KR20200056321A - Method and apparatus for parameter configuration in vehicle-to-everything system - Google Patents

Abstract

The present invention relates to a communication technique for integrating a 5G communication system with IoT technology to support a higher data rate than a 4G system, and a system thereof. The present disclosure can be applied to intelligent services (e.g., smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security- and safety-related services, etc.) based on 5G communication technology and IoT-related technologies. The present invention discloses a method and apparatus for setting parameters required for a terminal to exchange information using a side link with another vehicle terminal and a pedestrian terminal in a V2X system.

Description

Method and device for parameter setting in V2X system {METHOD AND APPARATUS FOR PARAMETER CONFIGURATION IN VEHICLE-TO-EVERYTHING SYSTEM}

The present invention relates to a mobile communication system, and in particular, a terminal supporting V2X (Vehicle-to-everything) communication sets parameters necessary for transmitting and receiving information using a sidelink with another vehicle terminal and a pedestrian terminal. It relates to a method and apparatus.

Efforts have been made to develop an improved 5G communication system or a pre-5G communication system to meet the increasing demand for wireless data traffic after commercialization of the 4G communication system. For this reason, a 5G communication system or a pre-5G communication system is called a 4G network (Beyond 4G Network) communication system or a LTE (Long Term Evolution) system (Post LTE) system.

To achieve high data rates, 5G communication systems are contemplated for implementation in the ultra-high frequency (mmWave) band (eg, 60 gigabit (60 GHz) band). In order to mitigate the path loss of radio waves in the ultra-high frequency band and increase the transmission distance of radio waves, in 5G communication systems, beamforming, massive array multiple input / output (massive MIMO), full dimensional multiple input / output (FD-MIMO) ), Array antenna, analog beam-forming, and large scale antenna technologies are being discussed.

In addition, to improve the network of the system, in the 5G communication system, the evolved small cell, advanced small cell, cloud radio access network (cloud RAN), ultra-dense network , Device to Device communication (D2D), wireless backhaul, mobile network, cooperative communication, CoMP (Coordinated Multi-Points), and interference cancellation Technology development is being conducted.

In addition, in the 5G system, advanced coding modulation (Advanced Coding Modulation (ACM)), FQAM (Frequency Shift Keying (FSKAM) and Quadrature Amplitude Modulation (QAM)) and SWSC (Sliding Window Superposition Coding), and advanced access technology FBMC (Filter Bank Multi Carrier), NOMA (non orthogonal multiple access), and SCMA (sparse code multiple access) are being developed.

Meanwhile, the Internet is evolving from a human-centered connection network in which humans generate and consume information, to an Internet of Things (IoT) network that exchanges information between distributed components such as objects. Internet of Everything (IoE) technology, in which big data processing technology, etc. through connection to a cloud server, etc. is combined with IoT technology is also emerging. In order to implement IoT, technical elements such as sensing technology, wired / wireless communication and network infrastructure, service interface technology, and security technology are required, and recently, a sensor network for connection between objects, a machine to machine (Machine to Machine) , M2M), MTC (Machine Type Communication) and other technologies are being studied. In an IoT environment, an intelligent IT (Internet Technology) service that collects and analyzes data generated from connected objects to create new values in human life may be provided. IoT is a field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliance, high-tech medical service through convergence and complex between existing IT (information technology) technology and various industries. It can be applied to.

Accordingly, various attempts have been made to apply a 5G communication system to an IoT network. For example, 5G communication technology such as sensor network, machine to machine (M2M), and MTC (Machine Type Communication) is implemented by techniques such as beamforming, MIMO, and array antenna. It is. It may be said that the application of cloud radio access network (cloud RAN) as the big data processing technology described above is an example of 5G technology and IoT technology convergence.

Meanwhile, with the recent development of the V2X system, various studies have been conducted on communication between a terminal supporting V2X and another vehicle terminal and a pedestrian terminal.

The above information is presented only as a background technique for understanding the present disclosure. None of the above is determined as to whether it is applicable as a prior art in connection with the present disclosure, and no claim is made.

The present invention relates to a wireless communication system, and relates to a method and apparatus for setting a parameter required for a terminal supporting V2X to exchange information using a side link with another vehicle terminal and a pedestrian terminal. Specifically, it relates to a base station / terminal setting method and a terminal operation for side link transmission and reception.

Embodiments of the present disclosure are at least to solve the above-described problems and / or disadvantages and to provide the advantages described below.

Method of a first terminal according to an embodiment for solving the above-described problem, determining at least one parameter associated with the neurology of the sidelink (sidelink) signal to be transmitted to the second terminal and at least one parameter And transmitting a sidelink signal to the second terminal based on the result.

The first terminal according to an embodiment for solving the above-described problems, determines at least one parameter related to the neurology of the sidelink signal to be transmitted to the second terminal and the transceiver configured to transmit and receive the signal And a control unit configured to transmit a sidelink signal to the second terminal based on at least one parameter.

Method of a second terminal according to an embodiment for solving the above-described problem, determining at least one parameter related to the neurology of the sidelink (sidelink) signal to be received from the first terminal and at least one parameter And receiving a sidelink signal from the first terminal based on the.

The second terminal according to an embodiment for solving the above-described problem, the transceiver configured to transmit and receive the signal and at least one parameter related to the neurology of the sidelink (sidelink) signal to be received from the first terminal And a control unit configured to determine and receive a sidelink signal from the first terminal based on at least one parameter.

In the present invention, by suggesting a parameter setting method for a terminal supporting V2X, it is possible to improve the reliability of a received signal through a side link in an environment in which flexible parameter setting such as various numerology is supported.

It is apparent to those skilled in the art that other aspects, advantages, and significant features according to various embodiments of the present disclosure may be derived from the accompanying drawings and the detailed description.

1A, 1B, 1C, and 1D are diagrams illustrating a communication system related to an embodiment of the present disclosure.
2 is a diagram illustrating an example of a V2X communication method performed through a side link in connection with an embodiment of the present disclosure.
3 is a diagram illustrating an example of a type of a synchronization signal that a V2X terminal can receive in relation to an embodiment of the present disclosure.
4 is a diagram illustrating an example of a multiplexing method of a control signal and a data signal that a V2X terminal can receive in relation to an embodiment of the present disclosure.
5A, 5B, 5C, and 5D are diagrams illustrating an operation of a terminal acquiring parameter setting information from a base station and receiving a signal in various V2X scenarios in connection with an embodiment of the present disclosure.
6 is a diagram illustrating an example of a terminal operation according to the V2X scenario of FIGS. 5A, 5B, 5C, and 5D according to the proposed embodiments, in connection with an embodiment of the present disclosure.
7 is a diagram illustrating an example of a demodulation reference signal (DMRS) pattern for a physical downlink shared channel (PDSCH) according to configuration information in connection with an embodiment of the present disclosure.
8 is a block diagram illustrating an internal structure of a terminal according to an embodiment of the present disclosure.
9 is a block diagram showing an internal structure of a base station according to an embodiment of the present disclosure.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The following descriptions are provided to assist in a comprehensive understanding of various embodiments of the present disclosure as defined by the claims and their equivalents with reference to the accompanying drawings. Various embodiments include various specifics to aid understanding, but these should be considered exemplary. Accordingly, one of ordinary skill in the art will appreciate that various changes and modifications can be made to the various embodiments described herein without departing from the scope of the present disclosure. In addition, descriptions of known functions and configurations may be omitted for clarity and conciseness.

The terms and words used in the following description and claims are not limited to the literary meaning, but are used as defined to enable a clear and consistent understanding of the present disclosure. Accordingly, it is apparent that the following description of various embodiments of the present disclosure is provided for purposes of illustration only and is not intended to limit the disclosure as defined by the appended claims and their equivalents.

In addition, it should be understood that the singular form in the specification includes a plurality of indication objects unless the context clearly indicates otherwise. Thus, for example, reference to “a component” includes a reference to one or more of such components. In describing an embodiment, it is well known in the art to which this disclosure pertains and is directly related to the present disclosure. Description of the missing technical content is omitted. This is to more clearly and without obscuring the subject matter of the present disclosure by omitting unnecessary description.

For the same reason, some components in the accompanying drawings are exaggerated, omitted, or schematically illustrated. Also, the size of each component does not entirely reflect the actual size. The same reference numbers are assigned to the same or corresponding elements in each drawing.

Advantages and features of the present disclosure, and methods for achieving them will be apparent with reference to embodiments described below in detail in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below, and may be implemented in various different forms, and only the present embodiments allow the present disclosure to be complete, and those skilled in the art to which the present disclosure pertains. It is provided to fully inform the person of the scope of the present disclosure, and the present disclosure is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

At this time, it will be understood that each block of the process flow chart drawings and combinations of the flow chart drawings can be performed by computer program instructions. These computer program instructions may be mounted on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, so that instructions performed through a processor of a computer or other programmable data processing equipment are described in flowchart block (s). It creates a means to perform functions. These computer program instructions can also be stored in computer readable or computer readable memory that can be oriented to a computer or other programmable data processing equipment to implement a function in a particular way, so that computer readable or computer readable memory It is also possible for the instructions stored in to produce an article of manufacture containing instructions means for performing the functions described in the flowchart block (s). Computer program instructions can also be mounted on a computer or other programmable data processing equipment, so a series of operational steps are performed on a computer or other programmable data processing equipment to create a process that is executed by the computer to generate a computer or other programmable data. It is also possible for instructions to perform processing equipment to provide steps for executing the functions described in the flowchart block (s).

Also, each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function (s). It should also be noted that in some alternative implementations, it is also possible that the functions mentioned in the blocks occur out of order. For example, two blocks shown in succession may in fact be executed substantially simultaneously, or it is also possible that the blocks are sometimes executed in reverse order according to a corresponding function.

At this time, the term '~ unit' used in this embodiment means software or hardware components such as a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC), and '~ unit' refers to certain roles. Perform. However, '~ wealth' is not limited to software or hardware. The '~ unit' may be configured to be in an addressable storage medium or may be configured to reproduce one or more processors. Thus, as an example, '~ unit' refers to components such as software components, object-oriented software components, class components and task components, processes, functions, attributes, and procedures. , Subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, database, data structures, tables, arrays, and variables. The functions provided within components and '~ units' may be combined into a smaller number of components and '~ units', or further separated into additional components and '~ units'. In addition, the components and '~ unit' may be implemented to play one or more CPUs in the device or secure multimedia card. Also, in the embodiment, '~ unit' may include one or more processors.

