KR20200099908A - Method and apparatus for performing communication using bwp in wireless communincation system - Google Patents

Abstract

The present invention may provide a method of performing communication based on a bandwidth part (BWP) in a new radio (NR) vehicle to everything (V2X) system. According to the present invention, the method of performing communication may comprise the steps of: receiving SL initial BWP configuration information for initial cell access of a Uu link; receiving SL BWP configuration information for V2X communication; and performing initial cell access.

Description

Method and device for performing communication using BWP in wireless communication system {METHOD AND APPARATUS FOR PERFORMING COMMUNICATION USING BWP IN WIRELESS COMMUNINCATION SYSTEM}

The present invention can provide a method and apparatus for operating a BandWidth Part (BWP) in a wireless communication system. Specifically, the present invention can provide a method and apparatus for operating a BWP in NR (New Radio) vehicle-to-vehicle communication (V2X, Vehicle To Everything).

ITU (International Telecommunication Union) is developing IMT (International Mobile Telecommunication) framework and standards, and recently, a discussion for 5G (5G) communication is underway through a program called "IMT for 2020 and beyond". .

In order to meet the requirements presented in "IMT for 2020 and beyond", the 3GPP (3rd Generation Partnership Project) NR (New Radio) system takes into account various scenarios, service requirements, potential system compatibility, etc. It is being discussed in the direction of supporting various numerology on the basis of resource units.

In addition, V2X communication refers to a communication method in which information such as traffic conditions is exchanged or shared while communicating with road infrastructure and other vehicles while driving. V2X is V2V (vehicle-to-vehicle), which means LTE (Long Term Evolution)-based communication between vehicles, V2P (vehicle-to-pedestrian), which means LTE-based communication between a vehicle and a terminal carried by an individual It may include a vehicle-to-infrastructure/network (V2I/N) that means LTE-based communication between the and roadside units/networks. Here, the roadside unit (RSU) may be a transport infrastructure entity implemented by a base station or a fixed terminal. For example, it may be an entity that transmits a speed notification to the vehicle.

The present invention can provide a method and apparatus for operating a BWP in vehicle-to-vehicle communication.

The present invention can provide a method and apparatus for performing initial cell access in consideration of communication between vehicles.

The present invention may provide a method of performing communication based on BWP in an NR V2X system. At this time, the method of performing communication may include receiving SL initial BWP configuration information for initial cell access of the Uu link, receiving SL BWP configuration information for V2X communication, and performing initial cell access. have.

According to the present disclosure, it is possible to provide a method and apparatus for operating a BWP in vehicle-to-vehicle communication.

According to the present disclosure, it is possible to provide a method and apparatus for performing initial cell access in consideration of communication between vehicles.

1 is a diagram showing a frame structure for downlink/uplink transmission to which the present disclosure can be applied.
2 is a diagram illustrating a resource grid and a resource block to which the present disclosure can be applied.
3 is a diagram showing a system architecture according to an embodiment of the present invention.
4 is a diagram illustrating a scenario in which NR V2X sidelink communication is performed in a 3GPP network according to an embodiment of the present invention.
5 is a diagram showing a collision between a sidelink BWP and an initial BWP.
6 is a diagram showing an NR Uu BWP operation based on Option 1.
7 is a diagram showing an NR Uu BWP operation based on Option 2.
8 is a flowchart of an option 1 method that can be applied in the present invention.
9 is a flowchart of an option 2 method applicable to the present invention.
10 is a diagram showing the configuration of a base station device and a terminal device according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the embodiments. However, the present disclosure may be implemented in various different forms and is not limited to the embodiments described herein.

In describing an embodiment of the present disclosure, when it is determined that a detailed description of a known configuration or function may obscure the subject matter of the present disclosure, a detailed description thereof will be omitted. In addition, parts not related to the description of the present disclosure in the drawings are omitted, and similar reference numerals are attached to similar parts.

In the present disclosure, when a component is said to be "connected", "coupled" or "connected" with another component, it is not only a direct connection relationship, but an indirect connection relationship in which another component exists in the middle. It can also include. In addition, when a certain component "includes" or "have" another component, it means that other components may be further included rather than excluding other components unless otherwise stated. .

In the present disclosure, terms such as first and second are used only for the purpose of distinguishing one component from other components, and do not limit the order or importance of the components unless otherwise stated. Accordingly, within the scope of the present disclosure, a first component in one embodiment may be referred to as a second component in another embodiment, and similarly, a second component in one embodiment is a first component in another embodiment. It can also be called.

In the present disclosure, components that are distinguished from each other are intended to clearly describe each feature, and do not necessarily mean that the components are separated. That is, a plurality of components may be integrated to be formed in one hardware or software unit, or one component may be distributed in a plurality of hardware or software units. Therefore, even if not stated otherwise, such integrated or distributed embodiments are also included in the scope of the present disclosure.

In the present disclosure, components described in various embodiments do not necessarily mean essential components, and some may be optional components. Accordingly, an embodiment consisting of a subset of components described in an embodiment is also included in the scope of the present disclosure. In addition, embodiments including other elements in addition to the elements described in the various embodiments are included in the scope of the present disclosure.

In addition, this specification describes a wireless communication network, and the work performed in the wireless communication network is performed in the process of controlling the network and transmitting data in a system (for example, a base station) that governs the wireless communication network, or The work can be done at a terminal coupled to the network.

That is, it is apparent that various operations performed for communication with a terminal in a network comprising a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station. 'Base Station (BS)' may be replaced by terms such as a fixed station, Node B, eNode B (eNB), and access point (AP). In addition,'terminal' will be replaced by terms such as UE (User Equipment), MS (Mobile Station), MSS (Mobile Subscriber Station), SS (Subscriber Station), and non-AP STA. I can.

In the present disclosure, transmitting or receiving a channel includes the meaning of transmitting or receiving information or signals through the corresponding channel. For example, transmitting the control channel means transmitting control information or signals through the control channel. Similarly, transmitting a data channel means transmitting data information or signals through the data channel.

In the following description, the term NR system is used for the purpose of distinguishing a system to which various examples of the present disclosure are applied from an existing system, but the scope of the present disclosure is not limited by such terms. In addition, the term NR system in this specification is used as an example of a wireless communication system capable of supporting various subcarrier spacing (SCS), but the term NR system itself refers to a wireless communication system supporting a plurality of SCSs. It is not limited.

1 is a diagram showing an NR frame structure and a numerology according to an embodiment of the present invention.

