WO2020091563A1 - Method and device for transmitting and receiving sidelink signal in wireless communication system - Google Patents

Abstract

Disclosed are: a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of 4G system; and a system therefor. The present disclosure can be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, security, and safety-related services, and the like) on the basis of 5G communication technology and IoT-related technology. The present disclosure relates to a wireless communication system, and to a method and a device for transmitting and receiving a sidelink signal and a physical channel.

Description

Method and apparatus for transmitting and receiving sidelink signals in wireless communication system

The present invention relates to a wireless communication system, and relates to a method and apparatus for transmitting and receiving sidelink signals and physical channels.

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 an LTE system (Post LTE) system. To achieve high data rates, 5G communication systems are being considered for implementation in the ultra-high frequency (mmWave) band (eg, 60 gigahertz (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, in order 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)) Hybrid FSK and QAM Modulation (FQAM) and SWSC (Sliding Window Superposition Coding), and advanced access technologies 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, 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), and MTC (Machine Type Communication). 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, technologies such as sensor network, machine to machine (M2M), and machine type communication (MTC) are being implemented by techniques such as beamforming, MIMO, and array antenna, which are 5G communication technologies. will be. 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.

A wireless communication system, in particular, a terminal intended to communicate in a side link for communication between a terminal and a terminal, may be a terminal having a function of transmitting and receiving a site link signal based on LTE and NR. This may be that LTE and NR-based sidelink signal transmission and reception are simultaneously activated. At this time, the terminal should determine which criteria to transmit and receive the LTE-based sidelink signal and the NR-based sidelink signal at a specific time and frequency. For example, it may be performed based on a setting from a base station, or performed based on an order already promised, or performed based on a priority of a packet to be transmitted / received. Accordingly, various embodiments of the present invention provide a method and apparatus for a terminal having an LTE and NR-based sidelink signal transmission / reception function to set a priority between LTE and NR and perform sidelink transmission and reception based thereon.

In a mobile communication system according to an embodiment of the present invention for achieving the above technical problem, a method for transmitting / receiving a signal from a terminal includes: checking a first time resource for transmitting a first signal related to the first communication system; Identifying a second time resource for receiving a second signal associated with the second communication system; Checking whether at least a portion of the first time resource and the second time resource overlap; And when at least a portion of the first time resource and the second time resource overlap, transmitting the first signal based on the quality of service (QoS) of the first signal or the second signal or the second signal. It may include performing any one of the operation of receiving.

A terminal of a mobile communication system according to an embodiment may include a transceiver that transmits and receives signals to or from a base station or another terminal; A first time resource for transmitting a first signal associated with a first communication system is identified, a second time resource for receiving a second signal associated with a second communication system is identified, and the first time resource and the second It is checked whether at least a part of the time resource overlaps, and when at least a part of the first time resource and the second time resource overlap, the first signal or the second signal is based on QoS (Quality of Service). It may include a control unit configured to perform either the operation of transmitting the first signal or the operation of receiving the second signal.

According to various embodiments of the present invention, a method and apparatus for transmitting and receiving sidelink signals in a wireless communication system may be provided.

In addition, according to various embodiments of the present invention, a terminal having a sidelink signal transmission / reception function based on LTE and NR may set a priority to determine a signal and a physical channel to transmit / receive and perform data transmission / reception accordingly.

1 is a diagram showing a downlink or uplink time-frequency domain transmission structure of an NR system according to an embodiment of the present invention.

FIG. 2 shows data allocated for frequency-time resources for enhanced mobile broadband (eMBB), ultra-reliable and low-latency communications (URLLC), and massive machine type communications (mMTC) in a communication system according to an embodiment of the present invention. It is a drawing showing the appearance.

3 is a view showing a state in which data for eMBB, URLLC, and mMTC are allocated from frequency-time resources in a communication system according to an embodiment of the present invention.

4 is a diagram illustrating a structure in which one transport block is divided into multiple code blocks and a cyclic redundancy check (CRC) is added according to an embodiment of the present invention.

FIG. 5 is a diagram illustrating an example of group casting in which one terminal transmits common data to a plurality of terminals according to an embodiment of the present invention.

FIG. 6 is a diagram illustrating a process in which terminals receiving common data through group casting according to an embodiment of the present invention transmit information related to success or failure of data reception to a terminal transmitting data.

FIG. 7 is a diagram illustrating a mapped state in a frequency and time domain of synchronization signals and a physical broadcast channel (PBCH) of a 3GPP NR system according to an embodiment of the present invention.

8 is a diagram showing which symbols are mapped in one SS / PBCH block according to an embodiment of the present invention.

FIG. 9 is a diagram showing which symbols an SS / PBCH block can be transmitted to symbols within 1 ms according to an embodiment of the present invention according to subcarrier intervals.

FIG. 10 is a diagram showing an SS / PBCH block in which slots and symbols within 5 ms can be transmitted according to subcarrier intervals according to an embodiment of the present invention.

11 is a diagram for an example in which group terminals transmit HARQ-ACK feedback using a common resource when transmitting groupcast data according to an embodiment of the present invention.

12 is a diagram illustrating an example in which group terminals transmit HARQ-ACK feedback using different resources when transmitting groupcast data according to an embodiment of the present invention.

13 is a diagram showing the configuration of a terminal according to embodiments of the present invention.

14 is a diagram showing a configuration of a base station according to embodiments of the present invention.

FIG. 15 is a diagram illustrating in which time domain the UE is assigned a resource pool for LTE sidelink transmission and reception and a resource pool for NR sidelink transmission and reception.

16 is a diagram illustrating an example in which a terminal performing LTE sidelink transmission and reception and NR sidelink transmission and reception receives sidelink signal transmission and reception from a base station or configuration information such as a resource pool from a base station.

FIG. 17 is a diagram illustrating an example of reporting resource pool information for a sidelink transmission / reception performed by a terminal performing LTE sidelink transmission / reception or NR sidelink transmission / reception to a base station.

FIG. 18 is a diagram illustrating in which time domain a resource pool for LTE sidelink transmission and reception and a resource pool for NR sidelink transmission and reception are allocated to one terminal.

19 is a diagram showing the operation of a terminal according to a fifth embodiment of the present invention.

20 is a diagram showing the operation of a base station according to a fifth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In describing the embodiments, descriptions of technical contents well known in the technical field to which the present invention pertains and which are not directly related to the present invention will be omitted. This is to more clearly convey the gist of the present invention 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 invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to completely inform the person having the scope of the invention, and the present invention 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 manner, 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). Since computer program instructions may be mounted on a computer or other programmable data processing equipment, a series of operational steps are performed on the 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 sequence. 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 the present embodiment means a hardware component such as software or an FPGA or an ASIC, and '~ unit' performs certain roles. 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 describing the present invention, when it is determined that a detailed description of a related function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or practice. Therefore, the definition should be made based on the contents throughout this specification.