In detail of the embodiments of the present disclosure, the 3GPP (3rd generation partnership project), which is a standardization group for mobile communication standards, specifies New Radio (NR), which is a wireless access network based on 5G mobile communication standards, and packet core (5G System). , Or 5G Core Network, or NG Core: Next Generation Core). However, the main gist of the present disclosure can be applied to other communication systems having similar technical backgrounds with a slight modification within a range that does not significantly depart from the scope of the present disclosure, which can be applied to skilled technical knowledge in the technical field of the present disclosure. It will be possible at the judgment of the possessor.

In the 5G system, a network data collection and analysis function (NWDAF), which is a network function that provides a function for analyzing and providing data collected in a 5G network network, may be defined to support network automation. NWDAF can collect / store / analyze information from 5G network and provide the results to unspecified network functions (NF), and the analysis results can be used independently in each NF.

For convenience of the following description, some terms and names defined in the 3GPP standard (5G, NR, LTE, or a similar system standard) may be used. However, the present disclosure is not limited by terms and names, and may be equally applied to systems conforming to other standards.

In addition, terms used to identify a connection node (node) used in the following description, a term referring to a network object (network entity), a term referring to a message, a term referring to an interface between network entities, various identification information Terms referring to them are exemplified for convenience of explanation. Therefore, it is not limited to the terms used in the present disclosure, and other terms indicating objects having equivalent technical meanings may be used.

Efforts have been made to develop an improved 5G communication system (NR) to meet the growing demand for wireless data traffic after commercialization of the 4G communication system. Unlike LTE, 5G communication system supports various subcarrier spacings (SCS), including 15 kHz, 30 kHz, 60 kHz, and 120 kHz, and the physical control channel uses Polar Coding. The physical data channel (LDPC) uses a low density parity check (LDPC). In addition, in the 5G communication system, a waveform for uplink transmission is used as well as cyclic prefix OFDM (CP-OFDM) as well as discrete Fourier transform spread orthogonal frequency division multiplex (DFT-S-OFDM). In LTE, Hybrid ARQ (HARQ) retransmission in the unit of Transport Block (TB) is supported, while 5G may additionally support HARB retransmission based on Code Block Group (CBG) in which multiple Code Blocks (CBs) are bundled.

In this way, various services can be provided to the user in the communication system, and a method and apparatus using the same can be provided within the same time period according to the characteristics of each service in order to provide various services to the user. Various services provided in 5G communication systems are being researched, and one of them is a service that satisfies the requirements of low latency and high reliability.

In the case of vehicle communication, LTE-based V2X based on the D2D (Device-to-Device) communication structure has been standardized in 3GPP Rel-14 and Rel-15, and efforts to develop V2X based on 5G NR have been recently conducted. Is becoming. NR V2X will support unicast communication between a terminal and a terminal, groupcast (or multicast) communication, and broadcast communication. In addition, NR V2X is a group driving (Platooning), advanced driving (Extended Sensor), extended sensor (Remote Sensor) and remote driving (Remote Driving) Together, it aims to provide more advanced services.

As described above, the NR system is characterized by flexible system operation compared to the conventional 4G system. Specifically, a variety of neurology is supported in the link between the terminal and the base station of the NR system, and it is possible to set parameters for the subcarrier spacing (SCS). For example, in the case of a PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal) transmitted / received in an initial access step, up to two different SCSs may be set according to a frequency band. In the case of PBCH (Physical Broadcast Channel), the same SCS as PSS / SSS is set. For PRACH (Physical Random Access Channel), Msg1 is set through SIB (System Information Block), Msg2 / Msg4 is set through MIB (Master Information Block), and in the case of Msg3, Msg1 is set without base station setting. It can be set the same as the SCS, or the subcarrier width can be set through the SIB. In addition, after the initial connection step, the SCS is set through RRC (Radio Resource Control). In the terminal-base station link of the NR system, the SCS of the initial access step and the SCS for reception of control and data signals after the initial access step may be set differently.

Therefore, when the NR V2X terminal supports various neurology and the NR V2X terminal communicates through a side link, it is necessary to know information about the SCS transmitted by the other terminal in order to receive a signal transmitted from the other terminal. Specifically, it may be considered that the SCS of the synchronization signal transmitted from the NR V2X terminal and the SCS of the control and data signals are set differently. If various SCSs are set, the UE may not only have to blindly detect the SCS in the process of synchronizing with the base station, but also may have a burden of blindly detecting the SCS for the synchronization signal transmitted by the UE. In addition, if the NR V2X terminal is supported so that the SCS of the synchronization signal and the control and data signals can be set differently, it is difficult for the terminal to receive the synchronization signal, control and data signals from the terminal set to another SCS.

In addition, CP-OFDM is used as well as DFT-S-OFDM as a waveform for uplink transmission between the terminal and the base station of the NR system. Therefore, when the NR V2X terminal supports a plurality of waveforms, when the NR V2X terminal communicates through a side link, it is necessary to know the waveform information transmitted by the other terminal in order to receive a signal transmitted from the other terminal. In addition, in the link between the terminal and the base station of the NR system, the setting for the reference signal (RS) can be operated very flexibly. For example, in the case of DMRS (Demodulation Reference Signal) for data reception, various patterns can be set through RRC. Therefore, if the NR V2X terminal supports flexible reference signal pattern setting, when the NR V2X terminal communicates through the side link, in order to receive the signal transmitted from the other terminal, it is necessary to know the information of the reference signal transmitted by the other terminal. Needs to be. In order to support such a scenario, unlike the conventional LTE D2D or LTE V2X technology, in the NR V2X, a vehicle terminal uses a side link with another vehicle terminal and a pedestrian mobile terminal to set and transmit a synchronization signal, a control signal, and a data signal. And a device.

1A, 1B, 1C, and 1D are diagrams illustrating a communication system related to an embodiment of the present disclosure.

1A is an example of a case in which all V2X terminals (UE-1 and UE-2) are located within coverage (ie, in-coverage) of a base station.

All V2X terminals can receive data and control information through a downlink (DL) from a base station or transmit data and control information through an uplink (UL) to a base station. At this time, the data and control information may be data and control information for V2X communication. Alternatively, the data and control information may be data and control information for general cellular communication. In addition, V2X terminals can transmit / receive data and control information for V2X communication through a sidelink (SL).

FIG. 1B is an example of a case where UE-1 among V2X terminals is located within the coverage of the base station and UE-2 is located outside the coverage of the base station. The example according to FIG. 1B can be referred to as an example of partial coverage.

The UE-1 located within the coverage of the base station may receive data and control information from the base station through DL (DL) or transmit data and control information through UL (UL) to the base station.

UE-2 located outside the coverage of the base station cannot receive data and control information from the base station through the downlink, and cannot transmit data and control information through the uplink to the base station.

UE-2 can transmit / receive data and control information for V2X communication through UE-1 and a side link.

1C is an example of a case in which all V2X terminals are located outside the coverage of the base station (ie, out-of coverage).

Therefore, UE-1 and UE-2 cannot receive data and control information from the base station through downlink, and cannot transmit data and control information through the uplink to the base station.

UE-1 and UE-2 can transmit / receive data and control information for V2X communication through a side link.

1D is an example of a scenario for performing V2X communication between terminals located in different cells (ie, inter-cell V2X communication). Specifically, in FIG. 1D, the V2X transmitting terminal and the V2X receiving terminal are connected to different base stations (RRC connected state) or camping (RRC disconnected state, that is, RRC idle state). In this case, UE-1 may be a V2X transmitting terminal and UE-2 may be a V2X receiving terminal. Alternatively, UE-1 may be a V2X receiving terminal, and UE-2 may be a V2X transmitting terminal. UE-1 can receive a V2X-only System Information Block (SIB) from a base station to which it is connected (or to which it is camping), and UE-2 is another to which it is connected (or to which it is camping). V2X dedicated SIB can be received from the base station. At this time, the information of the V2X dedicated SIB received by the UE-1 and the information of the V2X dedicated SIB received by the UE-2 may be different from each other. Therefore, in order to perform V2X communication between terminals located in different cells, information can be unified or more flexible parameter setting can be supported through the proposed parameter setting method and device.

1A, 1B, 1C, and 1D illustrate a V2X system composed of two terminals (UE-1 and UE-2) for convenience of description, but the proposed embodiment is not limited thereto. In addition, the uplink and downlink between the base station and the V2X terminals may be referred to as a Uu interface, and the sidelink between V2X terminals may be referred to as a PC5 interface. Therefore, in this disclosure, these can be used interchangeably.

Meanwhile, in the present disclosure, the terminal refers to a vehicle supporting vehicle-to-vehicle communication (Vehicular-to-Vehicular: V2V), a vehicle or pedestrian handset supporting vehicle-to-Pedestrian (V2P) communication (ie , Smartphone), a vehicle that supports vehicle-to-network communication (Vehicular-to-Network: V2N), or a vehicle that supports vehicle-to-infrastructure communication (Vehicular-to-Infrastructure: V2I) Can be. In addition, in the present disclosure, the terminal may mean an RSU (Road Side Unit) equipped with a terminal function, an RSU equipped with a base station function, or an RSU equipped with a part of the base station function and a part of the terminal function.

In addition, in the present disclosure, the base station may be a base station supporting both V2X communication and general cellular communication, or a base station supporting only V2X communication. In this case, the base station may mean a 5G base station (ie, gNB), a 4G base station (ie, eNB), or RSU. Therefore, unless otherwise specified in the present disclosure, the base station and the RSU can be used interchangeably because they can be used in the same concept.

2 is a diagram illustrating an example of a V2X communication method performed through a side link in relation to an embodiment of the present disclosure.

As shown in FIG. 2A, a transmitting terminal (TX terminal) and a receiving terminal (RX terminal) may perform one-to-one communication, and this may be referred to as unicast communication.

As shown in FIG. 2B, the TX terminal and the RX terminal can perform one-to-many communication, and this can be called groupcast or multicast.

