WO2021029076A1

WO2021029076A1 - Terminal and communication method

Info

Publication number: WO2021029076A1
Application number: PCT/JP2019/032077
Authority: WO
Inventors: 翔平吉岡; 大樹武田; 聡永田
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2021-02-18

Abstract

Provided is a terminal comprising a transmission unit that transmits, to another terminal, a synchronization signal block including a plurality of first synchronization signals and a plurality of second synchronization signals, wherein the plurality of first synchronization signals are arranged at intervals.

Description

Terminal and communication method

The present invention relates to a terminal (user device) in a wireless communication system.

In LTE (Long Term Evolution) and LTE successor systems (for example, LTE-A (LTE Advanced), NR (New Radio) (also called 5G)), communication devices such as UEs communicate directly with each other without going through a base station. (Sidelink (SL)) (D2D (Device to Device), also called direct communication between terminals) technology is being studied (Non-Patent Document 1).

In the side link (NR-SL) of the NR, it is considered that the terminal transmits a side link synchronization signal block (Sidelink Synchronization Signal Block) (SL-SSB).

However, the details of the SL-SSB structure (structure) are not specified.

The present invention has been made in view of the above points, and an object of the present invention is to provide a technique for defining the details of the configuration of SL-SSB in a wireless communication system that supports direct communication between terminals. The present invention is not limited to terminal-to-terminal communication in V2X, and may be applied to any terminal.

According to the disclosed technique, the present invention has a transmitter that transmits a synchronization signal block including a plurality of first synchronization signals and a plurality of second synchronization signals to another terminal, and the plurality of first synchronization signals. Are provided with terminals that are spaced apart.

According to the disclosed technology, a technology for defining the details of the SL-SSB configuration is provided in a wireless communication system that supports direct communication between terminals.

It is a figure which shows the structural example of the wireless communication system in embodiment of this invention. It is a figure for demonstrating LTE-SL. It is a figure for demonstrating the structure of SL-SSB of LTE-SL. It is a figure for demonstrating NR-Uu. It is a figure for demonstrating SSB of NR-Uu. It is a figure which shows an example of the structure of SL-SSB which concerns on embodiment. It is a figure which shows an example of the structure of SL-SSB which concerns on embodiment. It is a figure which shows an example of the structure of SL-SSB which concerns on embodiment. It is a figure which shows an example of the structure of SL-SSB which concerns on embodiment. It is a figure which shows an example of the structure of SL-SSB which concerns on embodiment. It is a figure which shows an example of the structure of SL-SSB which concerns on embodiment. It is a figure which shows an example of the structure of SL-SSB which concerns on embodiment. It is a figure which shows an example of the functional structure of the base station apparatus 10 which concerns on embodiment. It is a figure which shows an example of the functional structure of the terminal 20 which concerns on embodiment. It is a figure which shows an example of the hardware composition of the base station apparatus 10 and the terminal 20 which concerns on embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the embodiments described below are merely examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.

FIG. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention. The wireless communication system according to the embodiment of the present invention includes the base station device 10 and the terminal 20 as shown in FIG. Although one base station apparatus 10 and two terminals 20 are shown in FIG. 1, this is an example, and there may be two or more of each.

The base station device 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of the radio signal are defined in the time domain and the frequency domain, the time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks.

The base station device 10 transmits a synchronization signal, system information, and the like to the terminal 20. The synchronization signals are, for example, NR-PSS (NR Primary Synchronization Signal) and NR-SSS (NR Secondary Synchronization Signal). System information is also referred to as broadcast information.

Within the coverage of the base station apparatus 10, the terminal 20 receives a synchronization signal from the base station apparatus 10, and transmits SL-SSB to another terminal 20 based on the received synchronization signal. The terminal 20 may receive the synchronization signal not only from the base station device 10 such as gNB or eNB but also from GNSS (Global Navigation Satellite System).

Outside the coverage of the base station apparatus 10, terminal 20 receives a sync signal from GNSS or another terminal 20 and transmits SL-SSB to yet another terminal 20 based on the received sync signal. May be good. If the terminal 20 cannot receive the synchronization signal from any of the base station apparatus 10, GNSS, and another terminal 20, the terminal 20 autonomously uses SL-SSB to transmit the synchronization signal. It may be transmitted to another terminal 20.