일 수 있다. 이때,

이고,

일 수 있다. 또한,

는 NR 시간 단위와 LTE 시간 단위와의 배수 관계에 대한 상수일 수 있다. 참조 시간 단위로써 LTE에서는

,

및

가 정의될 수 있다.The basic unit of time domain in NR is

Can be At this time,

ego,

Can be Also,

May be a constant for a multiple relationship between the NR time unit and the LTE time unit. As a reference time unit, in LTE

,

And

Can be defined.

Frame structure

를 가질 수 있다. 이때, 하나의 프레임은

시간에 해당하는 10개의 서브프레임으로 구성된다. 서브프레임마다 연속적인 OFDM 심볼의 수는

일 수 있다. 또한, 각 프레임은 2개의 하프 프레임(half frame)으로 나누어지며, 하프 프레임은 0~4 서브프레임과 5~9 서브프레임으로 구성될 수 있다. 이때, 하프 프레임 1 (half frame 1)은 0~4 서브 프레임으로 구성되고, 하프 프레임 2 (half frame 2)는 5~9 서브 프레임으로 구성될 수 있다.Referring to FIG. 1, a time structure of a frame for downlink and uplink (Downlink/Uplink, DL/UL) transmission is

Can have At this time, one frame

It consists of 10 subframes corresponding to time. The number of consecutive OFDM symbols per subframe is

Can be In addition, each frame is divided into two half frames, and the half frame may be composed of 0 to 4 subframes and 5 to 9 subframes. In this case, half frame 1 may be composed of 0 to 4 sub-frames, and half frame 2 may be composed of 5 to 9 sub-frames.

In this case, the transmission timing of the uplink transmission frame i is determined based on Equation 1 below based on the downlink reception timing in the terminal.

은 듀플렉스 모드 (duplex mode) 차이 등으로 발생하는 TA 오프셋 (TA offset) 값일 수 있다. 기본적으로 FDD (Frequency Division Duplex)에서

은 0을 가지지만 TDD (Time Division Duplex)에서는 DL-UL 스위칭 시간에 대한 마진을 고려해서

고정된 값으로 정의될 수 있다.In Equation 1 below

May be a TA offset value caused by a difference in duplex mode or the like. Basically in FDD (Frequency Division Duplex)

Has 0, but in TDD (Time Division Duplex), considering the margin for the DL-UL switching time

It can be defined as a fixed value.

[Equation 1]

2 is a diagram illustrating a resource grid and a resource block.

Referring to FIG. 2, a resource element in a resource grid may be indexed according to subcarrier spacing. In this case, one resource grid may be generated for each antenna port and for each subcarrier spacing. Uplink and downlink transmission and reception may be performed based on the corresponding resource grid.

)를 구성할 수 있다. 자원 블록에 대한 인덱스는 특정 주파수 대역 또는 시스템 대역폭 내에서 활용될 수 있다.One resource block is composed of 12 resource elements in the frequency domain, and an index for one resource block per 12 resource elements as shown in Equation 2 below (

) Can be configured. The index for the resource block may be utilized within a specific frequency band or system bandwidth.

[Equation 2]

Numerologies

Numerology can be configured in various ways to satisfy various services and requirements of the NR system. At this time, referring to Table 1 below, the numanology may be defined based on subcarrier spacing (SCS) used in an Orthogonal Frequency Division Multiplexing (OFDM) system, a CP length, and the number of OFDM symbols per slot. . The above-described values may be provided to the terminal through higher layer parameters DL-BWP-mu and DL-BWP-cp (DL) and UL-BWP-mu and UL-BWP-cp (UL).

가 2인 경우로서 서브캐리어 스페이싱이 60kHz인 경우에서 노말 CP 및 확장 CP(Extended CP)가 적용될 수 있으며, 다른 대역에서는 노말 CP만 적용될 수 있다.In addition, as an example, in Table 1 below

In the case where is 2 and subcarrier spacing is 60 kHz, normal CP and extended CP may be applied, and only normal CP may be applied in other bands.

[Table 1]

In this case, a normal slot may be defined as a basic time unit used to transmit one piece of data and control information in the NR system. The length of the normal slot may basically consist of the number of 14 OFDM symbols. Also, unlike a slot, a subframe has an absolute time length of 1 ms in the NR system and can be used as a reference time for the length of another time period. In this case, for coexistence or backward compatibility between LTE and NR systems, a time interval such as an LTE subframe may be required in the NR standard.

For example, in LTE, data may be transmitted based on a transmission time interval (TTI) that is a unit time, and the TTI may be configured in units of one or more subframes. In this case, even in LTE, one subframe may be set to 1 ms, and 14 OFDM symbols (or 12 OFDM symbols) may be included.

In addition, a non-slot may be defined in NR. The non-slot may mean a slot having a number smaller than a normal slot by at least one symbol. For example, in the case of providing a low delay time such as an Ultra-Reliable and Low Latency Communications (URLLC) service, the delay time may be reduced through a non-slot having a number of symbols smaller than that of a normal slot. In this case, the number of OFDM symbols included in the nonslot may be determined in consideration of the frequency range. For example, in a frequency range of 6 GHz or higher, a non-slot having a length of 1 OFDM symbol may be considered. As another example, the number of OFDM symbols defining a nonslot may include at least two OFDM symbols. In this case, the range of the number of OFDM symbols included in the non-slot may be configured as a mini-slot length up to a normal slot length -1. However, as a non-slot standard, the number of OFDM symbols may be limited to 2, 4, or 7 symbols, but is not limited to the above-described embodiment.

가 1 및 2에 해당하는 서브캐리어 스페이싱이 사용되고, 6GHz 초과의 비면허 대역에서는

가 3 및 4에 해당하는 서브캐리어 스페이싱이 사용될 수 있다. 이때, 일 예로,

가 4인 경우는 후술할 SSB(Synchronization Siganl Block) 전용으로만 사용될 수 있으며, 상술한 실시예로 한정되지 않는다.In addition, as an example, in the unlicensed band below 6GHz

Subcarrier spacing corresponding to 1 and 2 is used, and in unlicensed bands above 6 GHz

Subcarrier spacing corresponding to 3 and 4 may be used. At this time, for example,

When is 4, it may be used only for a Synchronization Siganl Block (SSB) to be described later, and is not limited to the above-described embodiment.

슬롯 당 OFDM 심볼의 수

를 나타낸다. 표 2는 표 1에서 제공하는 바와 같이 각 서브캐리어 스페이싱 값에 따른 슬롯 당 OFDM 심볼의 수, 프레임 당 슬롯의 수 및 서브프레임 당 슬롯의 수를 나타낸다. 이때, 표 2에서는 14개의 OFDM 심볼을 갖는 노멀슬롯을 기준으로 상술한 값들을 나타낸다.In addition, Table 2 shows for each subcarrier spacing setting in the case of normal CP.

