WO2023043242A1 - Procédé et dispositif de transmission de données de liaison latérale à un terminal de réception dans un fonctionnement drx de liaison latérale dans un système de communication sans fil - Google Patents

Procédé et dispositif de transmission de données de liaison latérale à un terminal de réception dans un fonctionnement drx de liaison latérale dans un système de communication sans fil Download PDF

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Publication number
WO2023043242A1
WO2023043242A1 PCT/KR2022/013835 KR2022013835W WO2023043242A1 WO 2023043242 A1 WO2023043242 A1 WO 2023043242A1 KR 2022013835 W KR2022013835 W KR 2022013835W WO 2023043242 A1 WO2023043242 A1 WO 2023043242A1
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Prior art keywords
terminal
triggered
transmission
bsr
base station
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PCT/KR2022/013835
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English (en)
Korean (ko)
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박기원
이승민
백서영
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엘지전자 주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Definitions

  • the present disclosure relates to a wireless communication system. Specifically, the present disclosure relates to a method and apparatus for transmitting sidelink data to a receiving terminal during sidelink DRX operation in a wireless communication system.
  • a wireless communication system is a multiple access system that supports communication with multiple users by sharing available system resources (eg, bandwidth, transmission power, etc.).
  • multiple access systems include a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access (TDMA) system, an orthogonal frequency division multiple access (OFDMA) system, and a single carrier frequency (SC-FDMA) system.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency
  • MC-FDMA division multiple access
  • MC-FDMA multi carrier frequency division multiple access
  • SL refers to a communication method in which a direct link is established between user equipments (UEs) and voice or data is directly exchanged between the terminals without going through a base station (BS).
  • UEs user equipments
  • BS base station
  • the SL is being considered as a method for solving the burden of the base station due to rapidly increasing data traffic.
  • V2X vehicle-to-everything refers to a communication technology that exchanges information with other vehicles, pedestrians, infrastructure-built objects, etc. through wired/wireless communication.
  • V2X can be divided into four types: V2V (vehicle-to-vehicle), V2I (vehicle-to-infrastructure), V2N (vehicle-to-network), and V2P (vehicle-to-pedestrian).
  • V2X communication may be provided through a PC5 interface and/or a Uu interface.
  • next-generation radio access technology taking into account the above may be referred to as new radio access technology (RAT) or new radio (NR).
  • RAT new radio access technology
  • NR new radio
  • V2X vehicle-to-everything
  • an object of the present disclosure is to provide a method and apparatus for transmitting sidelink data to a receiving terminal during sidelink DRX operation in a wireless communication system.
  • the present disclosure provides a method and apparatus for predicting the DRX activation time of a receiving terminal during sidelink DRX operation in a wireless communication system and determining whether to cancel transmission of a triggered SR based on whether it exists within a PDB request. The purpose.
  • the present disclosure provides a method and apparatus for predicting the DRX activation time of a receiving terminal during sidelink DRX operation in a wireless communication system and determining whether to cancel transmission of a triggered BSR based on whether or not it exists within a PDB request. The purpose.
  • a method performed by a first terminal to transmit SL data to a second terminal operating sidelink discontinuous reception (SL DRX) in a wireless communication system use Identifying a first trigger of a buffer status report (BSR) based on available SL data, and a second trigger of a scheduling request (SR) based on the first trigger of the BSR Identifying, determining the DRX active time of the second terminal for the triggered BSR based on the triggered SR, and based on transmission of the triggered BSR and transmission of the triggered SR
  • the DRX active time of the second terminal exists within the PDB request (packet delay budget requirement) for the resource to be allocated, transmitting the triggered SR to the base station, or transmitting the triggered BSR and the trigger
  • the DRX active time of the second terminal does not exist within the PDB request for resources to be allocated based on the transmission of the SR, canceling the transmission of the triggered BSR and the transmission of the triggered triggered
  • a transceiver and at least one processor Including, wherein the at least one processor identifies a first trigger of a buffer status report (BSR) based on available SL data, and a scheduling request based on the first trigger of the BSR configured to identify a second trigger of (scheduling request, SR) and determine a DRX active time of a second terminal for the triggered BSR based on the triggered SR, the at least one processor When the DRX active time of the second terminal exists within the PDB request (packet delay budget requirement) for the resource to be allocated based on the transmission of the triggered BSR and the transmission of the triggered SR, the triggered When the SR is transmitted, or the DRX active time of the second terminal does not exist within the PDB request for the resource to be allocated based on the transmission of the triggered B
  • PDB request packet delay budget requirement
  • a method and apparatus for transmitting sidelink data to a receiving terminal during sidelink DRX operation in a wireless communication system may be provided.
  • a method for predicting the DRX active time of a receiving terminal during sidelink DRX operation in a wireless communication system and determining whether to cancel transmission of a triggered SR based on whether it exists within a PDB request and devices is provided.
  • a method for predicting the DRX activation time of a receiving terminal during sidelink DRX operation in a wireless communication system and determining whether to cancel transmission of a triggered BSR based on whether it exists within a PDB request and devices is provided.
  • FIG. 1 shows the structure of an NR system according to an embodiment of the present disclosure.
  • FIG. 2 shows functional division between NG-RAN and 5GC, according to an embodiment of the present disclosure.
  • FIG 3 illustrates a radio protocol architecture according to an embodiment of the present disclosure.
  • FIG. 4 shows a structure of a radio frame of NR according to an embodiment of the present disclosure.
  • FIG. 5 illustrates a slot structure of an NR frame according to an embodiment of the present disclosure.
  • FIG 6 shows an example of BWP according to an embodiment of the present disclosure.
  • FIG. 7 illustrates a radio protocol architecture for SL communication according to an embodiment of the present disclosure.
  • FIG. 8 shows a synchronization source or synchronization reference of V2X according to an embodiment of the present disclosure.
  • FIG 9 illustrates a procedure for a terminal to perform V2X or SL communication according to a transmission mode according to an embodiment of the present disclosure.
  • FIG 10 illustrates three cast types according to an embodiment of the present disclosure.
  • FIG. 11 illustrates a resource unit for CBR measurement according to an embodiment of the present disclosure.
  • FIG. 12 illustrates an example of an architecture in a 5G system capable of positioning a UE connected to a Next Generation-Radio Access Network (NG-RAN) or E-UTRAN according to an embodiment of the present disclosure.
  • NG-RAN Next Generation-Radio Access Network
  • E-UTRAN E-UTRAN
  • FIG. 13 illustrates an implementation example of a network for measuring a location of a UE according to an embodiment of the present disclosure.
  • LTP LTE Positioning Protocol
  • NRPPa NR Positioning Protocol A
  • FIG. 16 is a diagram for explaining an Observed Time Difference Of Arrival (OTDOA) positioning method according to an embodiment of the present disclosure.
  • OTDOA Observed Time Difference Of Arrival
  • 17 is a diagram for explaining a method of operating a terminal according to an embodiment of the present disclosure.
  • FIG. 18 shows a communication system 1 according to an embodiment of the present disclosure.
  • FIG. 19 shows a wireless device according to an embodiment of the present disclosure.
  • FIG. 20 shows a signal processing circuit for a transmission signal according to an embodiment of the present disclosure.
  • 21 shows a wireless device according to an embodiment of the present disclosure.
  • FIG. 22 illustrates a portable device according to an embodiment of the present disclosure.
  • FIG. 23 illustrates a vehicle or autonomous vehicle according to an embodiment of the present disclosure.
  • a or B may mean “only A”, “only B” or “both A and B”.
  • a or B in the present disclosure may be interpreted as “A and/or B”.
  • A, B or C means “only A”, “only B”, “only C”, or “any and all combinations of A, B and C ( any combination of A, B and C)”.
  • a slash (/) or comma (comma) used in this disclosure may mean “and/or”.
  • A/B can mean “A and/or B”. Accordingly, “A/B” may mean “only A”, “only B”, or “both A and B”.
  • A, B, C may mean “A, B or C”.
  • “at least one of A and B” may mean “only A”, “only B” or “both A and B”.
  • the expression “at least one of A or B” or “at least one of A and/or B” means “at least one It can be interpreted the same as "A and B (at least one of A and B) of
  • At least one of A, B and C means “only A”, “only B”, “only C", or “A, B and C” It may mean “any combination of A, B and C”. Also, “at least one of A, B or C” or “at least one of A, B and/or C” means It can mean “at least one of A, B and C”.
  • parentheses used in the present disclosure may mean “for example”. Specifically, when indicated as “control information (PDCCH)”, “PDCCH” may be suggested as an example of “control information”. In other words, “control information” of the present disclosure is not limited to “PDCCH”, and “PDDCH” may be suggested as an example of "control information”. Also, even when displayed as “control information (ie, PDCCH)”, “PDCCH” may be suggested as an example of “control information”.
  • a higher layer parameter may be a parameter set for a terminal, previously set, or previously defined.
  • the base station or network may transmit higher layer parameters to the terminal.
  • higher layer parameters may be transmitted through radio resource control (RRC) signaling or medium access control (MAC) signaling.
  • RRC radio resource control
  • MAC medium access control
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • CDMA may be implemented with a radio technology such as universal terrestrial radio access (UTRA) or CDMA2000.
  • TDMA may be implemented with a radio technology such as global system for mobile communications (GSM)/general packet radio service (GPRS)/enhanced data rates for GSM evolution (EDGE).
  • GSM global system for mobile communications
  • GPRS general packet radio service
  • EDGE enhanced data rates for GSM evolution
  • OFDMA may be implemented with a wireless technology such as institute of electrical and electronics engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, evolved UTRA (E-UTRA), and the like.
  • IEEE 802.16m is an evolution of IEEE 802.16e, and provides backward compatibility with a system based on IEEE 802.16e.
  • UTRA is part of the universal mobile telecommunications system (UMTS).
  • 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of evolved UMTS (E-UMTS) that uses evolved-UMTS terrestrial radio access (E-UTRA), adopting OFDMA in downlink and SC in uplink -Adopt FDMA.
  • LTE-A (advanced) is an evolution of 3GPP LTE.
  • 5G NR a successor to LTE-A, is a new clean-slate mobile communication system with characteristics such as high performance, low latency, and high availability.
  • 5G NR can utilize all available spectrum resources, including low-frequency bands below 1 GHz, medium-frequency bands between 1 GHz and 10 GHz, and high-frequency (millimeter wave) bands above 24 GHz.
  • 5G NR is mainly described, but the technical idea according to an embodiment of the present disclosure is not limited thereto.
  • wireless communication standard documents published before the filing of the present disclosure may be referred to.
  • the following documents may be referenced.
