WO2020091563A1 - Procédé et dispositif pour émettre et recevoir un signal de liaison latérale dans un système de communication sans fil - Google Patents

Procédé et dispositif pour émettre et recevoir un signal de liaison latérale dans un système de communication sans fil Download PDF

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Publication number
WO2020091563A1
WO2020091563A1 PCT/KR2019/014849 KR2019014849W WO2020091563A1 WO 2020091563 A1 WO2020091563 A1 WO 2020091563A1 KR 2019014849 W KR2019014849 W KR 2019014849W WO 2020091563 A1 WO2020091563 A1 WO 2020091563A1
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WIPO (PCT)
Prior art keywords
signal
sidelink
terminal
qos
data
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Ceased
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PCT/KR2019/014849
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English (en)
Korean (ko)
Inventor
여정호
류현석
박성진
오진영
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Priority claimed from KR1020190017087A external-priority patent/KR102739000B1/ko
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Priority to EP19879117.0A priority Critical patent/EP3849124A4/fr
Priority to CN201980071069.4A priority patent/CN113056886B/zh
Priority to US17/289,121 priority patent/US12185355B2/en
Publication of WO2020091563A1 publication Critical patent/WO2020091563A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Definitions

  • 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.
  • 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.
  • 4G network Beyond 4G Network
  • LTE Post LTE
  • 5G communication systems are being considered for implementation in the ultra-high frequency (mmWave) band (eg, 60 gigahertz (60 GHz) band).
  • mmWave ultra-high frequency
  • ACM Advanced Coding Modulation
  • FQAM Hybrid FSK and QAM Modulation
  • SWSC Small Cell Superposition Coding
  • FBMC Fan Bank Multi Carrier
  • NOMA non orthogonal multiple access
  • SCMA parse code multiple access
  • IoT Internet of Things
  • IoE Internet of Everything
  • sensing technology wired / wireless communication and network infrastructure, service interface technology, and security technology
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • IoT Internet Technology
  • 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.
  • 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.
  • 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.
  • QoS quality of service
  • a terminal of a mobile communication system 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.
  • QoS Quality of Service
  • a method and apparatus for transmitting and receiving sidelink signals in a wireless communication system may be provided.
  • 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.
  • FIG. 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.
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable and low-latency communications
  • mMTC massive machine type communications
  • FIG. 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.
  • FIG. 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.
  • CRC cyclic redundancy check
  • 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. 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.
  • FIG. 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.
  • FIG. 13 is a diagram showing the configuration of a terminal according to embodiments of the present invention.
  • FIG. 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.
  • FIG. 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.
  • 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).
  • 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.
  • 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.
  • ' ⁇ 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.
  • ' ⁇ 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 downlink (Downlink, DL) is a wireless transmission path of a signal transmitted by the base station to the terminal
  • the uplink (Uplink, UL) means a wireless transmission path of a signal transmitted by the terminal to the base station.
  • 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.
  • 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.
  • 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).
  • RRC radio resource control
  • CE control element
  • 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.
  • 5G or NR (new radio) communication standards are being developed as the fifth generation wireless communication system.
  • a downlink (DL) in an NR system and an orthogonal frequency division multiplexing (OFDM) method are adopted in the uplink.
  • OFDM orthogonal frequency division multiplexing
  • a CP-OFDM (cyclic-prefix OFDM) scheme is adopted in the downlink
  • 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)).
  • gNode B base station
  • BS base station
  • 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.
  • 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.
  • HARQ hybrid automatic repeat reQuest
  • the receiver 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.
  • NACK Negative Acknowledgment
  • the receiver improves data reception performance by combining data retransmitted by the transmitter with data that has previously failed decoding.
  • the receiver may transmit acknowledgment (ACK) to inform the transmitter of decoding success, so that the transmitter can transmit new data.
  • ACK acknowledgment
  • FIG. 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.
  • the horizontal axis represents the time domain
  • the vertical axis represents the frequency domain.
  • the minimum transmission unit in the time domain is an OFDM symbol
  • 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
  • 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.
  • the data rate may increase in proportion to the number of RBs scheduled for the terminal.
  • 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.
  • an NR system having a 100 MHz channel bandwidth with a 30 kHz subcarrier width consists of 273 RBs of transmission bandwidth.
  • N / A may be a bandwidth-subcarrier combination not supported by the NR system.
  • Subcarrier width 50 100 20 50 Transmission bandwidth configuration N RB 60 kHz 66 132 264 N / A 120 kHz 32 66 132 264
  • DCI downlink control information
  • 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.
  • 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.
  • BWP -Bandwidth part
  • -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.
  • MCS Modulation and coding scheme
  • -CBG transmission information (Codeblock group transmission information): When CBG unit retransmission is set, indicates information on which CBG is transmitted.
  • HARQ process number indicates the process number of the HARQ.
  • -New data indicator indicates whether the HARQ initial transmission or retransmission.
  • -Redundancy version indicates a redundancy version of HARQ.
  • Transmit Power Control (TPC) command for PUCCH indicates a transmission power control command for the uplink control channel PUCCH.
  • 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.
  • S may be a relative position from the start of the slot
  • L may be the number of consecutive symbols
  • S and L may be determined from a start and length indicator value (SLIV) defined as follows. .
  • 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.
  • PDSCH or PUSCH mapping types are defined as type A (type A) and type B (type B).
  • type A the first symbol is located in a demodulation reference signal (DMRS) symbol in a second or third OFDM symbol in a slot.
  • DMRS demodulation reference signal
  • 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.
  • PDCCH downlink physical control channel
  • 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.
  • RNTI Radio Network Temporary Identifier
  • CRC cyclic redundancy check
  • the downlink data may be transmitted on a physical downlink shared channel (PDSCH), which is a physical channel for downlink data transmission.
  • PDSCH physical downlink shared channel
  • 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.
  • 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).
  • 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.
  • the transport block may include a medium access control (MAC) header, a MAC control element (CE), one or more MAC service data units (SDUs), and padding bits.
  • MAC medium access control
  • CE MAC control element
  • SDU MAC service data units
  • padding bits may have.
  • TB may indicate a unit of data or MAC protocol data unit (PDU) that is transferred from the MAC layer to the physical layer.
  • PDU MAC protocol data unit
  • 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.
  • FIGS. 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.
  • data for eMBB, URLLC, and mMTC are allocated in the entire system frequency band (2-00).
  • 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.
  • 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.