Hereinafter, a base station is a subject that performs resource allocation of a terminal, and may be at least one of a gNode B (gNB), an eNode B (eNB), a Node B, a BS (Base Station), a radio access unit, a base station controller, or a node on a network. have. The terminal may perform a user equipment (UE), a mobile station (MS), a cellular phone, a smartphone, a vehicle or vehicle, or a pedestrian or road side unit (RSU), computer, or communication function. It may include a multimedia system. In the present invention, the downlink (Downlink, DL) is a wireless transmission path of a signal transmitted by the base station to the terminal, and the uplink (Uplink, UL) means a wireless transmission path of a signal transmitted by the terminal to the base station. In addition, various embodiments of the present invention will be described below as an example of the NR system, but various embodiments of the present invention may be applied to other communication systems having similar technical backgrounds or channel types. In addition, various embodiments of the present invention may be applied to other communication systems through some modifications within a range not significantly departing from the scope of the present invention as determined by a person having skilled technical knowledge.

In various embodiments of the present invention, the terms physical channel and signal may be used interchangeably with data or control signals. For example, a physical downlink shared channel (PDSCH) is a physical channel through which data is transmitted, but in an embodiment of the present invention, PDSCH may be referred to as data.

Hereinafter, in various embodiments of the present invention, higher layer signaling is a signal transmission from a base station to a terminal using a downlink data channel of a physical layer, or a signal transmitted from a terminal to a base station using a physical layer uplink data channel. It is a method and may be referred to as radio resource control (RRC) signaling or a control element (CE).

The wireless communication system deviates from providing an initial voice-oriented service, for example, 3GPP's High Speed Packet Access (HSPA), Long Term Evolution (LTE) or Evolved Universal Terrestrial Radio Access (E-UTRA), LTE-Advanced Advances into a broadband wireless communication system that provides high-speed, high-quality packet data services such as (LTE-A), 3GPP2 High Rate Packet Data (HRPD), Ultra Mobile Broadband (UMB), and IEEE 802.16e. Doing. In addition, 5G or NR (new radio) communication standards are being developed as the fifth generation wireless communication system.

As a representative example of the broadband wireless communication system, a downlink (DL) in an NR system and an orthogonal frequency division multiplexing (OFDM) method are adopted in the uplink. However, more specifically, a CP-OFDM (cyclic-prefix OFDM) scheme is adopted in the downlink, and two types of a Discrete Fourier transform spreading OFDM (DFT-S-OFDM) scheme are adopted in the uplink in addition to the CP-OFDM. Uplink refers to a radio link through which a user equipment (UE) or a mobile station (MS) transmits data or control signals to a base station (gNode B, or base station (BS)). A radio link that transmits data or control signals. The side link may refer to a radio link in which data transmission is performed by the UE to another UE or between the UE and the RSU. In the multiple access method described above, data or control information of each user is usually classified by assigning and operating so that time-frequency resources to which data or control information to be loaded for each user do not overlap, that is, orthogonality is established. do.

The NR system employs a hybrid automatic repeat reQuest (HARQ) method that retransmits the corresponding data in the physical layer when a decoding failure occurs in the initial transmission. In the HARQ method, when a receiver fails to correctly decode (decode) data, the receiver transmits information (Negative Acknowledgment) (NACK) that informs the transmitter of the decoding failure, so that the transmitter can retransmit the corresponding data in the physical layer. The receiver improves data reception performance by combining data retransmitted by the transmitter with data that has previously failed decoding. In addition, when the receiver correctly decodes data, the receiver may transmit acknowledgment (ACK) to inform the transmitter of decoding success, so that the transmitter can transmit new data.

1 is a view showing a basic structure of a time-frequency domain, which is a radio resource domain in which the data or control channel is transmitted in a downlink or uplink in an NR system according to an embodiment of the present invention.

In FIG. 1, the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. The minimum transmission unit in the time domain is an OFDM symbol, and N _symb (1-02) OFDM symbols are collected to form one slot (1-06). The length of the subframe is defined as 1.0 ms, and the radio frames 1-14 are defined as 10 ms. The minimum transmission unit in the frequency domain is a subcarrier, and the bandwidth of the entire system transmission bandwidth is composed of a total of N _BW (1-04) subcarriers.

The basic unit of resources in the time-frequency domain is a resource element (1-12, Resource Element; RE), which can be represented by an OFDM symbol index and a subcarrier index. Resource blocks (1-08, Resource Block; RB or Physical Resource Block; PRB) are N _symb (1-02) consecutive OFDM symbols in the time domain and N _RB (1-10) consecutive subcarriers in the frequency domain. Is defined as Therefore, one RB (1-08) is composed of N _symb x N _RB REs. Generally, the minimum transmission unit of data is the RB unit. In an NR system, N _symb = 14, N _RB = 12, and N _BW is proportional to the bandwidth of the system transmission band. The data rate may increase in proportion to the number of RBs scheduled for the terminal. In the NR system, in the case of a frequency division duplex (FDD) system in which downlink and uplink are divided into frequencies, a downlink transmission bandwidth and an uplink transmission bandwidth may be different. The channel bandwidth represents a radio frequency (RF) bandwidth corresponding to the system transmission bandwidth. Table 1 and Table 2 show some of the correspondence between the system transmission bandwidth, subcarrier spacing, and channel bandwidth defined in the NR system in the frequency band lower than 6 GHz and in the frequency band higher than 6 GHz, respectively. Shows. For example, an NR system having a 100 MHz channel bandwidth with a 30 kHz subcarrier width consists of 273 RBs of transmission bandwidth. In the following, N / A may be a bandwidth-subcarrier combination not supported by the NR system.

Channel bandwidth BW Channel [MHz]	Subcarrier width	5	10	20	50	80	100
Transmission bandwidth configuration N RB	15 kHz	25	52	106	270	N / A	N / A
	30 kHz	11	24	51	133	217	273
	60 kHz	N / A	11	24	65	107	135

Channel bandwidth BW Channel [MHz]	Subcarrier width	50	100	20	50
Transmission bandwidth configuration N RB	60 kHz	66	132	264	N / A
	120 kHz	32	66	132	264

In the NR system, scheduling information for downlink data or uplink data is transmitted from a base station to a terminal through downlink control information (DCI). DCI is defined according to various formats, whether it is scheduling information (UL grant) for uplink data or scheduling information (DL grant) for downlink data, and whether compact DCI has a small control information size according to each format. , Whether spatial multiplexing using multiple antennas is applied, whether DCI is used for power control, and the like. For example, DCI format 1-1, which is scheduling control information (DL grant) for downlink data, may include at least one of the following control information.

-Carrier indicator: indicates which frequency carrier is transmitted.

-DCI format indicator: It is an indicator to distinguish whether the corresponding DCI is for downlink or uplink.

-Bandwidth part (BWP) indicator: indicates which BWP is being transmitted.

-Frequency domain resource allocation: indicates the RB of the frequency domain allocated for data transmission. The resources to be expressed are determined according to the system bandwidth and resource allocation method.

-Time-domain resource allocation: Indicate which OFDM symbol of which slot and which data-related channel is to be transmitted.

-VRB-to-PRB mapping: indicates how to map a virtual RB (VRB) index and a physical RB (PRB) index.