  • UE User Equipment
  • PDCP Packet Data Convergence Protocol
  • RRC Radio Resource Control
  • 3GPP NR e.g. 5G
  • UE User Equipment
  • PDCP Packet Data Convergence Protocol
  • RRC Radio Resource Control
  • SDAP Service Data Adaptation Protocol
  • FIG. 1 shows the structure of an NR system according to an embodiment of the present disclosure.
  • FIG. 1 may be combined with various embodiments of the present disclosure.
  • a Next Generation - Radio Access Network may include a base station 20 that provides user plane and control plane protocol termination to a terminal 10 .
  • the base station 20 may include a next generation-Node B (gNB) and/or an evolved-NodeB (eNB).
  • the terminal 10 may be fixed or mobile, and other terms such as MS (Mobile Station), UT (User Terminal), SS (Subscriber Station), MT (Mobile Terminal), and wireless device (Wireless Device) can be called
  • a base station may be a fixed station that communicates with the terminal 10, and may be called other terms such as a base transceiver system (BTS) and an access point.
  • BTS base transceiver system
  • the embodiment of FIG. 1 illustrates a case including only gNB.
  • the base stations 20 may be connected to each other through an Xn interface.
  • the base station 20 may be connected to a 5G Core Network (5GC) through an NG interface.
  • the base station 20 may be connected to an access and mobility management function (AMF) 30 through an NG-C interface, and may be connected to a user plane function (UPF) 30 through an NG-U interface.
  • AMF access and mobility management function
  • UPF user plane function
  • FIG. 2 shows functional division between NG-RAN and 5GC, according to an embodiment of the present disclosure.
  • FIG. 2 may be combined with various embodiments of the present disclosure.
  • the gNB is inter-cell radio resource management (Inter Cell RRM), radio bearer management (RB control), connection mobility control (Connection Mobility Control), radio admission control (Radio Admission Control), measurement setup and provision (Measurement configuration & provision) and dynamic resource allocation.
  • AMF may provide functions such as Non Access Stratum (NAS) security and idle state mobility processing.
  • the UPF may provide functions such as mobility anchoring and PDU (Protocol Data Unit) processing.
  • Session Management Function (SMF) may provide functions such as terminal IP (Internet Protocol) address allocation and PDU session control.
  • the layers of the Radio Interface Protocol between the terminal and the network are based on the lower three layers of the Open System Interconnection (OSI) standard model, which is widely known in communication systems, It can be divided into L2 (second layer) and L3 (third layer).
  • OSI Open System Interconnection
  • the physical layer belonging to the first layer provides an information transfer service using a physical channel
  • the RRC (Radio Resource Control) layer located in the third layer provides radio resources between the terminal and the network. plays a role in controlling To this end, the RRC layer exchanges RRC messages between the terminal and the base station.
  • FIG 3 illustrates a radio protocol architecture according to an embodiment of the present disclosure.
  • FIG. 3 may be combined with various embodiments of the present disclosure. Specifically, (a) of FIG. 3 shows a radio protocol structure for a user plane, and (b) of FIG. 3 shows a radio protocol structure for a control plane.
  • the user plane is a protocol stack for user data transmission
  • the control plane is a protocol stack for control signal transmission.
  • a physical layer provides an information transmission service to an upper layer using a physical channel.
  • the physical layer is connected to a medium access control (MAC) layer, which is an upper layer, through a transport channel.
  • MAC medium access control
  • Data moves between the MAC layer and the physical layer through the transport channel.
  • Transmission channels are classified according to how and with what characteristics data is transmitted through the air interface.
  • the physical channel may be modulated using OFDM (Orthogonal Frequency Division Multiplexing) and utilizes time and frequency as radio resources.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the MAC layer provides a service to a radio link control (RLC) layer, which is an upper layer, through a logical channel.
  • RLC radio link control
  • the MAC layer provides a mapping function from multiple logical channels to multiple transport channels.
  • the MAC layer provides a logical channel multiplexing function by mapping a plurality of logical channels to a single transport channel.
  • the MAC sublayer provides data transmission services on logical channels.
  • the RLC layer performs concatenation, segmentation, and reassembly of RLC Service Data Units (SDUs).
  • SDUs RLC Service Data Units
  • the RLC layer uses transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (Acknowledged Mode).
  • TM transparent mode
  • UM unacknowledged mode
  • AM acknowledged mode
  • AM RLC provides error correction through automatic repeat request (ARQ).
  • the Radio Resource Control (RRC) layer is defined only in the control plane.
  • the RRC layer is responsible for control of logical channels, transport channels, and physical channels in relation to configuration, re-configuration, and release of radio bearers.
  • RB means a logical path provided by the first layer (physical layer or PHY layer) and the second layer (MAC layer, RLC layer, Packet Data Convergence Protocol (PDCP) layer) for data transfer between the terminal and the network.
  • MAC layer physical layer or PHY layer
  • RLC layer Packet Data Convergence Protocol (PDCP) layer
  • the functions of the PDCP layer in the user plane include delivery of user data, header compression and ciphering.
  • the functions of the PDCP layer in the control plane include delivery of control plane data and encryption/integrity protection.
  • the Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane.
  • SDAP layer performs mapping between QoS flows and data radio bearers, marking QoS flow identifiers (IDs) in downlink and uplink packets, and the like.
  • IDs QoS flow identifiers
  • Establishing an RB means a process of defining characteristics of a radio protocol layer and a channel and setting specific parameters and operation methods to provide a specific service.
  • RBs can be further divided into two types: Signaling Radio Bearer (SRB) and Data Radio Bearer (DRB).
  • SRB Signaling Radio Bearer
  • DRB Data Radio Bearer
  • the terminal When an RRC connection is established between the RRC layer of the terminal and the RRC layer of the base station, the terminal is in the RRC_CONNECTED state, otherwise it is in the RRC_IDLE state.
  • the RRC_INACTIVE state is additionally defined, and the UE in the RRC_INACTIVE state can release the connection with the base station while maintaining the connection with the core network.
  • a downlink transmission channel for transmitting data from a network to a terminal includes a broadcast channel (BCH) for transmitting system information and a downlink shared channel (SCH) for transmitting user traffic or control messages.
  • Traffic or control messages of a downlink multicast or broadcast service may be transmitted through a downlink SCH or may be transmitted through a separate downlink multicast channel (MCH).
  • an uplink transmission channel for transmitting data from a terminal to a network includes a random access channel (RACH) for transmitting an initial control message and an uplink shared channel (SCH) for transmitting user traffic or control messages.
  • RACH random access channel
  • Logical channels located above transport channels and mapped to transport channels include BCCH (Broadcast Control Channel), PCCH (Paging Control Channel), CCCH (Common Control Channel), MCCH (Multicast Control Channel), MTCH (Multicast Traffic Channel) Channel), etc.
  • BCCH Broadcast Control Channel
  • PCCH Paging Control Channel
  • CCCH Common Control Channel
  • MCCH Multicast Control Channel
  • MTCH Multicast Traffic Channel
  • a physical channel is composed of several OFDM symbols in the time domain and several sub-carriers in the frequency domain.
  • One sub-frame is composed of a plurality of OFDM symbols in the time domain.
  • a resource block is a resource allocation unit and is composed of a plurality of OFDM symbols and a plurality of sub-carriers.
  • each subframe may use specific subcarriers of specific OFDM symbols (eg, a first OFDM symbol) of the corresponding subframe for a Physical Downlink Control Channel (PDCCH), that is, an L1/L2 control channel.
  • PDCCH Physical Downlink Control Channel
  • TTI Transmission Time Interval
  • FIG. 4 shows a structure of a radio frame of NR according to an embodiment of the present disclosure.
  • FIG. 4 may be combined with various embodiments of the present disclosure.
  • radio frames can be used in uplink and downlink transmission in NR.
  • a radio frame has a length of 10 ms and may be defined as two 5 ms half-frames (Half-Frame, HF).
  • a half-frame may include five 1ms subframes (Subframes, SFs).
  • a subframe may be divided into one or more slots, and the number of slots in a subframe may be determined according to a subcarrier spacing (SCS).
  • SCS subcarrier spacing
  • Each slot may include 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP).
  • CP cyclic prefix
  • each slot may include 14 symbols.
  • each slot may include 12 symbols.
  • the symbol may include an OFDM symbol (or CP-OFDM symbol), a Single Carrier-FDMA (SC-FDMA) symbol (or a Discrete Fourier Transform-spread-OFDM (DFT-s-OFDM) symbol).
  • OFDM symbol or CP-OFDM symbol
  • SC-FDMA Single Carrier-FDMA
  • DFT-s-OFDM Discrete Fourier Transform-spread-OFDM
  • Table 1 below shows the number of symbols per slot (N slot symb ), the number of slots per frame (N frame,u slot ) and the number of slots per subframe ( N subframe, u slot ) is exemplified.
  • Table 2 illustrates the number of symbols per slot, the number of slots per frame, and the number of slots per subframe according to the SCS when the extended CP is used.
  • OFDM A numerology
  • SCS SCS
  • CP length CP length
  • TU Time Unit
  • multiple numerologies or SCSs to support various 5G services can be supported. For example, when the SCS is 15 kHz, wide area in traditional cellular bands can be supported, and when the SCS is 30 kHz/60 kHz, dense-urban, lower latency latency and wider carrier bandwidth may be supported. When the SCS is 60 kHz or higher, a bandwidth greater than 24.25 GHz may be supported to overcome phase noise.
  • An NR frequency band may be defined as two types of frequency ranges.
  • the two types of frequency ranges may be FR1 and FR2.
  • the number of frequency ranges may be changed, and for example, the two types of frequency ranges may be shown in Table 3 below.
  • FR1 may mean "sub 6 GHz range”
  • FR2 may mean “above 6 GHz range” and may be called millimeter wave (mmW).
  • mmW millimeter wave
  • FR1 may include a band of 410 MHz to 7125 MHz as shown in Table 4 below. That is, FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher. For example, a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher included in FR1 may include an unlicensed band. The unlicensed band may be used for various purposes, and may be used, for example, for vehicle communication (eg, autonomous driving).
  • FIG. 5 illustrates a slot structure of an NR frame according to an embodiment of the present disclosure.
  • FIG. 5 may be combined with various embodiments of the present disclosure.
  • a slot includes a plurality of symbols in the time domain. For example, in the case of a normal CP, one slot includes 14 symbols, but in the case of an extended CP, one slot may include 12 symbols. Alternatively, in the case of a normal CP, one slot includes 7 symbols, but in the case of an extended CP, one slot may include 6 symbols.
  • a carrier includes a plurality of subcarriers in the frequency domain.
