Terminal, base station, wireless communication method and system

Abstract

To reduce load and / or delay of an UE, in a next-generation wireless communication system performing communication by using a different configuration from existing LTE system.SOLUTION: A user terminal receives a first synchronization signal (PSS), a second synchronization signal (SSS), and a broadcast channel (PBCH) in a SS / PBCH block configured with contiguous 4 symbols and predetermined number of subcarriers. The PSS and SSS are arranged on a first frequency domain, the PBCH is arranged on a second frequency domain wider than the first frequency domain, the PBCH is arranged in a first predetermined region adjacent to the SSS in frequency direction and not arranged in a second predetermined region adjacent to the PSS in frequency direction, the PBCH includes a first part of the PBCH arranged on the second frequency domain of a symbol, different from the PSS and the SSS, and a second part of the PBCH arranged in the first predetermined region of a symbol same as the SSS, and the PBCH is not arranged in the same symbol as the PSS.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to a terminal, a base station, and a wireless communication method and system in a next-generation mobile communication system. [Background technology]

[0002] In a Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of achieving higher data rates and lower latency (Non-Patent Document 1). Also, for the purpose of achieving wider bandwidth 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) has been specified, and a successor system to LTE (for example, 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 or later, etc.) is also being considered.

[0003] LTE Rel.10 / 11 introduces Carrier Aggregation (CA) that aggregates multiple Component Carriers (CCs) to achieve wider bandwidth. Each CC is configured with the LTE Rel.8 system band as a unit. In CA, multiple CCs of the same radio base station (eNB: eNodeB) are configured in a user terminal (UE: User Equipment).

[0004] Meanwhile, LTE Rel.12 also introduces dual connectivity (DC), in which multiple cell groups (CGs) of different radio base stations are set for a UE. Each cell group is composed of at least one cell (or CC). In DC, multiple CCs of different radio base stations are integrated, so DC is also called inter-eNB CA.

[0005] In addition, in existing LTE systems (e.g., LTE Rel. 8-13), synchronization signals (PSS / SSS), broadcast channels (PBCH), and the like used by user terminals for initial access operations are assigned to regions that are fixedly defined in advance. By detecting the synchronization signal through cell search, the user terminal can synchronize with the network and identify the cell (e.g., cell ID) to which the user terminal is connected. In addition, by receiving broadcast channels (PBCH and SIB) after cell search, the user terminal can obtain system information. [Prior art documents] [Non-patent literature]

[0006] [Non-Patent Document 1] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention [Problem to be solved by the invention]

[0007] Future wireless communication systems (e.g., 5G, NR) are expected to realize various wireless communication services that satisfy different requirements (e.g., ultra-high speed, large capacity, ultra-low latency, etc.). For example, in 5G / NR, wireless communication services called eMBB (enhanced Mobile Broadband), IoT (Internet of Things), mMTC (massive Machine Type Communication), M2M (Machine To Machine), URLLC (Ultra Reliable and Low Latency Communications), etc. are being considered.

[0008] In addition, 5G / NR is required to support flexible numerology and frequency usage and realize dynamic frame configuration. Here, numerology refers to communication parameters in the frequency direction and / or time direction (e.g., at least one of subcarrier spacing (subcarrier spacing), bandwidth, symbol length, CP time length (CP length), subframe length, TTI time length (TTI length), number of symbols per TTI, radio frame configuration, filtering process, windowing process, etc.).

[0009] However, when numerology (subcarrier spacing, bandwidth, etc.) different from that of the existing LTE system is supported, how to control the transmission and reception of each signal becomes an issue. In 5G / NR, services are being considered to be provided using a very high carrier frequency of 100 GHz, and it is assumed that DL transmission will be transmitted in a way different from that of the existing LTE system.

[0010] For example, it is assumed that DL signals such as a synchronization signal and a broadcast channel used for initial access etc. will be transmitted using a configuration (e.g., a different mapping method) different from that of the existing LTE system. In this case, it is desirable to use a signal configuration that can reduce the load and / or delay at the time of initial access of the UE.

[0011] Therefore, one of the objectives of the present disclosure is to provide a terminal, a base station, a wireless communication method and a system that can reduce the load and / or delay on a UE in a wireless communication system that communicates using a configuration different from that of existing LTE systems. [Means for solving the problem]

[0012] A terminal according to one embodiment of the present disclosure has a control unit that controls reception of a first synchronization signal (PSS), a second synchronization signal (SSS), and a broadcast channel (PBCH) in an SS / PBCH block consisting of four consecutive symbols and a predetermined number of subcarriers, and a receiving unit that receives the PSS, the SSS, and the PBCH that form the SS / PBCH block, wherein the PSS and the SSS are arranged in a first frequency domain, and the PBCH is arranged in at least a part of a second frequency domain that is wider than the first frequency domain, and in the SS / PBCH block, the PBCH is arranged in at least a part of a first predetermined domain adjacent to the SSS in the frequency direction, and is not arranged in a second predetermined domain adjacent to the PSS in the frequency direction, and the PBCH includes a first part of the PBCH arranged in the second frequency domain in a symbol different from the PSS and the SSS, and a second part of the PBCH arranged in at least a part of the first predetermined domain in the same symbol as the SSS, and the PBCH is not arranged in the same symbol as the PSS. Effect of the Invention

[0013] According to one aspect of the present disclosure, it is possible to reduce the load and / or delay of a UE in a wireless communication system that performs communication using a configuration different from that of an existing LTE system. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a diagram illustrating an example of an SS / PBCH block. [Diagram 2] A diagram showing an example of the relationship between SS rasters and PBCH bandwidth. [Diagram 3]FIG. 2 is a diagram showing an example of an SS / PBCH block according to the present embodiment. [Figure 4] FIG. 11 is a diagram showing another example of an SS / PBCH block according to the present embodiment. [Diagram 5] FIG. 11 is a diagram showing another example of an SS / PBCH block according to the present embodiment. [Figure 6] FIG. 11 is a diagram showing another example of an SS / PBCH block according to the present embodiment. [Figure 7] FIG. 11 is a diagram showing another example of an SS / PBCH block according to the present embodiment. [Figure 8] FIG. 11 is a diagram showing another example of an SS / PBCH block according to the present embodiment. [Figure 9] 1 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 10] FIG. 2 is a diagram illustrating an example of an overall configuration of a wireless base station according to an embodiment. [Figure 11] FIG. 2 is a diagram illustrating an example of a functional configuration of a radio base station according to an embodiment. [Figure 12] FIG. 2 is a diagram illustrating an example of an overall configuration of a user terminal according to an embodiment. [Figure 13] FIG. 2 illustrates an example of a functional configuration of a user terminal according to an embodiment. [Figure 14] A diagram illustrating an example of the hardware configuration of a radio base station and a user terminal according to one embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] In the initial access process of the existing LTE system, a user terminal can detect at least time-frequency synchronization and a cell identifier (cell ID) by detecting a synchronization signal (PSS / SSS). After the user terminal is synchronized with the network and acquires the cell ID, it receives a broadcast channel (broadcast channel (e.g., PBCH)) including system information. Following the detection of the synchronization signal and demodulation of the broadcast channel, for example, reception of a system information block (SIB) and transmission of a physical random access channel (PRACH) are performed.

[0016] In this way, in the existing LTE system, a user terminal receives system information (broadcast information) necessary for downlink communication in a master information block (MIB) transmitted on a broadcast channel (PBCH), etc. The broadcast channel (LTE-PBCH) of the existing LTE system is transmitted in subframe #0 of each radio frame at 10 msec intervals in a central band of 1.4 MHz (center 6 RBs).

[0017] In the PBCH (MIB), information required for receiving the downlink (downlink bandwidth, downlink control channel configuration, system frame number (SFN), etc.) is specified in a predetermined number of bits. The user terminal controls the reception of SIBs (System Information Blocks) transmitted on the downlink shared data channel (PDSCH) based on the LTE-PBCH. By receiving the SIBs, the user terminal can obtain the minimum system information required for communication.

[0018] In addition, the allocation positions of the synchronization signal (LTE-PSS / SSS) and the broadcast channel (LTE-PBCH) in the existing LTE system are fixed in terms of time and frequency resources. Specifically, the LTE-PSS / SSS and the broadcast channel are mapped to the same frequency domain (for example, 6RBs with a center frequency) and transmitted. In this way, the LTE-PSS / SSS and LTE-PBCH are transmitted from the radio base station using fixed resources, and therefore can be received without any special notification to the user terminal.