-Modulation and coding scheme (MCS): indicates the modulation scheme and coding rate used for data transmission. That is, a coding rate value capable of informing transport block size (TBS) and channel coding information together with information on whether it is QPSK, 16QAM, 64QAM, or 256QAM may be indicated.

-CBG transmission information (Codeblock group transmission information): When CBG unit retransmission is set, indicates information on which CBG is transmitted.

-HARQ process number (HARQ process number): indicates the process number of the HARQ.

-New data indicator (New data indicator): indicates whether the HARQ initial transmission or retransmission.

-Redundancy version: indicates a redundancy version of HARQ.

-Transmission power control command for a physical uplink control channel (PUCCH) (Transmit Power Control (TPC) command for PUCCH): indicates a transmission power control command for the uplink control channel PUCCH.

In the case of PDSCH transmission, the time domain resource assignment may be transmitted by information on a slot in which the PDSCH is transmitted and the number of symbols L in which the starting symbol position S and the PDSCH in the corresponding slot are mapped. 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. .

if

then

else

where

In the NR system, in general, through RRC configuration, the UE can set a table including SLIV values in one row, PDSCH or PUSCH mapping type, and information about a slot in which a PDSCH or PUSCH is transmitted. Thereafter, the base station transmits information on the SLIV value, the PDSCH or PUSCH mapping type, the PDSCH or the slot through which the PUSCH is transmitted, by indicating the index value in the set table for the time domain resource allocation of the DCI. Can be.

In the NR system, PDSCH or PUSCH mapping types are defined as type A (type A) and type B (type B). In PDSCH or PUSCH mapping type A, the first symbol is located in a demodulation reference signal (DMRS) symbol in a second or third OFDM symbol in a slot. In the PDSCH or PUSCH mapping type B, the first symbol of the DMRS symbol is located in the first OFDM symbol in the time domain resource allocated by PUSCH transmission.

The DCI may be transmitted on a downlink physical control channel (PDCCH) through channel coding and modulation.

In general, the DCI is scrambled with a specific Radio Network Temporary Identifier (RNTI) (or terminal identifier) independently for each terminal, and CRC (cyclic redundancy check) is added, and after channel coding, each PDCCH is configured. Is transmitted. The PDCCH is mapped and transmitted in a control resource set (CORESET) set for the UE.

The downlink data may be transmitted on a physical downlink shared channel (PDSCH), which is a physical channel for downlink data transmission. The PDSCH may be transmitted after the control resource set, and scheduling information such as a specific mapping position and modulation method in time and frequency domains is determined based on DCI transmitted through the PDCCH.

Among the control information constituting the DCI, the base station notifies the UE of the modulation method applied to the PDSCH to be transmitted and the size of the data to be transmitted (TBS). In an embodiment, the MCS may consist of 5 bits or more or fewer bits. The TBS corresponds to the size before the channel coding for error correction is applied to data (transport block, transport block, TB) that the base station wants to transmit.

In the present invention, the transport block (TB) may include a medium access control (MAC) header, a MAC control element (CE), one or more MAC service data units (SDUs), and padding bits. have. Alternatively, TB may indicate a unit of data or MAC protocol data unit (PDU) that is transferred from the MAC layer to the physical layer.

Modulation schemes supported by the NR system are QPSK (Quadrature Phase Shift Keying), 16QAM (Quadrature Amplitude Modulation), 64QAM, and 256QAM, and each modulation order (Qm) corresponds to 2, 4, 6, and 8 . That is, 2 bits per symbol for QPSK modulation, 4 bits per symbol for 16QAM modulation, 6 bits per symbol for 64QAM modulation, and 8 bits per symbol for 256QAM modulation.

2 and 3 are diagrams showing data allocated for eMBB, URLLC, and mMTC, which are services considered in a 5G or NR system according to an embodiment of the present invention, allocated from frequency-time resources.

2 and 3, it is possible to see how frequency and time resources are allocated for information transmission in each system.

First, in FIG. 2, data for eMBB, URLLC, and mMTC are allocated in the entire system frequency band (2-00). When eMBB (2-01) and mMTC (2-09) are allocated and transmitted in a specific frequency band, URLLC data (2-03, 2-05, 2-07) occurs, and eMBB (2- 01) and mMTC (2-09) can be emptied, or URLLC data (2-03, 2-05, 2-07) can be transmitted without emptying. Since URLLC is required to reduce the delay time among the above services, URLLC data may be allocated (2-03, 2-05, 2-07) and transmitted to a portion of the resource 2-01 to which the eMBB is allocated. Of course, when the URLLC is additionally allocated and transmitted from the resource to which the eMBB is allocated, eMBB data may not be transmitted from the overlapped frequency-time resource, and thus the transmission performance of the eMBB data may be lowered. That is, in the above case, eMBB data transmission failure due to URLLC allocation may occur.

In FIG. 3, the entire system frequency band (3-00) can be divided and used for transmitting services and data in each subband (3-02, 3-04, 3-06). The information related to the subband configuration may be determined in advance, and this information may be transmitted to the UE through higher layer signaling. Alternatively, the information related to the sub-band may be randomly divided by a base station or a network node to provide services to the terminal without transmitting additional sub-band configuration information. In FIG. 3, a subband 3-02 shows eMBB data transmission, a subband 3-04 shows URLLC data transmission, and a subband 306 shows a state used for transmission of mMTC data.

Throughout the embodiment, the length of the transmission time interval (TTI) used for URLLC transmission may be shorter than the length of the TTI used for eMBB or mMTC transmission. In addition, the response of URLLC-related information can be transmitted faster than eMBB or mMTC, and accordingly, information can be transmitted and received with a low delay. The structure of a physical layer channel used for each type to transmit the three services or data may be different. For example, at least one of a length of a transmission time period (TTI), an allocation unit of frequency resources, a structure of a control channel, and a mapping method of data may be different.

In the above, three types of services and three types of data are described, but more types of services and corresponding data may exist, and in this case, the contents of the present invention may be applied.

The terms physical channel and signal in an NR system may be used to describe the method and apparatus proposed in the embodiment. However, the contents of the present invention can be applied to a wireless communication system other than the NR system.

4 is a diagram illustrating a process in which one transport block is divided into several code blocks and a CRC is added according to an embodiment of the present invention.

Referring to FIG. 4, a CRC (4-03) may be added to the last or frontmost part of a transport block (TB) to be transmitted in uplink or downlink. The CRC (4-03) may have 16 bits or 24 bits, a fixed number of bits, or a variable number of bits according to a channel condition, and may be used to determine whether channel coding is successful. The block to which TB (4-01) and CRC (4-03) are added can be divided into several codeblocks (CBs) (4-07, 4-09, 4-11, 4-13) ( 4-05). The code blocks (4-07, 4-09, 4-11, 4-13) may be divided by a predetermined maximum size, in which case the last code block (4-13) may be smaller in size than other code blocks or , Or 0, a random value or 1 can be set to match the length of other code blocks. CRCs (4-17, 4-19, 4-21, 4-23) may be added to the divided code blocks (4-15). The CRCs (4-17, 4-19, 4-21, 4-23) may have 16 bits or 24 bits or a predetermined number of bits, and may be used to determine whether channel coding is successful.