  • a resource block (RB) may be defined as a plurality of (eg, 12) consecutive subcarriers in the frequency domain.
  • a bandwidth part (BWP) may be defined as a plurality of consecutive (P)RBs ((Physical) Resource Blocks) in the frequency domain, and may correspond to one numerology (eg, SCS, CP length, etc.) there is.
  • a carrier may include up to N (eg, 5) BWPs. Data communication may be performed through an activated BWP.
  • Each element may be referred to as a resource element (RE) in the resource grid, and one complex symbol may be mapped.
  • RE resource element
  • a radio interface between a terminal and a terminal or a radio interface between a terminal and a network may be composed of an L1 layer, an L2 layer, and an L3 layer.
  • the L1 layer may mean a physical layer.
  • the L2 layer may mean at least one of a MAC layer, an RLC layer, a PDCP layer, and an SDAP layer.
  • the L3 layer may mean an RRC layer.
  • bandwidth part BWP
  • carrier a bandwidth part (BWP) and a carrier
  • a bandwidth part may be a contiguous set of physical resource blocks (PRBs) in a given numerology.
  • PRB physical resource blocks
  • a PRB may be selected from a contiguous subset of common resource blocks (CRBs) for a given numerology on a given carrier.
  • CRBs common resource blocks
  • the reception bandwidth and transmission bandwidth of the terminal do not need to be as large as the cell bandwidth, and the reception bandwidth and transmission bandwidth of the terminal can be adjusted.
  • the network/base station may notify the terminal of bandwidth adjustment.
  • the terminal may receive information/configuration for bandwidth adjustment from the network/base station.
  • the terminal may perform bandwidth adjustment based on the received information/configuration.
  • the bandwidth adjustment may include reducing/expanding the bandwidth, changing the location of the bandwidth, or changing the subcarrier spacing of the bandwidth.
  • bandwidth may be reduced during periods of low activity to save power.
  • the location of the bandwidth may move in the frequency domain.
  • the location of the bandwidth can be moved in the frequency domain to increase scheduling flexibility.
  • subcarrier spacing of the bandwidth may be changed.
  • the subcarrier spacing of the bandwidth can be changed to allow for different services.
  • a subset of the total cell bandwidth of a cell may be referred to as a Bandwidth Part (BWP).
  • BA may be performed by the base station/network setting a BWP to the terminal and notifying the terminal of the currently active BWP among the set BWPs of the base station/network.
  • the BWP may be at least one of an active BWP, an initial BWP, and/or a default BWP.
  • the UE may not monitor downlink radio link quality in a DL BWP other than an active DL BWP on a primary cell (PCell).
  • the UE may not receive PDCCH, PDSCH or CSI-RS (except for RRM) outside of active DL BWP.
  • the UE may not trigger Channel State Information (CSI) reporting for inactive DL BWP.
  • the UE may not transmit a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH) outside of an active UL BWP.
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • the initial BWP may be given as a set of consecutive RBs for remaining minimum system information (RMSI) control resource set (CORESET) (set by PBCH).
  • RMSI remaining minimum system information
  • CORESET control resource set
  • the initial BWP may be given by a system information block (SIB) for a random access procedure.
  • SIB system information block
  • a default BWP may be set by higher layers.
  • the initial value of the default BWP may be an initial DL BWP.
  • DCI downlink control information
  • BWP may be defined for SL.
  • the same SL BWP can be used for transmit and receive.
  • a transmitting terminal can transmit an SL channel or SL signal on a specific BWP
  • a receiving terminal can receive an SL channel or SL signal on the specific BWP.
  • SL BWP may be defined separately from Uu BWP, and SL BWP may have separate configuration signaling from Uu BWP.
  • the terminal may receive configuration for SL BWP from the base station/network.
  • SL BWP may be set (in advance) for an out-of-coverage NR V2X terminal and an RRC_IDLE terminal within a carrier. For a UE in RRC_CONNECTED mode, at least one SL BWP may be activated within a carrier.
  • FIG 6 shows an example of BWP according to an embodiment of the present disclosure.
  • FIG. 6 may be combined with various embodiments of the present disclosure. In the embodiment of FIG. 6 , it is assumed that there are three BWPs.
  • a common resource block may be a carrier resource block numbered from one end of a carrier band to the other end.
  • a PRB may be a numbered resource block within each BWP.
  • Point A may indicate a common reference point for the resource block grid.
  • BWP can be set by point A, offset from point A (NstartBWP) and bandwidth (NsizeBWP).
  • point A may be the external reference point of the carrier's PRB to which subcarrier 0 of all numerologies (eg, all numerologies supported by the network on that carrier) are aligned.
  • the offset may be the PRB interval between point A and the lowest subcarrier in a given numerology.
  • the bandwidth may be the number of PRBs in a given numerology.
  • V2X Vehicle-to-everything
  • SL sidelink
  • V2X or SL communication will be described.
  • FIG. 7 illustrates a radio protocol architecture for SL communication according to an embodiment of the present disclosure.
  • FIG. 7 may be combined with various embodiments of the present disclosure. Specifically, (a) of FIG. 7 shows a user plane protocol stack, and (b) of FIG. 7 shows a control plane protocol stack.
  • SL synchronization signal Sidelink Synchronization Signal, SLSS
  • SLSS Segment Synchronization Signal
  • the SLSS is a SL-specific sequence and may include a Primary Sidelink Synchronization Signal (PSSS) and a Secondary Sidelink Synchronization Signal (SSSS).
  • PSSS may be referred to as a sidelink primary synchronization signal (S-PSS)
  • S-SSS sidelink secondary synchronization signal
  • S-SSS sidelink secondary synchronization signal
  • length-127 M-sequences can be used for S-PSS
  • length-127 Gold-sequences can be used for S-SSS.
  • the UE can detect an initial signal using S-PSS and acquire synchronization.
  • the terminal may obtain detailed synchronization using S-PSS and S-SSS and detect a synchronization signal ID.
  • PSBCH Physical Sidelink Broadcast Channel
  • PSBCH Physical Sidelink Broadcast Channel
  • the basic information includes information related to SLSS, duplex mode (DM), TDD UL/Time Division Duplex Uplink/Downlink (TDD UL/DL) configuration, resource pool related information, type of application related to SLSS, It may be a subframe offset, broadcast information, and the like.
  • the payload size of PSBCH may be 56 bits including a 24-bit CRC.
  • S-PSS, S-SSS, and PSBCH may be included in a block format (eg, SL SS (Synchronization Signal) / PSBCH block, hereinafter, S-SSB (Sidelink-Synchronization Signal Block)) supporting periodic transmission.
  • the S-SSB may have the same numerology (ie, SCS and CP length) as a Physical Sidelink Control Channel (PSCCH)/Physical Sidelink Shared Channel (PSSCH) in a carrier, and the transmission bandwidth may be a (pre)set SL Sidelink BWP (Sidelink Channel). BWP).
  • the bandwidth of the S-SSB may be 11 Resource Blocks (RBs).
  • PSBCH may span 11 RBs.
  • the frequency position of the S-SSB may be set (in advance). Therefore, the UE does not need to perform hypothesis detection in frequency to discover the S-SSB in the carrier.
  • the UE may generate an S-SS/PSBCH block (ie, S-SSB), and the UE may generate the S-SS/PSBCH block (ie, S-SSB) on a physical resource. It can be mapped to and transmitted.
  • TDMA time division multiple access
  • FDMA frequency division multiples access
  • ISI Inter Symbol Interference
  • ICI Inter Carrier Interference
  • SLSS sidelink synchronization signal
  • MIB-SL-V2X master information block-sidelink-V2X
  • RLC radio link control
  • FIG. 8 shows a synchronization source or synchronization reference of V2X according to an embodiment of the present disclosure.
  • FIG. 8 may be combined with various embodiments of the present disclosure.
  • a terminal in V2X, is synchronized directly to global navigation satellite systems (GNSS), or indirectly synchronized to GNSS through a terminal directly synchronized to GNSS (within network coverage or outside network coverage).
  • GNSS global navigation satellite systems
  • the UE can calculate the DFN and subframe number using Coordinated Universal Time (UTC) and (pre)set Direct Frame Number (DFN) offset.
  • UTC Coordinated Universal Time
  • DFN Direct Frame Number
  • the terminal may be directly synchronized with the base station or synchronized with another terminal that is time/frequency synchronized with the base station.
  • the base station may be an eNB or gNB.
  • the terminal may receive synchronization information provided by a base station and be directly synchronized with the base station. After that, the terminal may provide synchronization information to other neighboring terminals.
  • the base station timing is set as a synchronization criterion, the UE uses a cell associated with a corresponding frequency (when it is within cell coverage at the frequency), a primary cell, or a serving cell (when it is outside cell coverage at the frequency) for synchronization and downlink measurement. ) can be followed.
  • a base station may provide synchronization settings for carriers used for V2X or SL communication.
  • the terminal may follow the synchronization setting received from the base station. If the terminal did not detect any cell on the carrier used for the V2X or SL communication and did not receive synchronization settings from the serving cell, the terminal may follow the preset synchronization settings.
  • the terminal may be synchronized with other terminals that do not directly or indirectly acquire synchronization information from the base station or GNSS.
  • Synchronization source and preference may be set in advance for the terminal.
  • the synchronization source and preference may be set through a control message provided by the base station.
  • a SL sync source may be associated with a sync priority.
  • a relationship between synchronization sources and synchronization priorities may be defined as shown in Table 6 or Table 7.
  • Table 6 or Table 7 is only an example, and the relationship between synchronization sources and synchronization priorities may be defined in various forms.
  • a base station may include at least one of a gNB and an eNB.
  • a UE may derive its transmission timing from an available synchronization criterion having the highest priority.
  • the terminal may (re)select a synchronization reference, and the terminal may acquire synchronization from the synchronization reference.
  • the UE may perform SL communication (eg, PSCCH/PSSCH transmission/reception, PSFCH (Physical Sidelink Feedback Channel) transmission/reception, S-SSB transmission/reception, reference signal transmission/reception, etc.) based on the acquired synchronization.
  • SL communication eg, PSCCH/PSSCH transmission/reception, PSFCH (Physical Sidelink Feedback Channel) transmission/reception, S-SSB transmission/reception, reference signal transmission/reception, etc.
  • FIG 9 illustrates a procedure for a terminal to perform V2X or SL communication according to a transmission mode according to an embodiment of the present disclosure.
  • the transmission mode may be referred to as a mode or a resource allocation mode.
  • a transmission mode in LTE may be referred to as an LTE transmission mode
  • a transmission mode in NR may be referred to as an NR resource allocation mode.