Number of OFDM symbols per slot

Represents. Table 2 shows the number of OFDM symbols per slot, the number of slots per frame, and the number of slots per subframe according to each subcarrier spacing value, as provided in Table 1. In this case, Table 2 shows the above-described values based on a normal slot having 14 OFDM symbols.

[Table 2]

가 2인 경우로서 서브캐리어 스페이싱이 60kHz일 때 확장 CP가 적용될 수 있다. 표 3은 확장 CP인 경우로서

슬랏 당 OFDM 심볼의 수

는 12인 노말슬롯을 기준으로 각각의 값을 나타낼 수 있다. 이때, 표 3을 참조하면, 60kHz 서브케리어 스페이싱을 따르는 확장 CP인 경우, 슬랏 당 심볼의 수, 프레임 당 슬롯의 수 및 서브프레임당 슬롯의 수를 나타낼 수 있다.Also, as described above,

When is 2 and the subcarrier spacing is 60 kHz, the extended CP may be applied. Table 3 shows the case of extended CP

Number of OFDM symbols per slot

May represent each value based on a 12-person normal slot. In this case, referring to Table 3, in the case of an extended CP following 60 kHz subcarrier spacing, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe may be indicated.

[Table 3]

Next, the structure of the SSB/PBCH (Physical Broadcast Channel) in the NR system and the initial cell access procedure in the NR system will be described.

At this time, the NR base station (i.e. gNB) may periodically transmit signals and channels as shown in Table 4 to the terminals in order to allow initial cell selection of the terminals (i.e. UEs) in the cell.

[Table 4]

For example, the SS/PBCH block may be the above-described SSB. In this case, even in the NR system, in order for the terminal to perform the initial wireless access, it may be necessary to receive a synchronization signal transmitted from the wireless access system and a broadcast channel transmitting important system information. To this end, the UE may check the reception sensitivity of a synchronization signal to find an optimal cell in the best channel environment. The terminal may perform a frequency/time synchronization and cell identification operation for initial access to an optimal channel among one or more channels in a specific frequency band operated based on the checked reception sensitivity. The UE can check the boundary of the OFDM symbol timing through the above-described operation, and then can start PBCH decoding in the same SSB.

In this case, the UE may perform PBCH decoding by receiving a PBCH Demodulation Reference Signal (DMRS). In addition, the terminal may acquire 3 LSB bit information among the SSB index information bits through the PBCH DMRS. Thereafter, the UE may perform PBCH decoding to obtain information included in the PBCH payload. Thereafter, the UE may perform a decoding procedure of SIB 1 using the information acquired through the PBCH.

For example, in the NR system, the UE may receive Remaining System Information (RMSI) as system information not transmitted on the PBCH through a broadcast signal or a channel. In addition, the terminal may receive Other System Information (OSI) and Paging Channel as other additional system information through a broadcast signal or channel.

Thereafter, the terminal may perform access to the base station through a random access channel (RACH) procedure, and then perform mobility management.

In addition, as an example, when a terminal receives an SSB, there is a need to configure an SSB composition and an SS Burst Set composition.

NR V2X service

With regard to the V2X service, the existing V2X service (e.g. LTE Rel-14 V2X) was able to support a set of basic requirements for V2X services. At this time, the requirements were basically designed in full consideration of road safety service. Therefore, V2X UEs (User Equipment) can exchange self-state information through sidelinks, and can exchange the above-described information with infrastructure nodes and/or pedestrians. Became possible.

Meanwhile, in a more advanced service (eg LTE Rel-15) as a V2X service, carrier aggregation, high order modulation, latency reduction, and transmission diversity (Tx) in the sidelink diversity) and the feasibility of sTTI, and introduced new features. Coexistence (same resource pool) with V2X UEs was requested based on the above, and the above-described services were provided based on LTE.

As an example, as SA (System Aspect) 1, technical features may be classified based on four categories as shown in Table 5 below in consideration of use cases for supporting new V2X services. In this case, vehicle plating in Table 5 below may be a technology in which a plurality of vehicles dynamically form a group and operate similarly. In addition, extended sensors may be a technology for collecting and exchanging data acquired from sensors or video images. In addition, advanced driving may be a technology in which a vehicle is driven based on fully automated or semi-automated. In addition, remote driving may be a technology that provides a technology and an application for remote control of a vehicle, and more detailed information about the above may be given in Table 5 below.

[Table 5]

In addition, SA1 described above is an eV2X (enhanced V2X) support technology for supporting a new V2X service, and both LTE and NR may be considered. For example, the NR V2X system may be a first V2X system. In addition, the LTE V2X system may be a second V2X system. That is, the NR V2X system and the LTE V2X system may be different V2X systems. Hereinafter, related contents will be described based on a method for satisfying the low delay and high reliability required in the NR sidelink based on the NR V2X system. However, the same or similar configuration may be extended and applied to the LTE V2X system, and is not limited to the following embodiments. That is, the LTE V2X system may also be applied to a part capable of mutual operation, and is not limited to the following embodiments. At this time, as an example, NR V2X capability may not necessarily be limited to support only V2X services, and what V2X RaT to use may be selected.

NR Sidelink

For the NR V2X service described above, an NR sidelink can be used. At this time, as an example, the NR sidelink frequency may consider FR1, which is a frequency below 6GHz, and FR2, which is a frequency exceeding 6GH (i.e. up to 52.6GHz). In addition, as an example, as an NR sidelink frequency, both unlicensed ITS bands and licensed bands may be considered. That is, as described above, a common design method for supporting each frequency band band may be required. To this end, it may be necessary to design an NR sidelink in consideration of an NR system. As an example, as in the NR standard design, even if it is actually an omni-directional Tx/Rx that is not beam-based, an NR sidelink design capable of supporting beam-based transmission and reception may be required, and is not limited to the above. .

Also, as an example, a physical channel for an NR V2X sidelink may be configured. For example, the NR PSSCH (Physical Sidelink Shared Channel) is a physical channel and may be a data channel for the NR sidelink. In addition, as an example, the NR PSCCH (Physical Sidelink Control Channel) is a physical channel and may be a control channel for the NR sidelink. In this case, scheduling information and other control information for the data channel of the NR sidelink may be transmitted through the NR PSCCH. As an example, Sidelink Control Information (SCI) is a format defining fields for control information related to scheduling of an NR sidelink data channel, and control information transmitted through the NR PSCCH may be transmitted based on the SCI format.