[0019] In future wireless communication systems, user terminals will also need to receive synchronization signals and system information (MIB and / or SIB) during initial access processing, etc., in order to communicate on newly introduced carriers (also called NR carriers (cells)).

[0020] <SSブロック> In 5G / NR, a resource unit including at least a synchronization signal (e.g., NR-PSS and / or NR-SSS (hereinafter also referred to as NR-PSS / SSS)) and a broadcast channel (e.g., NR-PBCH) is defined as an SS block or SS / PBCH block, and it is considered that communication will be carried out using the SS / PBCH block.

[0021] An SS / PBCH block is composed of a plurality of consecutive OFDM symbols. For example, a symbol for a first synchronization signal (e.g., NR-PSS), a symbol for a second synchronization signal (e.g., NR-SSS), and a symbol for NR-PBCH are arranged consecutively. In addition, the NR-PBCH may be arranged in a plurality of symbols (e.g., two or three symbols), and an SS block is composed of, for example, one symbol for NR-PSS, one symbol for NR-SSS, and two symbols for NR-PBCH.

[0022] The arrangement order of NR-PSS, NR-SSS and NR-PBCH is under consideration, for example, as NR-PSS / NR-PBCH / NR-SSS / NR-PBCH (see FIG. 1). Of course, the arrangement order of the synchronization signal and the broadcast channel in the SS / PBCH block is not limited to this. The SS / PBCH block may be configured to include an NR-PBCH with three or more symbols.

[0023] Also, the NR-PSS / SSS and the NR-PBCH may be configured to be mapped to different frequency regions (or frequency bands). For example, the NR-PSS / SSS is mapped to a first frequency region (e.g., 12 PRBs (or 127 subcarriers)), and the NR-PBCH is mapped to a second frequency region (e.g., 24 PRBs (or 288 subcarriers)) that is wider than the first frequency region (see FIG. 1).

[0024] In this case, the NR-PSS / SSS is mapped to 127 subcarriers×1 symbol, and the NR-PBCH is mapped to 288 subcarriers×2 symbols. In addition, a reference signal (e.g., DMRS) used for demodulating the NR-PBCH may be mapped to the second frequency domain.

[0025] In this way, by setting the frequency domain of the NR-PBCH to be wider than the frequency domain of the synchronization signal (NR-PSS / NR-SSS), it is possible to secure many NR-PBCH resources to be used for notifying system information, etc.

[0026] The first frequency region to which the NR-PSS / SSS is mapped and the second frequency region to which the NR-PBCH is mapped may be arranged so as to overlap at least partially (for example, the central regions of the allocations coincide). This makes it possible to reduce the frequency region in which the UE performs reception processing of the SS block during initial access, etc. From the viewpoint of reducing the frequency region in which the UE monitors the SS block, it is preferable to map the NR-PSS / SSS and the NR-PBCH so that the range of the second frequency region includes the first frequency region.

[0027] In this way, it is being considered to set the frequency domain of the NR-PBCH wider than the frequency domain of the synchronization signal (e.g., twice as wide); however, from the viewpoint of reducing the load and / or delay during initial access by the UE, it is necessary to reduce the number of SS rasters.

[0028] The SS raster is a parameter determined based on the minimum system bandwidth and the SS / PBCH block bandwidth, and corresponds to the frequency position where the synchronization signal is searched at the time of initial access. Figure 2 shows an example of the SS raster in a specific band (band n77: 3.3-4.2 GHz, minimum system bandwidth = 10 MHz).

[0029] As shown in FIG. 2, when the frequency domain (or bandwidth) of the NR-PBCH is wide (for example, 24 PRB), the number of SS rasters is large, and as the bandwidth of the NR-PBCH becomes narrower, the number of SS rasters decreases. For example, when the bandwidth of the NR-PBCH is configured with 22 PRB, the number of rasters is about half compared to when it is configured with 24 PRB. Also, when the bandwidth of the NR-PBCH is configured with 20 PRB (or 18 PRB), the number of rasters is 1 / 3 or less compared to when it is configured with 24 PRB. Also, when the bandwidth of the NR-PBCH is configured with 12 PRB, the number of rasters is 1 / 6 or less compared to when it is configured with 24 PRB.

[0030] In this way, by reducing the bandwidth of the NR-PBCH, the number of rasters can be reduced, and the load and / or delay during initial access of the UE can be reduced. In particular, by making the bandwidth of the NR-PBCH less than twice (24 PRB) the bandwidth of the synchronization signal (12 PRB), the number of rasters can be effectively reduced.

[0031] On the other hand, if the bandwidth of the NR-PBCH is reduced in the SS / PBCH block configuration shown in Figure 1, the number of resources available for transmitting the NR-PBCH will also decrease, which may result in degradation of the performance of the NR-PBCH transmission and reception.

[0032] The inventors have noted that in the bandwidth in which the NR-PBCH is allocated, unused resources occur among resources (e.g., adjacent resources) outside the synchronization signal (e.g., NR-PSS and / or NR-SSS), and have come up with the idea of ​​transmitting the NR-PBCH using these adjacent resources.

[0033] For example, in one aspect of the present invention, a synchronization signal (PSS and / or SSS) arranged in a first frequency domain, a first broadcast channel (PBCH) arranged in a second frequency domain wider than the first frequency domain, and a second broadcast channel arranged in at least a part of a predetermined frequency domain adjacent to the first frequency domain are provided in an SS / PBCH block. In this case, the synchronization signal and the second broadcast channel may be arranged in the same time domain, and the synchronization signal and the first broadcast channel may be arranged in different time domains.

[0034] As a result, even if the bandwidth of the NR-PBCH is reduced in the configuration shown in Figure 1, resources adjacent to the NR-PSS and / or NR-SSS can be used as the NR-PBCH, making it possible to reduce the number of rasters (or the bandwidth of the NR-PBCH) while securing resources for the NR-PBCH.

[0035] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. The configurations according to the embodiments may be applied independently or in combination. In the following description, the case where the allocation region of NR-PSS and / or NR-SSS is 12 PRB will be described as an example, but the present invention is not limited to this. For example, some subcarriers of the 12 PRB may not be configured to allocate a synchronization signal. As an example, NR-PSS and / or NR-SSS may be formed with 127 subcarriers, and the remaining subcarriers (for example, 17 subcarriers) may be allocated to both ends of the synchronization signal (for example, 8 subcarriers are allocated at one end and 9 subcarriers are allocated at the other end) as guard subcarriers. In addition, in the following description, it is assumed that the center frequencies of PSS / SSS and PBCH, which are different in frequency region, are aligned, but the present invention is not limited to this.

[0036] (First aspect) The first aspect narrows the bandwidth (frequency region in which the PBCH is placed) of the PBCH (hereinafter referred to as the first PBCH) in the SS / PBCH block shown in Fig. 1. Then, the PBCH (hereinafter referred to as the second PBCH) is placed in at least a part of a predetermined frequency region adjacent to the first synchronization signal (PSS) and the second synchronization signal (SSS) (see Fig. 3).

[0037] The predetermined frequency region adjacent to the synchronization signal refers to a region in the frequency band in which the first PBCH is arranged that does not overlap with the frequency region in which the synchronization signal (PSS and / or SSS) is arranged. For example, if the bandwidth of the first PBCH is 18 PRB and the bandwidth of the PSS and / or SSS is 12 PRB, there is a portion of 3 PRBs from the end of the PSS and / or SSS that does not overlap with the first PRB. In this case, the 3 PRBs correspond to the predetermined frequency region adjacent to the synchronization signal. Also, the predetermined frequency region adjacent to the synchronization signal may be called a neighborhood region of the synchronization signal.

[0038] In Fig. 3, the PSS (12 PRB), the first PBCH (18 PRB), the SSS (12 PRB), and the first PBCH (18 PRB) are arranged in that order in different time domains (e.g., symbols). Furthermore, a configuration is shown in which the second PBCH (3 PRB) is arranged in each of the time domains in which the PSS is arranged and the time domain in which the SSS is arranged.

[0039] In Fig. 3, the second PBCH is arranged within the frequency domain (or bandwidth) of the first PBCH. In this case, when the UE receives an SS / PBCH block during initial access or the like, it is sufficient to monitor the bandwidth of the first PBCH (here, 18 PRB), so the bandwidth to be monitored can be reduced compared to the configuration shown in Fig. 1. In addition, by making the bandwidth of the first PBCH shorter than 24 PRB and separately providing the second PBCH, resources used for transmitting the PBCH can be secured.