In FIG. 2B, UE-1, UE-2, and UE-3 form a group (eg, group A) to perform groupcast communication, and UE-4, UE-5, and UE- 6, and UE-7 forms another group (for example, group B) to perform groupcast communication. Each terminal performs groupcast communication only within the group to which it belongs, and communication between different groups is not performed. 2B illustrates a case where two groups are formed, but is not limited thereto.

Meanwhile, although not illustrated in FIG. 2, V2X terminals can perform broadcast communication. The broadcast communication means a case where all V2X terminals receive data and control information transmitted by the V2X transmitting terminal through a side link. For example, assuming that UE-1 in FIG. 2B is a transmitting terminal for broadcast, all terminals (UE-2, UE-3, UE-4, UE-5, UE-6, and UE) -7) may receive data and control information transmitted by the UE-1.

Unlike in LTE V2X, in NR V2X, support of a vehicle terminal in which data is transmitted to only a specific node through unicast and data transmission to a specific number of nodes through groupcast may be considered. have. For example, these unicast and groupcast technologies may be usefully considered in consideration of service scenarios such as platforming, which is a technology of moving two or more vehicles in a network by connecting two or more vehicles with one network. Specifically, unicast communication may be required for the purpose of controlling a specific node by a leader node of a group connected by flattening, and groupcast communication may be required for the purpose of simultaneously controlling a group of a plurality of nodes. have.

3 is a diagram illustrating an example of a type of a synchronization signal that a V2X terminal can receive in relation to an embodiment of the present disclosure.

Specifically, the V2X terminal may receive the following sidelink synchronization signals from various sidelink synchronization sources.

* V2X terminal can directly receive synchronization signals from Global Navigation Satellite System (GNSS) or Global Positioning System (GPS).

-In this case, the sidelink synchronization signal source may be GNSS or GPS.

* The V2X terminal can indirectly receive a synchronization signal from a Global Navigation Satellite System (GNSS) or a Global Positioning System (GPS).

-Indirectly receiving a synchronization signal from GNSS means that the V2X terminal-A receives a sidelink synchronization signal (SLSS) transmitted by V2X terminal-1 directly synchronizing with GNSS. have. At this time, the V2X terminal-A may receive a synchronization signal through 2-hop from GNSS. As another example, V2X terminal-2 in synchronization with SLSS transmitted by V2X terminal-1 synchronizing to GNSS may transmit SLSS. The V2X terminal-A receiving this may receive a synchronization signal through 3-hops from the GNSS. Similarly, the V2X terminal-A may receive a synchronization signal through three or more hops from the GNSS.

-In this case, the sidelink synchronization signal source may be another V2X terminal synchronized with GNSS.

* V2X terminal can directly receive a synchronization signal from an LTE base station (eNB).

-The V2X terminal can directly receive a primary synchronization signal (PSS) / secondary synchronization signal (SSS) transmitted from the LTE base station.

-In this case, the sidelink synchronization signal source may be the eNB.

* The V2X terminal may indirectly receive a synchronization signal from an LTE base station (eNB).

-Indirectly receiving a synchronization signal from the eNB may mean a case where the V2X terminal-A receives the SLSS transmitted by the V2X terminal-1 directly synchronizing with the eNB. At this time, V2X terminal-A may receive a synchronization signal through 2-hop from the eNB. As another example, V2X terminal-2 in synchronization with the SLSS transmitted by V2X terminal-1 directly synchronizing with the eNB may transmit SLSS. The V2X terminal-A receiving this may receive a synchronization signal through 3-hop from the eNB. Similarly, the V2X terminal-A may receive a synchronization signal through 3-hop or more from the eNB.

In this case, the sidelink synchronization signal source may be another V2X terminal synchronized with the eNB.

* V2X terminal can indirectly receive a synchronization signal from the NR base station (gNB).

-Indirectly receiving a synchronization signal from the gNB may mean a case in which another V2X terminal-A receives SLSS transmitted by the V2X terminal-1 directly synchronizing with the gNB. At this time, the V2X terminal-A may receive a synchronization signal through 2-hop from the gNB. As another example, V2X terminal-2 synchronizing with the SLSS transmitted by V2X terminal-1 directly synchronizing with the gNB may transmit SLSS. The V2X terminal-A receiving this may receive a synchronization signal through 3-hop from the gNB. Similarly, V2X terminal-A may receive a synchronization signal from the gNB through three or more hops.

In this case, the sidelink synchronization signal source may be another V2X terminal synchronized with the gNB.

* V2X terminal-A can directly receive a synchronization signal from another V2X terminal-B.

-If the V2X terminal-B does not detect the SLSS transmitted from the GNSS, gNB, eNB or another V2X terminal as a synchronization signal source, the V2X terminal-B may transmit the SLSS based on its timing. The V2X terminal-A may directly receive the SLSS transmitted by the V2X terminal-B.

In this case, the sidelink synchronization signal source may be a V2X terminal.

* V2X terminal-A may indirectly receive a synchronization signal from another V2X terminal-B.

-Indirectly receiving a synchronization signal from the V2X terminal-B may mean a case where the V2X terminal-A receives the SLSS transmitted by the V2X terminal-1 directly synchronizing with the V2X terminal-B. At this time, V2X terminal-A may receive a synchronization signal through 2-hop from V2X terminal-B. As another example, V2X terminal-2 synchronizing with the SLSS transmitted by V2X terminal-1 directly synchronizing with V2X terminal-B may transmit SLSS. The V2X terminal-A receiving this may receive a synchronization signal through 3-hop from the V2X terminal-B. Similarly, V2X terminal-A may receive a synchronization signal from V2X terminal-B through three or more hops.

In this case, the sidelink synchronization signal source may be another V2X terminal synchronized with the V2X terminal.

The sidelink synchronization signal referred to in this specification may mean a sidelink synchronization signal block (S-SSB: Sidelink Synchronization Signal Block), and S-SSB is a sidelink primary synchronization signal (S-PSS), sidelink secondary synchronization signal ( It may be composed of a sidelink synchronization signal (SLSS) composed of S-SSS and a physical sidelink broadcast channel (PSBCH). At this time, S-PSS may be composed of a Zadoff-Chu sequence or M-sequence, and S-SSS may be composed of an M-sequence or gold sequence. Similar to PSS / SSS in a cellular system, a sidelink ID may be transmitted only through S-SSS, not a combination of S-PSS and S-SSS or a combination of the two. The PSBCH can transmit a master information block (MIB) for sidelink communication, such as a physical broadcast channel (PBCH) of a cellular system. Unlike the sidelink synchronization signal block (S-SSB) in this specification, the synchronization signal between the base station and the terminal is referred to as a synchronization signal block (SSB) and specifies that the SSB can be composed of PSS / SSS and PBCH.

4 is a diagram illustrating an example of a method of multiplexing a control signal and a data signal that can be received by a V2X terminal in relation to an embodiment of the present disclosure. In the case of NR V2X sidelink, the data channel (Physical Sidelink Shared Channel, PSSCH) and the control channel (Physical Sidelink Control Channel, PSCCH) are combined with FDM (Frequency Domain Multiplexing), and TDM (Time Domain Multiplexing) is also considered. Can be. Specifically, in FIG. 4A, FIG. 4B, FIG. 4C, and FIG. 4D, PSSCH and PSCCH are multiplexed. Each multiplexing method is described below.

* Figure 4a: the control channel and its associated data channel is transmitted non-overlapping from the resource in time, the frequency resources used by the two channels are the same

* Figure 4b: the control channel and the associated data channel is transmitted non-overlapping from the time resource, the frequency resources used by the two channels may be different

* Figure 4c: the control channel and its associated data channel is non-overlapping from the resource in frequency and transmitted as a time resource, and the time resource used by the two channels is the same

* FIG. 4D: A part of the control channel and a data channel associated therewith are overlapped in a time resource and transmitted as a non-overlapping frequency resource, but another associated data channel or a part of another control channel is transmitted non-overlapping in a time resource .

FIG. 4 shows a case in which a control channel occupies 1 symbol and a data channel occupies 5 symbols in time, and the actual control channel and the number of symbols through which the data channel is transmitted may vary. In addition, in the NR V2X system, one or more of the multiplexing methods of the PSSCH and PSCCH may be supported.

In addition, the NR V2X system may support receiving a feedback signal from a physical sidelink feedback channel (PSFCH). Unlike the existing LTE V2X system, when channel information is fed back through PSFCH, transmission efficiency can be increased by setting and transmitting appropriate transmission parameters using feedback information in a channel environment where feedback information is valid.

5A, 5B, 5C, and 5D, in connection with the present disclosure, in various V2X scenarios, as described in FIGS. 1A, 1B, 1C, and 1D, a terminal performs a synchronization signal block (SSB) from a base station Receiving a procedure, receiving a side-link synchronization signal block (S-SSB) between terminals, receiving a sidelink control signal (PSCCH) and a data signal (PSSCH), and receiving a sidelink feedback signal (PSFCH) This is a diagram for explaining the operation of the terminal in the procedure.

FIG. 5A is an example of a case in which all V2X terminals (UE-1 and UE-2) are located in a coverage (ie, in-coverage) of a base station as in FIG. 1A. At this time, the V2X terminals can be allocated a resource pool that can be used for sidelink communication through synchronization of the SSB transmitted from the base station and V2X dedicated SIB information received from the base station. The resource pool refers to a time and frequency resource used in V2X to transmit and receive information using a side link with another vehicle terminal and a pedestrian mobile terminal. In FIG. 5A, the resource pool used for transmission by the terminal is shown as TxPool, and the resource pool used for reception by the terminal is shown as RxPool. For reference, in FIG. 5A, the resource pool is illustrated based on an operation in which UE-1 receives PSCCH and PSSCH from UE-2. In FIG. 5A, since V2X terminals within coverage of the base station are synchronized with the base station, it is possible for UE-1 and UE-2 to transmit and receive PSCCH and PSSCH using a side link without additional synchronization procedure. However, if the V2X UEs in FIG. 5A have different parameter information for PSCCH and PSSCH transmission or for PSFCH transmission, UE-1 needs to acquire configuration information for it before receiving PSCCH and PSSCH from UE-2. Likewise, before UE-2 receives PSCCH and PSSCH from UE-1, it must acquire configuration information about it. In addition, when the terminal receiving the PSCCH and the PSSCH feeds back the channel information through the PSFCH, the terminal receiving the PSCCH and the PSSCH must acquire configuration information for it. Here, the parameter information for PSCCH and PSSCH reception includes subcarrier spacing (SCS), CP length, waveform, reference signal scrambling ID, and DMRS / CSI-RS (channel state information reference signal) for PSCCH and PSSCH. ) May include information such as a pattern. Further, the parameter information for PSFCH reception may include information such as subcarrier spacing (SCS), CP length, and waveform for the PSFCH.