In addition, as an example, an NR PSFCH (Physical Sidelink Feedback Channel) may be defined. In this case, the NR PSFCH is a physical channel and may be an NR HARQ feedback channel. At this time, HARQ-ACK feedback information corresponding to the NR sidelink data channel, Channel Status Information (CSI), and other information may be transmitted through the NR PSFCH. More specifically, Sidelink Feedback Control Information (SFCI) including feedback information may be delivered through an NR PSFCH channel. At this time, SFCI is HARQ-ACK, CQI (Channel Quality Information), PMI (Precoding Matrix Indicator), RI (Rank Indicator), RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), pathgain/pathloss, SRI ( Scheduling Request Indicator), CRI (Contention Resolution Identity), interference condition, and vehicle motion information may include at least one or more, and is not limited to the above-described embodiment. In this case, as an example, the NR PSFCH will be described in more detail below.

NR V2X QoS requirement

The requirements of NR V2X QoS may be higher than the requirements of the existing V2X (e.g. LTE V2X) in consideration of the service for Table 5 described above. For example, based on Table 6 below, the delay may be set within 3 ms to 100 ms. Also, Reliability may be set within 90% to 99.999%. In addition, a data rate may also be required up to 1 Gbps.

[Table 6]

That is, as described above, in consideration of the V2X service, QoS requirements that can satisfy low latency and high reliability may be required. At this time, for example, in order to satisfy the above-described QoS requirements, AS level QoS management may be required. In addition, as an example, in order to satisfy the above-described QoS requirements, information on HARQ and CSI may be required in consideration of link adaptation. In addition, as an example, each of the NR V2X terminals may have different maximum bandwidth capabilities (max. BW capability). That is, in consideration of the above, there is a need for AS level information to be exchanged between terminals. As an example, the AS level information may include at least one or more of UE capability, QoS related information, radio bearer configuration, and physical layer configuration. . In addition, as an example, the AS level information may further include other information, and is not limited to the above-described embodiment.

Table 7 below may be each term applied in the following invention, but is not limited to the above-described embodiments.

[Table 7]

NR side link design

In the following, an NR V2X sidelink design method that satisfies the requirements for the above-described advanced V2X (i.e. eV2X) services will be described.

In more detail, a synchronization procedure and method required for forming a radio link for an NR sidelink will be described in detail. As an example, in the NR sidelink design, as described above, FR1 and FR2 (ie up to 52.6 GHz) and unlicensed ITS bands and licensed bands ITS as NR sidelink frequencies are the frequency bands in which the NR system is operated. And can be considered both as a range. In addition, as an example, the availability of the LTE (NG-eNB)/NR Uu link, which is the 3GPP NG-RAN network of Table 7 described above, may be considered in the NR sidelink design.

In addition, as an example, a design for eV2X synchronization information transmission and signal transmission and reception to satisfy higher requirements from the above-described advanced V2X services may be considered. At this time, the frequency for the NR V2X sidelink communication may be different from the existing system (e.g. LTE) at least one or more of the elements shown in Table 8 below based on technologies required in the new system. That is, as shown in Table 8 below, there is a need to satisfy new V2X service requirements by applying NR V2X sidelink based on NR radio access technologies, in particular, uplink transmission related technologies.

In addition, other factors may be considered in consideration of the new system as well as Table 8 below, and are not limited to the above-described embodiment.

[Table 8]

In addition, as an example, the physical channel, signal, basic slot structure, and physical resource of the NR V2X sidelink may be as shown in Table 9 below, as described above.

[Table 9]

In addition, as an example, FIG. 3 may be a basic network architecture configuration in consideration of an NR V2X sidelink.

As an example, referring to FIG. 3, nodes 310-1 and 310-2 and NG-RAN nodes 320-1, 320-2, 330-1, and 330-2 of 5GC (5G Core NW) NG interface can be set between. In addition, an Xn interface may be configured between the NG-RAN nodes 320-1, 320-2, 330-1, and 330-2. At this time, gNB (NR UP/CP protocol, 320-1, 320-2) and NG-eNB (E-UTRA UP/CP protocol, 330-1, 330-2) constituting the NG-RAN in the above-described architecture Centrally, the corresponding nodes can be interconnected through the Xn interface. In addition, as described above, the 5GC may be connected through an NG interface. In this case, as an example, in the above-described architecture, both the LTE sidelink terminal and the NR sidelink terminal may be controlled by NG-RAN (i.e. LTE Uu and NR Uu) based on the gNB and NG-eNB. Therefore, when the NR sidelink terminal transmits synchronization information, it may receive synchronization information from an LTE Uu or NR Uu link and transmit NR sidelink synchronization information (eg SL Synchronization Signal/SL Physical broadcast Channel) based on the information, It is not limited to the above-described embodiment. That is, the NR sidelink terminal may acquire synchronization information not only through the NR Uu link but also through the LTE Uu link.

Meanwhile, in relation to V2X sidelink communication, V2X sidelink terminals may perform V2X sidelink communication. However, in order for the V2X sidelink terminals to start communication, certain conditions need to be satisfied, and conditions for this may be as shown in Table 10 below. That is, the V2X sidelink terminal may perform V2X sidelink communication in the RRC idle state, inactive state, or connected mode. In addition, V2X sidelink terminals performing V2X sidelink communication need to be registered in a cell selected on a used frequency or belong to the same PLMN. In addition, when the V2X sidelink terminal is OOC on the frequency for V2X sidelink communication, V2X sidelink communication can be performed only when V2X sidelink communication can be performed based on pre-configuration information. .

[Table 10]

At this time, as described above, sidelink synchronization information may be required to start V2X sidelink communication. Therefore, the terminal needs to transmit sidelink synchronization information. However, the transmitting terminal (Sidelink Tx UE) may receive a configuration for transmitting sidelink synchronization information before transmitting the corresponding synchronization information. In this case, as an example, the transmitting terminal may receive a configuration for transmitting sidelink synchronization information based on a system information message or an RRC reconfiguration message (in the case of an RRC CONNECTED UE) broadcast from the above-described NG-RAN nodes. In addition, as an example, when the NR V2X sidelink terminal (hereinafter referred to as a terminal) does not exist in the NG-RAN network, sidelink synchronization information may be transmitted based on preset information, as described above.

Meanwhile, FIG. 4 may be an example of a scenario in which NR V2X sidelink communication is performed in a 3GPP network based on the above description. At this time, NR V2X sidelink communication may be performed on a 3GPP network (hereinafter, NG-RAN), and the presence of a GNSS signal may be additionally considered.

In more detail, referring to FIG. 4, each NR V2X sidelink terminal may be an IC or OOC based on the EUTRA NG-eNB 410. In addition, it may be the case of IC or OOC based on the gNB 420. In addition, it may be the case of IC or OOC based on the GNSS 430. In this case, in consideration of the above-described situation, NR V2X sidelink terminals may select a source of synchronization reference based on the location and capability of the terminal. In addition, as an example, in addition to the scenario shown in FIG. 6, scenarios shown in Table 11 may be considered, and are not limited to the above-described embodiment.