  • (a) of FIG. 9 shows a terminal operation related to LTE transmission mode 1 or LTE transmission mode 3.
  • (a) of FIG. 9 shows a UE operation related to NR resource allocation mode 1.
  • LTE transmission mode 1 may be applied to general SL communication
  • LTE transmission mode 3 may be applied to V2X communication.
  • (b) of FIG. 9 shows a terminal operation related to LTE transmission mode 2 or LTE transmission mode 4.
  • (b) of FIG. 9 shows UE operation related to NR resource allocation mode 2.
  • the base station may schedule SL resources to be used by the terminal for SL transmission.
  • the base station may transmit information related to SL resources and/or information related to UL resources to the first terminal.
  • the UL resource may include a PUCCH resource and/or a PUSCH resource.
  • the UL resource may be a resource for reporting SL HARQ feedback to the base station.
  • the first terminal may receive information related to dynamic grant (DG) resources and/or information related to configured grant (CG) resources from the base station.
  • CG resources may include CG type 1 resources or CG type 2 resources.
  • the DG resource may be a resource configured/allocated by the base station to the first terminal through downlink control information (DCI).
  • the CG resource may be a (periodic) resource configured/allocated by the base station to the first terminal through a DCI and/or RRC message.
  • the base station may transmit an RRC message including information related to the CG resource to the first terminal.
  • the base station may transmit an RRC message including information related to the CG resource to the first terminal, and the base station transmits a DCI related to activation or release of the CG resource. It can be transmitted to the first terminal.
  • the first terminal may transmit a PSCCH (eg, Sidelink Control Information (SCI) or 1st-stage SCI) to the second terminal based on the resource scheduling.
  • the first terminal may transmit a PSSCH (eg, 2nd-stage SCI, MAC PDU, data, etc.) related to the PSCCH to the second terminal.
  • the first terminal may receive the PSFCH related to the PSCCH/PSSCH from the second terminal. For example, HARQ feedback information (eg, NACK information or ACK information) may be received from the second terminal through the PSFCH.
  • the first terminal may transmit / report HARQ feedback information to the base station through PUCCH or PUSCH.
  • the HARQ feedback information reported to the base station may be information that the first terminal generates based on the HARQ feedback information received from the second terminal.
  • the HARQ feedback information reported to the base station may be information generated by the first terminal based on a rule set in advance.
  • the DCI may be a DCI for SL scheduling.
  • the format of the DCI may be DCI format 3_0 or DCI format 3_1. Table 8 shows an example of DCI for SL scheduling.
  • the terminal can determine an SL transmission resource within an SL resource set by the base station / network or a preset SL resource there is.
  • the set SL resource or the preset SL resource may be a resource pool.
  • the terminal may autonomously select or schedule resources for SL transmission.
  • the terminal may perform SL communication by selecting a resource by itself within a configured resource pool.
  • the terminal may select a resource by itself within a selection window by performing a sensing and resource (re)selection procedure.
  • the sensing may be performed in units of subchannels.
  • the first terminal that has selected a resource within the resource pool by itself can transmit a PSCCH (eg, Sidelink Control Information (SCI) or 1st-stage SCI) to the second terminal using the resource.
  • a PSCCH eg, Sidelink Control Information (SCI) or 1st-stage SCI
  • the first terminal may transmit a PSSCH (eg, 2nd-stage SCI, MAC PDU, data, etc.) related to the PSCCH to the second terminal.
  • the first terminal may receive the PSFCH related to the PSCCH/PSSCH from the second terminal.
  • UE 1 may transmit SCI to UE 2 on PSCCH.
  • UE 1 may transmit two consecutive SCI (eg, 2-stage SCI) to UE 2 on PSCCH and/or PSSCH.
  • UE 2 may decode two consecutive SCIs (eg, 2-stage SCI) in order to receive the PSSCH from UE 1.
  • SCI transmitted on PSCCH may be referred to as a 1st SCI, 1st SCI, 1st-stage SCI or 1st-stage SCI format
  • SCI transmitted on PSSCH is 2nd SCI, 2nd SCI, 2nd-stage SCI or It may be referred to as a 2nd-stage SCI format
  • the 1st-stage SCI format may include SCI format 1-A
  • the 2nd-stage SCI format may include SCI format 2-A and/or SCI format 2-B.
  • Table 9 shows an example of the 1st-stage SCI format.
  • Table 10 shows an example of a 2nd-stage SCI format.
  • the first terminal may receive the PSFCH based on Table 11.
  • UE 1 and UE 2 may determine PSFCH resources based on Table 11, and UE 2 may transmit HARQ feedback to UE 1 using the PSFCH resource.
  • the first terminal may transmit SL HARQ feedback to the base station through PUCCH and/or PUSCH based on Table 12.
  • FIG 10 illustrates three cast types according to an embodiment of the present disclosure.
  • FIG. 10 may be combined with various embodiments of the present disclosure.
  • FIG. 10(a) shows broadcast type SL communication
  • FIG. 10(b) shows unicast type SL communication
  • FIG. 10(c) shows groupcast type SL communication.
  • a terminal may perform one-to-one communication with another terminal.
  • SL communication of the group cast type a terminal may perform SL communication with one or more terminals in a group to which it belongs.
  • SL groupcast communication may be replaced with SL multicast communication, SL one-to-many communication, and the like.
  • HARQ hybrid automatic repeat request
  • SL HARQ feedback can be enabled for unicast.
  • non-Code Block Group (non-CBG) operation if the receiving terminal decodes a PSCCH targeting the receiving terminal, and the receiving terminal successfully decodes a transport block related to the PSCCH, the receiving terminal HARQ-ACK can be generated. And, the receiving terminal may transmit HARQ-ACK to the transmitting terminal.
  • the receiving terminal may generate HARQ-NACK. And, the receiving terminal may transmit HARQ-NACK to the transmitting terminal.
  • SL HARQ feedback may be enabled for groupcast.
  • two HARQ feedback options can be supported for groupcast.
  • Groupcast Option 1 If the receiving terminal fails to decode a transport block related to the PSCCH after the receiving terminal decodes the PSCCH targeting the receiving terminal, the receiving terminal transmits HARQ-NACK through the PSFCH. It can be transmitted to the transmitting terminal. On the other hand, if the receiving terminal decodes a PSCCH targeting the receiving terminal and the receiving terminal successfully decodes a transport block related to the PSCCH, the receiving terminal may not transmit HARQ-ACK to the transmitting terminal.
  • Groupcast option 2 If the receiving terminal fails to decode a transport block related to the PSCCH after the receiving terminal decodes the PSCCH targeting the receiving terminal, the receiving terminal transmits HARQ-NACK through the PSFCH. It can be transmitted to the transmitting terminal. And, when the receiving terminal decodes the PSCCH targeting the receiving terminal and the receiving terminal successfully decodes the transport block related to the PSCCH, the receiving terminal may transmit HARQ-ACK to the transmitting terminal through the PSFCH.
  • all terminals performing groupcast communication may share PSFCH resources.
  • UEs belonging to the same group may transmit HARQ feedback using the same PSFCH resource.
  • each terminal performing groupcast communication may use different PSFCH resources for HARQ feedback transmission.
  • UEs belonging to the same group may transmit HARQ feedback using different PSFCH resources.
  • HARQ-ACK may be referred to as ACK, ACK information, or positive-ACK information
  • HARQ-NACK may be referred to as NACK, NACK information, or negative-ACK information.
  • SL measurement and reporting may be considered in SL.
  • a receiving terminal may receive a reference signal from a transmitting terminal, and the receiving terminal may measure a channel state of the transmitting terminal based on the reference signal. And, the receiving terminal may report channel state information (CSI) to the transmitting terminal.
  • CSI channel state information
  • SL-related measurement and reporting may include measurement and reporting of CBR and reporting of location information.
  • CSI Channel Status Information
  • PMI Precoding Matrix Index
  • RI Rank Indicator
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal Received Quality
  • Path Gain pathgain/pathloss
  • SRI Sounding Reference Symbols
  • Resource Indicator Resource Indicator
  • CRI CSI-RS Resource Indicator
  • interference condition vehicle motion, and the like.
  • a transmitting terminal may transmit a CSI-RS to a receiving terminal, and the receiving terminal may measure CQI or RI using the CSI-RS.
  • the CSI-RS may be referred to as an SL CSI-RS.
  • the CSI-RS may be confined within PSSCH transmission.
  • the transmitting terminal may transmit the CSI-RS to the receiving terminal by including the CSI-RS on the PSSCH resource.
  • SL congestion control sidelink congestion control
  • the terminal determines whether the energy measured in a unit time/frequency resource is equal to or higher than a certain level, and determines the amount and frequency of its own transmission resources according to the ratio of the unit time/frequency resource in which energy equal to or higher than a certain level is observed.
  • a ratio of time/frequency resources in which energy of a certain level or higher is observed may be defined as a channel busy ratio (CBR).
  • the UE may measure the CBR for each channel/frequency. Additionally, the UE may transmit the measured CBR to the network/base station.
  • FIG. 11 illustrates a resource unit for CBR measurement according to an embodiment of the present disclosure.
  • the embodiment of FIG. 11 may be combined with various embodiments of the present disclosure.
  • CBR is a result of a UE measuring a Received Signal Strength Indicator (RSSI) in units of subchannels for a specific period (eg, 100 ms), and the RSSI measurement result value is a sub-value having a value greater than or equal to a preset threshold. It may mean the number of channels. Alternatively, the CBR may mean a ratio of subchannels having a value equal to or greater than a preset threshold among subchannels during a specific period. For example, in the embodiment of FIG.
  • RSSI Received Signal Strength Indicator
  • the CBR may mean a ratio of hatched subchannels during a 100 ms interval. Additionally, the terminal may report the CBR to the base station.
  • the UE can perform one CBR measurement for one resource pool.
  • the PSFCH resource may be excluded from the CBR measurement.
  • the terminal may measure channel occupancy ratio (CR). Specifically, the terminal measures the CBR, and the terminal measures the maximum value (CRlimitk) of the channel occupancy ratio (Channel occupancy ratio k, CRk) that traffic corresponding to each priority (eg, k) can occupy according to the CBR. ) can be determined. For example, the terminal may derive the maximum value (CRlimitk) of the channel occupancy for the priority of each traffic based on a predetermined table of CBR measurement values. For example, in the case of traffic having a relatively high priority, the terminal may derive a maximum value of a relatively large channel occupancy.
  • CR channel occupancy ratio
  • the UE may perform congestion control by limiting the sum of channel occupancy rates of traffics whose priority k is lower than i to a predetermined value or less. According to this method, a stronger channel occupancy limit may be applied to traffic having a relatively lower priority.