[0040] In this way, by reducing the PBCH bandwidth (for example, to less than twice the bandwidth of the PSS / SSS) and using resources outside the PSS and SSS as part of the PBCH transmission, it is possible to reduce the bandwidth of the SS / PBCH block while securing the amount of resources used for PBCH transmission. This makes it possible to reduce the number of SS rasters, thereby reducing the load and / or delay during initial access of the UE, etc. Furthermore, by securing resources used for PBCH transmission, it is possible to suppress deterioration of communication quality.

[0041] In addition, in Fig. 3, the second PBCH is arranged in the same amount of resources (for example, the number of PRBs) in the predetermined frequency regions adjacent to the PSS and the SSS, but this is not limited to the above. The amount of resources of the second PBCH arranged in the adjacent frequency regions of the PSS and the SSS may be different. For example, the second PBCH of 2 PRBs may be arranged at both ends of the PSS, and the second PBCH of 3 PRBs may be arranged at both ends of the SSS.

[0042] (Second aspect) In the second aspect, the second PBCH is arranged in at least a part of a predetermined frequency region adjacent to one of the primary synchronization signal (PSS) and the secondary synchronization signal (SSS) (see FIG. 4).

[0043] In Fig. 4, the PSS (12 PRB), the first PBCH (20 PRB), the SSS (12 PRB), and the first PBCH (20 PRB) are arranged in that order in different time domains (e.g., symbols). Furthermore, a configuration is shown in which the second PBCH (4 PRB) is arranged in either the time domain in which the PSS is arranged or the time domain in which the SSS is arranged. Here, a case is shown in which the second PBCH is arranged in the same time domain as the time domain in which the SSS is arranged, and the second PBCH is not arranged in the time domain in which the PSS is arranged.

[0044] If a PSS uses 127 subcarriers out of 12 PRBs (144 subcarriers), when a DL signal (e.g., a second PBCH) is placed in a PRB adjacent to the PSS, the guard subcarriers set between the DL signal at both ends of the PSS will be 8 and 9 subcarriers, respectively.

[0045] If the guard interval between the PSS and a DL signal arranged in a predetermined frequency region adjacent to the PSS is short, the detection characteristics of the PSS may deteriorate. Therefore, by configuring the frequency region adjacent to the PSS so that no DL signal (e.g., a second PBCH) is arranged, the deterioration of the detection characteristics of the PSS can be suppressed.

[0046] It is also possible to provide a second PBCH in an area adjacent to the PSS, but not in an area adjacent to the SSS.

[0047] (Third aspect) The third aspect places the second PBCH in at least a portion of a predetermined frequency region adjacent to the first synchronization signal (PSS) and / or the second synchronization signal (SSS), and provides a guard region (guard PRB) consisting of a predetermined region (e.g., one PRB or more) between the synchronization signal and the second PBCH (see Figure 5).

[0048] In Fig. 5, the PSS (12 PRB), the first PBCH (20 PRB), the SSS (12 PRB), and the first PBCH (20 PRB) are arranged in that order in different time domains (e.g., symbols). Furthermore, a configuration is shown in which a second PBCH (e.g., 3 PRB) is arranged in one of the time domain in which the PSS is arranged and the time domain in which the SSS is arranged, with a guard field (e.g., 1 PRB) between them. Here, a case is shown in which the second PBCH is arranged in the same time domain as the time domain in which the SSS is arranged, with a guard field between them, and the second PBCH is not arranged in the time domain in which the PSS is arranged.

[0049] If an SSS uses 127 subcarriers out of 12 PRBs (144 subcarriers), then when a DL signal (e.g., a second PBCH) is placed in a PRB adjacent to the SSS, the guard subcarriers set between the DL signal at both ends of the SSS will be 8 and 9 subcarriers, respectively.

[0050] If the guard period between the SSS and the DL signal arranged in a predetermined frequency region adjacent to the SSS is short, the detection performance of the SSS may deteriorate. Therefore, when a second PBCH is provided in a frequency region adjacent to the SSS, a guard period of a predetermined region (e.g., 1 PRB or more) is provided, so that the deterioration of the detection performance of the SSS can be suppressed.

[0051] It is also possible to provide a second PBCH in an area adjacent to the PSS via a guard area, and not provide a second PBCH in an area adjacent to the SSS.

[0052] Alternatively, a second PBCH may be provided in the regions adjacent to the PSS and SSS with a guard region therebetween (see Fig. 6). Fig. 6 shows a configuration in which a second PBCH (e.g., 2PRB) is provided in the time domain in which the PSS is arranged and in the time domain in which the SSS is arranged with a guard region (e.g., 2PRB) therebetween.

[0053] In this way, by arranging the second PBCH in the adjacent areas of the PSS and SSS, respectively, the amount of resources used for transmitting the PBCH can be secured. Also, compared to the case where the PBCH is arranged only in the adjacent area of ​​one of the PSS and SSS, the amount of resources for the PBCH can be secured while widening the guard area (for example, 2PRB). As a result, even when the second PBCH is provided, it is possible to suppress deterioration of the detection characteristics of the PSS and SSS.

[0054] (Fourth aspect) In the fourth aspect, the second PBCH is arranged in at least a part of a predetermined frequency range adjacent to the first synchronization signal (PSS) and / or the second synchronization signal (SSS), and the second PBCH is also arranged outside the frequency range (bandwidth) of the first PBCH (see FIG. 7). In other words, the second PBCH is arranged not only within the frequency range of the first PBCH, but also outside the frequency range of the first PBCH.

[0055] In Fig. 7, the PSS (12 PRB), the first PBCH (18 PRB), the SSS (12 PRB), and the first PBCH (18 PRB) are arranged in that order in different time domains (e.g., symbols). Furthermore, a configuration is shown in which the second PBCH (e.g., 3 PRB) is arranged in the time domain in which the PSS is arranged and the time domain in which the SSS is arranged, with a guard field (e.g., 1 PRB) interposed therebetween.

[0056] Also, the second PBCH is arranged across (beyond) the ends of the first PBCH, and here, the case is shown where the second PBCH is arranged in an area one PRB outside each end of the first PBCH. Note that the extension portion of the second PBCH (the portion provided outside the end of the first PRB) is not limited to one PRB. However, from the viewpoint of suppressing an increase in the SS raster, it is preferable that the extension portion of the second PBCH is a predetermined PRB (for example, 1 or 2 PRB) or less. Also, a configuration may be adopted in which no guard area is set between the PSS and / or SSS and the second PBCH.

[0057] In this way, by allowing the second PBCH to be placed outside the bandwidth (frequency domain) of the first PBCH, it is possible to increase the resources available for transmitting the PBCH. In particular, it is possible to secure resources available for transmitting the PBCH even when a guard region is provided between the PSS and / or SSS and the second PBCH.

[0058] Furthermore, even when the second PBCH is set in an adjacent region of either the first synchronization signal (PSS) or the second synchronization signal (SSS), the second PBCH may be placed not only within the frequency domain of the first PBCH, but also outside the frequency domain of the first PBCH (see Figure 8).

[0059] In Fig. 8, the PSS (12 PRB), the first PBCH (20 PRB), the SSS (12 PRB), and the first PBCH (20 PRB) are arranged in that order in different time domains (e.g., symbols). Furthermore, the second PBCH (4 PRB) is arranged in the same time domain as the time domain in which the SSS is arranged, via a guard field (1 PRB), and the second PBCH is not arranged in the time domain in which the PSS is arranged.

[0060] Also, the second PBCH is arranged across (beyond) the edge of the first PBCH, and here, the case is shown where the second PBCH is arranged in an area one PRB outside each edge of the first PBCH. Also, a configuration may be adopted in which no guard area is set between the PSS and / or SSS and the second PBCH.

[0061] In this way, by allowing the second PBCH to be placed outside the bandwidth (frequency domain) of the first PBCH, the resources available for transmitting the PBCH can be increased. In particular, even when a guard region is provided between the SSS and the second PBCH, the resources available for transmitting the PBCH can be secured.

[0062] In addition, in FIG. 8, a second PBCH having an extended portion may be provided in an area adjacent to the PSS, and the second PBCH may not be provided in an area adjacent to the SSS.

[0063] (Wireless communication system) A configuration of a wireless communication system according to an embodiment will be described below. In this wireless communication system, communication is performed using at least one combination of the above-mentioned multiple aspects.