[Table 11]

Meanwhile, in the following, the NR SCS is any one of an SCS value for an NR DL SS/PBCH, an SCS value for an NR BWP (data/control channel), or a reference SCS value defined/set for comparison of an NR V2X SCS value I can. As another example, the NR SCS is defined for comparison of the SCS value for NR V2X SLSS/PSBCH, the SCS value for NR V2X BWP or resource pool (data/control channel), or NR V2X SCS value. / May be one of the set reference SCS values, and is not limited to the above-described embodiment. In addition, as an example, a 30kHz SCS value may be set and used as a default value for a 5.9GHz ITS spectrum. However, this is only an example and is not limited to the above-described embodiment.

When performing NR V2X sidelink communication, data transmission may be performed based on unicast/groupcast. In this case, as an example, unicast transmission may mean that one terminal transmits a message to another terminal. That is, it may mean one-to-one transmission. In addition, broadcast transmission may be a method of transmitting a message to all terminals regardless of whether or not the receiving terminal supports service. That is, one terminal can transmit a message regardless of whether a plurality of receiving terminals support the service. Meanwhile, the groupcast transmission method may be a method of sending a message to a plurality of terminals belonging to the group.

In this case, as an example, whether to activate the above-described unicast, groupcast, or broadcast data transmission and reception and whether to connect to a session may be determined in a higher layer. That is, the physical layer of the V2X terminal may operate based on the indication determined in the upper layer, but is not limited to the above-described embodiment.

In addition, as an example, the V2X terminal may perform corresponding transmission and reception after a session for transmitting the corresponding unicast or groupcast data is formed. When the V2X terminal performs transmission and reception based on the above-described session, the physical layer of the V2X terminal may know in advance physical layer parameter information for data transmission corresponding to unicast or groupcast. For example, the V2X terminal may recognize and receive the above-described information from the base station in advance. As another example, the above-described information may be information preset in the V2X terminal. At this time, as an example, unicast or multicast data transmission and reception may be applied when a small number of V2X terminals exist around a transmitting V2X terminal and a session is stably maintained. In addition, when the session is unstable or fluctuations to neighboring V2X terminals are large, data transmission may be performed mainly based on broadcast transmission. However, the above-described information is only an example and is not limited thereto.

In addition, as an example, as described above, unicast or groupcast transmission/reception may be determined at an application layer as an upper layer. In this case, as an example, data that can be allocated for transmission/reception created in an application layer may not be directly mapped to a radio layer. However, as an example, in the case of unicast or groupcast transmission and reception described above, a certain mapping relationship or connection establishment procedure may be required to perform data transmission and reception on the radio layer, but is not limited thereto.

In addition, as an example, in the case of unicast data transmission and reception, there is a need to establish sessions with each other by performing a procedure for discovering whether the corresponding transmission/reception terminals are adjacent to each other, and session establishment is performed based on various methods. I can. In this case, the session establishment between the terminal and the terminal may be performed with the help of the base station. The base station may collect location information of terminals and determine whether terminals capable of transmitting and receiving unicast or groupcast data are adjacent to each other. In this case, as an example, the base station may determine whether the terminals are adjacent based on the threshold value, and the determination for the threshold value may be an arbitrary value. When the base station determines that the terminals in the cell are adjacent to each other, the base station initializes a corresponding discovery procedure, and the terminals may perform the corresponding discovery procedure so that they can discover each other based on the initialization procedure. In addition, the base station may design a new discovery channel and periodically transmit and receive the corresponding channel to determine whether there is a V2X SL terminal in the vicinity. In addition, the base station may determine whether a neighboring terminal exists by transmitting and receiving a corresponding discovery message over a V2X data channel, and is not limited to the above-described embodiment. That is, session establishment for unicast or groupcast data transmission/reception may be completed based on the above-described procedures. Thereafter, the upper layer may inform the physical layer of information on session establishment and perform physical layer operations such as HARQ-ACK, CSI, and link adaptation.

In addition, in the NR system, the bandwidth part (hereinafter referred to as BWP) is considered. For example, when the terminal performs signal transmission and reception, it may not be necessary that the used frequency bandwidth is as wide as the serving cell bandwidth. In this case, as the partial bandwidth, the bandwidth may be configured as a bandwidth narrower than that of the serving cell. The frequency position of the above-described bandwidth may also be moved. In addition, the bandwidth of the OFDM subcarrier may also be changed. This may be defined as a subset of the total frequency bandwidth of the serving cell, and this may be referred to as a bandwidth part (BWP). However, it is not limited to the above-described terms, and may be equally applied when a subset of bandwidth is used.

For example, the serving cell may be composed of one or more BWPs. In this case, information on a plurality of different BWPs may be configured in the terminal by the base station in the BWP of the serving cell, and the uplink BWP and the downlink BWP may always be configured in pairs. Therefore, configuration information for uplink and downlink may always be included in one BWP configuration information. In addition, as an example, among the plurality of BWP configurations described above, an activated BWP may be limited to one. However, if the terminal can activate more than one BWP, the base station may check information on the maximum number of activated BWPs of the corresponding terminal and activate a plurality of BWPs simultaneously based on this. In addition, as an example, when a serving cell is configured in the terminal, one BWP for the above-described serving cell may be activated even without separate signaling from the base station. In this case, the terminal may perform initial access to the serving cell, and the terminal may use the BWP activated upon initial access. In addition, the initial bandwidth (initial BWP) may be used until the terminal receives terminal configuration information from the base station.

In addition, after the terminal receives the terminal configuration from the base station, a default bandwidth (default BWP) may be set in the terminal. The basic bandwidth may be set to a relatively narrow bandwidth. When there is little data to be transmitted/received, the terminal can reduce battery consumption of the terminal by activating the above-described basic bandwidth. In addition, as an example, when the basic bandwidth is not set in the terminal, the terminal may use an initial bandwidth (initial BWP) for the same purpose, and is not limited to the above-described embodiment.

In addition, as an example, the activated BWP of the serving cell may be changed to another BWP according to the situation. This operation may be defined as BWP switching, and the terminal may deactivate a currently activated BWP and activate a new BWP when performing BWP switching. In this case, the above-described BWP switching operation may be performed when the UE receives a BWP switching instruction from the base station through a PDCCH order (PDCCH order). In addition, as an example, the above-described BWP switching operation may be performed through a predetermined timer “bwp-InactivityTimer” as a timer for BWP deactivation. Further, as an example, the above-described BWP switching operation may be performed when random access is started. Hereinafter, a situation in which the above-described BWP switching occurs will be described. The base station may change the BWP activated in the serving cell of the terminal according to the situation. When the terminal wants to change the activated BWP, the base station may inform the BWP to be switched through the PDCCH. In this case, the UE may perform a BWP switching operation through BWP switching related information included in the PDCCH.