SL-SSB (side link synchronization signal block) includes S-PSS (Siderink Primary Synchronization Signal), S-SSS (Siderink Secondary Synchronization Signal), PSBCH (Physical Synchronization Signal), PSBCH (Physical Synchronization Signal), and PSBCH (Physical Synchronization Signal). The names such as SL-SSB, S-PSS, and S-SSS are examples, and may be names other than SL-SSB, S-PSS, S-SSS, and the like.

(SSB of LTE-SL and SSB of NR-Uu)
Before explaining the SSB of NR-SL according to the present invention, the SSB of LTE-SL and the SSB of NR-Uu will be described.

FIG. 2 is a diagram for explaining LTE-SL. On the left side of FIG. 2, when the highest priority is set to GNSS, the terminal 20 receives a synchronization signal from GNSS, transmits it to another terminal 20 based on the received synchronization signal, and another. It is shown that the terminal 20 transmits a synchronization signal to another terminal 20 one after another like a relay. On the right side of FIG. 2, when the highest priority is set to eNB, the terminal 20 receives a synchronization signal from the eNB, transmits it to another terminal 20 based on the received synchronization signal, and another. It is shown that the terminal 20 transmits a synchronization signal to another terminal 20 one after another like a relay.

FIG. 3 is a diagram for explaining the configuration (structure) of SL-SSB of LTE-SL. In the LTE-SL SL-SSB, PSSS (Primary Sidelink Signalization Signal), SSSS (Seconday Sidelink Synchronization Signal), DMRS (Demodulation Reference Signal), DMRS (Demodulation Reference Signal), DMRS (Demodulation Reference Signal), DMRS (Demodulation Reference Signal), DMRS (Demodulation Reference Signal), DMRS (Demodulation Reference Signal), DMRS (Demodulation Reference Signal), DMRS (Demodulation Reference Signal) In addition, the configuration of SL-SSB for LTE D2D is described on the lower side of FIG. 3, and the configuration of SL-SSB for LTE V2X is described above it. Also in the configuration of, two PSSSs and two SSSSs are arranged in adjacent symbols.

4 and 5 are diagrams for explaining the SSB of NR-Uu. As shown in FIGS. 4 and 5, the SSB of NR-Uu is composed of 4 symbols. NR-PSS is arranged in the first symbol, and NR-PBCH (Physical Broadcast Channel) is arranged in the second to fourth symbols. Further, NR-SSS is arranged at the third symbol, and the circumference of NR-SSS is surrounded by NR-PBCH. As shown in FIG. 4, a plurality of SSBs having such a configuration (two in the example of FIG. 4) are arranged in one slot, and a plurality of types of SSBs are arranged in one cycle. .. With such a configuration, SSBs corresponding to a plurality of beams can be transmitted in one cycle. In this way, the SSB configuration of NR-Uu considers the influence of the large frequency offset at high frequencies and / or in order to correspond to a plurality of different subcarrier intervals (SCS: Sub-Carrier Spacing). , LTE-Uu SSB configuration has been modified.

(NR-SL SSB)
It is conceivable that the configuration of the SSB of the NR-SL is a configuration that takes into consideration the configuration of the SSB of the LTE-SL and the configuration of the SSB of the NR-Uu described above. The configuration may be read as a pattern. Further, SL-SSB may be read as S-SSB.

6A, 6B, 6C, 6D, 6E, 6F, and 6G are diagrams showing an example of the configuration of SL-SSB in one slot according to the embodiment.

(Structure A)
As the configuration A of SL-SSB of NR-SL according to the embodiment of the present invention, two S-PSS contained in SL-SSB are arranged at intervals (gap) (that is, adjacent consecutive symbols). (Arrange so that it is not arranged) is conceivable.

As shown in FIG. 6A, the interval between S and PSS may be one symbol.

As shown in FIG. 6B, the interval between S and PSS may be a Z symbol. Here, the value of Z can be defined separately. FIG. 6B shows an example when Z = 5 is defined. By arranging the two S-PSS at intervals (gap) in this way, the frequency offset can be completely compensated.

(Structure B)
As the configuration B of the SL-SSB of the NR-SL according to the embodiment of the present invention, it is conceivable that two S-SSSs included in the SL-SSB are arranged one symbol apart.

As shown in FIG. 6C, the interval between the two S-SSSs may be one symbol.

(Structure C)
Configuration A and configuration B may be combined as configuration C of SL-SSB of NR-SL according to the embodiment of the present invention.

As shown in FIG. 6D, S-PSS and S-SSS may be arranged alternately. By arranging in this way, S-PSS and S-SSS are transmitted alternately.