FIG. 5B is an example of partial coverage, in which UE-1 is located within the coverage of the base station and UE-2 is located outside the coverage of the base station, as in FIG. 1B. At this time, V2X terminals within the coverage of the base station can be synchronized with the SSB transmitted from the base station and allocated a resource pool that can be used for sidelink communication through V2X dedicated SIB information received from the base station. However, V2X terminals outside the coverage of the base station first monitor the synchronization signal in order to synchronize, and if a synchronization signal is detected, synchronize the synchronization with the source and the synchronization signal. However, when a synchronization signal is not detected, the corresponding V2X terminal directly transmits a synchronization signal to synchronize with the source receiving the synchronization signal. In addition, since V2X terminals outside the coverage of the base station cannot receive SIB information from the base station, they transmit and receive signals using a preset resource pool. In FIG. 5B, a resource pool used for transmission by a terminal outside the coverage of the base station is illustrated as Preconfig-TxPool, and a resource pool used for receiving a signal from a terminal outside the coverage of the base station is illustrated as Preconfig-RxPool. For reference, in FIG. 5B, the resource pool is illustrated based on an operation in which UE-1 receives PSCCH and PSSCH from UE-2. In FIG. 5B, a synchronization procedure must be performed before UE-1 in coverage of the base station receives PSCCH and PSSCH from UE-2 outside the coverage of the base station. Likewise, a synchronization procedure must be performed before UE-2 outside the coverage of the base station receives PSCCH and PSSCH from UE-1 within the coverage of the base station. Therefore, in the partial coverage scenario of FIG. 5B, if the parameter information for the synchronization signal transmission is differently set for the V2X terminals, the terminal receiving the synchronization signal must acquire configuration information for this. Here, the parameter information for receiving the synchronization signal may include information such as subcarrier spacing (SCS), CP length, waveform, time / frequency / code resources for the S-SSB, and the like. In addition, if the parameter information for the PSCCH and PSSCH transmission is differently set in the V2X terminals in FIG. 5B, UE-1 must acquire configuration information for the PSCCH and PSSCH before receiving the PSCCH and PSSCH from the UE-2. Likewise, before UE-2 receives PSCCH and PSSCH from UE-1, it must acquire configuration information about it. Here, the parameter information for PSCCH and PSSCH reception may include subcarrier spacing (SCS), CP length, waveform for the PSCCH and PSSCH, scrambling ID of the reference signal, DMRS / CSI-RS pattern, and the like. . In addition, if the parameters for PSFCH transmission are differently set for the V2X terminals in FIG. 5B, when the terminal receiving the PSCCH and the PSSCH feeds back channel information through the PSFCH, the terminal receiving it must obtain configuration information for it. The parameter information for PSFCH reception may include information such as subcarrier spacing (SCS), CP length, and waveform for the PSFCH.

FIG. 5C is an example of a case in which all V2X terminals are located out-of-coverage of the base station as in FIG. 1C. At this time, V2X terminals outside the coverage of the base station first monitor the synchronization signal in order to synchronize, and if a synchronization signal is detected, synchronize the synchronization with the source and the transmitted signal. However, when a synchronization signal is not detected, the corresponding V2X terminal directly transmits a synchronization signal to synchronize with the source receiving the synchronization signal. In addition, since V2X terminals outside the coverage of the base station cannot receive SIB information from the base station, they transmit and receive signals using a preset resource pool. In FIG. 5C, a resource pool used for transmission by a terminal outside the coverage of the base station is illustrated as Preconfig-TxPool, and a resource pool used for receiving a signal from a terminal outside the coverage of the base station is illustrated as Preconfig-RxPool. For reference, in FIG. 5C, the resource pool is illustrated based on an operation in which UE-1 receives PSCCH and PSSCH from UE-2. In FIG. 5C, a synchronization procedure must be performed before UE-1 receives PSCCH and PSSCH from UE-2. Similarly, before UE-2 receives PSCCH and PSSCH from UE-1, a synchronization procedure must be performed. Accordingly, if the parameter information for the synchronization signal transmission is differently set for the V2X terminals in the scenario outside the base station coverage of FIG. 5C, the terminal receiving the synchronization signal must acquire configuration information for this. Here, the parameter information for receiving the synchronization signal may include information such as subcarrier spacing (SCS), CP length, waveform, time / frequency / code resources for the S-SSB, and the like. In addition, if the parameter information for the PSCCH and PSSCH transmission is differently set in the V2X terminals in FIG. 5C, the UE-1 needs to acquire configuration information for the PSCCH and PSSCH before receiving the UEC. Likewise, before UE-2 receives PSCCH and PSSCH from UE-1, it must acquire configuration information about it. Here, the parameter information for PSCCH and PSSCH reception may include information such as subcarrier spacing (SCS), CP length, waveform, reference signal scrambling ID, and DMRS / CSIRS patterns for PSCCH and PSSCH. In addition, if the parameters for PSFCH transmission of V2X terminals are differently set in FIG. 5C, when the UE receiving PSCCH and PSSCH feeds back channel information through PSFCH, the UE receiving it must obtain configuration information for it. The parameter information for PSFCH reception may include information such as subcarrier spacing (SCS), CP length, and waveform for the PSFCH.

5D is an example of a scenario (ie, inter-cell V2X communication) for performing V2X communication between terminals located in different cells as in FIG. 1D. At this time, V2X terminals belonging to each cell can be synchronized with the PSS / SSS transmitted from the base station and allocated a resource pool that can be used for sidelink communication through V2X dedicated SIB information received from the base station. At this time, the resource pool allocation information may include pool information of V2X terminals belonging to each cell as well as pool information of V2X terminals belonging to another cell. In FIG. 5D, the resource pool used for transmission by the terminal is shown as TxPool, and the resource pool used for reception by the terminal is shown as RxPool. For reference, in FIG. 5D, the resource pool is illustrated based on an operation in which UE-1 receives PSCCH and PSSCH from UE-2. Accordingly, referring to FIG. 5D, the received resource pool information transmitted through the SIB to UE-1 in base station-1 may include received resource pool information corresponding to resource pool information transmitted from UE-2 in base station-2. In the scenario of FIG. 5D, V2X terminals belonging to each base station share resource pool information so that information can be transmitted and received through side links with V2X terminals belonging to other base stations through information sharing between base stations, and the UEs from the resource pool information It may be possible to determine whether additional synchronization procedures are required or not prior to reception of the PSCCH and PSSCH.

For example, in FIG. 5D, RxPool 1 to 3 may be assumed to be a resource pool in which synchronization is already synchronized before UE1 receives PSCCH and PSSCH. In other words, the terminals belonging to each base station are already synchronized with each base station, and the terminals belonging to each base station do not need to synchronize additional synchronization for side link transmission and reception. In this case, it is possible for UE-1 and UE-2 to transmit and receive PSCCH and PSSCH using a side link without additional synchronization procedure. In contrast, RxPool 4 to 5 in FIG. 5D may be assumed to be a resource pool in which UE1 needs to additionally synchronize before receiving PSCCH and PSSCH. Specifically, the terminals belonging to each base station are already synchronized from each base station, but since the synchronization of each base station is different, a terminal belonging to each base station needs to synchronize additional synchronization for transmission / reception through a side link. In this case, UE-1 and UE-2 must undergo an additional synchronization procedure to receive PSCCH and PSSCH from each terminal. In the above, whether or not additional synchronization procedures are required before UEs receive the PSCCH and PSSCH from the resource pool can be determined according to whether or not a field for parameter information related to another base station is included in the resource pool information in the SIB dedicated to V2X. . For example, in FIG. 5D, for RxPool 4 to 5, a field for parameter information related to other base stations is included in a corresponding resource pool, and timing information and synchronization information for other base stations may be included in this field for synchronization. . For example, timing information may include UL / DL configuration information of other base stations, and synchronization information may include Physical Cell ID and SLSS ID information of other base stations required for synchronization. Accordingly, when V2X terminals belonging to different base stations transmit and receive through a side link through information sharing between base stations as shown in FIG. 5D, if it is determined that additional synchronization needs to be achieved through resource pool information, parameters for transmitting a synchronization signal to each base station If the information is set differently, the terminal receiving the synchronization signal must acquire the setting information for it.

At this time, the parameter information for receiving the synchronization signal may include information such as subcarrier spacing (SCS), CP length, waveform, time / frequency / code resources for the S-SSB. In addition, if parameter information for PSCCH and PSSCH transmission of V2X terminals belonging to each base station in FIG. 5D is set differently, UE-1 needs to acquire configuration information for it before receiving PSCCH and PSSCH from UE-2. Likewise, before UE-2 receives PSCCH and PSSCH from UE-1, it must acquire configuration information about it. Here, the parameter information for PSCCH and PSSCH reception may include information such as subcarrier spacing (SCS), CP length, waveform, reference signal scrambling ID, DMRS / CSIRS pattern for PSCCH and PSSCH. In addition, if the parameters for PSFCH transmission of V2X terminals are differently set in FIG. 5D, when the UE receiving PSCCH and PSSCH feeds back channel information through PSFCH, the UE receiving it must obtain configuration information for it. The parameter information for PSFCH reception may include information such as subcarrier spacing (SCS), CP length, and waveform for the PSFCH.

5A to 5D, the communication method between the two terminals through the side link is described as a reference, but the proposed method can be applied to both unicast, groupcast, and broadcast V2X communication as shown in FIG. 2 as well as communication between the two terminals. have.

5A to 5D, in NR V2X, in order to exchange information using a side link with another vehicle terminal and a pedestrian portable terminal in a NR V2X, it is necessary to obtain setting information for related parameters in advance. Therefore, various methods for receiving these parameters are proposed below, and the operation of the terminal having the parameters set according to the proposed method will be described in detail.