  • the terminal may perform SL congestion control using methods such as transmission power size adjustment, packet drop, retransmission decision, and transmission RB size adjustment (MCS adjustment).
  • MCS adjustment transmission RB size adjustment
  • Table 13 shows an example of SL CBR and SL RSSI.
  • the slot index may be based on a physical slot index.
  • Table 14 shows an example of SL CR (Channel Occupancy Ratio).
  • FIG. 12 illustrates an example of an architecture in a 5G system capable of positioning a UE connected to a Next Generation-Radio Access Network (NG-RAN) or an E-UTRAN according to an embodiment of the present disclosure.
  • NG-RAN Next Generation-Radio Access Network
  • E-UTRAN E-UTRAN
  • the AMF receives a request for a location service related to a specific target UE from another entity such as a Gateway Mobile Location Center (GMLC), or AMF itself starts a location service on behalf of a specific target UE. can decide to do it. Then, the AMF may transmit a location service request to a Location Management Function (LMF).
  • LMF Location Management Function
  • the LMF receiving the location service request may process the location service request and return a processing result including an estimated location of the UE to the AMF.
  • the AMF may transfer the processing result received from the LMF to the other entity.
  • a new generation evolved-NB (ng-eNB) and gNB are network elements of NG-RAN that can provide measurement results for position estimation, and can measure radio signals for a target UE and deliver the result to the LMF.
  • the ng-eNB can control several transmission points (TPs) such as remote radio heads or PRS-dedicated TPs that support a Positioning Reference Signal (PRS) based beacon system for E-UTRA.
  • TPs transmission points
  • PRS Positioning Reference Signal
  • the LMF is connected to an Enhanced Serving Mobile Location Center (E-SMLC), and the E-SMLC enables the LMF to access the E-UTRAN.
  • E-SMLC uses OTDOA, which is one of the positioning methods of E-UTRAN, by using downlink measurements obtained by a target UE through a signal transmitted by an LMF from PRS-dedicated TPs in an eNB and/or E-UTRAN. (Observed Time Difference Of Arrival) can be supported.
  • the LMF may be connected to a SUPL Location Platform (SLP).
  • the LMF can support and manage different location services for target UEs.
  • the LMF may interact with the serving ng-eNB or serving gNB for the target UE to obtain the location measurement of the UE.
  • the LMF selects a positioning method based on a Location Service (LCS) client type, a required Quality of Service (QoS), UE positioning capabilities, gNB positioning capabilities, and ng-eNB positioning capabilities. and may apply this positioning method to the serving gNB and/or the serving ng-eNB.
  • the LMF can determine the location estimate for the target UE and additional information such as the accuracy of the location estimate and velocity.
  • the SLP is a Secure User Plane Location (SUPL) entity responsible for positioning through a user plane.
  • SUPL Secure User Plane Location
  • the UEs can receive downlink data via sources such as NG-RAN and E-UTRAN, different Global Navigation Satellite Systems (GNSS), Terrestrial Beacon Systems (TBS), Wireless Local Access Network (WLAN) access points, Bluetooth beacons and UE barometric pressure sensors.
  • Link signals can be measured.
  • the UE may include an LCS application, and may access the LCS application through communication with a network to which the UE is connected or another application included in the UE.
  • the LCS application may include the measurement and calculation functions necessary to determine the location of the UE.
  • the UE may include an independent positioning function such as Global Positioning System (GPS), and may report the location of the UE independently of NG-RAN transmission. Positioning information obtained independently may be used as auxiliary information of positioning information obtained from a network.
  • GPS Global Positioning System
  • FIG. 13 illustrates an implementation example of a network for measuring a location of a UE according to an embodiment of the present disclosure.
  • CM-IDLE Connection Management - IDLE
  • the AMF When the UE is in CM-IDLE (Connection Management - IDLE) state, when the AMF receives a location service request, the AMF establishes a signaling connection with the UE and uses a network trigger service to allocate a specific serving gNB or ng-eNB. can request This operation process is omitted in FIG. 13 . That is, in FIG. 13 , it may be assumed that the UE is in a connected mode. However, the signaling connection may be released during the positioning process by the NG-RAN for reasons such as signaling and data inactivity.
  • a 5GC entity such as GMLC may request a location service for measuring the location of a target UE from a serving AMF.
  • the serving AMF may determine that the location service for measuring the location of the target UE is required. For example, in order to measure the location of a UE for an emergency call, the serving AMF may determine to directly perform location service.
  • the AMF sends a location service request to the LMF, according to step 2, and according to step 3a, the LMF serves location procedures to obtain location measurement data or location assistance data. You can start with the serving gNB. Additionally, according to step 3b, the LMF may initiate location procedures for downlink location with the UE. For example, the LMF may transmit location assistance data (Assistance data defined in 3GPP TS 36.355) to the UE or obtain a location estimate or location measurement. Meanwhile, step 3b may be additionally performed after step 3a is performed, but may be performed instead of step 3a.
  • location assistance data Asssistance data defined in 3GPP TS 36.355
  • the LMF may provide a location service response to the AMF.
  • the location service response may include information on whether the location estimation of the UE was successful and the location estimate of the UE. Then, if the procedure of FIG. 13 is initiated by step 1a, the AMF may deliver a location service response to a 5GC entity such as GMLC, and if the procedure of FIG. For service provision, a location service response may be used.
  • LTP LTE Positioning Protocol
  • LPP PDUs may be transmitted through NAS PDUs between AMF and UE.
  • the LPP is a target device (eg, UE in the control plane or a SUPL Enabled Terminal (SET) in the user plane) and a location server (eg, LMF in the control plane or SLP in the user plane). ) can be terminated.
  • LPP messages are transparent over intermediate network interfaces using appropriate protocols such as NG Application Protocol (NGAP) over NG-Control Plane (NG-C) interfaces, NAS/RRC over LTE-Uu and NR-Uu interfaces. (Transparent) It can be delivered in the form of a PDU.
  • NGAP NG Application Protocol
  • N-C NG-Control Plane
  • NAS/RRC over LTE-Uu and NR-Uu interfaces.
  • Transparent It can be delivered in the form of a PDU.
  • the LPP protocol enables positioning for NR and LTE using multiple positioning methods.
  • the target device and the location server may exchange capability information, auxiliary data for positioning, and/or location information through the LPP protocol.
  • error information exchange and/or an LPP procedure interruption instruction may be performed through an LPP message.
  • NRPPa NR Positioning Protocol A
  • NRPPa can be used for information exchange between NG-RAN nodes and LMF.
  • NRPPa includes E-CID (Enhanced-Cell ID) for measurement transmitted from ng-eNB to LMF, data to support OTDOA positioning method, Cell-ID and Cell location ID for NR Cell ID positioning method, etc. can be exchanged
  • E-CID Enhanced-Cell ID
  • the AMF may route NRPPa PDUs based on the routing ID of the associated LMF through the NG-C interface even if there is no information on the associated NRPPa transaction.
  • the procedures of the NRPPa protocol for location and data collection can be divided into two types.
  • the first type is a UE associated procedure for delivering information (eg, location measurement information, etc.) for a specific UE
  • the second type is applicable to NG-RAN nodes and related TPs
  • This is a non-UE associated procedure for delivering information (eg, gNB/ng-eNB/TP timing information, etc.).
  • the above two types of procedures may be supported independently or simultaneously.
  • positioning methods supported by NG-RAN include GNSS, OTDOA, E-CID (enhanced cell ID), barometric pressure sensor positioning, WLAN positioning, Bluetooth positioning, TBS (terrestrial beacon system), UTDOA (Uplink Time Difference of Arrival) etc. may be present.
  • the position of the UE may be measured using any one of the above positioning methods, but the position of the UE may be measured using two or more positioning methods.
  • FIG. 16 is a diagram for explaining an OTDOA (Observed Time Difference Of Arrival) positioning method according to an embodiment of the present disclosure.
  • OTDOA Observed Time Difference Of Arrival
  • the OTDOA positioning method uses measurement timing of downlink signals received by a UE from multiple TPs including an eNB, ng-eNB and a PRS dedicated TP.
  • the UE uses the location assistance data received from the location server to measure the timing of the received downlink signals.
  • the location of the UE may be determined based on the measurement result and the geographic coordinates of neighboring TPs.
  • a UE connected to the gNB may request a measurement gap for OTDOA measurement from the TP. If the UE does not recognize a single frequency network (SFN) for at least one TP in the OTDOA auxiliary data, the UE refers to OTDOA before requesting a measurement gap to perform a Reference Signal Time Difference (RSTD) measurement.
  • SFN single frequency network
  • RSTD Reference Signal Time Difference
  • An autonomous gap may be used to acquire the SFN of a reference cell.
  • the RSTD may be defined based on the smallest relative time difference between the boundaries of two subframes each received from the reference cell and the measurement cell. That is, it may be calculated based on a relative time difference between the start time of the subframe of the reference cell closest to the start time of the subframe received from the measurement cell. Meanwhile, a reference cell may be selected by the UE.
  • TOA time of arrival
  • RSTD time of arrival
  • RSTD for two TPs may be calculated based on Equation 1.
  • ⁇ x t , y t ⁇ are the (unknown) coordinates of the target UE
  • ⁇ x i , y i ⁇ are the (known) coordinates of the TP
  • ⁇ x 1 , y 1 ⁇ may be the coordinates of the reference TP (or another TP).
  • (Ti-T1) is a transmission time offset between two TPs, which may be named “Real Time Differences” (RTDs)
  • n i , n 1 may represent values related to UE TOA measurement errors.
  • the location of the UE may be measured through geographic information of the serving ng-eNB, serving gNB and/or serving cell of the UE.
  • geographic information of the serving ng-eNB, the serving gNB, and/or the serving cell may be obtained through paging, registration, and the like.
  • the E-CID positioning method may use additional UE measurement and/or NG-RAN radio resources for improving the UE position estimation value in addition to the CID positioning method.
  • some of the same measurement methods as the measurement control system of the RRC protocol may be used, but in general, additional measurement is not performed only for the location measurement of the UE.
  • a separate measurement configuration or measurement control message may not be provided to measure the location of the UE, and the UE does not expect an additional measurement operation only for location measurement to be requested.
  • the UE may report measurement values obtained through generally measurable measurement methods.
  • the serving gNB may implement the E-CID location method using E-UTRA measurements provided from the UE.
  • measurement elements that can be used for E-CID positioning may be as follows.