As shown in FIG. 6E, PSBCH may be arranged after the pair of S-PSS and S-SSS arranged alternately. The number of PSBCHs arranged after the pair of S-PSSs and S-SSSs arranged alternately may be 1 or more and 10 or less.

By arranging the PSBCH after the alternately arranged S-PSS and S-SSS pairs in this way, the physical resource block between the alternately arranged S-PSS and S-SSS pairs and the PSBCH. The number of transition periods (transient period) required when the sizes of (PRB) are different can be reduced. Also, as in configuration A, the frequency offset can be completely compensated.

As shown in FIG. 6F, PSBCH may be arranged before and after the pair of S-PSS and S-SSS arranged alternately. In this way, by arranging the PSBCH before the pair of S-PSS and S-SSS, S-PSS and S-SSS can be used for reception level adjustment (AGC: Automatic Gain Control). It disappears, and S-PSS and S-SSS can be received stably.

As shown in FIG. 6G, symbols for AGC and gap (GAP) may be placed in SL-SSB.

Note that the arrangement shown in FIGS. 6A, 6B, 6C, 6D, 6E, 6F, and 6G is an example, and is not limited to this arrangement.

(Supplement)
In the SL-SSB configuration of NR-SL in the embodiment of the present invention, any frequency domain resource can be applied to the frequency domain resource. For example, by using the resource in the SSB frequency domain of NR-Uu and the resource in the frequency domain of SL-SSB of NR-SL as resources in different frequency domains, the SL of SSB of NR-Uu and the SL of NR-SL are used. -It may be possible to avoid collision with the SSB.

Regarding the two S-PSS in the SL-SSB, the sequence of the first S-PSS (sequence) and the sequence of the second S-PSS may be the same sequence.

Regarding the two S-SSSs in the SL-SSB, the sequence of the first S-SSS and the sequence of the second S-SSS may be the same sequence.

For two S-PSS or S-SSS in SL-SSB, the sequence of the first S-PSS or S-SSS and the sequence of the second S-PSS or S-SSS are different sequences. May be. In this case, the sequence of the second symbol may be generated by scrambling the sequence of the first symbol, or the PSS of NR-Uu or the SSS of NR-Uu may be extended and generated. You may.

The design of PSBCH in SL-SSB (eg DMRS sequence) may be the same as the design of PBCH of NR-Uu.

Further, different sequences may be applied in consideration of self-timing (self timing).

(Device configuration)
Next, a functional configuration example of the base station apparatus 10 and the terminal 20 that execute the processes and operations described so far will be described. The base station apparatus 10 and the terminal 20 include a function of carrying out the above-described embodiment. However, the base station apparatus 10 and the terminal 20 may each have only a part of the functions in the embodiment.

<Base station device 10>
FIG. 7 is a diagram showing an example of the functional configuration of the base station device 10. As shown in FIG. 7, the base station apparatus 10 includes a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in FIG. 7 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.

The transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. Further, the transmission unit 110 transmits information related to control between terminals such as SL scheduling to the terminal 20. The receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring information of, for example, a higher layer from the received signals.

The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in the storage device, and reads the setting information from the storage device as needed. The content of the setting information is, for example, information related to the setting of V2X.

As described in the embodiment, the control unit 140 performs processing related to the setting for the terminal 20 to perform V2X. Further, the function unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the function unit related to signal reception in the control unit 140 may be included in the reception unit 120.

<Terminal 20>
FIG. 8 is a diagram showing an example of the functional configuration of the terminal 20. As shown in FIG. 8, the terminal 20 has a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in FIG. 8 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.

The transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal. The receiving unit 220 wirelessly receives various signals and acquires a signal of a higher layer from the received signal of the physical layer. Further, the receiving unit 220 has a function of receiving control information such as SL scheduling transmitted from the base station apparatus 10.

The setting unit 230 stores various setting information received from the base station device 10 or the terminal 20 by the receiving unit 220 in the storage device, and reads it out from the storage device as needed. The setting unit 230 also stores preset setting information. The content of the setting information is, for example, information related to V2X and HARQ processing.

The control unit 240 controls the request and report of SL-CSI as described in the embodiment. The function unit related to signal transmission in the control unit 240 may be included in the transmission unit 210, and the function unit related to signal reception in the control unit 240 may be included in the reception unit 220.