[0064] 9 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. In the wireless communication system 1, carrier aggregation (CA) and / or dual connectivity (DC) can be applied, in which a plurality of basic frequency blocks (component carriers) are integrated into one unit, the system bandwidth (e.g., 20 MHz) of the LTE system.

[0065] The wireless communication system 1 may be referred to as LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), NR (New Radio), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., or may be referred to as a system that realizes these.

[0066] The wireless communication system 1 includes a wireless base station 11 that forms a macrocell C1 with a relatively wide coverage, and wireless base stations 12 (12a-12c) that are arranged in the macrocell C1 and form small cells C2 that are narrower than the macrocell C1. User terminals 20 are arranged in the macrocell C1 and each small cell C2. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure.

[0067] The user terminal 20 can be connected to both the radio base station 11 and the radio base station 12. It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 simultaneously using CA or DC. The user terminal 20 may also apply CA or DC using multiple cells (CCs) (for example, five or fewer CCs, six or more CCs).

[0068] Communication between the user terminal 20 and the radio base station 11 can be performed using a carrier (also called an existing carrier, legacy carrier, etc.) with a relatively low frequency band (e.g., 2 GHz) and narrow bandwidth. On the other hand, a carrier with a relatively high frequency band (e.g., 3.5 GHz, 5 GHz, etc.) and wide bandwidth may be used between the user terminal 20 and the radio base station 12, or the same carrier as between the user terminal 20 and the radio base station 11 may be used. Note that the configuration of the frequency bands used by each radio base station is not limited to this.

[0069] Furthermore, the user terminal 20 can communicate in each cell using time division duplex (TDD) and / or frequency division duplex (FDD). Furthermore, a single numerology may be applied in each cell (carrier), or multiple different numerologies may be applied.

[0070] Numerology may be a communication parameter applied to the transmission and / or reception of a signal and / or channel, and may indicate at least one of, for example, subcarrier spacing, bandwidth, symbol length, cyclic prefix length, subframe length, TTI length, number of symbols per TTI, radio frame structure, filtering process, windowing process, etc.

[0071] The wireless base station 11 and the wireless base station 12 (or the two wireless base stations 12) may be connected by wire (for example, optical fiber conforming to CPRI (Common Public Radio Interface), X2 interface, etc.) or wirelessly.

[0072] The radio base station 11 and each radio base station 12 are each connected to a higher station device 30, and are connected to a core network 40 via the higher station device 30. The higher station device 30 includes, but is not limited to, an access gateway device, a radio network controller (RNC), a mobility management entity (MME), and the like. Each radio base station 12 may be connected to the higher station device 30 via the radio base station 11.

[0073] The radio base station 11 is a radio base station having a relatively wide coverage, and may be called a macro base station, an aggregation node, an eNodeB (eNB), a transmission / reception point, etc. The radio base station 12 is a radio base station having a local coverage, and may be called a small base station, a micro base station, a pico base station, a femto base station, a Home eNodeB (HeNB), a Remote Radio Head (RRH), a transmission / reception point, etc. Hereinafter, when there is no need to distinguish between the radio base stations 11 and 12, they are collectively referred to as the radio base station 10.

[0074] Each user terminal 20 is a terminal compatible with various communication methods such as LTE and LTE-A, and may include not only a mobile communication terminal (mobile station) but also a fixed communication terminal (fixed station).

[0075] In the wireless communication system 1, as a wireless access scheme, Orthogonal Frequency Division Multiple Access (OFDMA) is applied to the downlink, and Single Carrier Frequency Division Multiple Access (SC-FDMA) and / or OFDMA is applied to the uplink.

[0076] OFDMA is a multi-carrier transmission method that divides a frequency band into multiple narrow frequency bands (subcarriers) and maps data to each subcarrier for communication. SC-FDMA is a single-carrier transmission method that divides the system bandwidth into bands consisting of one or consecutive resource blocks for each terminal, and reduces interference between terminals by having multiple terminals use different bands. Note that the uplink and downlink wireless access methods are not limited to the combination of these, and other wireless access methods may be used.

[0077] In the wireless communication system 1, a downlink shared channel (PDSCH: Physical Downlink Shared Channel) shared by each user terminal 20, a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel, etc. are used as downlink channels. User data, upper layer control information, SIB (System Information Block), etc. are transmitted by the PDSCH. Furthermore, MIB (Master Information Block) is transmitted by the PBCH.

[0078] The downlink L1 / L2 control channel includes at least one of a downlink control channel (PDCCH (Physical Downlink Control Channel) and / or EPDCCH (Enhanced Physical Downlink Control Channel)), PCFICH (Physical Control Format Indicator Channel), and PHICH (Physical Hybrid-ARQ Indicator Channel). Downlink control information (DCI: Downlink Control Information) including scheduling information of PDSCH and / or PUSCH, etc. are transmitted by the PDCCH.

[0079] Note that scheduling information may be notified by DCI. For example, DCI for scheduling DL data reception may be called DL assignment, and DCI for scheduling UL data transmission may be called UL grant.

[0080] The number of OFDM symbols used for the PDCCH is transmitted by the PCFICH. The PHICH transmits delivery confirmation information (e.g., retransmission control information, also called HARQ-ACK, ACK / NACK, etc.) of the HARQ (Hybrid Automatic Repeat reQuest) for the PUSCH. The EPDCCH is frequency division multiplexed with the PDSCH (Downlink Shared Data Channel) and is used for transmitting DCI, etc., like the PDCCH.

[0081] In the wireless communication system 1, as uplink channels, an uplink shared channel (PUSCH: Physical Uplink Shared Channel) shared by each user terminal 20, an uplink control channel (PUCCH: Physical Uplink Control Channel), a random access channel (PRACH: Physical Random Access Channel), etc. are used. The PUSCH transmits user data, higher layer control information, etc. Furthermore, the PUCCH transmits downlink radio link quality information (CQI: Channel Quality Indicator), delivery acknowledgement information, scheduling request (SR: Scheduling Request), etc. The PRACH transmits a random access preamble for establishing a connection with a cell.

[0082] In the wireless communication system 1, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), etc. are transmitted as downlink reference signals. In addition, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. are transmitted as uplink reference signals. Note that the DMRS may be called a user equipment specific reference signal (UE-specific Reference Signal). In addition, the reference signals to be transmitted are not limited to these.

[0083] In the wireless communication system 1, a synchronization signal (for example, a Primary Synchronization Signal (PSS) / Secondary Synchronization Signal (SSS)), a broadcast channel (Physical Broadcast Channel (PBCH)), etc. are transmitted. Note that the synchronization signal and the PBCH may be transmitted in a Synchronization Signal Block (SSB).

[0084] <Radio base station> 10 is a diagram showing an example of the overall configuration of a wireless base station according to an embodiment. The wireless base station 10 includes a plurality of transmitting / receiving antennas 101, an amplifier unit 102, a transmitting / receiving unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106. Note that the wireless base station 10 may be configured to include one or more of each of the transmitting / receiving antennas 101, the amplifier unit 102, and the transmitting / receiving unit 103.

[0085] User data to be transmitted from the radio base station 10 to the user terminal 20 on the downlink is input from the higher-level station device 30 to the baseband signal processing unit 104 via the transmission path interface 106 .

[0086] In the baseband signal processing unit 104, transmission processes such as Packet Data Convergence Protocol (PDCP) layer processing, user data division and joining, Radio Link Control (RLC) layer transmission processes such as RLC retransmission control, Medium Access Control (MAC) retransmission control (e.g., HARQ transmission process), scheduling, transmission format selection, channel coding, Inverse Fast Fourier Transform (IFFT) processing, and precoding processing are performed on the user data, and the data is transferred to the transceiver unit 103. In addition, transmission processes such as channel coding and inverse fast Fourier transform are also performed on the downlink control signal, and the data is transferred to the transceiver unit 103.

[0087] The transmitting / receiving unit 103 converts the baseband signal output from the baseband signal processing unit 104 after precoding for each antenna into a radio frequency band and transmits the converted signal. The radio frequency signal frequency-converted by the transmitting / receiving unit 103 is amplified by the amplifier unit 102 and transmitted from the transmitting / receiving antenna 101. The transmitting / receiving unit 103 can be configured from a transmitter / receiver, a transmitting / receiving circuit, or a transmitting / receiving device that are explained based on a common understanding in the technical field to which the present disclosure relates. Note that the transmitting / receiving unit 103 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit.