In addition, as an example, the above-described “BWPInactivityTimer” may be configured for each serving cell. In this case, the “BWPInactivityTimer” may be a timer for deactivating the activated BWP, and is not limited to the above name. That is, the timer performing the same role may be the aforementioned “BWPInactivityTimer”. Hereinafter, it is referred to as “BWPInactivityTimer” for convenience of description, but is not limited thereto. In this case, when the above-described timer expires, the terminal may deactivate the currently activated BWP and activate the default BWP (default BWP). That is, switching can be performed with the basic BWP. In addition, as an example, based on the above description, when the basic BWP is not configured in the terminal, the terminal may switch to the initial BWP (initial BWP). In this case, the terminal can reduce battery consumption by monitoring a narrow bandwidth through the above-described switching operation. In addition, the above-described timer start and restart conditions may be shown in Table 2 below. That is, when the terminal needs to maintain the activated BWP as follows, the timer may be started or restarted to prevent the activated BWP from being deactivated. In addition, about BWP, it demonstrates more concretely below.

NR Uu BWP (Bandwidth Part)

Unlike LTE, the NR system has a very large system bandwidth that can be configured on one carrier. In particular, when the NR system is operated in a frequency range 2 (ie over 6GHz frequency bands) where many frequency bands and their bandwidths are available for the NR system, the system bandwidth available in the base station and the terminal bandwidth in which the terminal is actually operated are set differently. Can be. In this way, the system bandwidth assumed by the base station (network and system) and the frequency bandwidth used for the actual operation of the terminal are defined in the NR standard so that the capability of the maximum RF bandwidth of the base station and the terminal and the implementation and operation of the terminal associated therewith can be different. I did. As such, the base station provides the setting for the frequency bandwidth used by the terminal, which may be the bandwidth part setting. Depending on the terminal mode and BWP setting, the partial bandwidth setting used by the terminal may vary. In general, for initial cell access, the bandwidth part configuration that the base station provides to the terminal through system information is called initial active BWP, and is used to perform a random access procedure afterwards.

Initial DL active BWP

Mainly for the initial cell access of the terminal, as a bandwidth part provided by the base station through system information to the terminal, the bandwidth for the initial DL active BWP for SIB1 transmission through SS/PBCH block reception and the associated CORESET (Control Resource Set) configuration information Is provided. As a result, the bandwidth information of the initial terminal for receiving SIB1 (System Information Block 1) information is the initial DL active BWP.

Initial UL active BWP

In the SIB1, configuration information for performing a subsequent random access procedure is provided, as well as Initial UL active BWP information, which is information on the initial terminal uplink bandwidth for transmission and reception of some messages in the random access procedure (eg frequency position, bandwidth, numerology, etc.). Through the information, msg.3 (uplink RACH message transmission) is transmitted. The neuronality of the Initial UL active BWP is the same as the neurological information for msg.3 transmission.

□ PUSCH transmission for msg.3 in the RACH procedure and PUCCH transmission for HARQ feedback transmission for msg.4 are restricted within the initial active UL BWP.

-In an unpaired spectrum such as TDD, initial DL BWP and initial UL BWP share the same center frequency.

-Usually, the bandwidth of the initial active UL BWP is less than or equal to the minimum Tx bandwidth of the terminal.

-From the terminal point of view, only one initial active UL BWP is supported per cell-defined SSB.

Once the terminal accesses the network through the above-mentioned initial cell access procedure, up to four BWP settings can be provided to the terminal through terminal-specific RRC signaling. And only one BWP is active and used among multiple BWPs.

Mainly, the following basic setting information is composed of BWP settings.

-Numerology

-Frequency location (e.g. center frequency)

-Bandwidth (e.g. number of PRBs)

In addition, PDCCH/PDSCH/PUSCH, configured grant, SRS transmission-related configuration, and BFR configuration, etc. may be included and provided to the terminal.

Proposal of new operation for NR Uu BWP operation of NR V2X terminal and its application and setting method

In the present invention, the following operations related to setting and using NR Uu BWP and SL BWP are basically considered.

1. Independently of the Uu BWP setting, the SL BWP setting is provided to the NR V2X terminal (hereinafter, referred to as the terminal). That is, Uu BWP configuration and SL BWP configuration are independently provided to the NR V2X terminal.

2. Only one SL BWP configuration is provided to RRC idle, OOC NR V2X UE, and RRC CONNECTED UE. That is, only one SL BWP configuration for an NR V2X terminal is provided regardless of the terminal state (e.g. IDLE/INACTIVE/CONNECTED/OOC, etc.) in one carrier. Therefore, since a plurality of SL BWP configurations in one carrier do not exist in the UE, there is an advantage in that a switching operation is not required between SL BWPs and additional complexity can be reduced accordingly.

3. The NR V2X terminal can basically assume that the same neurology is used between the active UL BWP and the configured SL BWP in the same carrier for a specific time, but by the method proposed in the present invention, different Neurology may be considered for the V2X terminal. Here, the active UL BWP refers to one UL BWP currently selected/operated by the UE by DCI signaling, timer-based, or MAC/RRC signaling from among at least one or more UL BWPs configured for the UE. Of course, the downlink also has the same active DL BWP.

4. The terminal uses only one neurology (one CP length and SCS combination) with each other to perform V2X communication in the same carrier at a specific time.

In consideration of the above assumptions, the neuralgia setting of the Uu BWP of the NR network should be limited to the neuralgia setting of the SL BWP or at least be set equal. Because, in the above assumptions (especially assumptions 2 and 3), when the NR V2X terminal is within the network coverage, the neuralgia setting of the NR Uu active BWP and the neurological setting of the NR SL BWP in the same carrier are NR V2X. This is because it must be set identically to the terminal.

However, considering the service and traffic characteristics on the NR Uu link and performance requirements accordingly, the NR Uu BWP configuration provided by the base station independently of one or up to four is simply the NR Uu BWP for the simplicity of the SL BWP operation. It can be subordinate to neurology. Of course, in the case of an RRC CONNECTED mode NR V2X terminal, the base station may be appropriately configured through UE specific RRC signaling so that the NR Uu active BWP and SL BWP neurological settings can be the same. Therefore, in the case of an RRC CONNECTED V2X terminal, there may not be a large restriction on the above-described neurological configuration. On the other hand, other NR terminals in the NR network (eg IDLE terminals), unlike CONNECTED mode terminals, initial UL BWP configuration for initial cell access is cell-specific and provided to all terminals in the cell through system information. . In this case, unlike the configuration that is restricted to specific V2X terminals by the dedicated RRC signaling, NR network coverage for other general NR terminals if the initial UL BWP neuralgia setting should be matched with the SL BWP neuralgia setting. And link performance may be adversely affected.