TB (4-01) and a cyclic generator polynomial can be used to generate the CRC (4-03), and the cyclic generator polynomial can be defined in various ways. For example, cyclic generator polynomial g for 24 bit CRC _CRC24A (D) = D ²⁴ + D ²³ + D ¹⁸ + D ¹⁷ + D ¹⁴ + D ¹¹ + D ¹⁰ + D ⁷ + D ⁶ + D ⁵ + D ⁴ Assuming + D ³ + D + 1, and L = 24, TB data

About, CRC

The

_Divide by g _CRC24A (D), and the remainder becomes 0.

Can decide. In the above, the CRC length L is described as an example of 24, but the length may be determined in various lengths such as 12, 16, 24, 32, 40, 48, and 64. After adding CRC (4-03) to TB (4-01) in the above process, it is divided into N CBs (4-07, 4-09, 4-11, and 4-13). CRC (4-17, 4-19, 4-21, 4-23) is added to each divided CB (4-07, 4-09, 4-11, 4-13) (4-15) . CRC (4-17, 4-19, 4-21, 4-23) added to the CB (4-07, 4-09, 4-11, 4-13) is added to TB (4-01) A CRC of a different length than when generating CRC (4-03) or a polynomial of a cyclic generator can be used. However, CRC (4-03) added to the TB (4-01) and CRCs added to the code block (4-07, 4-09, 4-11, 4-13) (4-17, 4-19) , 4-21, 4-23) may be omitted depending on the type of channel code to be applied to the code block. For example, when an LDPC code other than a turbo code is applied to a code block, CRCs (4-17, 4-19, 4-21, 4-23) to be inserted for each code block may be omitted. However, even when LDPC is applied, CRCs (4-17, 4-19, 4-21, 4-23) may be added to the code block as they are. In addition, even when a polar code is used, CRC may be added or omitted.

As shown in FIG. 4, the maximum length of one code block is determined according to the type of channel coding applied to the TB to be transmitted, and the CRC added to TB and TB according to the maximum length of the code block is a code block. Splitting is performed. In a conventional LTE system, a CRC for CB is added to the divided CB, and data bits and CRC of the CB are encoded with a channel code to determine coded bits, and each coded bit is previously promised. The number of bits that are rate matched together is determined.

The following embodiments provide a method and apparatus for transmitting and receiving data between a base station and a terminal or terminal. In this case, data may be transmitted from one terminal to a plurality of terminals, or may be a case where data is transmitted from one terminal to one terminal. Or, it may be a case where data is transmitted from a base station to a plurality of terminals. However, the present invention may be applied in various cases without being limited thereto.

5 is a group casting in which one terminal 5-01 according to an embodiment of the present invention transmits common data to a plurality of terminals (5-03, 5-05, 5-07, 5-09). It is a figure showing an example of (groupcasting, 5-11). The terminal 5-01 may be a mobile terminal such as a vehicle. Separate control information, physical control channels, and data transmission may be performed for the group casting.

FIG. 6 shows information related to success or failure of data reception by terminals (6-03, 6-05, 6-07, 6-09) receiving common data through group casting according to an embodiment of the present invention. It is a diagram showing a process of transmitting to the transmitting terminal 6-01. The information may be information such as HARQ-ACK feedback (6-11). In addition, the terminals (6-03, 6-05, 6-07, 6-09) may be a terminal having an LTE-based sidelink or an NR-based sidelink function. If the terminal only has the LTE-based sidelink function, transmission and reception of the NR-based sidelink signal and physical channel will be impossible. In various embodiments of the present invention, the side link may be used in combination with PC5 or V2X or device to device (D2D). 5 and 6 illustrate an example of transmission and reception according to group casting, but this can also be applied to transmission and reception of a unicast signal between the terminal and the terminal.

7 is a diagram illustrating a mapped state in a frequency and time domain of a synchronization signal and a physical broadcast channel (PBCH) of a 3GPP NR system according to an embodiment of the present invention. The primary synchronization signal (PSS, 7-01), the secondary synchronization signal (SSS, 7-03), and the PBCH (7-05) are mapped over 4 OFDM symbols, and the PSS (7- 01) and SSS (7-03) are mapped to 12 RBs, and PBCH is mapped to 20 RBs. A table of FIG. 7 shows how the frequency bands of 20 RBs change according to subcarrier spacing (SCS). The resource areas through which the PSS 7-01, SSS 7-03, and PBCH 7-05 are transmitted may be referred to as SS / PBCH blocks.

8 is a diagram showing which symbols are mapped in one SS / PBCH block according to an embodiment of the present invention. It shows an example of a conventional LTE system using a subcarrier spacing of 15 kHz and an NR system using a subcarrier spacing of 30 kHz, and can avoid cell-specific reference signals (CRSs) that are always transmitted in the LTE system. It is designed to transmit SS / PBCH blocks (8-11, 8-13, 8-15, 8-17) of the NR system at the location (8-01, 8-03, 8-05, 8-07). . This may be to allow the LTE system and the NR system to coexist in one frequency band.

FIG. 9 is a diagram showing in which sub-carrier intervals an SS / PBCH block can be transmitted to symbols within 1 ms according to an embodiment of the present invention, and FIG. 10 is a diagram according to an embodiment of the present invention This is a diagram in which SS / PBCH blocks can be transmitted in which slots and symbols within 5 ms according to subcarrier intervals. In the area where the SS / PBCH block can be transmitted, the SS / PBCH block does not always have to be transmitted, and may or may not be transmitted depending on the selection of the base station.

In various embodiments of the present invention, a sidelink control channel may be called a PSCCH (physical sidelink control channel), and a sidelink shared channel or a data channel may be called a PSSCH (physical sidelink shared channel). Also, a broadcast channel broadcast with a synchronization signal may be called a PSBCH (physical sidelink broadcast channel), and a channel for feedback transmission may be called a PSFCH (physical sidelink feedback channel). However, PSCCH or PSSCH may be used and transmitted for feedback transmission. It may be referred to as LTE-PSCCH, LTE-PSSCH, NR-PSCCH, NR-PSSCH, etc. according to the communication system to be transmitted.

[First Embodiment]

The first embodiment relates to a method for determining transmission and reception in a terminal capable of performing LTE sidelink signal transmission and NR sidelink signal reception. The first embodiment will be described with reference to FIG.

FIG. 11 is a diagram illustrating an example in which a time resource for transmitting an LTE sidelink signal and a channel and a time resource for receiving or attempting to receive an NR sidelink signal and channel overlap in one terminal. .

Although the present embodiment is described on the assumption that the subframe boundary for LTE sidelink transmission and the subframe boundary for NR sidelink reception coincide, the method provided by the present invention can be applied even if the boundary does not match. As illustrated in FIG. 11, when a terminal transmits data to be transmitted through an LTE sidelink or is scheduled to transmit data, the terminal must transmit the relevant signal and channel through the LTE sidelink, and at the same time, In the time resource for receiving the NR sidelink signal, the NR sidelink signal should be received. However, if the terminal is a terminal that cannot perform transmission and reception at the same time, that is, in a situation such as the example of FIG. 11 of a situation in which a corresponding terminal has a half duplex restriction, one of LTE sidelink transmission and NR sidelink reception is selected. I have no choice but to do it. This can be defined as an event.