(Hardware configuration)
The functional configuration diagrams (FIGS. 7 and 8) used in the description of the embodiment of the present invention described above show blocks of functional units. These functional blocks (components) are realized by any combination of hardware and / or software. Further, the means for realizing each functional block is not particularly limited. That is, each functional block may be realized by one device in which a plurality of elements are physically and / or logically combined, or two or more devices physically and / or logically separated from each other directly and. / Or indirectly (eg, wired and / or wireless) may be connected and realized by these plurality of devices.

Further, for example, the base station apparatus 10 and the terminal 20 according to the embodiment of the present invention may both function as a computer that performs the processing according to the embodiment of the present invention. FIG. 9 is a diagram showing an example of the hardware configuration of the wireless communication device which is the base station device 10 or the terminal 20 according to the embodiment of the present invention. The above-mentioned base station device 10 and terminal 20 are physically configured as computer devices including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. May be done.

In the following explanation, the word "device" can be read as a circuit, device, unit, etc. The hardware configuration of the base station device 10 and the terminal 20 may be configured to include one or more of the devices shown by 1001 to 1006 shown in the figure, or may be configured not to include some of the devices. You may.

For each function of the base station device 10 and the terminal 20, the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the storage device 1002, and the communication device 1004 communicates and stores the data. It is realized by controlling the reading and / or writing of data in the device 1002 and the auxiliary storage device 1003.

The processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be composed of a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like.

Further, the processor 1001 reads a program (program code), a software module or data from the auxiliary storage device 1003 and / or the communication device 1004 into the storage device 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. For example, the transmission unit 110, the reception unit 120, the setting unit 130, and the control unit 140 of the base station device 10 shown in FIG. 7 may be stored in the storage device 1002 and realized by a control program that operates in the processor 1001. Further, for example, even if the transmission unit 210, the reception unit 220, the setting unit 230, and the control unit 240 of the terminal 20 shown in FIG. 8 are stored in the storage device 1002 and realized by a control program operated by the processor 1001. Good. Although it has been described that the various processes described above are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be mounted on one or more chips. The program may be transmitted from the network via a telecommunication line.

The storage device 1002 is a computer-readable recording medium, and is, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. It may be configured. The storage device 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The storage device 1002 can store a program (program code), a software module, or the like that can be executed to carry out the process according to the embodiment of the present invention.

The auxiliary storage device 1003 is a computer-readable recording medium, and is, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, Blu). -It may be composed of at least one of a ray (registered trademark) disk), a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like. The auxiliary storage device 1003 may be referred to as an auxiliary storage device. The storage medium described above may be, for example, a database, server or other suitable medium containing the storage device 1002 and / or the auxiliary storage device 1003.

The communication device 1004 is hardware (transmission / reception device) for communicating between computers via a wired and / or wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like. For example, the transmission unit 110 and the reception unit 120 of the base station device 10 may be realized by the communication device 1004. Further, the transmission unit 210 and the reception unit 220 of the terminal 20 may be realized by the communication device 1004.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

Further, each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be composed of a single bus or may be composed of different buses between the devices.

Further, the base station device 10 and the terminal 20 are a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), etc., respectively. It may be configured to include hardware, and the hardware may realize a part or all of each functional block. For example, processor 1001 may be implemented on at least one of these hardware.

(Summary of embodiments)
As described above, according to the embodiment of the present invention, it has a transmission unit that transmits a synchronization signal block including a plurality of first synchronization signals and a plurality of second synchronization signals to other terminals. A terminal is provided in which the plurality of first synchronization signals are arranged at intervals.

The above configuration provides a technique for defining the details of the SL-SSB configuration in a wireless communication system that supports direct communication between terminals.

Note that S-PSS is an example of a first synchronization signal, S-SSS is an example of a second synchronization signal, SL-SSB is an example of a synchronization signal block, and PSBCH is broadcast information. This is an example.

(Supplement to the embodiment)
Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art can understand various modifications, modifications, alternatives, substitutions, and the like. There will be. Although explanations have been given using specific numerical examples in order to promote understanding of the invention, these numerical values are merely examples and any appropriate value may be used unless otherwise specified. The classification of items in the above description is not essential to the present invention, and the items described in two or more items may be used in combination as necessary, and the items described in one item may be used in combination with another item. It may be applied (as long as there is no contradiction) to the matters described in. The boundary of the functional unit or the processing unit in the functional block diagram does not always correspond to the boundary of the physical component. The operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components. With respect to the processing procedure described in the embodiment, the order of processing may be changed as long as there is no contradiction. For convenience of processing description, the base station device 10 and the terminal 20 have been described with reference to functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station apparatus 10 according to the embodiment of the present invention and the software operated by the processor of the terminal 20 according to the embodiment of the present invention are random access memory (RAM), flash memory, and read-only, respectively. It may be stored in memory (ROM), EPROM, EEPROM, registers, hard disks (HDD), removable disks, CD-ROMs, databases, servers or any other suitable storage medium.