  • E-UTRA RSRP Reference Signal Received Power
  • E-UTRA RSRQ Reference Signal Received Quality
  • UE E-UTRA reception-transmission time difference Rx-Tx Time difference
  • GERAN GSM EDGE Random Access Network
  • WLAN RSSI Reference Signal Strength Indication
  • UTRAN CPICH Common Pilot Channel
  • RSCP Receiveived Signal Code Power
  • -E-UTRAN measurement ng-eNB reception-transmission time difference (Rx-Tx Time difference), timing advance (TADV), Angle of Arrival (AoA)
  • TADV can be divided into Type 1 and Type 2 as follows.
  • TADV Type 1 (ng-eNB reception-transmission time difference) + (UE E-UTRA reception-transmission time difference)
  • TADV Type 2 ng-eNB receive-transmit time difference
  • AoA may be used to measure the direction of the UE.
  • AoA may be defined as the estimated angle of the UE's position in a counterclockwise direction from the base station/TP. In this case, the geographical reference direction may be north.
  • the base station/TP may use an uplink signal such as a sounding reference signal (SRS) and/or a demodulation reference signal (DMRS) for AoA measurement.
  • SRS sounding reference signal
  • DMRS demodulation reference signal
  • the larger the array of antenna arrays the higher the accuracy of AoA measurement.
  • signals received from adjacent antenna elements may have a constant phase-rotation.
  • UTDOA is a method of determining the location of a UE by estimating the arrival time of the SRS.
  • the location of the UE can be estimated through a difference in arrival time with another cell (or base station/TP) by using the serving cell as a reference cell.
  • the E-SMLC may indicate a serving cell of the target UE in order to instruct the target UE to transmit SRS.
  • the E-SMLC may provide configurations such as periodic/aperiodic SRS, bandwidth, and frequency/group/sequence hopping.
  • SL DRX operation is supported in Release 17 NR V2X.
  • a method of canceling a transmission resource request (e.g., triggered (pending) SR and BSR) procedure of a UE performing a sidelink operation is proposed.
  • the Tx UE is allocated SL dynamic grant from the base station through SR and BSR transmission in order to be allocated SL dynamic grant.
  • the MAC of the Tx UE triggers BSR upon receiving an available data indication from an upper layer (RLC, PDCP).
  • RLC upper layer
  • SR is triggered and SR is transmitted to receive allocation of resources for transmitting BSR MAC CE.
  • a grant for BSR transmission is allocated by transmitting SR to the base station, the Tx UE transmits a triggered BSR to the base station to receive a grant for SL data transmission.
  • the Tx UE transmits SL data to the Rx UE using the allocated SL dynamic grant.
  • R17 supports SL DRX operation.
  • a UE operating DRX operates in active mode during DRX active time (e.g., onduration timer, inactivity timer, retransmission timer, or a period operating in active mode) to perform PSCCH/PSSCH monitoring.
  • DRX active time e.g., onduration timer, inactivity timer, retransmission timer, or a period operating in active mode
  • the DRX inactive time interval it operates in sleep mode and does not perform PSCCH/PSSCH monitoring for SL data reception.
  • the SR is also triggered when the BSR is triggered. If SL data is transmitted to Rx UE (Rx UE operating as SL DRX) using SL Dynamic Grant, which will be allocated by transmitting triggered SR/BSR, within PDB (packet delay budget) requirement linked with SL data Triggered only when the Rx UE's SL DRX active time (e.g., onduration timer, inactivity timer, retransmission timer, or a section operating in active mode) exists (not yet transmitted) SR/BSR is valid Tx UE It is proposed to allow Pending (not yet transmitted) SR/BSR to be determined and triggered.
  • PDB packet delay budget
  • the Tx UE transmits the triggered SR/BSR and transmits SL data to the Rx UE (Rx UE operating as SL DRX) using the SL Dynamic Grant to be allocated, PDB (packet delay budget) linked with the SL data )
  • the SL DRX active time of the Rx UE e.g., onduration timer, inactivity timer, retransmission timer, or period operating in active mode
  • the triggered pending (not yet transmitted state) SR/BSR is valid It is proposed to cancel (not transmit) the triggered pending SR/BSR by determining that it is not.
  • Dynamic grant is an operation in which a base station allocates resources based on BSR. If the transmitting terminal has available data, BSR is triggered. Also, when BSR is triggered, SR is automatically triggered. The SR transmitted by the transmitting terminal to the base station requests resources for transmitting the BSR. The base station receiving the SR from the transmitting terminal transmits a BSR grant for resources for transmitting the BSR to the transmitting terminal. The transmitting terminal transmits the BSR to the base station using the BSR grant. Upon receiving the BSR from the transmitting terminal, the base station allocates resources equal to the buffer status to the transmitting terminal. The transmitting terminal transmits sidelink data to the receiving terminal using resources allocated from the base station through the BSR.
  • a transmitting terminal may receive a dynamic grant from a base station by transmitting SR/BSR. If the time resource according to the dynamic grant is not included in the active time of the receiving terminal, and the initial transmission using the resource scheduled by the base station to the transmitting terminal in DCI using the initial transmission resource fails, the transmitting terminal sends HARQ feedback ACK through PUCCH transmission so that no more resources are allocated. If the transmitting terminal transmits an HARQ feedback NACK to the base station after the transmitting terminal transmits the initial transmission, the base station allocates retransmission resources to the transmitting terminal. The transmitting terminal may transmit data to the receiving terminal using a retransmission resource allocated from the base station.
  • the transmitting terminal may transmit an HARQ feedback ACK on the PUCCH to receive resource allocation again from the base station and retransmit data to the receiving terminal.
  • the transmitting terminal may not transmit SR or BSR.
  • a packet delay budget is a delay requirement for how long data must be successfully sent to a receiving terminal.
  • the transmitting terminal can predict the active time of the receiving terminal.
  • the transmitting terminal predicts the active time of the receiving terminal based on the PDB before transmitting the SR / BSR to the base station, until the transmitting terminal transmits the SR / BSR to the base station and receives the grant corresponding to the SR / BSR Considering time (eg, processing time), there may occur a case where there is no DRX active time of a receiving terminal in a PDB related to SL data. In this case, the transmitting terminal does not have to transmit the SR/BSR to the base station.
  • time eg, processing time
  • a PDB may be determined for a transmitting terminal and a DRX active time of a receiving terminal may be predicted.
  • a time when available data is generated to the transmitting terminal the transmitting terminal can transmit a BSR to the base station, and receive a grant for transmitting data from the base station can be expected.
  • the active time of the receiving terminal is predicted, it may be a time point that has already passed the PDB. If so, even if the transmitting terminal receives a grant for SL data by transmitting the BSR, it is only a grant for transmission of SL data that has already been determined not to be included in the DRX active time.
  • the transmitting terminal transmits the BSR and receives the grant from the base station, it is determined that the grant is already useless. If the transmitting terminal determines this in advance, even if the BSR is triggered, unnecessary operations can be prevented in advance without transmitting the BSR.
  • the transmitting terminal When the transmitting terminal receives the BSR grant from the base station, even if the PDB remains satisfied, the DRX active time of the receiving terminal may not be satisfied. If the point at which the PDB ends does not correspond to the DRX active time of the receiving terminal, the transmitting terminal may not transmit the BSR to the base station. This behavior is different from ignoring grants for SL data.
  • the operation of transmitting the BSR to the base station by the transmitting terminal is an operation of requesting a grant for SL data.
  • BSR is triggered for the transmitting terminal. If so, the transmitting terminal needs to transmit the BSR, and resources for transmitting the BSR are required. Therefore, when the BSR is triggered, the transmitting terminal automatically triggers the SR, and the transmitting terminal transmits the SR to the base station.
  • the base station receives the SR from the transmitting terminal, the base station allocates resources for transmitting the BSR to the transmitting terminal. That is, when the BSR is triggered in the transmitting terminal, the SR should be transmitted first.
  • the transmitting terminal may calculate the timing of transmitting the SR to the base station and receiving the BSR grant from the base station.
  • the transmitting terminal may cancel the SR transmission and not transmit the SR by comparing the time at which the BSR grant is received with the DRX active time of the receiving terminal. That is, considering the processing time for SR transmission (eg, the time until the transmitting terminal transmits SR to the base station and receives the BSR grant for BSR transmission), etc., the DRX active time of the receiving terminal is within the PDB requirements If not present, the transmitting terminal may cancel transmission of the SR.
  • the BSR is triggered on the transmitting terminal and the SR is automatically triggered on the transmitting terminal
  • the transmitting terminal transmits the SR to the base station
  • the transmitting terminal transmits the BSR to the base station
  • the transmitting terminal may calculate the time to transmit the BSR to the base station and receive the grant for SL data from the base station.
  • the transmitting terminal may cancel the BSR transmission by comparing the timing of receiving the grant for the SL data with the DRX active time of the receiving terminal, and may not transmit the BSR.
  • the processing time for BSR transmission eg., the time until the transmitting terminal transmits the BSR to the base station and receives a grant for SR data transmission
  • the DRX active time of the receiving terminal is within the PDB requirements If not present, the transmitting terminal may cancel transmission of the BSR.
  • 17 is a diagram for explaining a method of operating a terminal according to an embodiment of the present disclosure.
  • FIG. 17 relates to a method performed by a first terminal to transmit SL data to a second terminal operating sidelink discontinuous reception (SL DRX) in a wireless communication system.
  • SL DRX sidelink discontinuous reception
  • a first terminal identifies a first trigger of a buffer status report (BSR) based on available SL data.
  • BSR buffer status report
  • step S1702 the first terminal identifies a second trigger of a scheduling request (SR) based on the first trigger of the BSR.
  • SR scheduling request
  • step S1703 the first terminal determines the DRX active time of the second terminal for the triggered BSR based on the triggered SR.
  • the first terminal determines whether the DRX active time of the second terminal exists within the PDB request (packet delay budget requirement) for resources to be allocated based on the transmission of the triggered BSR and the transmission of the triggered SR decide
  • a packet delay budget (PDB) defines an upper limit for the amount of time a packet can be delayed between a user equipment (UE) and a user plane function (UPF) terminating the N6 interface.
  • the PDB requirement (packet delay budget requirement) of SL data refers to a time interval in which an upper limit of the interval length is defined by a PDB related to SL data.
  • step S1705 If it is determined that the DRX active time of the second terminal exists within the PDB request for the resource to be allocated based on the triggered BSR transmission and the triggered SR transmission, the first terminal proceeds to step S1705. If it is determined that the DRX active time of the second terminal does not exist within the PDB request for the resource to be allocated based on the triggered BSR transmission and the triggered SR transmission, the first terminal proceeds to step S1706.
  • step S1705 the first terminal transmits the triggered SR to the base station.
  • step S1706 the first terminal cancels the transmission of the triggered BSR and the transmission of the triggered SR based on the second trigger.