[0088] On the other hand, for an uplink signal, a radio frequency signal received by the transmitting / receiving antenna 101 is amplified by the amplifier unit 102. The transmitting / receiving unit 103 receives the uplink signal amplified by the amplifier unit 102. The transmitting / receiving unit 103 frequency-converts the received signal to a baseband signal and outputs the signal to the baseband signal processing unit 104.

[0089] The baseband signal processing unit 104 performs Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing, error correction decoding, MAC retransmission control reception processing, and RLC layer and PDCP layer reception processing on the user data included in the input uplink signal, and transfers the data to the higher level station device 30 via a transmission path interface 106. The call processing unit 105 performs call processing (setting, releasing, etc.) of communication channels, status management of the wireless base station 10, management of wireless resources, etc.

[0090] The transmission line interface 106 transmits and receives signals to and from the higher-level station device 30 via a predetermined interface. The transmission line interface 106 may also transmit and receive signals (backhaul signaling) to and from other wireless base stations 10 via an inter-base station interface (for example, an optical fiber conforming to CPRI (Common Public Radio Interface), an X2 interface).

[0091] The transmitting / receiving unit 103 may further include an analog beam forming unit that performs analog beam forming. The analog beam forming unit may be configured with an analog beam forming circuit (e.g., a phase shifter, a phase shift circuit) or an analog beam forming device (e.g., a phase shifter) that is explained based on a common understanding in the technical field related to the present invention. The transmitting / receiving antenna 101 may be configured with, for example, an array antenna. The transmitting / receiving unit 103 may be configured to be able to apply single BF and multi-BF.

[0092] The transceiver 103 transmits an SS / PBCH block including a synchronization signal (PSS and / or SSS) and a broadcast channel (PBCH). For example, the transceiver 103 transmits an SS / PBCH block including a synchronization signal arranged in a first frequency domain, a first broadcast channel arranged in a second frequency domain wider than the first frequency domain, and a second broadcast channel arranged in at least a part of a predetermined frequency domain adjacent to the first frequency domain.

[0093] 11 is a diagram showing an example of a functional configuration of a wireless base station according to an embodiment. Note that this example mainly shows functional blocks of characteristic parts in an embodiment, and the wireless base station 10 may be assumed to also have other functional blocks necessary for wireless communication.

[0094] The baseband signal processing unit 104 includes at least a control unit (scheduler) 301, a transmission signal generating unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305. Note that these components only need to be included in the radio base station 10, and some or all of the components do not necessarily need to be included in the baseband signal processing unit 104.

[0095] The control unit (scheduler) 301 performs overall control of the radio base station 10. The control unit 301 can be configured with a controller, a control circuit, or a control device that is described based on common understanding in the technical field to which the present disclosure relates.

[0096] The control unit 301 controls, for example, signal generation in the transmission signal generation unit 302, signal allocation in the mapping unit 303, etc. The control unit 301 also controls signal reception processing in the reception signal processing unit 304, signal measurement in the measurement unit 305, etc.

[0097] The control unit 301 controls the scheduling (e.g., resource allocation) of system information, downlink data signals (e.g., signals transmitted on PDSCH), and downlink control signals (e.g., signals transmitted on PDCCH and / or EPDCCH, such as delivery acknowledgement information). In addition, the control unit 301 controls the generation of downlink control signals, downlink data signals, etc., based on the result of determining whether or not retransmission control is required for uplink data signals.

[0098] The control unit 301 controls the scheduling of a synchronization signal (for example, PSS / SSS), a broadcast channel (PBCH), a downlink reference signal (for example, CRS, CSI-RS, DMRS), and the like.

[0099] The control unit 301 controls the transmission of an SS / PBCH block including a synchronization signal arranged in a first frequency domain, a first broadcast channel arranged in a second frequency domain wider than the first frequency domain, and a second broadcast channel arranged in at least a part of a predetermined frequency domain adjacent to the first frequency domain.

[0100] The synchronization signal and the second broadcast channel may be arranged in the same time domain, and the synchronization signal and the first broadcast channel may be arranged in different time domains. The second frequency domain (e.g., the number of PRBs) may be less than twice the first frequency domain (e.g., the number of PRBs). A guard period of one PRB or more may be set between the synchronization signal and the second broadcast channel.

[0101] The synchronization signal includes a first synchronization signal (PSS) and a second synchronization signal (SSS) arranged in different time domains, and the second broadcast channel may be arranged in the same time domain as the first synchronization signal and the same time domain as the second synchronization signal, respectively. Alternatively, the second broadcast channel may be arranged in only one of the same time domain as the first synchronization signal or the same time domain as the second synchronization signal.

[0102] The second broadcast channel may be set within the range of the second frequency region, or may be set beyond the range of the second frequency region.

[0103] The transmission signal generating unit 302 generates downlink signals (downlink control signals, downlink data signals, downlink reference signals, etc.) based on instructions from the control unit 301, and outputs the generated downlink signals to the mapping unit 303. The transmission signal generating unit 302 can be configured from a signal generator, a signal generating circuit, or a signal generating device described based on common understanding in the technical field related to the present disclosure.

[0104] The transmission signal generating unit 302 generates a DL assignment for notifying allocation information of downlink data and / or a UL grant for notifying allocation information of uplink data, for example, based on an instruction from the control unit 301. Both the DL assignment and the UL grant are DCI and follow the DCI format. In addition, the downlink data signal is subjected to coding processing, modulation processing, etc. according to a coding rate, a modulation method, etc. determined based on channel state information (CSI) from each user terminal 20, etc.

[0105] The mapping unit 303 maps the downlink signal generated by the transmission signal generating unit 302 to a predetermined radio resource based on an instruction from the control unit 301, and outputs the mapped signal to the transmitting / receiving unit 103. The mapping unit 303 can be configured from a mapper, a mapping circuit, or a mapping device described based on a common understanding in the technical field related to the present disclosure.

[0106] The received signal processing unit 304 performs reception processing (e.g., demapping, demodulation, decoding, etc.) on the received signal input from the transmitting / receiving unit 103. Here, the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20. The received signal processing unit 304 can be configured with a signal processor, a signal processing circuit, or a signal processing device described based on common understanding in the technical field related to the present disclosure.

[0107] The received signal processing unit 304 outputs information decoded by the receiving process to the control unit 301. For example, when a PUCCH including an HARQ-ACK is received, the received signal processing unit 304 outputs the HARQ-ACK to the control unit 301. In addition, the received signal processing unit 304 outputs the received signal and / or the signal after the receiving process to the measurement unit 305.

[0108] The measurement unit 305 performs measurements on the received signal. The measurement unit 305 can be configured with a measurement instrument, a measurement circuit, or a measurement device described based on common understanding in the technical field to which the present disclosure relates.

[0109] For example, the measurement unit 305 may perform RRM (Radio Resource Management) measurement, CSI (Channel State Information) measurement, etc., based on the received signal. The measurement unit 305 may measure received power (e.g., RSRP (Reference Signal Received Power)), received quality (e.g., RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio), SNR (Signal to Noise Ratio)), signal strength (e.g., RSSI (Received Signal Strength Indicator)), propagation path information (e.g., CSI), etc. The measurement result may be output to the control unit 301.

[0110] <User device> 12 is a diagram showing an example of the overall configuration of a user terminal according to an embodiment. The user terminal 20 includes a plurality of transmitting / receiving antennas 201, an amplifier unit 202, a transmitting / receiving unit 203, a baseband signal processing unit 204, and an application unit 205. Note that the user terminal 20 may be configured to include one or more of each of the transmitting / receiving antennas 201, the amplifier unit 202, and the transmitting / receiving unit 203.

[0111] The radio frequency signal received by the transmitting / receiving antenna 201 is amplified by the amplifier unit 202. The transmitting / receiving unit 203 receives the downlink signal amplified by the amplifier unit 202. The transmitting / receiving unit 203 frequency-converts the received signal to a baseband signal and outputs the signal to the baseband signal processing unit 204. The transmitting / receiving unit 203 can be configured from a transmitter / receiver, a transmitting / receiving circuit, or a transmitting / receiving device that are explained based on a common understanding in the technical field to which the present disclosure relates. Note that the transmitting / receiving unit 203 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit.

[0112] The baseband signal processing unit 204 performs FFT processing, error correction decoding, retransmission control reception processing, etc. on the input baseband signal. Downlink user data is transferred to the application unit 205. The application unit 205 performs processing related to layers higher than the physical layer and the MAC layer, etc. Among the downlink data, broadcast information may also be transferred to the application unit 205.

