein the number of bits differs depending on the frequency band used for transmission between a number of predetermined frequency bands; and determining a synchronization signal block index of the SS / PBCH block in a frequency band based on the bits of the synchronization signal block index included in the broadcast channel.

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