  • 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.
  • a subband 3-02 shows eMBB data transmission
  • a subband 3-04 shows URLLC data transmission
  • a subband 306 shows a state used for transmission of mMTC data.
  • 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.
  • 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.
  • the terms physical channel and signal in an NR system may be used to describe the method and apparatus proposed in the embodiment.
  • the contents of the present invention can be applied to a wireless communication system other than the NR system.
  • FIG. 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.
  • 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.
  • 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.
  • CRC (4-03) 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the present invention may be applied in various cases without being limited thereto.
  • the terminal 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).
  • 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.
  • 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.
  • FIG. 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).
  • SCS subcarrier spacing
  • 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.
  • FIG. 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.
  • CRSs cell-specific reference signals
  • 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
  • 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.
  • 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.
  • 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).
  • 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).
  • 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.
  • 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. .
  • the method provided by the present invention can be applied even if the boundary does not match.
  • the terminal 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.
  • 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.
  • the terminal may use one or more of the following methods in combination for transmission and reception operations.
  • priorities may be preset for different methods.
  • 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).
  • PPPP ProSe Per-Packet Priority
  • PPPR ProSe Per-Packet Reliability
  • 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.
  • LTE-PSSCH 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.
  • Which of the above methods should be used may be preset in the terminal, or may be set by higher level signaling.
  • the terminal may receive parameters necessary for determining each of the above methods from the base station in advance.
  • 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.
  • FIG. 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.
  • the method provided by the present invention can be applied even if the boundary does not match.
  • the terminal 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.
  • 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.
  • the terminal may use one or more of the following methods in combination for transmission and reception operations.
  • 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.
  • 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).
  • PPPP ProSe Per-Packet Priority
  • PPPR ProSe Per-Packet Reliability
  • N_NR the priority of a transport block to be transmitted to the NR-PSSCH
  • Priority_threshold 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.
  • NR-PSSCH 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.
  • Which of the above methods should be used may be preset in the terminal, or may be set by higher level signaling.
  • the terminal may receive parameters necessary for determining each of the above methods from the base station in advance.
  • 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
  • the second embodiment provides a coexistence method of LTE sidelink reception and NR sidelink transmission.
  • event A an event in which the terminal must perform one of LTE sidelink transmission and NR sidelink reception may occur.
  • these events are referred to as event A.
  • the event B is described below for convenience of explanation. Can be mentioned.
  • 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.
  • 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.
  • the fourth embodiment describes a method of transmitting control information through a side link.
  • the sidelink control information may include sidelink feedback control information (SFCI).
  • SCI may be transmitted through a physical sidelink control channel (PSCCH) or a physical sidelink feedback channel (PSFCH).
  • PSCCH physical sidelink control channel
  • PSFCH physical sidelink feedback channel
  • 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.
  • the information included in the SCI or SFCI may include at least one of the information described above.
  • 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.
  • 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.
  • 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)
  • 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.
  • 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
  • n4 n5, n6, n8, n9, n10, n12, n15, n16, n18, n20, n25, n30,
  • numSubchannel-r14 ENUMERATED ⁇ n1, n3, n5, n8, n10, n15, n20, spare1 ⁇ ,
  • zoneID-r14 INTEGER (0..7) OPTIONAL,-Need OR
  • SL-MinT2ValueList-r15 :: SEQUENCE (SIZE (1..maxSL-Prio-r13)) OF SL-MinT2Value-r15
  • priorityList-r15 SL-PriorityList-r13
  • 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.
  • 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.
  • 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.
  • 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.
  • 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).
  • 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.
  • 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.
  • the base station may be a gNB, but it can also be applied to an eNB.
  • FIG. 19 is a diagram illustrating a terminal operation according to a fifth embodiment of the present invention.
  • 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.
  • 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.
  • 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).
  • 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.
  • 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.
  • the base station may be a terminal performing transmission on the sidelink or a conventional base station.
  • the terminal may be a terminal that performs transmission or reception on the sidelink.
  • FIG. 13 is a diagram showing the configuration of a terminal according to an embodiment of the present invention.
  • 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.
  • 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.
  • 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.
  • FIG. 14 is a diagram showing the configuration of a base station according to an embodiment of the present invention.
  • 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.
  • 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.
  • 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.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne : une technique de communication permettant de fusionner, avec une technologie de l'IdO, un système de communication 5G permettant de prendre en charge un débit de transmission de données supérieur à celui d'un système 4G ; et un système associé. La présente invention peut être appliquée à des services intelligents (par exemple, une maison intelligente, un bâtiment intelligent, une ville intelligente, une voiture intelligente ou une voiture connectée, des soins de santé, l'enseignement numérique, le commerce de détail, les services liés à la sécurité et à la sûreté, et analogues) sur la base d'une technologie de communication 5G et d'une technologie associée à l'IdO. La présente invention concerne un système de communication sans fil ainsi qu'un procédé et un dispositif permettant de transmettre un signal de liaison latérale et un canal physique.
PCT/KR2019/014849 2018-11-02 2019-11-04 Procédé et dispositif pour émettre et recevoir un signal de liaison latérale dans un système de communication sans fil Ceased WO2020091563A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP19879117.0A EP3849124A4 (fr) 2018-11-02 2019-11-04 Procédé et dispositif pour émettre et recevoir un signal de liaison latérale dans un système de communication sans fil
CN201980071069.4A CN113056886B (zh) 2018-11-02 2019-11-04 无线通信系统中发送和接收旁链路信号的方法和设备
US17/289,121 US12185355B2 (en) 2018-11-02 2019-11-04 Method and device for transmitting and receiving sidelink signal in wireless communication system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2018-0133520 2018-11-02
KR20180133520 2018-11-02
KR1020190017087A KR102739000B1 (ko) 2018-11-02 2019-02-14 무선 통신 시스템에서 사이드링크 신호 송수신 방법 및 장치
KR10-2019-0017087 2019-02-14