First, in the NR system, a method is proposed in which a vehicle terminal sets parameters required to exchange information using a side link with another vehicle terminal and a pedestrian portable terminal. 5A to 5D, a procedure for two terminals to receive a synchronization signal block (SSB) from a base station, a procedure for receiving a side-to-end sidelink synchronization signal block (S-SSB), and a sidelink control signal (PSCCH) ) And data signal (PSSCH), and in the procedure of receiving the sidelink feedback signal (PSFCH), when the two terminals perform communication between the terminals in a different state, the terminals are set to the set parameters. It may be possible to receive the corresponding signal only after obtaining the setting information for it.

Specifically, various neurology is supported in the NR V2X system, and accordingly, the SCS used for transmission of SSB, S-SSB, PSCCH, PSSCH, and PSFCH can be set differently between terminals. In the V2X system, setting the SCS largely can be very effective for a terminal moving at high speed. As the SCS becomes larger, the symbol duration becomes shorter, which is advantageous for tracking channels that change over time. Table 1 below shows the various neurology defined in the terminal-base station link of the NR system. SCS Δf is determined according to the neuromerology μ, and the supported CP length is determined. Table 1 shows the OFDM symbol and CP length according to pneumonology.

[Table 1]

In addition, Tables 2 and 3 show the number of OFDM symbols per slot, the number of slots per frame, and the number of slots per subframe in normal CP (NCP) and extended CP (ECP), respectively.

[Table 2]

[Table 3]

As shown in Tables 1 to 3, when NCP and ECP are supported in the NR V2X system, CP length used for transmission of SSB, S-SSB, PSCCH, PSSCH, and PSFCH and the number of OFDM symbols per corresponding slot , It is possible that the number of slots per frame and the number of slots per subframe are set differently between terminals.

In addition, CP-OFDM is used as well as DFT-S-OFDM as a waveform for uplink transmission between the terminal and the base station of the NR system. Therefore, it has been previously described that different waveforms can be set between terminals when the NR V2X terminal supports a plurality of waveforms.

In addition, as described in FIG. 4, one or more multiplexing methods for PSCCH and PSSCH may be supported in the NR V2X system. In this case, the setting for this may also vary between terminals. In addition, the number of symbols through which the PSCCH is transmitted may also be fixed or configurable. If the number of symbols for which the PSCCH is transmitted is configurable, the setting for this may vary between terminals. In addition, in the NR V2X system, the mapping type of the PSSCH and the information of the slot through which the PSSCH is transmitted and the DMRS pattern information are supported flexibly, so that it is possible to set parameters for the terminals differently. For example, in the case of a terminal-base station link of the NR system, type A (type A) and type B (type B) are defined as a physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH) mapping type. In the PDSCH or PUSCH mapping type A, the first symbol of the DMRS symbol is located in the second or third OFDM symbol in the slot, and the PDSCH or PUSCH mapping type B is among the DMRS symbols in the first OFDM symbol of the time domain resource allocated by PUSCH transmission. The first symbol is located. In the case of data transmission for PDSCH or PUSCH, time domain resource assignment may be transmitted by information on a slot in which data is transmitted and a starting symbol position S in the corresponding slot and the number of symbols L to which data is mapped. have. In the above, S may be a relative position from the start of the slot, L may be the number of consecutive symbols, and S and L may be determined from a start and length indicator value (SLIV) defined as follows. have.

if (L-1) ≤7 then

SLIV=14*(L-1)+S

SLIV = 14 * (L-1) + S

else

SLIV=14*(14-L+1)+(14-1-S)

SLIV = 14 * (14-L + 1) + (14-1-S)

where 0 <L≤14-S

In the NR system, in general, through RRC configuration, the UE may set a table including SLIV values in one row, PDSCH or PUSCH mapping type, and information on a slot in which a PDSCH or PUSCH is transmitted. Thereafter, the base station indicates an index value in the set table for time domain resource allocation of the DCI (downlink control information), so that the base station transmits the SLIV value, PDSCH or PUSCH mapping type, PDSCH or PUSCH to the UE. You can convey information about. In addition, detailed information on the DMRS pattern for the PDSCH or PUSCH as well as the first symbol position of the DMRS according to the PDSCH or PUSCH mapping type is set through RRC. For example, a 4-symbol DMRS pattern may be set for a high-speed terminal, and a 2-symbol DMRS pattern may be set for a low-speed terminal. Therefore, when such flexibility is applied to the PSSCH of the NR V2X system, the mapping type of the PSSCH, the slot information through which the PSSCH is transmitted, and the DMRS pattern information may be set differently for each UE. In addition, when CSI-RS for a V2X system is introduced for channel information feedback in an NR V2X system, configuration information on the CSI-RS may also be different for each terminal.

According to the above description, the following parameters are used in the procedure of receiving the inter-terminal sidelink synchronization signal block (S-SSB), the sidelink control signal (PSCCH) and the data signal (PSSCH), and the feedback signal (PSFCH). It can be set differently.

* Parameters for information such as SCS, CP length, waveform, time / frequency / code resources for S-SSBs of two terminals may be set differently.

* Parameters for information such as SCS, CP length, waveform, reference signal scrambling ID, DMRS / CSIRS pattern, time / frequency / code resource for PSCCH and PSSCH of the two terminals may be set differently.

* Parameters for information such as SCS, CP length, and waveform for PSFCH of two terminals may be set differently.

As described above, when communication between two terminals is performed in a state in which the set parameters are different, reception of a corresponding signal may be possible only when setting information about the set parameters between terminals is acquired. Accordingly, various embodiments in which the base station or the terminal sets the above parameters are proposed as follows. On the other hand, in the foregoing description, a process in which the V2X terminal is allocated a resource pool to be used for sidelink communication by receiving the V2X SIB from the base station has been described. However, the resource pool hereinafter may include a resource pool that is not only received by the terminal through the SIB but also updated by the terminal in the RRC connection state additionally received from the base station.

Parameter setting method in NR sidelink communication system

* Alt-1: Connected to resource pool information in V2X-SIB, setting information for S-SSB or PSCCH / PSSCH / PSFCH of other terminals is indicated

* Alt-2: Setting information for S-SSB or PSCCH / PSSCH / PSFCH of another terminal is indicated in a field containing parameter information related to another base station among resource pool information in V2X-SIB.

* Alt-3: Setting information for S-SSB or PSCCH / PSSCH / PSFCH of another terminal is fixed as default

* Alt-4: PSBCH includes PSCCH / PSSCH / PSFCH configuration information of other terminals

* Alt-5: Sidelink control information (SCI) that the UE transmits to another UE includes configuration information for PSCCH / PSSCH / PSFCH of the other UE

In the above, the S-SSB parameter and setting information of the other terminal may include at least one of the following.

* Information such as SCS, CP length, waveform, time / frequency / code resource for S-SSB

In addition, in the above, the PSCCH / PSSCH parameter and configuration information of the other terminal may include at least one of the following.

* Information such as SCS, CP length, waveform, reference signal scrambling ID, DMRS / CSI-RS pattern, time / frequency / code resources for PSCCH and PSSCH

In the above, the PSFCH parameter and setting information of another terminal may include at least one of the following.

* Information such as SCS, CP length and waveform for PSFCH

In the above, information such as time / frequency / code resources may be multiplexed information for the PSSCH and PSCCH shown in FIG. 4. If one or more multiplexing methods among the methods shown in FIG. 4 are supported, signaling to indicate this may be necessary.

In addition, as described above, S-SSB may be composed of SLSS and PSBCH. In addition, the synchronization procedure using S-SSB can be performed as follows.

* First, the terminal searches for a synchronization signal using S-SSB reception parameters and setting information, and when a synchronization signal is detected, synchronization is performed.

* If the synchronization signal is not detected, the terminal transmits the S-SSB using S-SSB transmission parameters and configuration information, and performs synchronization through this.

* S-SSB transmission parameter and setting information and S-SSB reception parameter and setting information may be the same or different.

Among the proposed methods, Alt-1 is a method of setting reception parameter information for S-SSB, PSCCH, PSSCH, and PSFCH in RX resource pool information in V2X-SIB. As described above, the resource pool refers to time and frequency resources used in V2X to transmit and receive information using a side link with other vehicle terminals and pedestrian terminals. For a more detailed setting method for Alt-1, refer to Example 1 to be described later. Alt-2 is a method of setting reception parameter information for S-SSB, PSCCH, PSSCH, and PSFCH in a field containing parameter information related to another base station among common resource pool information in V2X-SIB. Unlike Alt-1, Alt-2 is a method that can be set only when a field for parameter information related to another base station is included in the resource pool information in V2X-SIB, and may be a method suitable for the scenario of FIG. 5D. For a more detailed setting method for Alt-2, refer to Example 2 to be described later. Alt-3 is a method of fixing the setting information for S-SSB or PSCCH / PSSCH / PSFCH of another terminal as a default, and is basically a method in which flexible parameter setting of V2X terminals does not consider support. For more detailed setting method for Alt-3, refer to Example 3 to be described later. Alt-4 is a method of indicating the PSCCH, PSSCH, and PSFCH of other terminals in the PSBCH, and the detailed method for setting the Alt-4 is described in Example 4 to be described later. Alt-5 is a method for instructing by including configuration information for PSCCH, PSSCH, and PSFCH of another terminal in SCI. For a more detailed configuration method for Alt-5, refer to Embodiment 5 to be described later.

FIG. 6 is a diagram illustrating terminal operations according to the proposed embodiments in the V2X scenario of FIGS. 5A to 5D. According to the V2X scenarios of FIGS. 5A to 5D, the applicability of the proposed embodiments may be different.

According to FIG. 6, the terminal determines whether it is within base station coverage (610).

-Whether or not the terminal is within the base station coverage may be performed in a synchronization process through SSB detection transmitted by the base station.

* If the terminal is within the base station coverage, the terminal reads the V2X-SIB transmitted by its base station and receives the TX / RX resource pool configuration for communication with other terminals (620).

-Thereafter, the UE determines whether to synchronize additional synchronization with the other UE before receiving the signal of the other UE from the V2X-SIB information transmitted by its base station (630).

** Whether additional synchronization procedure is required or not can be determined according to whether or not a field for parameter information related to another base station is included in the corresponding resource pool information in V2X-SIB.