When the above event occurs or when the event is identified or determined, the terminal may use one or more of the following methods in combination for transmission and reception operations. When at least one method is used in combination, priorities may be preset for different methods.

-Method 1: LTE sidelink signal or channel can always be transmitted. This method can be applied when data or control signals to be transmitted in the LTE sidelink exist, which may be because there is no guarantee that signals or physical channels to be received in the NR sidelink exist at the time when the LTE sidelink should be transmitted. have. Therefore, the NR sidelink reception operation may be omitted when a synchronization signal, a PSSCH, or a PSCCH is transmitted to the LTE sidelink. The NR sidelink reception operation may include blind detection of a control channel and data decoding.

-Method 2: It can be determined by using the priority of the LTE sidelink data packet to be transmitted. It is possible to determine whether to transmit the LTE-PSSCH or perform the NR sidelink reception operation by comparing the priority of a transport block to be transmitted with the LTE-PSSCH and a preset priority threshold. The priority may be a value determined as a priority transmitted from a higher level, and may be determined based on values such as ProSe Per-Packet Priority (PPPP) or ProSe Per-Packet Reliability (PPPR). For example, when the priority of a transport block to be transmitted to the LTE-PSSCH is called N_LTE, and the preset priority boundary value is called Priority_threshold, the LTE-PSSCH is transmitted when N_LTE is less than or equal to Priority_threshold by comparing N_LTE and Priority_threshold. can do. That is, in this case, the LTE sidelink transmission operation is performed. Conversely, when N_LTE is greater than Priority_threshold, an NR sidelink reception operation is performed instead of an LTE sidelink transmission operation. The Priority_threshold may be determined according to the base station setting, but may be a value fixed in advance or changed according to the LTE sidelink setting or region.

-Method 3: When the LTE-PSSCH is transmitted, it may be determined whether to perform LTE sidelink transmission or NR sidelink reception according to the presence or absence of retransmission of a transport block transmitted in the LTE-PSSCH. If the transport block to be transmitted through the LTE-PSSCH is retransmitted, the LTE sidelink transmission operation is not performed, and the NR sidelink reception operation can be performed. This may be because the gain when performing retransmission may not be large because the same transport block has already been initially transmitted.

-Method 4: It is possible to determine whether to perform LTE sidelink transmission or NR sidelink reception according to the type of signal or channel to be received on the NR sidelink. For example, when HARQ-ACK feedback for data previously transmitted through an NR sidelink is to be transmitted in a corresponding slot, the UE may perform an NR sidelink reception operation instead of LTE sidelink transmission. Or, when HARQ-ACK feedback for data previously transmitted through the NR sidelink is to be transmitted in the corresponding slot, the priority value of the LTE sidelink signal to transmit the previously transmitted data, that is, the priority value of the corresponding transmission block Compared with, it is possible to determine whether to perform LTE sidelink transmission or NR sidelink reception. In the above, it may be determined by using a different QoS (Quality of Service) value instead of the Priority value of the data previously transmitted through the NR sidelink. In addition, a method for determining whether to perform LTE sidelink transmission or NR sidelink reception depending on whether a candidate signal or channel to be received through the NR sidelink is a signal or channel for synchronization purposes, or a data channel or a feedback channel. Can be

Which of the above methods should be used may be preset in the terminal, or may be set by higher level signaling. In addition, the terminal may receive parameters necessary for determining each of the above methods from the base station in advance.

[Second Embodiment]

The second embodiment relates to a method for determining transmission and reception in a terminal capable of performing LTE sidelink signal reception and NR sidelink signal transmission. The second embodiment will be described with reference to FIG. 12.

12 is a diagram for an example of overlapping time resources for transmitting an LTE sidelink signal and a channel and time resources for transmitting an NR sidelink signal and a channel in one terminal according to an embodiment of the present invention. It is one drawing.

In this embodiment, it is assumed on the assumption that the subframe boundary for LTE sidelink reception and the subframe boundary for NR sidelink transmission match, but the method provided by the present invention can be applied even if the boundary does not match. As shown in FIG. 12, when a terminal transmits data to be transmitted through an NR sidelink or is scheduled to transmit data, the terminal must transmit the relevant signal and channel through the NR sidelink, and at the same time, In the time resource for receiving the LTE sidelink signal, the LTE sidelink signal should be received. However, if the terminal is a terminal that cannot simultaneously perform transmission and reception, that is, in a situation such as the example of FIG. 12 of a situation in which the terminal has a half duplex restriction condition, one of LTE sidelink reception and NR sidelink transmission is selected. I have no choice but to do it. This can be defined as an event.

When the above event occurs or when the event is identified or determined, the terminal may use one or more of the following methods in combination for transmission and reception operations. When at least one method is used in combination, priorities may be preset for different methods.

-Method 1: You can always transmit NR sidelink signal or channel. This method can be applied when there is data or control signals to be transmitted on the NR sidelink, which may be because there is no guarantee that there is a signal or physical channel to be received on the LTE sidelink at the time when the NR sidelink should be transmitted. have. Therefore, when the synchronization signal, the PSSCH, or the PSCCH is transmitted to the NR sidelink, the LTE sidelink reception operation may be omitted. The LTE sidelink reception operation may include blind detection and data decoding of the control channel.

-Method 2: It can be determined by using the QoS parameter of the NR sidelink data packet to be transmitted. The QoS parameters may include priority, latency, reliability, and target range. In the following description, priority is given as an example of QoS parameters, but may not be limited now. It is possible to determine whether to transmit an NR-PSSCH or to perform an LTE sidelink reception operation by comparing the priority of a transport block to be transmitted to the NR-PSSCH and a preset priority threshold. The priority may be a value determined as a priority transmitted from a higher level, and may be determined based on values such as ProSe Per-Packet Priority (PPPP) or ProSe Per-Packet Reliability (PPPR). For example, when the priority of a transport block to be transmitted to the NR-PSSCH is called N_NR, and the preset priority boundary value is called Priority_threshold, N_NR is compared with Priority_threshold to transmit NR-PSSCH when N_NR is less than or equal to Priority_threshold. can do. That is, in this case, an NR sidelink transmission operation is performed. Conversely, when N_NR is greater than Priority_threshold, the LTE sidelink reception operation is performed instead of the NR sidelink transmission operation. The Priority_threshold may be determined according to the base station configuration, but may be a fixed fixed value or a value applied according to the NR sidelink configuration or region.

-Method 3: When NR-PSSCH is transmitted, it may be determined whether to perform NR sidelink transmission or LTE sidelink reception according to whether or not retransmission of a transport block transmitted in the NR-PSSCH is performed. If the transport block to be transmitted through the NR-PSSCH is retransmitted, the NR sidelink transmission operation may be performed without performing the NR sidelink transmission operation. This may be because the gain when performing retransmission may not be large because the same transport block has already been initially transmitted.