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Citations (2)

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Publication number Priority date Publication date Assignee Title
WO2018082571A1 (fr) * 2016-11-04 2018-05-11 Telefonaktiebolaget Lm Ericsson (Publ) Procédés et appareils de programmation de transmission dans un système de communication sans-fil
WO2018174691A1 (fr) * 2017-03-24 2018-09-27 엘지전자 주식회사 Procédé de transmission d'un signal de synchronisation de liaison latérale dans un système de communication sans fil, et terminal utilisant ce procédé

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Publication number Priority date Publication date Assignee Title
WO2018082571A1 (fr) * 2016-11-04 2018-05-11 Telefonaktiebolaget Lm Ericsson (Publ) Procédés et appareils de programmation de transmission dans un système de communication sans-fil
WO2018174691A1 (fr) * 2017-03-24 2018-09-27 엘지전자 주식회사 Procédé de transmission d'un signal de synchronisation de liaison latérale dans un système de communication sans fil, et terminal utilisant ce procédé

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ERICSSON: "Coexistence Between Sidelink and Uplink Transmission", R2-1700948. 3GPP TSG-RAN WG2 #97, 3 February 2017 (2017-02-03), Athens, Greece, XP051222795 *
INTEL CORPORATION: "Coexistence Mechanisms for eV2X Services", R1-1810781. 3GPP TSG RAN WG1 MEETING #94BIS, 29 September 2018 (2018-09-29), Chengdu, China, XP051518186 *
LG ELECTRONICS: "Discussion on coexistence mechanisms", R1-1808528. 3GPP TSG RAN WG1 MEETING #94, 11 August 2018 (2018-08-11), Gothenburg, Sweden, XP051515906 *

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