  • step S1707 the first terminal receives a BSR grant from the base station in response to the triggered SR transmission.
  • step S1708 the first terminal determines whether the DRX active time of the second terminal exists in the PDB request for the resource to be allocated based on the transmission of the triggered BSR. If it is determined that the DRX active time of the second terminal exists within the PDB request for the resource to be allocated based on the triggered BSR transmission, the first terminal proceeds to step S1709. If it is determined that the second predicted DRX active time does not exist within the PDB request for the SL data, the first terminal proceeds to step S1710.
  • step S1709 the first terminal transmits the triggered BSR to the base station based on the BSR grant.
  • step S1710 the first terminal cancels the transmission of the triggered BSR.
  • step S1711 the first terminal receives a sidelink dynamic grant (SL dynamic grant) for the SL data from the base station in response to the triggered BSR transmission.
  • SL dynamic grant sidelink dynamic grant
  • step S1712 the first terminal transmits the SL data to the second terminal based on the SL dynamic grant.
  • resources to be allocated based on the transmission of the triggered BSR and the transmission of the triggered SR may be determined in consideration of the minimum processing time required in relation to the triggered SR and the triggered BSR.
  • resources to be allocated based on transmission of the triggered BSR may be determined in consideration of a minimum processing time required in relation to the triggered BSR.
  • the DRX active time of the second terminal is an operating time interval of an on-duration timer of the second terminal and an operating time interval of an inactivity timer of the second terminal. , an operating time interval of a retransmission timer of the second terminal, or a time interval corresponding to an active mode of the second terminal.
  • the second terminal when the DRX active time of the second terminal does not exist within the PDB request, the second terminal enters an inactive mode or a sleep mode within the PDB request It can be predicted that it will work as
  • the first terminal may support sidelink mode 1 (SL mode 1).
  • SL mode 1 sidelink mode 1
  • a first terminal for transmitting SL data to a second terminal operating sidelink discontinuous reception (SL DRX) in a wireless communication system is provided.
  • the first terminal may include a transceiver and at least one processor, and the at least one processor may be configured to perform the operating method of the first terminal according to various embodiments of FIG. 17 .
  • Operations according to various embodiments of the present disclosure are solutions applicable to all sidelink unicast/groupcast/broadcast operations.
  • Sidelink DRX Configuration mentioned in this disclosure may include at least one or more of the following parameters.
  • SL drx-onDurationTimer the duration at the beginning of a SL DRX Cycle
  • SL drx-HARQ-RTT-Timer (per HARQ process or per sidelink process): the minimum duration before an assignment for HARQ retransmission is expected by the MAC entity.
  • SL drx-RetransmissionTimer (per HARQ process or per sidelink process): the maximum duration until a retransmission is received
  • the Sidelink DRX timer mentioned in this disclosure can be used for the following purposes.
  • a period in which the Sidelink DRX Onduration period which is a period in which a UE performing Sidelink DRX operation must operate in Active Time by default in order to receive PSCCH/PSSCH of the other UE, is extended. That is, the Sidelink DRX Onduration Timer can be extended by the Sidelink DRX Inactivity Timer interval.
  • the UE may start the Sidelink DRX Inactivity Timer to extend the Sidelink DRX Onduration timer.
  • the UE monitors reception of a retransmitted sidelink packet (or PSSCH assignment) transmitted by the other UE.
  • the Uu DRX timer mentioned in this disclosure can be used for the following purposes.
  • Tx UE UE supporting Uu DRX operation
  • PDCCH or DCI
  • the names of the timers are exemplary, and the same/similar functions are performed based on the description in each timer.
  • a timer that does may be regarded as the same/similar timer regardless of its name.
  • the proposal of the present disclosure is a solution that can be applied and extended as a way to solve the problem of loss due to interruption occurring during Uu Bandwidth Part (BWP) switching.
  • BWP Bandwidth Part
  • BWP Sidelink Multiple Bandwidth Part
  • the proposal of the present disclosure is a parameter (and timer) included in the Default / Common Sidelink DRX configuration or Default / Common Sidelink DRX pattern or Default / Common Sidelink DRX configuration, as well as UE-Pair Specific Sidelink DRX configuration or UE-Pair Specific Sidelink DRX It can also be extended and applied to parameters (and timers) included in patterns or UE-Pair Specific Sidelink DRX configuration.
  • the Onduration term mentioned in the proposal of the present disclosure can be interpreted as an extended period of Active Time (a section operating in a wake up state (RF module is “On”) to receive/transmit a wireless signal), and the Offduration term can be interpreted as Sleep Time (period operating in sleep mode state (RF module is “Off”) for power saving, Transmitting UE does not mean that it is obligatory to operate in sleep mode during sleep time interval. If necessary, even during sleep time, sensing operation/ It is allowed to operate in active time for a while for transmission operation.) It can be extended and interpreted as a section.
  • “whether or not (some) proposed methods/rules of this disclosure are applied and / or related parameters are resource pools, congestion levels, service priorities (and / or types), QoS requirements (eg, Latency, Reliability) or PQI, traffic type (e.g., (a) periodic generation), Sidelink transmission resource allocation mode (mode 1, mode 2), etc., may be specifically (or differently or independently) set”.
  • whether the proposed rule of the present disclosure is applied depends on resource pool, service/packet type (and/or priority), and QoS requirements (e.g., URLLC/EMBB Traffic, Reliability, Latency) , PQI, PFI, Cast Type (eg, Unicast, Groupcast, Broadcast), (resource pool) congestion level (eg, CBR), SL HARQ feedback method (eg, NACK Only Feedback, ACK/NACK Feedback), HARQ Feedback Enabled MAC
  • PDU and/or HARQ Feedback Disabled MAC PDU
  • Pre-emption and/or Re-Evaluation
  • constant time referred to in the proposal of this disclosure means that the UE operates in an Active Time as much as a predefined time to receive a sidelink signal or sidelink data from the other UE, or a time or a specific timer (Sidelink DRX Retransmission Timer or Sidelink DRX Inactivity Timer or RX Timer that guarantees operation in Active Time in DRX operation of the UE) refers to the time operating in Active Time as much as the time.
  • the application of the proposal and the proposed rule of the present disclosure may also be applied to mmWave Sidelink operation.
  • FIG. 18 illustrates a communication system 1, according to an embodiment of the present disclosure.
  • the embodiment of FIG. 18 may be combined with various embodiments of the present disclosure.
  • a communication system 1 to which various embodiments of the present disclosure are applied includes a wireless device, a base station, and a network.
  • the wireless device means a device that performs communication using a radio access technology (eg, 5G New RAT (NR), Long Term Evolution (LTE)), and may be referred to as a communication/wireless/5G device.
  • wireless devices include robots 100a, vehicles 100b-1 and 100b-2, XR (eXtended Reality) devices 100c, hand-held devices 100d, and home appliances 100e. ), an Internet of Thing (IoT) device 100f, and an AI device/server 400.
  • IoT Internet of Thing
  • the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing inter-vehicle communication, and the like.
  • the vehicle may include an Unmanned Aerial Vehicle (UAV) (eg, a drone).
  • UAV Unmanned Aerial Vehicle
  • XR devices include Augmented Reality (AR)/Virtual Reality (VR)/Mixed Reality (MR) devices, Head-Mounted Devices (HMDs), Head-Up Displays (HUDs) installed in vehicles, televisions, smartphones, It may be implemented in the form of a computer, wearable device, home appliance, digital signage, vehicle, robot, and the like.
  • a portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, a smart glass), a computer (eg, a laptop computer, etc.), and the like.
  • Home appliances may include a TV, a refrigerator, a washing machine, and the like.
  • IoT devices may include sensors, smart meters, and the like.
  • a base station and a network may also be implemented as a wireless device, and a specific wireless device 200a may operate as a base station/network node to other wireless devices.
  • the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may include LTE, NR, and 6G as well as narrowband Internet of Things for low power communication.
  • NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology, and may be implemented in standards such as LTE Cat NB1 and / or LTE Cat NB2. no.
  • the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may perform communication based on LTE-M technology.
  • LTE-M technology may be an example of LPWAN technology, and may be called various names such as eMTC (enhanced machine type communication).
  • LTE-M technologies are 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and/or 7) It may be implemented in at least one of various standards such as LTE M, and is not limited to the above-mentioned names.
  • the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure includes at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) considering low power communication. It may include any one, and is not limited to the above-mentioned names.
  • ZigBee technology can generate personal area networks (PANs) related to small/low-power digital communication based on various standards such as IEEE 802.15.4, and can be called various names.
  • PANs personal area networks
  • the wireless devices 100a to 100f may be connected to the network 300 through the base station 200 .
  • AI Artificial Intelligence
  • the network 300 may be configured using a 3G network, a 4G (eg LTE) network, or a 5G (eg NR) network.
  • the wireless devices 100a to 100f may communicate with each other through the base station 200/network 300, but may also communicate directly (eg, sidelink communication) without going through the base station/network.
  • the vehicles 100b-1 and 100b-2 may perform direct communication (eg, vehicle to vehicle (V2V)/vehicle to everything (V2X) communication).
  • IoT devices eg, sensors
  • IoT devices may directly communicate with other IoT devices (eg, sensors) or other wireless devices 100a to 100f.
  • Wireless communication/connection 150a, 150b, and 150c may be performed between the wireless devices 100a to 100f/base station 200 and the base station 200/base station 200.
  • wireless communication/connection refers to various wireless connections such as uplink/downlink communication 150a, sidelink communication 150b (or D2D communication), and inter-base station communication 150c (e.g. relay, Integrated Access Backhaul (IAB)).
  • IAB Integrated Access Backhaul
  • Wireless communication/connection (150a, 150b, 150c) allows wireless devices and base stations/wireless devices, and base stations and base stations to transmit/receive radio signals to/from each other.
  • the wireless communication/connection 150a, 150b, and 150c may transmit/receive signals through various physical channels.
  • various signal processing processes eg, channel encoding/decoding, modulation/demodulation, resource mapping/demapping, etc.
  • resource allocation processes e.g., resource allocation processes, and the like.
  • FIG. 19 illustrates a wireless device according to an embodiment of the present disclosure.
  • the embodiment of FIG. 19 may be combined with various embodiments of the present disclosure.
  • the first wireless device 100 and the second wireless device 200 may transmit and receive radio signals through various radio access technologies (eg, LTE, NR).
  • ⁇ the first wireless device 100 and the second wireless device 200 ⁇ refer to ⁇ the wireless device 100x and the base station 200 ⁇ of FIG. 18 and/or ⁇ the wireless device 100x and the wireless device 100x. ⁇ can correspond.