5 is a diagram showing a collision between a sidelink BWP and an initial BWP.

Referring to FIG. 5, basically, one or more NR Uu BWP settings in one carrier (a serving cell set in the carrier) may be provided to an RRC CONNECTED mode terminal, otherwise, the initial provided through system information Active DL/UL BWP configuration information may be provided to terminals other than the RRC CONNECTED mode. In addition, SL BWP configuration information for SL V2X communication may be provided to the terminal through system information (system information for V2X communication) or RRC dedicated signaling in the network, and as already mentioned, only one SL per one carrier to the terminal BWP settings are provided to the terminal. In the above example, two NR Uu BWPs and one SL BWP are set to the terminal. In addition to this, the initial active BWP is also independently provided to the terminal through system information. In general, for a simple and smooth SL V2X communication, the network may intend to perform V2X communication on the network based on one neurology. This is because V2X communication based on unified neurological information can avoid simple operations and additional signaling of corresponding V2X terminals. Of course, in a specific situation or use case, it is possible to assume a single neurology within a corresponding session specifically (e.g. unicast/groupcast). However, this configuration basically causes a disadvantage of forcing the terminal to switch neuralgia.

In conclusion, at least on the NR network, one SL BWP and its corresponding neuralgia configuration will be provided to the terminals in a cell-specific manner, and such a configuration will be performed with the NR Uu BWP for the NR Uu. It should be aligned with a marallage. The RRC CONNECTED V2X terminal can be instructed to use the same BWP as the SL BWP through the dedicated RRC signal of the base station by setting and activating it, whereas the initial BWPs for initial access are cell-specific information, so the NR V2X terminal In addition, the general NR terminal has no choice but to share the same configuration information. Therefore, in this part, a potential neurological collision may be caused between SL and NR Uu (initial active BWP).

In particular, the initial BWP (DL/UL) for the NR Uu link used for cell access and fallback operation of the initial terminal (if the corresponding BWP setting is not provided by the base station) Since it has been designed for NR network operation, its impact on NR SL link BWP operation should be minimized. Due to the existence of a V2X terminal on the NR network, the restriction of initial BWP configuration used for initial cell access and fallback operation of existing general NR terminals cannot be justified.

Therefore, through the NR Uu BWP adaptation operation proposed in the present invention, we propose a method for enabling the NR Uu BWP operation and V2X communication using SL BWP in the NR network coverage by the terminal enabling NR V2X.

Proposed method. Initial Uu BWP switching operation for V2X terminal

Initial UL BWP is generally provided to UEs in a cell through system information (i.e. PBCH/SIB1) signaling of the base station in order for UEs that are not in the RRC CONNECTED mode within NR network coverage to attempt to access the initial cell. Upon receiving the system information, the initial cell access terminals initialize the RACH procedure on the serving cell based on the configuration information for performing the RACH procedure associated with the Initial active Downlink/Uplink BWP (=initial BWP) information.

Alternatively, unlike the above case, even an RRC CONNECTED terminal may receive initial active BWP configuration from the base station through dedicated RRC signaling. If the terminal has received the above configuration, the terminal can substitute the initial BWP configuration information provided through the system information with the information provided through dedicated RRC signaling. If not provided, the initial active BWP configuration information provided through the system information is used as it is. Therefore, even in the case of an RRC CONNECTED terminal, if dedicated RRC signaling is not provided, it cannot be free from the above problems.

When the RACH procedure is initialized on one serving cell, the MAC entity of the UE performs the following operation for the serving cell. It is assumed that the UE to which the following operation is applied is enabled V2X communication within NR network coverage and performs a BWP adaptation operation on NR Uu.

□ 1) If V2X communication is enabled and the PRACH occasion for NR Uu link is not set for the current active UL BWP,

o 2) In the same carrier, if initialUplinkBWP (initialDownlinkBWP) (by system information or dedicated RRC signaling) indicated by the UL BWP (DL BWP) neuralgia (eg CP length and SCS) of the SL BWP is set If they are the same,

-3) Switch the current active UL BWP to the BWP indicated by initialUplinkBWP.

-3) If the serving cell is SpCell (PCell or PSCell),

4) Switch the active DL BWP to the BWP indicated by initialDownlinkBWP. Likewise in this case, the neuralgia of the BWP indicated by initialDownlinkBWP should be the same as that of the SL BWP. As a result, the DL/UL initial BWP for the serving cell configured on the corresponding carrier and the neuronality of the SL BWP should be the same.

O 2) Otherwise, (in the same carrier, if initialUplinkBWP (initialDownlinkBWP) (by system information or dedicated RRC signaling) indicated by the UL BWP (DL BWP) neuronality (eg CP length and SCS) of the SL BWP is set If it is not the same as the marallage setting,)

6 is a diagram showing an NR Uu BWP operation based on Option 1.

□ 3) Option 1 is that the NR V2X terminal can expect that the SL BWP neurological settings can be different only while the neurology indicated by the initialUplinkBWP provided through the system information is used (e.g. during the RACH procedure). In other words, the initial active UL/DL BWP neurology and the SL BWP neurology provided by the system information may be different only in the above situation, so the current active UL BWP is switched to the BWP indicated by initialUplinkBWP. . During a specific time when such a case is performed, the NR V2X terminal performs the neurological switching between the initial active UL (DL) BWP and the SL BWP for NR Uu and SL transmission, and based on the TDM method between NR Uu and SL. The switching is performed and does not allow NR Uu and SL transmission and reception at the same moment.

-If Random Access messages for the NR RACH procedure and NR V2X transmission/reception occur at the same time, the NR RACH signal can be prioritized.

□ 3) If the serving cell is SpCell (PCell or PSCell),

-4) Switch the active DL BWP to the BWP indicated by initialDownlinkBWP.

In addition, as an example, FIG. 7 is a diagram illustrating an NR Uu BWP operation based on option 2.

□ 3) Option 2 independently provides initial active BWP configuration for V2X terminals in the NR network. For example, in addition to initialUplinkBWP (initialDownlinkBWP) for NR terminals in the same carrier, SL-initialUplinkBWP (SL-initialDownlinkBWP) configuration information for initial cell access of NR V2X terminals is provided through system information. The initial BWP configuration information for the above V2X terminal basically has the same neurology as the SL BWP configuration, which the terminal expects. Therefore, it is necessary to switch the UL active BWP indicated by the SL-initialUplinkBWP (SL-initialDownlinkBWP) to the BWP.