[0113] On the other hand, uplink user data is input from the application unit 205 to the baseband signal processing unit 204. The baseband signal processing unit 204 performs transmission processing for retransmission control (for example, transmission processing for HARQ), channel coding, precoding, Discrete Fourier Transform (DFT) processing, IFFT processing, and the like, and transfers the data to the transceiver unit 203.

[0114] The transmitting / receiving unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits it. The radio frequency signal frequency-converted by the transmitting / receiving unit 203 is amplified by the amplifier unit 202 and transmitted from the transmitting / receiving antenna 201.

[0115] The transmitting / receiving unit 203 may further include an analog beam forming unit that performs analog beam forming. The analog beam forming unit may be configured with an analog beam forming circuit (e.g., a phase shifter, a phase shift circuit) or an analog beam forming device (e.g., a phase shifter) that is explained based on a common understanding in the technical field related to the present invention. The transmitting / receiving antenna 201 may be configured with, for example, an array antenna. The transmitting / receiving unit 203 is configured to be able to apply single BF and multi-BF.

[0116] The transceiver 203 receives an SS / PBCH block including a synchronization signal (PSS and / or SSS) and a broadcast channel (PBCH). For example, the transceiver 203 receives an SS / PBCH block including a synchronization signal arranged in a first frequency domain, a first broadcast channel arranged in a second frequency domain wider than the first frequency domain, and a second broadcast channel arranged in at least a part of a predetermined frequency domain adjacent to the first frequency domain.

[0117] 13 is a diagram showing an example of a functional configuration of a user terminal according to an embodiment. Note that this example mainly shows functional blocks of characteristic parts in one embodiment, and the user terminal 20 may be assumed to also have other functional blocks necessary for wireless communication.

[0118] The baseband signal processing unit 204 of the user terminal 20 includes at least a control unit 401, a transmission signal generating unit 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit 405. Note that these components only need to be included in the user terminal 20, and some or all of the components do not necessarily need to be included in the baseband signal processing unit 204.

[0119] The control unit 401 performs overall control of the user terminal 20. The control unit 401 can be configured from a controller, a control circuit, or a control device that is described based on common understanding in the technical field to which the present disclosure relates.

[0120] The control unit 401 controls, for example, signal generation in the transmission signal generation unit 402, signal allocation in the mapping unit 403, etc. The control unit 401 also controls signal reception processing in the reception signal processing unit 404, signal measurement in the measurement unit 405, etc.

[0121] The control unit 401 acquires the downlink control signal and the downlink data signal transmitted from the radio base station 10 from the received signal processing unit 404. The control unit 401 controls the generation of the uplink control signal and / or the uplink data signal based on the result of judging whether or not retransmission control is required for the downlink control signal and / or the downlink data signal.

[0122] The control unit 401 controls reception of an SS / PBCH block including a synchronization signal arranged in a first frequency domain, a first broadcast channel arranged in a second frequency domain wider than the first frequency domain, and a second broadcast channel arranged in at least a part of a predetermined frequency domain adjacent to the first frequency domain.

[0123] The synchronization signal and the second broadcast channel may be arranged in the same time domain, and the synchronization signal and the first broadcast channel may be arranged in different time domains. The second frequency domain (e.g., the number of PRBs) may be less than twice the first frequency domain (e.g., the number of PRBs). A guard period of one PRB or more may be set between the synchronization signal and the second broadcast channel.

[0124] The synchronization signal includes a first synchronization signal (PSS) and a second synchronization signal (SSS) arranged in different time domains, and the second broadcast channel may be arranged in the same time domain as the first synchronization signal and the same time domain as the second synchronization signal, respectively. Alternatively, the second broadcast channel may be arranged in only one of the same time domain as the first synchronization signal or the same time domain as the second synchronization signal.

[0125] The second broadcast channel may be set within the range of the second frequency region, or may be set beyond the range of the second frequency region.

[0126] The transmission signal generating unit 402 generates uplink signals (uplink control signals, uplink data signals, uplink reference signals, etc.) based on instructions from the control unit 401, and outputs the signals to the mapping unit 403. The transmission signal generating unit 402 can be configured from a signal generator, a signal generating circuit, or a signal generating device that is described based on common understanding in the technical field related to the present disclosure.

[0127] The transmission signal generating unit 402 generates uplink control signals related to acknowledgement information, channel state information (CSI), etc., based on, for example, an instruction from the control unit 401. The transmission signal generating unit 402 also generates uplink data signals based on an instruction from the control unit 401. For example, when a downlink control signal notified from the radio base station 10 includes an UL grant, the transmission signal generating unit 402 is instructed by the control unit 401 to generate an uplink data signal.

[0128] The mapping unit 403 maps the uplink signal generated by the transmission signal generating unit 402 to a radio resource based on an instruction from the control unit 401, and outputs the result to the transceiver unit 203. The mapping unit 403 can be configured from a mapper, a mapping circuit, or a mapping device that is described based on common understanding in the technical field related to the present disclosure.

[0129] The received signal processing unit 404 performs reception processing (e.g., demapping, demodulation, decoding, etc.) on the received signal input from the transmitting / receiving unit 203. Here, the received signal is, for example, a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) transmitted from the radio base station 10. The received signal processing unit 404 can be configured from a signal processor, a signal processing circuit, or a signal processing device described based on common understanding in the technical field related to the present disclosure. Furthermore, the received signal processing unit 404 can configure a receiving unit related to the present disclosure.

[0130] The received signal processing unit 404 outputs information decoded by the receiving process to the control unit 401. The received signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401. In addition, the received signal processing unit 404 outputs the received signal and / or the signal after the receiving process to the measurement unit 405.

[0131] The measurement unit 405 performs measurements on the received signal. The measurement unit 405 can be configured with a measurement instrument, a measurement circuit, or a measurement device described based on common understanding in the technical field to which the present disclosure relates.

[0132] For example, the measurement unit 405 may perform RRM measurement, CSI measurement, etc. based on the received signal. The measurement unit 405 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement result may be output to the control unit 401.

[0133] <Hardware configuration> The block diagrams used in the description of the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of hardware and / or software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically and / or logically coupled, or may be realized by using two or more devices that are physically and / or logically separated and directly and / or indirectly (for example, by using wires and / or wirelessly) connected to each other.

[0134] For example, a radio base station, a user terminal, etc. in one embodiment may function as a computer that performs processing of each aspect of the embodiment. Fig. 14 is a diagram showing an example of a hardware configuration of a radio base station and a user terminal according to one embodiment. The above-mentioned radio base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0135] In the following description, the term "apparatus" may be interpreted as a circuit, a device, a unit, etc. The hardware configuration of the radio base station 10 and the user terminal 20 may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0136] For example, although only one processor 1001 is shown, there may be multiple processors. Additionally, the processes may be performed by one processor, or the processes may be performed by one or more processors simultaneously, sequentially, or in other manners. Additionally, the processor 1001 may be implemented by one or more chips.

[0137] Each function in the radio base station 10 and the user terminal 20 is realized, for example, by loading a specific software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications via a communication device 1004, and controls the reading and / or writing of data in the memory 1002 and the storage 1003.

[0138] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned baseband signal processing unit 104 (204), call processing unit 105, etc. may be realized by the processor 1001.

[0139] Furthermore, the processor 1001 reads out programs (program codes), software modules, data, etc. from the storage 1003 and / or the communication device 1004 into the memory 1002, and executes various processes according to these. As the programs, programs that cause a computer to execute at least a part of the operations described in the above-mentioned embodiments are used. For example, the control unit 401 of the user terminal 20 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and other functional blocks may be realized in a similar manner.

[0140] The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), and other suitable storage media. The memory 1002 may also be called a register, a cache, a main memory (primary storage device), etc. The memory 1002 can store a program (program code), software modules, etc. that are executable to implement a wireless communication method according to one embodiment.

[0141] Storage 1003 is a computer-readable recording medium, and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (CD-ROM (Compact Disc ROM)), a digital versatile disk, a Blu-ray (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, and other suitable storage media. Storage 1003 may also be referred to as an auxiliary storage device.

[0142] The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize, for example, Frequency Division Duplex (FDD) and / or Time Division Duplex (TDD). For example, the above-mentioned transmission / reception antenna 101 (201), amplifier unit 102 (202), transmission / reception unit 103 (203), transmission path interface 106, etc. may be realized by the communication device 1004.

[0143] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, an LED (Light Emitting Diode) lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated into one (e.g., a touch panel).