Further, the notification of information is not limited to the mode / embodiment described in this specification, and may be performed by other methods. For example, information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, etc. Broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals or a combination thereof may be used. RRC signaling may be referred to as an RRC message, for example, RRC. It may be a connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.

Each aspect / embodiment described in the present specification includes LTE (LongTermEvolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (FutureRadioAccess), W-CDMA. (Registered Trademarks), GSM (Registered Trademarks), CDMA2000, UMB (Ultra-Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), It may be applied to systems utilizing Bluetooth®, other suitable systems and / or next-generation systems extended based on them.

The order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present specification may be changed as long as there is no contradiction. For example, the methods described herein present elements of various steps in an exemplary order, and are not limited to the particular order presented.

In some cases, the specific operation performed by the base station apparatus 10 in the present specification may be performed by its upper node (upper node). In a network consisting of one or more network nodes having a base station device 10, various operations performed for communication with the terminal 20 are performed other than the base station device 10 and / or the base station device 10. It is clear that it can be done by other network nodes (eg, MME or S-GW, etc., but not limited to these). Although the case where there is one network node other than the base station apparatus 10 is illustrated above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

Each aspect / embodiment described in the present specification may be used alone, in combination, or switched with execution.

The terminal 20 may be a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, or a wireless device. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

The base station apparatus 10 may be referred to by those skilled in the art by NB (NodeB), eNB (evolvedNodeB), gNB, BaseStation, or some other suitable term.

The terms "determining" and "determining" used in this specification may include a wide variety of actions. “Judgment” and “decision” are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigating (investigating), and searching (looking up) (for example, a table). , Searching in a database or another data structure), confirming (ascertaining) may be regarded as "judgment" or "decision". In addition, "judgment" and "decision" are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (Accessing) (for example, accessing data in memory) may be regarded as "judgment" or "decision". In addition, "judgment" and "decision" mean that "resolving", "selecting", "choosing", "establishing", "comparing", etc. are regarded as "judgment" and "decision". Can include. That is, "judgment" and "decision" may include that some action is regarded as "judgment" and "decision".

The phrase "based on" as used herein does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".

As long as "include", "including", and variations thereof are used within the scope of the present specification or claims, these terms are similar to the term "comprising". Is intended to be inclusive. Furthermore, the term "or" as used herein or in the claims is intended not to be an exclusive OR.

Throughout this disclosure, if articles are added by translation, for example a, an and the in English, these articles will be plural unless the context clearly indicates that they are not. Can include

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 as modifications and modifications without departing from the spirit and scope of the present invention, which is determined by the description of the claims. Therefore, the description of the present specification is for the purpose of exemplification and does not have any limiting meaning to the present invention.

10 Base station device 110 Transmission unit 120 Reception unit 130 Setting unit 140 Control unit 20 Terminal 210 Transmission unit 220 Reception unit 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device

Claims

It has a transmitter that transmits a synchronization signal block including a plurality of first synchronization signals and a plurality of second synchronization signals to other terminals.
The plurality of first synchronization signals are arranged at intervals.
Terminal.
The plurality of first synchronization signals and the plurality of second synchronization signals are arranged alternately.
The terminal according to claim 1.
The synchronization signal block contains one or more broadcast information.
The one or more broadcast information is arranged after the plurality of first synchronization signals and the plurality of second synchronization signals arranged alternately.
The terminal according to claim 2.
The synchronization signal block contains one or more broadcast information.
The one or more broadcast information is arranged before and after the plurality of first synchronization signals and the plurality of second synchronization signals arranged alternately.
The terminal according to claim 2.
The sync signal block comprises symbols for AGC (Automatic Gain Control) and Gap (GAP).
The terminal according to claim 3 or 4.
It has a step of transmitting a synchronization signal block including a plurality of first synchronization signals and a plurality of second synchronization signals to another terminal.
The plurality of first synchronization signals are arranged at intervals.
Communication method of the terminal.