The new SL-initialUplinkBWP (SL-initialDownlinkBWP) configuration information should be basically included in system information provided by the base station to the terminal for V2X communication. In addition, when the RRC CONNECTED mode terminal uses the initial active BWP of the NR Uu link, the base station can provide the SL-initialUplinkBWP (SL-initialDownlinkBWP) configuration information to the terminal through dedicated RRC signaling.

□ 1) If not,

O 2) If the serving cell is SpCell (PCell or PSCell),

-3) If SL BWP and active UL BWP have the same neurology,

4) Active DL BWP is switched to DL BWP having the same BWP ID as active UL BWP.

-3) If not

4) SL-initial active DL BWP is switched to a DL BWP having the same BWP ID as the UL BWP.

□ 1) Stop if the bwp-inactivity timer related to the active DL BWP of this serving cell is running.

□ 1) If this serving cell is SCell,

O 2) Stop if bwp-inactivity timer related to active DL BWP of SpCell is running.

□ 1) A random access procedure is performed on the active UL BWP of this serving cell and the active DL BWP of SpCell.

According to this embodiment, the V2X terminal defines initial cell access and BWP fallback operation through initial active BWP configuration or SL-initial active BWP configuration in consideration of SL BWP configuration. The BWP fallback operation is a case in which the terminal uses initial active BWP configuration information when there is no BWP configuration information, and is an example in which the proposed method can be applied together with the initial cell access case.

8 is a flowchart of an option 1 method that can be applied in the present invention.

Referring to FIG. 8, initial BWP configuration information for an NR Uu link may be received through base station system information or designated RRC signaling. (S810) Next, base station system information and designated RRC signaling (dedicated RRC signaling) SL BWP configuration information for V2X communication may be received through RRC signaling) or pre-configuration. (S820) At this time, it may be determined whether the NR initial BWP and the SL BWP are set to the same neurology. (S830) For example, in the case of the same neurology, the NR initial cell access is performed using the corresponding NR initial BWP setting. Can be done. (S840) In addition, as an example, if they are not the same, the UE may perform NR initial cell access by assuming an independent neurology between NR Uu and SL in the initial cell access procedure (S850)

9 is a flowchart of an option 2 method applicable to the present invention.

Referring to FIG. 9, initial BWP configuration information for an NR Uu link may be received through base station system information or designated RRC signaling. (S910) Next, base station system information and designated RRC signaling (dedicated RRC signaling) SL BWP configuration information for V2X communication may be received through RRC signaling) or pre-configuration. (S920) Next, the UE may perform NR initial cell access based on SL initial BWP configuration information by assuming an independent neurology between NR Uu and SL in the initial cell access procedure (S930).

10 is a diagram showing a base station apparatus and a terminal apparatus.

The base station apparatus 1000 may include a processor 1020, an antenna unit 1012, a transceiver 1015, and a memory 1016.

The processor 1020 performs baseband-related signal processing and may include an upper layer processor 1030 and a physical layer processor 1040. The upper layer processing unit 1030 may process an operation of a medium access control (MAC) layer, a radio resource control (RRC) layer, or a higher layer. The physical layer processing unit 1040 may process an operation of a physical (PHY) layer (eg, uplink reception signal processing, downlink transmission signal processing). In addition to performing baseband-related signal processing, the processor 1020 may control the overall operation of the base station apparatus 1000.

The antenna unit 1012 may include one or more physical antennas, and may support multiple input multiple output (MIMO) transmission/reception when a plurality of antennas are included. The transceiver 1015 may include a radio frequency (RF) transmitter and an RF receiver. The memory 1016 may store information processed by the processor 1020, software related to the operation of the base station apparatus 1000, an operating system, an application, and the like, and may include components such as a buffer.

The processor 1020 of the base station 1000 may be configured to implement the operation of the base station in the embodiments described in the present invention.

The terminal device 1050 may include a processor 1070, an antenna unit 1062, a transceiver 1064, and a memory 1066. Meanwhile, as an example, in the present invention, communication between terminal devices may be performed based on sidelink communication. That is, in the present invention, each terminal device 1050 performing sidelink communication may be a device performing sidelink communication with the terminal device 1050 as well as the base station device 1000, and is not limited to the above-described embodiment. Does not.

The processor 1070 performs baseband-related signal processing and may include an upper layer processing unit 1080 and a physical layer processing unit 1062. The upper layer processing unit 1080 may process the operation of the MAC layer, the RRC layer, or higher layers. The physical layer processing unit 1090 may process an operation of the PHY layer (eg, downlink reception signal processing, uplink transmission signal processing). In addition to performing baseband-related signal processing, the processor 1070 may also control the overall operation of the terminal device 1050.

The antenna unit 1062 may include one or more physical antennas, and may support MIMO transmission and reception when a plurality of antennas are included. The transceiver 1064 may include an RF transmitter and an RF receiver. The memory 1066 may store information processed by the processor 1070, software related to the operation of the terminal device 1050, an operating system, and an application, and may include components such as a buffer.

The processor 1070 of the terminal device 1050 may be configured to implement the operation of the terminal in the embodiments described in the present invention.

Various embodiments of the present disclosure are not intended to list all possible combinations, but to describe representative aspects of the present disclosure, and matters described in the various embodiments may be applied independently or may be applied in combination of two or more.

In addition, various embodiments of the present disclosure may be implemented by hardware, firmware, software, or a combination thereof. For implementation by hardware, one or more ASICs (Application Specific Integrated Circuits), DSPs (Digital Signal Processors), DSPDs (Digital Signal Processing Devices), PLDs (Programmable Logic Devices), FPGAs (Field Programmable Gate Arrays), general purpose It may be implemented by a processor (general processor), a controller, a microcontroller, a microprocessor, or the like.

The scope of the present disclosure is software or machine-executable instructions (e.g., operating systems, applications, firmware, programs, etc.) that cause an operation according to the method of various embodiments to be executed on a device or computer, and such software or It includes a non-transitory computer-readable medium (non-transitory computer-readable medium) which stores instructions and the like and is executable on a device or a computer.

Base Station: 1000 Processor: 1020
Upper layer processing unit: 1530 Physical layer processing unit: 1040
Antenna unit: 1012 Transceiver: 1015
Memory: 1016 Terminal: 1050
Processor: 1070 Upper layer processing unit: 1062
Physical layer processing unit: 1080 Antenna unit: 1064
Transceiver: 1090 Memory: 1066

Claims (1)

In a method of performing communication based on a BandWidth Part (BWP) in a NR (New Radio) V2X (Vehicle to everything) system,
Receiving SL initial BWP configuration information for initial cell access of the Uu link;
Receiving SL BWP configuration information for V2X communication; And
Including; performing an initial cell connection.

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