[0144] In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0145] Furthermore, the radio base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0146] (Modification) In addition, the terms described in this specification and / or terms necessary for understanding this specification may be replaced with terms having the same or similar meanings. For example, a channel and / or a symbol may be a signal (signaling). Also, a signal may be a message. A reference signal may be abbreviated as RS (Reference Signal) and may be called a pilot, pilot signal, etc. depending on the applied standard. Also, a component carrier (CC) may be called a cell, a frequency carrier, a carrier frequency, etc.

[0147] Moreover, a radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0148] Furthermore, a slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may also be a time unit based on numerology. A slot may also include multiple minislots. Each minislot may be composed of one or more symbols in the time domain. A minislot may also be called a subslot.

[0149] A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. A radio frame, a subframe, a slot, a minislot, and a symbol may each be called by a different name. For example, one subframe may be called a transmission time interval (TTI), a plurality of consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, a subframe and / or a TTI may be a subframe (1 ms) in an existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that a unit representing a TTI may be called a slot, a minislot, or the like, instead of a subframe.

[0150] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a wireless base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0151] The TTI may be a transmission time unit of a channel-encoded data packet (transport block), a code block, and / or a code word, or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) in which the transport block, the code block, and / or the code word are actually mapped may be shorter than the TTI.

[0152] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0153] A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, etc.

[0154] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0155] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI and one subframe may each be composed of one or more resource blocks. Note that one or more RBs may be called a physical resource block (PRB), a subcarrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0156] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0157] The above-mentioned structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0158] Furthermore, the information, parameters, etc. described in this specification may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0159] The names used for parameters and the like in this specification are not limiting in any respect. For example, the various channels (e.g., PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.) and information elements may be identified by any suitable names, and the various names assigned to these various channels and information elements are not limiting in any respect.

[0160] The information, signals, etc. described herein may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0161] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via multiple network nodes.

[0162] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0163] Notification of information is not limited to the aspects / embodiments described in this specification, and may be performed using other methods. For example, notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination of these.

[0164] The physical layer signaling may be called L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC connection setup message, an RRC connection reconfiguration message, etc. The MAC signaling may be notified by using a MAC control element (MAC CE (Control Element)), for example.

[0165] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0166] The determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented as true or false, or by comparing numerical values ​​(e.g., with a predetermined value).

[0167] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0168] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave, etc.), these wired and / or wireless technologies are included within the definition of transmission media.

[0169] As used herein, the terms "system" and "network" are used interchangeably.

[0170] In this specification, the terms "base station (BS)", "radio base station", "eNB", "gNB", "cell", "sector", "cell group", "carrier" and "component carrier" may be used interchangeably. A base station may also be called a fixed station, NodeB, eNodeB (eNB), access point, transmission point, reception point, femtocell, small cell, etc.

[0171] A base station can accommodate one or more (e.g., three) cells (also called sectors). When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0172] In this specification, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)" and "terminal" may be used interchangeably.

[0173] A mobile station may also be referred to by those skilled in the art as 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, handset, user agent, mobile client, client, or some other suitable terminology.

[0174] Furthermore, the radio base station in this specification may be read as a user terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a radio base station and a user terminal is replaced with communication between a plurality of user terminals (D2D: Device-to-Device). In this case, the user terminal 20 may be configured to have the functions of the radio base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as "side". For example, an uplink channel may be read as a side channel.

[0175] Similarly, the user terminal in this specification may be interpreted as a wireless base station. In this case, the wireless base station 10 may be configured to have the functions of the user terminal 20 described above.

[0176] In this specification, an operation that is described as being performed by a base station may be performed by its upper node in some cases. In a network including one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, an MME (Mobility Management Entity) and an S-GW (Serving-Gateway)), or a combination thereof.

[0177] Each aspect / embodiment described herein may be used alone, in combination, or switched depending on the implementation. In addition, the order of the process steps, sequences, flow charts, etc. of each aspect / embodiment described herein may be changed unless inconsistent. For example, the methods described herein present elements of various steps in an example order, and are not limited to the particular order presented.

[0178] Each aspect / embodiment described in this specification may be applied to a system using LTE (Long Term Evolution), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access), FX (Future generation radio access), GSM (registered trademark) (Global System for Mobile communications), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), or other suitable wireless communication method, and / or a next-generation system extended based on these.

[0179] As used herein, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0180] As used herein, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used herein as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.

[0181] As used herein, the term "determining" may encompass a wide variety of actions. For example, "determining" may be considered to be "determining" calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, database, or another data structure), ascertaining, etc. Also, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc. Also, "determining" may be considered to be "determining" resolving, selecting, choosing, establishing, comparing, etc. That is, a "judgment" may be considered as "deciding" to take some kind of action.

[0182] As used herein, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "accessed."

[0183] As used herein, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables and / or printed electrical connections, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range and / or optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0184] In this specification, the term "A and B are different" may mean "A and B are different from each other." Terms such as "separate," "coupled," etc. may be interpreted similarly.

[0185] When the terms "including," "comprising," and variations thereof are used in this specification or the claims, these terms are intended to be inclusive, as is the term "comprising." Further, when used in the specification or the claims, the term "or" is not intended to be an exclusive or.

[0186] Although the present invention has been described in detail above, it is clear to those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented in modified and altered forms without departing from the spirit and scope of the present invention defined based on the description of the claims. Therefore, the description of the present specification is intended to be illustrative and does not have any limiting meaning on the present invention.

[0187] (Additional Note) Supplementary notes to this disclosure are provided below.

[0188] This disclosure relates to the design of the NR-PBCH and SS block (SS / PBCH block).

[0189] In RAN1, SS bandwidth = 12PRB, PBCH bandwidth = 24PRB, and SS / PBCH block design are considered to be arranged in time division multiplexing (TDM) of PSS-PBCH-SSS-PBCH. On the other hand, in order to reduce the load and delay during UE initial access, it is desired to reduce the number of SS rasters determined based on the minimum system bandwidth and SS / PBCH block bandwidth.

[0190] Here, the SS raster refers to the frequency position where the synchronization signal is searched for during initial access. For example, the SS raster for band n77 (3.3-4.2 GHz, minimum system bandwidth=10 MHz) is shown in FIG.

[0191] In order to reduce the number of SS rasters, a reduction in the PBCH bandwidth from 24 PRB to 12 or 18 PRB is being considered. However, in this case, there is a risk that the performance will deteriorate due to the reduction in resources available for PBCH transmission.

[0192] Therefore, in this application, resources outside the synchronization signals (PSS and / or SSS) are used as part of the PBCH transmission, which makes it possible to reduce the SS / PBCH block bandwidth and the number of SS rasters while maintaining the amount of resources available for PBCH transmission as much as possible.