-If additional synchronization is required, the UE performs a synchronization procedure with other UEs before receiving the PSCCH / PSSCH.

** The terminal performs synchronization with the other terminal by one or a combination of Alt-1 / Alt-2 / Alt-3 (640).

*** When Alt-1 is applied, the UE performs synchronization using SS-SSB parameters and configuration information set in resource pool information in V2X-SIB.

*** When Alt-2 is applied, the UE performs synchronization using SS-SSB parameters and configuration information set in a field containing parameter information related to another base station among resource pool information in V2X-SIB.

*** When Alt-3 is applied, the terminal performs synchronization using preset SS-SSB parameters and setting information.

** The terminal receives the PSCCH transmitted by the other terminal with information by one or a combination of Alt-1 / Alt-2 / Alt-3 / Alt-4 / Alt-5 (641).

*** When Alt-1 is applied, the UE performs synchronization using PSCCH parameters and configuration information set in resource pool information in V2X-SIB or receives PSCCH.

*** When Alt-2 is applied, the UE performs synchronization or receives a PSCCH by using PSCCH parameters and configuration information set in a field containing parameter information related to another base station among resource pool information in V2X-SIB.

*** When Alt-3 is applied, the terminal performs synchronization using a preset PSCCH parameter and setting information or receives a PSCCH.

*** When Alt-4 is applied, the terminal receives the PSCCH using the PSCCH parameter and setting information set in the PSBCH received through the S-SSB.

*** When Alt-5 is applied, the terminal receives the PSCCH using the PSCCH parameter and configuration information received through SCI.

** The terminal receives the PSSCH transmitted by the other terminal with information by one or a combination of Alt-1 / Alt-2 / Alt-3 / Alt-4 / Alt-5 (642).

*** When Alt-1 is applied, the UE performs synchronization using PSSCH parameters and configuration information set in resource pool information in V2X-SIB.

*** When Alt-2 is applied, the UE performs synchronization using a PSSCH parameter and configuration information set in a field containing parameter information related to another base station among resource pool information in V2X-SIB or receives a PSSCH.

*** When Alt-3 is applied, the UE performs synchronization using a preset PSSCH parameter and configuration information or receives a PSSCH.

*** When Alt-4 is applied, the UE receives PSCCH or PSSCH using PSSCH parameters and configuration information set in PSBCH received through S-SSB.

*** When Alt-5 is applied, the UE receives the PSSCH using the PSSCH parameter and configuration information received through SCI.

-If there is no need for additional synchronization, the UE immediately receives the PSCCH / PSSCH.

** The terminal receives the PSCCH transmitted by the other terminal as information by one or a combination of Alt-1 / Alt-3 / Alt-4 / Alt-5 (650).

*** When Alt-1 is applied, the UE performs synchronization using PSCCH parameters and configuration information set in resource pool information in V2X-SIB or receives PSCCH.

*** When Alt-3 is applied, the terminal performs synchronization using a preset PSCCH parameter and setting information or receives a PSCCH.

*** When Alt-4 is applied, the terminal receives the PSCCH using the PSCCH parameter and setting information set in the PSBCH received through the S-SSB.

*** When Alt-5 is applied, the terminal receives the PSCCH using the PSCCH parameter and configuration information received through SCI.

** The terminal receives the PSSCH transmitted by the other terminal with information by one or a combination of Alt-1 / Alt-3 / Alt-4 / Alt-5 (651).

*** When Alt-1 is applied, the UE performs synchronization or receives a PSSCH using PSSCH parameters and configuration information set in resource pool information in V2X-SIB.

*** When Alt-3 is applied, the UE performs synchronization using a preset PSSCH parameter and configuration information or receives a PSSCH.

*** When Alt-4 is applied, the UE receives PSCCH or PSSCH using PSSCH parameters and configuration information set in PSBCH received through S-SSB.

*** When Alt-5 is applied, the UE receives the PSSCH using the PSSCH parameter and configuration information received through SCI.

* If the terminal is not within base station coverage, the terminal acquires preset TX / RX resource pool information (660).

-The terminal performs synchronization with other terminals using S-SSB parameters and setting information preset by Alt-3 (661).

-The terminal receives the PSCCH transmitted by the other terminal as information by one or a combination of Alt-3 / Alt-4 / Alt-5 (662).

** When Alt-3 is applied, the terminal receives the PSCCH using preset PSCCH reception parameters and setting information.

** When Alt-4 is applied, the terminal receives the PSCCH using the PSCCH reception parameters and setting information set in the PSBCH received through the S-SSB.

** When Alt-5 is applied, the terminal receives the PSCCH using the PSCCH parameter and configuration information received through SCI.

-The terminal receives the PSSCH transmitted by the other terminal with information by one or a combination of Alt-3 / Alt-4 / Alt-5 (663).

** When Alt-3 is applied, the UE receives the PSSCH using preset PSSCH reception parameters and configuration information.

** When Alt-4 is applied, the UE receives the PSSCH using the PSSCH reception parameters and configuration information set in the PSBCH received through the S-SSB.

** When Alt-5 is applied, the UE receives the PSSCH using the PSSCH parameter and configuration information received through SCI.

In the present invention, some of the parameter information for the SSB may be the same as or different from the S-SSB transmission / reception parameter setting. In addition, some of the parameter information for the S-SSB may be the same as or different from the setting of the PSCCH / PSSCH transmission / reception parameter. Also, in the description of the present invention, communication between two terminals through a side link is described as a standard, but the proposed method can be applied to unicast, groupcast, and broadcast V2X communication as shown in FIG. 2 as well as communication between two terminals. . In FIG. 6, reception of S-SSB, PSCCH, and PSSCH signals through 640, 641, and 642 may be applied to the scenario of FIG. 5D. In FIG. 6, reception of PSCCH and PSSCH signals through 650 and 651 may be applied to the scenarios of FIGS. 5A and 5D. Finally, in FIG. 6, reception of S-SSB, PSCCH, and PSSCH signals through 661, 662, and 663 may be applied to the scenarios of FIGS. 5B and 5C.

<First Example>

In the first embodiment of the present invention, Alt-1 of the proposed method for parameter setting in the NR sidelink communication system will be described in more detail. Alt-1 is a method of setting reception parameter information for S-SSB, PSCCH, PSSCH, and PSFCH in resource pool information in V2X-SIB. As described above, the resource pool refers to time and frequency resources used in V2X for a vehicle terminal to exchange information using a side link with another vehicle terminal and a pedestrian portable terminal. When the concept of a bandwidth part (BWP) is introduced as in the NR base station-terminal system, a resource pool can be defined within a set BWP. The operation method of Alt-1 is described through Table 4 below. Table 4 shows TX / RX resource pool information set in the V2X SIB. Specifically, in Table 4, the SL-CommResourcePoolV2X field contains configuration information for the resource pool, and when the parameters set between the two terminals perform communication between terminals in different states, the following information includes the parameters set between terminals: And can be set. The related parameter information in the SL-CommResourcePoolV2X field may include at least one of the following.

* S-SSB-Tx

-Sub-carrier spacing (SCS), CP length, waveform (waveform), and time / frequency / code resources for S-SSB transmission of the terminal may be included.

* PSCCH-PSSCH-Tx

-Subcarrier spacing (SCS), CP length, waveform for the PSCCH and PSSCH transmission of the terminal, scrambling ID of the reference signal, DMRS / CSIRS pattern, and the like may be included.

-The information is divided into PSCCH-Tx and PSSCH-Tx, and may be separately set.

* PSFCH-Tx

-Information such as subcarrier spacing (SCS), CP length, and waveform for PSFCH transmission of the terminal may be included.

* S-SSB-Rx

-Subcarrier spacing (SCS), CP length, waveform, time / frequency / code resources, etc. for S-SSB reception of the terminal may be included.

* PSCCH-PSSCH-Rx

-Information such as subcarrier spacing (SCS), CP length, waveform, reference signal scrambling ID, DMRS / CSIRS pattern for PSCCH and PSSCH reception of the UE may be included.

-The above information is divided into PSCCH-Rx and PSSCH-Rx, and may be separately set.

* PSFCH-Rx

-Information such as subcarrier spacing (SCS), CP length, and waveform for PSFCH reception of the terminal may be included.

[Table 4]

In Table 4, configuration parameters in the SL-CommResourcePoolV2X field may be independently set for each Tx / Rx resource pool in SL-CommTxPoolListV2X and SL-CommRxPoolListV2X. Thereafter, the terminal may obtain parameter information set in the SL-CommResourcePoolV2X field in the V2X SIB in the following way.

* When parameters and configuration information for the S-SSB are applied through Alt-1, the terminal reads the V2X-SIB transmitted by its base station and acquires at least one of the following information.

-1) S-SSB transmission parameters and configuration information that the terminal can transmit (refer to S-SSB-Tx in Table 4)

-2) Receiving parameters and setting information of S-SSB that the terminal can receive from other terminals (refer to S-SSB-Rx in Table 4)

-If only 1) is obtained, the terminal transmits S-SSB and S-SSB using the parameters and setting information obtained in 1).

-If only 2) is obtained, the terminal transmits S-SSB and S-SSB using the parameters and setting information obtained in 2).

-When both 1) and 2) are acquired, S-SSB is transmitted using 1) and S-SSB is received using 2).

* When parameters and configuration information for PSCCH / PSSCH are applied through Alt-1, the terminal reads V2X-SIB transmitted by its base station and acquires at least one of the following information.

-1) PSCCH / PSSCH transmission parameters and configuration information that the UE can transmit (refer to PSCCH-PSSCH-Tx in Table 4)

-2) PSCCH / PSSCH reception parameters and configuration information that a UE can receive from another UE (refer to PSCCH-PSSCH-Rx in Table 4)

-If only 1) is obtained, the UE transmits PSCCH / PSSCH and PSCCH / PSSCH using the parameters and configuration information acquired in 1).

-If only 2) is obtained, the UE transmits PSCCH / PSSCH and PSCCH / PSSCH using the parameters and configuration information obtained in 2).

-When both 1) and 2) are obtained, PSCCH / PSSCH is transmitted using 1) and PSCCH / PSSCH is received using 2).