-Method 4: It is possible to determine whether to perform LTE sidelink reception or NR sidelink transmission according to the type of signal or channel to be transmitted by NR sidelink. For example, when HARQ-ACK feedback for data previously transmitted through an NR sidelink in a corresponding slot is scheduled to be transmitted, the UE may perform an NR sidelink transmission operation instead of LTE sidelink reception. Or, if HARQ-ACK feedback for data previously transmitted through an NR sidelink is to be transmitted in a corresponding slot, whether to perform LTE sidelink reception according to the previously transmitted or transmitted data, that is, a priority value of a corresponding transmission block , NR sidelink transmission can be performed. In the above, it may be determined by using another QoS (Quality of Service) value instead of the Priority value of data previously transmitted or transmitted through the NR sidelink. In addition, a method for determining whether to perform LTE sidelink reception or NR sidelink transmission according to whether a candidate signal or channel to be transmitted through the NR sidelink is a signal or channel for synchronization purposes, or a data channel or a feedback channel. Can be

Which of the above methods should be used may be preset in the terminal, or may be set by higher level signaling. In addition, the terminal may receive parameters necessary for determining each of the above methods from the base station in advance.

[Example 3]

The third embodiment is a method for coexistence (coexistence) of LTE sidelink transmission and reception and NR sidelink transmission, and describes a method of combining and using the methods provided in the first and second embodiments. The first embodiment provides a coexistence method of LTE sidelink transmission and NR sidelink reception, and the second embodiment provides a coexistence method of LTE sidelink reception and NR sidelink transmission. In the same situation as in the example of FIG. 11, that is, an event in which the terminal must perform one of LTE sidelink transmission and NR sidelink reception may occur. Hereinafter, for convenience of description, these events are referred to as event A. Can be mentioned. Meanwhile, in the same situation as in the example of FIG. 12, that is, an event in which the terminal selects one of the LTE sidelink reception and the NR sidelink transmission may occur, and the event B is described below for convenience of explanation. Can be mentioned.

For example, the terminal may always perform LTE sidelink transmission in the event A event, and may always perform NR sidelink transmission in the event B event. This may be to perform a transmission operation because there is uncertainty that a received signal is present. Alternatively, the terminal determines whether to transmit by comparing QoS values such as Priority of data to be transmitted through the LTE sidelink in the event A event to a preset QoS value, and transmits through the NR sidelink in the event B event. It is possible to determine whether to transmit data by comparing QoS values such as Priority or Latency or the like of data with a preset QoS value.

[Example 4]

The fourth embodiment describes a method of transmitting control information through a side link.

The sidelink control information (SCI) may include sidelink feedback control information (SFCI). The SCI may be transmitted through a physical sidelink control channel (PSCCH) or a physical sidelink feedback channel (PSFCH). SCI and SFCI may be transmitted to the receiving terminal including at least one of the following information.

-Forward / backward scheduling indicator: An indicator indicating whether a terminal transmitting control information also transmits data or a terminal receiving control information transmits data.

-HARQ-ACK feedback piggyback indicator: An indicator indicating whether HARQ-ACK feedback is transmitted with or without data.

-Bitmap indicator indicating that HARQ-ACK information corresponding to the indicated HARQ process is transmitted: If the corresponding bit is 1, HARQ-ACK information corresponding to the corresponding HARQ process must be transmitted or transmitted.

-Whether an RS for measuring channel status is being transmitted or an indicator for transmitting RS configuration information

-Indicator to trigger channel status reporting

The information included in the SCI or SFCI may include at least one of the information described above.

[Example 5]

The fifth embodiment is a method and apparatus for setting a resource pool so that a terminal does not perform LTE sidelink transmission and reception and NR sidelink transmission and reception simultaneously, FIGS. 15, 16, 17, 18, 19, and 20 It will be explained with reference to.

15 is a terminal for a resource pool for transmitting and receiving LTE sidelink (15-00, 15-01, 15-02, 15-03) and a resource pool for transmitting and receiving NR sidelink (15-10, 15-11, 15 -12, 15-13) are diagrams showing which time domains are allocated.

Referring to FIG. 15, the terminal may transmit or receive each sidelink in the resource pool, which is predetermined or set. However, there may be time resources in which the resource pools for LTE sidelink transmission and reception and the resource pools for NR sidelink transmission and reception overlap in the time domain (15-20, 15-21, 15-22, 15-23, 15-24). ). Therefore, the terminal transmits LTE and NR sidelinks in the time domains (15-20, 15-21, 15-22, 15-23, 15-24) where both the LTE sidelink resource pool and the NR sidelink resource pool are allocated. Alternatively, the reception operation may be performed at the same time or may be performed by selecting one of the LTE sidelink operation and the NR sidelink operation. If it is possible to arbitrarily determine the terminal to perform the operation by selecting one of the LTE sidelink operation and the NR sidelink operation, the base station capable of scheduling the sidelink may have no information on how the terminal operates, and thus the corresponding frequency band Can be difficult to operate efficiently.

16 is a terminal (16-03) performing LTE sidelink transmission / reception (16-04) and NR sidelink transmission / reception (16-06), scheduling sidelink signal transmission / reception from a base station (16-01) (16- 02) A diagram showing an example of receiving or receiving configuration information such as a resource pool from a base station.

For example, in the figure, when the base station 16-01 is scheduling the NR sidelink transmission / reception (16-06) of the terminal 16-03, the NR sidelink in the resource scheduled by the base station 16-01 Transmission / reception (16-06) may not be performed due to overlap in LTE sidelink transmission / reception (16-04) and time resources. This is because when the terminal 16-03 is scheduled to perform NR sidelink transmission and reception and LTE sidelink transmission and reception on the same time resource, LTE sidelink transmission and reception can be performed.

FIG. 17 shows resource pool information (17-02) for sidelink transmission and reception performed by a terminal 17-03 performing LTE sidelink transmission and reception (17-04) or NR sidelink transmission and reception (17-06). It is a diagram showing an example of reporting to the base station 17-01.

As an example, the terminal 17-03 may receive a transmission and reception resource pool configuration for LTE sidelink transmission and reception (17-04), and may be performing an LTE sidelink operation. In order for the terminal 17-03 to access the base station 17-01 to perform NR sidelink transmission and reception (17-06), the base station 17-01 sends the terminal 17-03 the current terminal's In order to transmit / receive LTE or NR sidelinks, it is possible to instruct and request to report some or all of the configuration information possessed by the terminal 17-03. According to the instruction and the request, the terminal 17-03 is a part of the configuration information that the terminal 17-03 has for the LTE or NR sidelink transmission and reception of the current terminal 17-03 to the base station 17-01 or The whole is transmitted to the base station 17-01. The sidelink configuration information may include the following information.