[0193] An example of the configuration of the present disclosure will be described below. Note that the present disclosure is not limited to the following configuration. [Configuration 1] a control unit that controls reception of a first synchronization signal (PSS), a second synchronization signal (SSS), and a broadcast channel (PBCH) in an SS / PBCH block that is composed of four consecutive symbols and a predetermined number of subcarriers; a receiver for receiving the PSS, the SSS and the PBCH forming the SS / PBCH block; The PSS and the SSS are arranged in a first frequency domain; The PBCH is arranged in at least a part of a second frequency region that is wider than the first frequency region; In the SS / PBCH block, the PBCH is arranged in at least a part of a first predetermined area adjacent to the SSS in the frequency direction, and is not arranged in a second predetermined area adjacent to the PSS in the frequency direction; The PBCH includes a first portion of the PBCH arranged in the second frequency region of a symbol different from the PSS and the SSS, and a second portion of the PBCH arranged in at least a part of the first predetermined region of the same symbol as the SSS, The terminal, wherein the PBCH is not arranged in the same symbol as the PSS. [Configuration 2] 2. The terminal of claim 1, wherein the second portion of the PBCH is located a predetermined number of subcarriers away from the SSS. [Configuration 3] The terminal of claim 2, characterized in that the second portion of the PBCH is placed in a third predetermined area that is a first number of subcarriers away from the SSS and in a fourth predetermined area that is a second number of subcarriers away. [Configuration 4] 4. The terminal according to claim 1, wherein the first frequency region is included in the range of the second frequency region, and the first predetermined region is a region in which the first frequency region and the second frequency region do not overlap. [Configuration 5] 5. The terminal according to claim 1, wherein the second frequency range is less than twice the first frequency range. [Configuration 6] 6. The terminal according to claim 1, wherein in the SS / PBCH block, no DL signal is allocated to a predetermined resource adjacent to a resource of the PSS in a frequency direction. [Configuration 7] 7. The terminal according to claim 6, wherein the first frequency region is included in the range of the second frequency region, and the frequency region of the predetermined resource is all of the second frequency region except for the first frequency region. [Configuration 8] The terminal according to claim 2, wherein the predetermined number of subcarriers is greater than one subcarrier. [Configuration 9] a control unit that controls transmission of a first synchronization signal (PSS), a second synchronization signal (SSS), and a broadcast channel (PBCH) in an SS / PBCH block that is composed of four consecutive symbols and a predetermined number of subcarriers; a transmitter for transmitting the PSS, the SSS and the PBCH forming the SS / PBCH block; The PSS and the SSS are arranged in a first frequency domain; The PBCH is arranged in at least a part of a second frequency region that is wider than the first frequency region; In the SS / PBCH block, the PBCH is arranged in at least a part of a first predetermined area adjacent to the SSS in the frequency direction, and is not arranged in a second predetermined area adjacent to the PSS in the frequency direction; The PBCH includes a first portion of the PBCH arranged in the second frequency region of a symbol different from the PSS and the SSS, and a second portion of the PBCH arranged in at least a part of the first predetermined region of the same symbol as the SSS, The base station, wherein the PBCH is not arranged in the same symbol as the PSS. [Configuration 10] A step of controlling reception of a first synchronization signal (PSS), a second synchronization signal (SSS), and a broadcast channel (PBCH) in an SS / PBCH block consisting of four consecutive symbols and a predetermined number of subcarriers; receiving the PSS, the SSS and the PBCH forming the SS / PBCH block; The PSS and the SSS are arranged in a first frequency domain; The PBCH is arranged in at least a part of a second frequency region that is wider than the first frequency region; In the SS / PBCH block, the PBCH is arranged in at least a part of a first predetermined area adjacent to the SSS in the frequency direction, and is not arranged in a second predetermined area adjacent to the PSS in the frequency direction; The PBCH includes a first portion of the PBCH arranged in the second frequency region of a symbol different from the PSS and the SSS, and a second portion of the PBCH arranged in at least a part of the first predetermined region of the same symbol as the SSS, A wireless communication method for a terminal, characterized in that the PBCH is not arranged in the same symbol as the PSS. [Configuration 11] A system having a terminal and a base station, The terminal includes: a control unit that controls reception of a first synchronization signal (PSS), a second synchronization signal (SSS), and a broadcast channel (PBCH) in an SS / PBCH block that is composed of four consecutive symbols and a predetermined number of subcarriers; a receiver for receiving the PSS, the SSS and the PBCH forming the SS / PBCH block; The PSS and the SSS are arranged in a first frequency domain; The PBCH is arranged in at least a part of a second frequency region that is wider than the first frequency region; In the SS / PBCH block, the PBCH is arranged in at least a part of a first predetermined area adjacent to the SSS in the frequency direction, and is not arranged in a second predetermined area adjacent to the PSS in the frequency direction; The PBCH includes a first portion of the PBCH arranged in the second frequency region of a symbol different from the PSS and the SSS, and a second portion of the PBCH arranged in at least a part of the first predetermined region of the same symbol as the SSS, The PBCH is not arranged in the same symbol as the PSS, The base station, a control unit that controls transmission of the PSS, the SSS, and the PBCH in the SS / PBCH block; A transmitter for transmitting the PSS, SSS and PBCH that form the SS / PBCH block.

[0194] This application is based on Japanese Patent Application No. 2017-208619, filed on October 11, 2017, the contents of which are incorporated herein in their entirety.

Claims

1. A control unit that controls reception of a first synchronization signal (PSS), a second synchronization signal (SSS), and a broadcast channel (PBCH) in an SS / PBCH block that is composed of four consecutive symbols and a predetermined number of subcarriers; A receiving unit for receiving the PSS, the SSS and the PBCH forming the SS / PBCH block, The PSS and the SSS are arranged in a first frequency domain; The PBCH is arranged in at least a part of a second frequency region wider than the first frequency region; In the SS / PBCH block, the PBCH is arranged in at least a part of a first predetermined area adjacent to the SSS in a frequency direction, and is not arranged in a second predetermined area adjacent to the PSS in a frequency direction; The PBCH includes a first portion of the PBCH arranged in the second frequency region of a symbol different from the PSS and the SSS, and a second portion of the PBCH arranged in at least a part of the first predetermined region of the same symbol as the SSS, The terminal, wherein the PBCH is not arranged in the same symbol as the PSS.

2. The terminal of claim 1 , wherein the second portion of the PBCH is located a predetermined number of subcarriers away from the SSS.

3. 3. The terminal according to claim 2, wherein the second portion of the PBCH is arranged in a third predetermined area that is a first number of subcarriers away from the SSS and in a fourth predetermined area that is a second number of subcarriers away from the SSS.

4. 4. The terminal according to claim 1, wherein the first frequency region is included in the range of the second frequency region, and the first predetermined region is a region in which the first frequency region and the second frequency region do not overlap.

5. 5. The terminal according to claim 1, wherein the second frequency range is less than twice the first frequency range.

6. The terminal according to claim 1 , wherein in the SS / PBCH block, no DL signal is allocated to a predetermined resource adjacent to the PSS resource in the frequency direction.

7. The terminal according to claim 6, characterized in that the first frequency region is included in a range of the second frequency region, and the frequency region of the predetermined resource is all of the second frequency region except for the first frequency region.

8. 3. The terminal of claim 2, wherein said predetermined number of subcarriers is greater than one subcarrier.

9. A control unit that controls transmission of a first synchronization signal (PSS), a second synchronization signal (SSS), and a broadcast channel (PBCH) in an SS / PBCH block that is composed of four consecutive symbols and a predetermined number of subcarriers; A transmitter for transmitting the PSS, the SSS and the PBCH forming the SS / PBCH block, The PSS and the SSS are arranged in a first frequency domain; The PBCH is arranged in at least a part of a second frequency region wider than the first frequency region; In the SS / PBCH block, the PBCH is arranged in at least a part of a first predetermined area adjacent to the SSS in a frequency direction, and is not arranged in a second predetermined area adjacent to the PSS in a frequency direction; The PBCH includes a first portion of the PBCH arranged in the second frequency region of a symbol different from the PSS and the SSS, and a second portion of the PBCH arranged in at least a part of the first predetermined region of the same symbol as the SSS, The base station, wherein the PBCH is not arranged in the same symbol as the PSS.

10. A step of controlling reception of a first synchronization signal (PSS), a second synchronization signal (SSS), and a broadcast channel (PBCH) in an SS / PBCH block consisting of four consecutive symbols and a predetermined number of subcarriers; receiving the PSS, the SSS and the PBCH forming the SS / PBCH block; The PSS and the SSS are arranged in a first frequency domain; The PBCH is arranged in at least a part of a second frequency region wider than the first frequency region; In the SS / PBCH block, the PBCH is arranged in at least a part of a first predetermined area adjacent to the SSS in a frequency direction, and is not arranged in a second predetermined area adjacent to the PSS in a frequency direction; The PBCH includes a first portion of the PBCH arranged in the second frequency region of a symbol different from the PSS and the SSS, and a second portion of the PBCH arranged in at least a part of the first predetermined region of the same symbol as the SSS, A wireless communication method for a terminal, characterized in that the PBCH is not arranged in the same symbol as the PSS.

11. A system having a terminal and a base station, The terminal includes: A control unit that controls reception of a first synchronization signal (PSS), a second synchronization signal (SSS), and a broadcast channel (PBCH) in an SS / PBCH block that is composed of four consecutive symbols and a predetermined number of subcarriers; A receiving unit for receiving the PSS, the SSS and the PBCH forming the SS / PBCH block, The PSS and the SSS are arranged in a first frequency domain; The PBCH is arranged in at least a part of a second frequency region wider than the first frequency region; In the SS / PBCH block, the PBCH is arranged in at least a part of a first predetermined area adjacent to the SSS in a frequency direction, and is not arranged in a second predetermined area adjacent to the PSS in a frequency direction; The PBCH includes a first portion of the PBCH arranged in the second frequency region of a symbol different from the PSS and the SSS, and a second portion of the PBCH arranged in at least a part of the first predetermined region of the same symbol as the SSS, The PBCH is not arranged in the same symbol as the PSS, The base station, A control unit that controls transmission of the PSS, the SSS, and the PBCH in the SS / PBCH block; a transmitter for transmitting the PSS, SSS and PBCH forming the SS / PBCH block.

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