<Example 2>

In Embodiment 2 of the present invention, Alt-2 of the proposed method for parameter setting in the NR sidelink communication system will be described in more detail. Unlike Alt-1, Alt-2 is a method of setting reception parameter information for S-SSB, PSCCH, and PSSCH in a field containing parameter information related to other base stations among common resource pool information in V2X-SIB. Alt-2 is a method of setting reception parameter information for S-SSB, PSCCH, and PSSCH in a field containing parameter information related to another base station among resource pool information in V2X-SIB. When the concept of BWP is introduced as in the NR base station-terminal system, the resource pool can be defined within the established BWP. Unlike Alt-1, Alt-2 is a method that can be set only when the resource pool information includes fields for parameter information related to other base stations in V2X-SIB, and is a more suitable method for the scenario of FIG. 5D. The operation method of Alt-2 is explained through Table 5 below. Table 5 shows TX / RX resource pool information set in the V2X SIB. Specifically, in Table 4, the SL-CommResourcePoolV2X field contains configuration information for the resource pool, and the rxParametersNCell field is a field containing parameter information related to other base stations. Unlike Alt-1, the parameters set between the two terminals are different. In the case of performing terminal-to-terminal communication, the method of including and setting the information of the received parameter for the Rx resource pool in the rxParametersNCell field. The transmission parameter information for the Tx resource pool is set to be the same as Alt-1. Therefore, the related parameter information in the SL-CommResourcePoolV2X field for Alt-2 may include at least one of the following.

* S-SSB-Tx

-Sub-carrier spacing (SCS), CP length, waveform (waveform), and time / frequency / code resources for S-SSB transmission of the terminal may be included.

* PSCCH-PSSCH-Tx

-Subcarrier spacing (SCS), CP length, waveform for the PSCCH and PSSCH transmission of the terminal, scrambling ID of the reference signal, DMRS / CSIRS pattern, and the like may be included.

-The information is divided into PSCCH-Tx and PSSCH-Tx, and may be separately set.

* PSFCH-Tx

-Information such as subcarrier spacing (SCS), CP length, and waveform for PSFCH transmission of the terminal may be included.

* S-SSB-Rx

-Subcarrier spacing (SCS), CP length, waveform, time / frequency / code resources, etc. for S-SSB reception of the terminal may be included.

* PSCCH-PSSCH-Rx

-Information such as subcarrier spacing (SCS), CP length, waveform, reference signal scrambling ID, DMRS / CSIRS pattern for PSCCH and PSSCH reception of the UE may be included.

-The above information is divided into PSCCH-Rx and PSSCH-Rx, and may be separately set.

* PSFCH-Rx

-Information such as subcarrier spacing (SCS), CP length, and waveform for PSFCH reception of the terminal may be included.

[Table 5]

In Table 5, configuration parameters in the SL-CommResourcePoolV2X field may be independently set for each Tx / Rx resource pool in SL-CommTxPoolListV2X and SL-CommRxPoolListV2X. In addition, the rxParametersNCell field may be set only when an additional synchronization procedure is required as described in FIG. 5D. Thereafter, the terminal may obtain parameter information set in the SL-CommResourcePoolV2X field in the V2X SIB in the following way.

* When parameters and configuration information for the S-SSB are applied through Alt-2, the terminal reads the V2X-SIB transmitted by its base station and acquires at least one of the following information.

-1) S-SSB transmission parameters and configuration information that the terminal can transmit (refer to S-SSB-Tx in Table 5)

-2) Receiving parameters and setting information of S-SSB that the terminal can receive from other terminals (refer to S-SSB-Rx in Table 5)

-If only 1) is obtained, the terminal transmits S-SSB and S-SSB using the parameters and setting information obtained in 1).

-If only 2) is obtained, the terminal transmits S-SSB and S-SSB using the parameters and setting information obtained in 2).

-When both 1) and 2) are acquired, S-SSB is transmitted using 1) and S-SSB is received using 2).

* When parameters and configuration information for PSCCH / PSSCH are applied through Alt-2, the terminal reads the V2X-SIB transmitted by its base station and acquires at least one of the following information.

-1) PSCCH / PSSCH transmission parameters and configuration information that the UE can transmit (refer to PSCCH-PSSCH-Tx in Table 5)

-2) PSCCH / PSSCH reception parameters and configuration information that the UE can receive from other UEs (see PSCCH-PSSCH-Rx in Table 5)

-If only 1) is obtained, the UE transmits PSCCH / PSSCH and PSCCH / PSSCH using the parameters and configuration information acquired in 1).

-If only 2) is obtained, the UE transmits PSCCH / PSSCH and PSCCH / PSSCH using the parameters and configuration information obtained in 2).

-When both 1) and 2) are obtained, PSCCH / PSSCH is transmitted using 1) and PSCCH / PSSCH is received using 2).

In the case of Alt-2, unlike Alt-1, it is possible to set the reception parameter for the Rx resource pool only when the rxParametersNCell field is set.

<Example 3>

In Embodiment 3 of the present invention, Alt-3 of the proposed method for parameter setting in the NR sidelink communication system will be described in more detail. Alt-3 is a method in which the setting information for the S-SSB or PSCCH / PSSCH of another terminal is fixed as a default value, and basically, the flexible parameter setting of V2X terminals does not consider support. We suggest below which parameters may be desirable to be selected and fixed by Alt-3.

According to the above proposal, the S-SSB parameter and setting information of another terminal may include at least one of the following.

* Information on sub-carrier spacing (SCS), CP length, waveform, time / frequency / code resources for S-SSB

In addition, according to the above proposal, the PSCCH / PSSCH parameter and configuration information of the other terminal may include at least one of the following.

* Information such as subcarrier spacing (SCS), CP length, waveform, reference signal scrambling ID, DMRS / CSIRS pattern for PSCCH and PSSCH

Among the above parameters, it may be desirable to fix the following parameters with Alt-3 as follows.

* Subcarrier spacing (SCS)

-In FR1 (Frequency Range 1, that is, Low Frequency Range), 30 kHz is fixed to SCS and is selected.

-In FR2 (Frequency Range 2, High Frequency Range), 60 kHz is fixed to SCS and is selected.

-The SCS can be equally applied to SSB, S-SSB, PSCCH, and PSSCH.

* Waveform

-The waveform used in the V2X system is fixed by CP-OFDM.

Among the proposed methods, first, the background in which the subcarrier spacing is fixed as described above will be described. First, {15, 30, 60} kHz is considered as SCS in the low frequency range (FR1) in the NR sidelink communication system, and {60, 120} kHz is considered as SCS in the high frequency range (FR2). As described above, the subcarrier interval corresponding to 15 kHz may be inappropriate to support channel estimation in time for a high-speed terminal in the V2X system considering up to 500 km / h. Therefore, for this reason, it may be desirable to operate at a fixed frequency of 30 kHz in low frequency range (FR1) and to 60 kHz in FR2 when high frequency range (FR2) is also supported. Also, in the case of waveforms, DFT in LTE V2X system is not the environment where communication between terminals in the V2X system is as important as coverage in the uplink between the terminals and base stations, and accordingly, PAPR (Peak to Average Power Ratio) is not important. Unlike using -S-OFDM, it may be desirable to operate fixedly with CP-OFDM in the NR V2X system. When using CP-OFDM, when CSI-RS for V2X is introduced, it is possible to recycle the CSI-RS pattern introduced between NR base station-terminals. Since CSI-RS can be used to improve performance through channel information feedback in a unicast or groupcast environment, it may be desirable to signal pattern information or periodic information of CSI-RS through Sidelink Control Information (SCI). SCI means control information transmitted through PSCCH.

<Example 4>

In Embodiment 4 of the present invention, Alt-4 of the proposed method for parameter setting in the NR sidelink communication system will be described in more detail. Alt-4 is a method of indicating the PSCCH / PSSCH configuration information of another terminal in the PSBCH. The operation method of Alt-4 is explained through Table 6 below. Table 6 shows information that can be included in the PSBCH, and when the parameters set between the two terminals perform communication between the terminals in different states, the information of the parameters set between the terminals may be included and set as follows. The related parameter information that may be included in the PSBCH by Alt-4 may include at least one of the following.

* PSCCH-PSSCH-Tx

-Information such as SCS, CP length, waveform, reference signal scrambling ID, DMRS / CSIRS pattern for PSCCH and PSSCH transmission of the UE may be included.

-The information is divided into PSCCH-Tx and PSSCH-Tx, and may be separately set.

* PSCCH-PSSCH-Rx

-Information such as SCS, CP length, waveform, reference signal scrambling ID, DMRS / CSIRS pattern for PSCCH and PSSCH reception of the UE may be included.

-The above information is divided into PSCCH-Rx and PSSCH-Rx, and may be separately set.

[Table 6]

In Table 6, the number of bits A and B for PSCCH-PSSCH-Tx and PSCCH-PSSCH-Rx included for configuration information for PSCCH / PSSCH may be changed by parameters included in each. An example of setting the relevant number of bits is given below. Thereafter, the terminal may acquire information set in the PSBCH in the following manner.

* When Alt-4 is applied, the terminal decodes the PSBCH to obtain at least one of the following information.

-1) PSCCH / PSSCH transmission parameters and configuration information that the terminal can transmit

-2) PSCCH / PSSCH reception parameters and configuration information that a terminal can receive from another terminal

-If only 1) is obtained, the UE transmits PSCCH / PSSCH and PSCCH / PSSCH using the parameters and configuration information acquired in 1).

-If only 2) is obtained, the UE transmits PSCCH / PSSCH and PSCCH / PSSCH using the parameters and configuration information obtained in 2).

-When both 1) and 2) are obtained, PSCCH / PSSCH is transmitted using 1) and PSCCH / PSSCH is received using 2).

7 illustrates an example of a demodulation reference signal (DMRS) pattern for a physical downlink shared channel (PDSCH) in connection with configuration information according to an embodiment of the present disclosure.

When DMRS pattern information for PDSCH is included in Table 6, a pattern set with 4 symbols for high-speed environment support and a pattern set with 2 symbols set for low-speed environment support are defined as shown in FIG. 7 and the pattern information for this is set to 1 bit. It can be set and included as PSBCH information. 7 (a) is an example 710 for a four-symbol pattern, and FIG. 7 (b) is an example 720 for a two-symbol pattern. The position of the set pattern is not limited to the example of FIG. 7.