SL-CommResourcePool  information element

-ASN1START

SL-CommTxPoolList-r12 :: = SEQUENCE (SIZE (1..maxSL-TxPool-r12)) OF SL-CommResourcePool-r12

SL-CommTxPoolListExt-r13 :: = SEQUENCE (SIZE (1..maxSL-TxPool-v1310)) OF SL-CommResourcePool-r12

SL-CommTxPoolListV2X-r14 :: = SEQUENCE (SIZE (1..maxSL-V2X-TxPool-r14)) OF SL-CommResourcePoolV2X-r14

SL-CommRxPoolList-r12 :: = SEQUENCE (SIZE (1..maxSL-RxPool-r12)) OF SL-CommResourcePool-r12

SL-CommRxPoolListV2X-r14 :: = SEQUENCE (SIZE (1..maxSL-V2X-RxPool-r14)) OF SL-CommResourcePoolV2X-r14

SL-CommResourcePool-r12 :: = SEQUENCE {

sc-CP-Len-r12 SL-CP-Len-r12,

sc-Period-r12 SL-PeriodComm-r12,

sc-TF-ResourceConfig-r12 SL-TF-ResourceConfig-r12,

data-CP-Len-r12 SL-CP-Len-r12,

dataHoppingConfig-r12 SL-HoppingConfigComm-r12,

ue-SelectedResourceConfig-r12 SEQUENCE {

data-TF-ResourceConfig-r12 SL-TF-ResourceConfig-r12,

trpt-Subset-r12 SL-TRPT-Subset-r12 OPTIONAL-Need OP

} OPTIONAL,-Need OR

rxParametersNCell-r12 SEQUENCE {

tdd-Config-r12 TDD-Config OPTIONAL,-Need OP

syncConfigIndex-r12 INTEGER (0..15)

} OPTIONAL,-Need OR

txParameters-r12 SEQUENCE {

sc-TxParameters-r12 SL-TxParameters-r12,

dataTxParameters-r12 SL-TxParameters-r12

} OPTIONAL,-Cond Tx

...,

[[priorityList-r13 SL-PriorityList-r13 OPTIONAL-Cond Tx

]]

}

SL-CommResourcePoolV2X-r14 :: = SEQUENCE {

sl-OffsetIndicator-r14 SL-OffsetIndicator-r12 OPTIONAL,-Need OR

sl-Subframe-r14 SubframeBitmapSL-r14,

adjacencyPSCCH-PSSCH-r14 BOOLEAN,

sizeSubchannel-r14 ENUMERATED {

n4, n5, n6, n8, n9, n10, n12, n15, n16, n18, n20, n25, n30,

n48, n50, n72, n75, n96, n100, spare13, spare12, spare11,

spare10, spare9, spare8, spare7, spare6, spare5, spare4,

spare3, spare2, spare1},

numSubchannel-r14 ENUMERATED {n1, n3, n5, n8, n10, n15, n20, spare1},

startRB-Subchannel-r14 INTEGER (0..99),

startRB-PSCCH-Pool-r14 INTEGER (0..99) OPTIONAL,-Need OR

rxParametersNCell-r14 SEQUENCE {

tdd-Config-r14 TDD-Config OPTIONAL,-Need OP

syncConfigIndex-r14 INTEGER (0..15)

} OPTIONAL,-Need OR

dataTxParameters-r14 SL-TxParameters-r12 OPTIONAL,-Cond Tx

zoneID-r14 INTEGER (0..7) OPTIONAL,-Need OR

threshS-RSSI-CBR-r14 INTEGER (0..45) OPTIONAL,-Need OR

poolReportId-r14 SL-V2X-TxPoolReportIdentity-r14 OPTIONAL,-Need OR

cbr-pssch-TxConfigList-r14 SL-CBR-PPPP-TxConfigList-r14 OPTIONAL,-Need OR

resourceSelectionConfigP2X-r14 SL-P2X-ResourceSelectionConfig-r14 OPTIONAL,-Cond P2X

syncAllowed-r14 SL-SyncAllowed-r14 OPTIONAL,-Need OR

restrictResourceReservationPeriod-r14 SL-RestrictResourceReservationPeriodList-r14 OPTIONAL,-Need OR

...,

[[sl-MinT2ValueList-r15 SL-MinT2ValueList-r15 OPTIONAL,-Need OR

cbr-pssch-TxConfigList-v1530 SL-CBR-PPPP-TxConfigList-v1530 OPTIONAL-Need OR

]]

}

SL-TRPT-Subset-r12 :: = BIT STRING (SIZE (3..5))

SL-V2X-TxPoolReportIdentity-r14 :: = INTEGER (1..maxSL-PoolToMeasure-r14)

SL-MinT2ValueList-r15 :: = SEQUENCE (SIZE (1..maxSL-Prio-r13)) OF SL-MinT2Value-r15

SL-MinT2Value-r15 :: = SEQUENCE {

priorityList-r15 SL-PriorityList-r13,

minT2Value-r15 INTEGER (10..20)

}

-ASN1STOP

The above information is an example of resource pool configuration information that can be used for LTE V2X or D2D operation. Information such as a frequency resource and a time resource region may be included, and a part or all of the configuration information may be transmitted by the corresponding terminal 17-03 to the base station 17-01. The base station 17-01, based on the received information, the terminal 17-03 performs LTE sidelink transmission and reception, and in performing NR sidelink transmission and reception, LTE and NR based sidelink operations are simultaneously performed. To avoid the need, a resource pool for NR sidelink transmission and reception may be set.

18 is a terminal for a resource pool for transmitting and receiving LTE sidelink (18-00, 18-01, 18-02, 18-03) and a resource pool for transmitting and receiving NR sidelink (18-10, 18-11, 18 -12, 18-13) is a diagram showing to which time domain is assigned.

The terminal may transmit or receive each sidelink in the resource pool, which is predetermined or set. As illustrated in FIG. 17, the base station 17-01 performs LTE sidelink transmission and reception and the NR sidelink transmission and reception in the terminal 17-03 based on the received information. A resource pool for NR sidelink transmission and reception can be set so that the base sidelink operation does not need to be performed simultaneously. As a result, as shown in FIG. 18, resource pools for transmitting and receiving LTE sidelinks (18-00, 18-01, 18-02, 18-03) and resource pools for transmitting and receiving NR sidelinks (18-10, 18-) 11, 18-12, 18-13) can be set so that they do not overlap in the time domain. Through this, time resources (15-20, 15-21, 15-22, 15-23) overlapped in a time domain of resource pools for LTE sidelink transmission and reception and resource pools for NR sidelink transmission and reception as shown in FIG. 15. , 15-24). Alternatively, a resource pool for NR sidelink may be set to minimize overlapping in the time domain. According to such a configuration, the base station may not operate the NR sidelink operation arbitrarily, and thus, the corresponding frequency band can be efficiently operated.

17 and 18 have been described as an example, while the terminal is performing the LTE sidelink operation and reporting information on the resource pool for the LTE sidelink to the base station, embodiments of the present invention are not limited thereto. While performing the NR sidelink operation, it may be reporting information about the resource pool for the NR sidelink to the base station. In addition, in the embodiments of the present invention, the base station may be a gNB, but it can also be applied to an eNB.

19 is a diagram illustrating a terminal operation according to a fifth embodiment of the present invention.

Referring to FIG. 19, the terminal may receive information on a resource pool for LTE or NR sidelink from a base station (19-01). The request may be delivered as a higher level signaling or physical layer signal. In the above, the terminal requested from the base station reports the resource pool information for LTE or NR sidelink already set or has to the base station (19-03). The terminal is a new LTE or NR sidelink resource that is set so that the LTE sidelink resource pool and the NR sidelink resource pool do not overlap on the time axis or the overlapping portion is minimized based on the resource pool information for the LTE or NR sidelink. Pool information can be received. The UE may receive and transmit LTE sidelink and / or NR sidelink based on the new LTE or NR sidelink resource pool information.

20 is a diagram showing the operation of a base station according to a fifth embodiment of the present invention.

Referring to FIG. 20, the base station may request the terminal to report LTE or NR sidelink resource pool information (20-01). Thereafter, the terminal reports the LTE or NR sidelink resource pool information to the base station, and the base station can receive it (20-03). The base station may set the LTE or NR sidelink resource pool of the corresponding terminal so that the LTE sidelink resource pool and the NR sidelink resource pool do not overlap in the time axis as shown in the example of FIG. 18 or the overlapping portion is minimized (20-05).

To perform the above embodiments of the present invention, a transmitting unit, a receiving unit, and a processing unit of a terminal and a base station are illustrated in FIGS. 13 and 14, respectively. In the above embodiments, a method of transmitting a HARQ-ACK of a terminal is determined, and a method of transmitting / receiving a terminal or a base station for performing AGC is shown. To perform this, a receiving unit, a processing unit, and a transmitting unit of the base station and the terminal, respectively, according to the embodiment It should work. In the following operation, the base station may be a terminal performing transmission on the sidelink or a conventional base station. In the following operation, the terminal may be a terminal that performs transmission or reception on the sidelink.

Specifically, FIG. 13 is a diagram showing the configuration of a terminal according to an embodiment of the present invention.

As illustrated in FIG. 13, the terminal of the present invention may include a terminal receiving unit 13-00, a terminal transmitting unit 13-04, and a terminal processing unit 13-02. The terminal receiving unit 13-00 and the terminal transmitting unit 13-04 are collectively referred to as a transmitting / receiving unit in an embodiment of the present invention. The transmitting and receiving unit may transmit / receive signals to / from a base station, another terminal, or a network node. 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 terminal processing unit 13-02, and transmit a signal output from the terminal processing unit 13-02 through the wireless channel. The terminal processing unit 13-02 may control a series of processes so that the terminal operates according to the above-described embodiment of the present invention. The terminal processing unit 13-02 may be referred to as a controller or a control unit, and may include at least one processor.

14 is a diagram showing the configuration of a base station according to an embodiment of the present invention.

As shown in FIG. 14, the base station of the present invention may include a base station receiver 14-01, a base station transmitter 14-05, and a base station processor 14-03. The base station receiving unit 14-01 and the base station transmitting unit 14-05 may be collectively referred to as a transmission / reception unit in an embodiment of the present invention. The transmitting and receiving unit may transmit / receive signals to / from a terminal, another base station, or a network node. 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 14-03, and transmit a signal output from the base station processing unit 14-03 through the wireless channel. The base station processing unit 14-03 may control a series of processes so that the base station can operate according to the above-described embodiment of the present invention. The base station processor 13-02 may be referred to as a controller or a controller, and may include at least one processor.

On the other hand, the embodiments of the present invention disclosed in this specification and the drawings are merely to provide a specific example to easily explain the technical content of the present invention and to help understand the present invention, and are not intended to limit the scope of the present invention. That is, it is apparent to those skilled in the art to which other modifications based on the technical idea of the present invention can be practiced. In addition, each of the above embodiments can be operated in combination with each other as necessary. For example, it may be possible to apply the first embodiment and the fourth embodiment in combination. In addition, other modifications based on the technical idea of the embodiment may be implemented in the above embodiments, such as an LTE system or a 5G system.

Claims (14)

1. In the method of transmitting and receiving signals of a terminal in a mobile communication system,

   Identifying a first time resource for transmitting a first signal associated with the first communication system;

   Identifying a second time resource for receiving a second signal associated with the second communication system;

   Checking whether at least a portion of the first time resource and the second time resource overlap; And

   When at least a part of the first time resource and the second time resource overlap, an operation of transmitting the first signal or the second signal based on the quality of service (QoS) of the first signal or the second signal And performing any of the operations of receiving.
2. According to claim 1,

   The QoS, characterized in that the priority information (Priority) of the first signal or the second signal.
3. According to claim 1,

   The QoS of the first signal is characterized in that it is determined based on ProSe Per-Packet Priority (PPPP) or ProSe Per-Packet Reliability (PPPR).
4. According to claim 1,

   The second signal is a HARQ-ACK feedback signal for previously transmitted data,

   The QoS of the second signal is characterized in that it is determined based on the QoS of the data.
5. According to claim 1,

   Checking the QoS of the first signal and the second signal; And

   And when the QoS of the first signal is higher than that of the second signal, performing the operation of transmitting the first signal.
6. According to claim 1,

   Checking the QoS of the first signal and the second signal; And

   And when the QoS of the second signal is higher than that of the first signal, further comprising performing an operation of receiving the second signal.
7. According to claim 1,

   Checking the QoS of the first signal; And

   And when the QoS of the first signal is equal to or greater than a preset threshold, transmitting the first signal.
8. In the terminal of the mobile communication system,

   A transceiver that transmits and receives signals to or from a base station or other terminal;

   A first time resource for transmitting a first signal associated with a first communication system is identified, a second time resource for receiving a second signal associated with a second communication system is identified, and the first time resource and the second It is checked whether at least a part of the time resource overlaps, and when at least a part of the first time resource and the second time resource overlap, the first signal or the second signal is based on QoS (Quality of Service). A terminal comprising a control unit configured to perform either the operation of transmitting the first signal or the operation of receiving the second signal.
9. The method of claim 8,

   The QoS is a terminal, characterized in that the priority information (Priority) of the first signal or the second signal.
10. The method of claim 8,

    The QoS of the first signal is characterized in that it is determined based on ProSe Per-Packet Priority (PPPP) or ProSe Per-Packet Reliability (PPPR).
11. The method of claim 8,

    The second signal is a HARQ-ACK feedback signal for previously transmitted data,

    The QoS of the second signal is characterized in that it is determined based on the QoS of the data, the terminal.
12. The method of claim 8,

    The control unit,

    It characterized in that it is further configured to check the QoS of the first signal and the second signal, and perform the operation of transmitting the first signal when the QoS of the first signal is higher than the QoS of the second signal, Terminal.
13. The method of claim 8,

    The control unit,

    It characterized in that it is further configured to check the QoS of the first signal and the second signal, and perform the operation of receiving the second signal when the QoS of the second signal is higher than the QoS of the first signal, Terminal.
14. The method of claim 8,

    Checking the QoS of the first signal, characterized in that further configured to transmit the first signal, if the QoS of the first signal is greater than or equal to a preset threshold (threshold).

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