<Example 5>

In Embodiment 5 of the present invention, Alt-5 of the proposed method for parameter setting in the NR sidelink communication system will be described in more detail. Alt-5 is a method of setting reception parameter information for S-SSB, PSCCH, PSSCH, and PSFCH in a specific field of SCI transmitted between terminals. The related parameter information that may be included in the SCI by Alt-5 may include at least one of the following. As described above, the parameter information included in the SCI according to the fifth embodiment may be the same as or different from the parameters obtained by the terminal according to the first to fourth embodiments described above.

* PSCCH-PSSCH-Tx

-Subcarrier spacing (SCS), CP length, waveform for the PSCCH and PSSCH transmission of the terminal, scrambling ID of the reference signal, DMRS / CSIRS pattern, and the like may be included.

-The information is divided into PSCCH-Tx and PSSCH-Tx, and may be separately set as separate fields.

* PSFCH-Tx

-Information such as subcarrier spacing (SCS), CP length, and waveform for PSFCH transmission of the terminal may be included.

* PSCCH-PSSCH-Rx

-Information such as subcarrier spacing (SCS), CP length, waveform, reference signal scrambling ID, DMRS / CSIRS pattern for PSCCH and PSSCH reception of the UE may be included.

-The information is divided into PSCCH-Rx and PSSCH-Rx, and may be separately set as separate fields.

* PSFCH-Rx

-Information such as subcarrier spacing (SCS), CP length, and waveform for PSFCH reception of the terminal may be included.

When Alt-5 is applied, the terminal decodes the SCI to obtain at least one of the following information.

-1) PSCCH / PSSCH transmission parameters and configuration information that the terminal can transmit

-2) PSCCH / PSSCH reception parameters and configuration information that a terminal can receive from another terminal

-If only 1) is obtained, the UE transmits PSCCH / PSSCH and PSCCH / PSSCH using the parameters and configuration information acquired in 1).

-If only 2) is obtained, the UE transmits PSCCH / PSSCH and PSCCH / PSSCH using the parameters and configuration information obtained in 2).

-When both 1) and 2) are obtained, PSCCH / PSSCH is transmitted using 1) and PSCCH / PSSCH is received using 2).

<Example 6>

In the preceding Examples 1 to 5, the specific UE identifies parameter setting information for S-SSB, PSCCH, PSSCH, and PSFCH of other UEs, and the corresponding S-SSB, PSCCH, PSSCH, and PSFCH even when the setting information is different. It has been described how to receive. In the sixth embodiment of the present invention, a method is proposed in which the parameter setting information for S-SSB, PSCCH, PSSCH, and PSFCH between terminals is not expected to be received when they are different. Specifically, in the standard, it may be possible by specifying that the UE does not expect to receive S-SSB, PSCCH, PSSCH, and PSFCH having different configuration information. However, unlike the method proposed in Embodiments 1 to 5, this method may occur when a sidelink signal cannot be received in a specific scenario.

8 and 9, respectively, a transmitting unit, a receiving unit, and a processing unit of a terminal and a base station for performing the above embodiments of the present invention. In the first to sixth embodiments, a method of setting a parameter and an operation of the terminal related to a case in which parameters set between two terminals perform communication between terminals in different states are described. Each terminal must operate according to the embodiment.

Specifically, FIG. 8 is a block diagram showing the internal structure of a terminal according to an embodiment of the present invention. As shown in FIG. 8, the terminal of the present invention may include a terminal receiving unit 800, a terminal transmitting unit 804, and a terminal processing unit 802. The terminal receiving unit 800 and the terminal may collectively refer to the transmitting unit 804 and may be referred to as a transceiver in an embodiment of the present invention. The transmitting and receiving unit may transmit and receive signals to and from a base station. The signal may include control information and data. To this end, the transmission / reception unit may include a radio frequency (RF) transmitter for up-converting and amplifying the frequency of the transmitted signal, an RF receiver for low-noise amplifying the received signal, and down-converting the frequency. In addition, the transmission / reception unit may receive a signal through a wireless channel, output the signal to the terminal processing unit 802, and transmit a signal output from the terminal processing unit 802 through the wireless channel. The terminal processing unit 802 may control a series of processes so that the terminal operates according to the above-described embodiment of the present invention.

9 is a block diagram showing the internal structure of a base station according to an embodiment of the present invention. 9, the base station of the present invention may include a base station receiver 901, a base station transmitter 905, and a base station processor 903. The base station reception unit 901 and the base station transmission unit 905 may be collectively referred to as a transmission / reception unit in an embodiment of the present invention. The transmitting and receiving unit may transmit and receive signals to and from the terminal. The signal may include control information and data. To this end, the transmission / reception unit may include an RF transmitter that up-converts and amplifies the frequency of the transmitted signal, an RF receiver that amplifies the received signal with low noise, and down-converts the frequency. In addition, the transmission / reception unit may receive a signal through a wireless channel, output the signal to the base station processing unit 903, and transmit a signal output from the terminal processing unit 903 through the wireless channel. The base station processing unit 903 may control a series of processes so that the base station operates according to the above-described embodiment of the present invention.

In the specific embodiments of the present invention described above, the components included in the invention are expressed in singular or plural according to the specific embodiments presented. However, the singular or plural expressions are appropriately selected for the situation presented for convenience of description, and the present invention is not limited to the singular or plural components, and even the components expressed in plural are composed of singular or singular Even the expressed components may be composed of a plurality.

On the other hand, in the detailed description of the present invention, although specific embodiments have been described, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the claims to be described later, but also by the scope and equivalents of the claims.

Claims (20)

In the method of communication of the V2X (vehicle to everything) of the first terminal in the wireless communication system,
Determining at least one parameter related to the neurology of a sidelink signal to be transmitted to the second terminal; And
And transmitting the sidelink signal to the second terminal based on the at least one parameter. According to claim 1,
The at least one parameter is determined based on resource pool information of the V2X system information block (SIB) received from the base station, or based on information included in a field related to another base station among the resource pool information of the V2X SIB or , It is determined according to a predetermined value, is determined based on information contained in the PSBCH (physical sidelink broadcast channel), or is determined based on information contained in the sidelink control information (SCI). According to claim 2,
The sidelink signal is a method comprising at least one of a sidelink synchronization signal block (S-SSB), a physical sidelink shared channel (PSSCH), a physical sidelink control channel (PSCCH), and a physical sidelink feedback channel (PSFCH). According to claim 3,
The at least one parameter includes at least one of subcarrier spacing (SCS), cyclic prefix (CP) length, and waveform for transmitting the sidelink signal. The method of claim 4,
The first terminal is a transmitting terminal of the sidelink, and the second terminal is a receiving terminal of the sidelink. In the first terminal set to perform vehicle to everything (V2X) communication in a wireless communication system,
A transceiver configured to transmit and receive signals; And
And a control unit configured to determine at least one parameter related to the neurology of a sidelink signal to be transmitted to the second terminal, and to transmit the sidelink signal to the second terminal based on the at least one parameter. , The first terminal. The method of claim 6,
The at least one parameter is determined based on resource pool information of the V2X system information block (SIB) received from the base station, or based on information included in a field related to another base station among the resource pool information of the V2X SIB or , It is determined according to a predetermined value, is determined based on information contained in the PSBCH (physical sidelink broadcast channel), or is determined based on information contained in the sidelink control information (SCI), the first terminal. The method of claim 7,
The sidelink signal includes at least one of a sidelink synchronization signal block (S-SSB), a physical sidelink shared channel (PSSCH), a physical sidelink control channel (PSCCH), and a physical sidelink feedback channel (PSFCH). . The method of claim 8,
The at least one parameter includes at least one of a subcarrier spacing (SCS), a cyclic prefix (CP) length, and a waveform for transmitting the sidelink signal. The method of claim 9,
The first terminal is a transmitting terminal of the sidelink, and the second terminal is a receiving terminal of the sidelink. In the method of communication of the V2X (vehicle to everything) of the second terminal in the wireless communication system,
Determining at least one parameter related to the neurology of a sidelink signal to be received from the first terminal; And
And receiving the sidelink signal from the first terminal based on the at least one parameter. The method of claim 11,
The at least one parameter is determined based on resource pool information of the V2X system information block (SIB) received from the base station, or based on information included in a field related to another base station among the resource pool information of the V2X SIB or , It is determined according to a predetermined value, is determined based on information contained in the PSBCH (physical sidelink broadcast channel), or is determined based on information contained in the sidelink control information (SCI). The method of claim 12,
The sidelink signal is a method comprising at least one of a sidelink synchronization signal block (S-SSB), a physical sidelink shared channel (PSSCH), a physical sidelink control channel (PSCCH), and a physical sidelink feedback channel (PSFCH). The method of claim 13,
The at least one parameter includes at least one of subcarrier spacing (SCS), cyclic prefix (CP) length, and waveform for receiving the sidelink signal. The method of claim 14,
The first terminal is a transmitting terminal of the sidelink, and the second terminal is a receiving terminal of the sidelink. In the second terminal is set to perform V2X (vehicle to everything) communication in the wireless communication system,
A transceiver configured to transmit and receive signals; And
And a controller configured to determine at least one parameter related to the neurology of a sidelink signal to be received from the first terminal, and to receive the sidelink signal from the first terminal based on the at least one parameter. The second terminal. The method of claim 16,
The at least one parameter is determined based on resource pool information of the V2X system information block (SIB) received from the base station, or based on information included in a field related to another base station among the resource pool information of the V2X SIB or , It is determined according to a predetermined value, is determined based on information contained in the PSBCH (physical sidelink broadcast channel), or is determined based on information included in the sidelink control information (SCI), the second terminal. The method of claim 17,
The sidelink signal includes at least one of a sidelink synchronization signal block (S-SSB), a physical sidelink shared channel (PSSCH), a physical sidelink control channel (PSCCH), and a physical sidelink feedback channel (PSFCH). . The method of claim 18,
The at least one parameter includes at least one of a subcarrier spacing (SCS), a cyclic prefix (CP) length, and a waveform for receiving the sidelink signal. The method of claim 19,
The first terminal is a transmitting terminal of the sidelink, and the second terminal is a receiving terminal of the sidelink.

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