  • the first wireless device 100 includes one or more processors 102 and one or more memories 104, and may additionally include one or more transceivers 106 and/or one or more antennas 108.
  • the processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or flowcharts of operations disclosed herein.
  • the processor 102 may process information in the memory 104 to generate first information/signal, and transmit a radio signal including the first information/signal through the transceiver 106 .
  • the processor 102 may receive a radio signal including the second information/signal through the transceiver 106, and then store information obtained from signal processing of the second information/signal in the memory 104.
  • the memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102 .
  • memory 104 may perform some or all of the processes controlled by processor 102, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed herein. It may store software codes including them.
  • the processor 102 and memory 104 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
  • the transceiver 106 may be coupled to the processor 102 and may transmit and/or receive wireless signals via one or more antennas 108 .
  • the transceiver 106 may include a transmitter and/or a receiver.
  • the transceiver 106 may be used interchangeably with a radio frequency (RF) unit.
  • a wireless device may mean a communication modem/circuit/chip.
  • the second wireless device 200 includes one or more processors 202, one or more memories 204, and may further include one or more transceivers 206 and/or one or more antennas 208.
  • Processor 202 controls memory 204 and/or transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed herein.
  • the processor 202 may process information in the memory 204 to generate third information/signal, and transmit a radio signal including the third information/signal through the transceiver 206.
  • the processor 202 may receive a radio signal including the fourth information/signal through the transceiver 206 and store information obtained from signal processing of the fourth information/signal in the memory 204 .
  • the memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202 .
  • memory 204 may perform some or all of the processes controlled by processor 202, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed herein. It may store software codes including them.
  • the processor 202 and memory 204 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
  • the transceiver 206 may be coupled to the processor 202 and may transmit and/or receive wireless signals via one or more antennas 208 .
  • the transceiver 206 may include a transmitter and/or a receiver.
  • the transceiver 206 may be used interchangeably with an RF unit.
  • a wireless device may mean a communication modem/circuit/chip.
  • one or more protocol layers may be implemented by one or more processors 102, 202.
  • one or more processors 102, 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP).
  • One or more processors 102, 202 may generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) in accordance with the descriptions, functions, procedures, proposals, methods and/or operational flow charts disclosed herein.
  • PDUs Protocol Data Units
  • SDUs Service Data Units
  • processors 102, 202 may generate messages, control information, data or information according to the descriptions, functions, procedures, proposals, methods and/or operational flow diagrams disclosed herein.
  • One or more processors 102, 202 generate PDUs, SDUs, messages, control information, data or signals (e.g., baseband signals) containing information according to the functions, procedures, proposals and/or methods disclosed herein , can be provided to one or more transceivers 106, 206.
  • One or more processors 102, 202 may receive signals (eg, baseband signals) from one or more transceivers 106, 206, and descriptions, functions, procedures, proposals, methods, and/or flowcharts of operations disclosed herein PDUs, SDUs, messages, control information, data or information can be obtained according to these.
  • signals eg, baseband signals
  • One or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor or microcomputer.
  • One or more processors 102, 202 may be implemented by hardware, firmware, software, or a combination thereof.
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • DSPDs Digital Signal Processing Devices
  • PLDs Programmable Logic Devices
  • FPGAs Field Programmable Gate Arrays
  • firmware or software may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, and the like.
  • Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein may be included in one or more processors 102, 202 or stored in one or more memories 104, 204 and It can be driven by the above processors 102 and 202.
  • the descriptions, functions, procedures, suggestions, methods and/or operational flow charts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and/or sets of instructions.
  • One or more memories 104, 204 may be coupled with one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, codes, instructions and/or instructions.
  • One or more memories 104, 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer readable storage media, and/or combinations thereof.
  • One or more memories 104, 204 may be located internally and/or external to one or more processors 102, 202. Additionally, one or more memories 104, 204 may be coupled to one or more processors 102, 202 through various technologies, such as wired or wireless connections.
  • One or more transceivers 106, 206 may transmit user data, control information, radio signals/channels, etc., as referred to in the methods and/or operational flow charts herein, to one or more other devices.
  • One or more transceivers 106, 206 may receive user data, control information, radio signals/channels, etc. referred to in descriptions, functions, procedures, proposals, methods and/or operational flow charts, etc. disclosed herein from one or more other devices. there is.
  • one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive wireless signals.
  • one or more processors 102, 202 may control one or more transceivers 106, 206 to transmit user data, control information, or radio signals to one or more other devices. Additionally, one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information, or radio signals from one or more other devices. In addition, one or more transceivers 106, 206 may be coupled with one or more antennas 108, 208, and one or more transceivers 106, 206 via one or more antennas 108, 208, as described herein, function. , procedures, proposals, methods and / or operation flowcharts, etc. can be set to transmit and receive user data, control information, radio signals / channels, etc.
  • one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports).
  • One or more transceivers (106, 206) convert the received radio signals/channels from RF band signals in order to process the received user data, control information, radio signals/channels, etc. using one or more processors (102, 202). It can be converted into a baseband signal.
  • One or more transceivers 106 and 206 may convert user data, control information, and radio signals/channels processed by one or more processors 102 and 202 from baseband signals to RF band signals.
  • one or more of the transceivers 106, 206 may include (analog) oscillators and/or filters.
  • 20 illustrates a signal processing circuit for a transmission signal according to an embodiment of the present disclosure. 20 may be combined with various embodiments of the present disclosure.
  • the signal processing circuit 1000 may include a scrambler 1010, a modulator 1020, a layer mapper 1030, a precoder 1040, a resource mapper 1050, and a signal generator 1060.
  • the operations/functions of FIG. 20 may be performed by processors 102 and 202 and/or transceivers 106 and 206 of FIG. 19 .
  • the hardware elements of FIG. 20 may be implemented in processors 102 and 202 and/or transceivers 106 and 206 of FIG. 19 .
  • blocks 1010-1060 may be implemented in processors 102 and 202 of FIG. 19 .
  • blocks 1010 to 1050 may be implemented in the processors 102 and 202 of FIG. 19
  • block 1060 may be implemented in the transceivers 106 and 206 of FIG. 19 .
  • the codeword may be converted into a radio signal through the signal processing circuit 1000 of FIG. 20 .
  • a codeword is an encoded bit sequence of an information block.
  • Information blocks may include transport blocks (eg, UL-SCH transport blocks, DL-SCH transport blocks).
  • Radio signals may be transmitted through various physical channels (eg, PUSCH, PDSCH).
  • the codeword may be converted into a scrambled bit sequence by the scrambler 1010.
  • a scramble sequence used for scrambling is generated based on an initialization value, and the initialization value may include ID information of a wireless device.
  • the scrambled bit sequence may be modulated into a modulation symbol sequence by modulator 1020.
  • the modulation scheme may include pi/2-Binary Phase Shift Keying (pi/2-BPSK), m-Phase Shift Keying (m-PSK), m-Quadrature Amplitude Modulation (m-QAM), and the like.
  • the complex modulation symbol sequence may be mapped to one or more transport layers by the layer mapper 1030.
  • Modulation symbols of each transport layer may be mapped to corresponding antenna port(s) by the precoder 1040 (precoding).
  • the output z of the precoder 1040 can be obtained by multiplying the output y of the layer mapper 1030 by the N*M precoding matrix W.
  • N is the number of antenna ports and M is the number of transport layers.
  • the precoder 1040 may perform precoding after performing transform precoding (eg, DFT transformation) on complex modulation symbols. Also, the precoder 1040 may perform precoding without performing transform precoding.
  • the resource mapper 1050 may map modulation symbols of each antenna port to time-frequency resources.
  • the time-frequency resource may include a plurality of symbols (eg, CP-OFDMA symbols and DFT-s-OFDMA symbols) in the time domain and a plurality of subcarriers in the frequency domain.
  • the signal generator 1060 generates a radio signal from the mapped modulation symbols, and the generated radio signal can be transmitted to other devices through each antenna.
  • the signal generator 1060 may include an inverse fast Fourier transform (IFFT) module, a cyclic prefix (CP) inserter, a digital-to-analog converter (DAC), a frequency uplink converter, and the like.
  • IFFT inverse fast Fourier transform
  • CP cyclic prefix
  • DAC digital-to-analog converter
  • the signal processing process for the received signal in the wireless device may be configured in reverse to the signal processing process 1010 to 1060 of FIG. 20 .
  • wireless devices eg, 100 and 200 of FIG. 19
  • the received radio signal may be converted into a baseband signal through a signal restorer.
  • the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a fast Fourier transform (FFT) module.
  • ADC analog-to-digital converter
  • FFT fast Fourier transform
  • the baseband signal may be restored to a codeword through a resource de-mapper process, a postcoding process, a demodulation process, and a de-scramble process.
  • a signal processing circuit for a received signal may include a signal restorer, a resource demapper, a postcoder, a demodulator, a descrambler, and a decoder.
  • FIG. 21 illustrates a wireless device according to an embodiment of the present disclosure.
  • a wireless device may be implemented in various forms according to use-case/service (see FIG. 18).
  • the embodiment of FIG. 21 may be combined with various embodiments of the present disclosure.
  • wireless devices 100 and 200 correspond to the wireless devices 100 and 200 of FIG. 19, and include various elements, components, units/units, and/or modules. ) can be configured.
  • the wireless devices 100 and 200 may include a communication unit 110 , a control unit 120 , a memory unit 130 and an additional element 140 .
  • the communication unit may include communication circuitry 112 and transceiver(s) 114 .
  • communication circuitry 112 may include one or more processors 102, 202 of FIG. 19 and/or one or more memories 104, 204.
  • transceiver(s) 114 may include one or more transceivers 106, 206 of FIG. 19 and/or one or more antennas 108, 208.
  • the control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140 and controls overall operations of the wireless device. For example, the control unit 120 may control electrical/mechanical operations of the wireless device based on programs/codes/commands/information stored in the memory unit 130. In addition, the control unit 120 transmits the information stored in the memory unit 130 to the outside (eg, another communication device) through the communication unit 110 through a wireless/wired interface, or transmits the information stored in the memory unit 130 to the outside (eg, another communication device) through the communication unit 110. Information received through a wireless/wired interface from other communication devices) may be stored in the memory unit 130 .
  • the additional element 140 may be configured in various ways according to the type of wireless device.
  • the additional element 140 may include at least one of a power unit/battery, an I/O unit, a driving unit, and a computing unit.
  • the wireless device may be a robot (Fig. 18, 100a), a vehicle (Fig. 18, 100b-1, 100b-2), an XR device (Fig. 18, 100c), a mobile device (Fig. 18, 100d), a home appliance. (FIG. 18, 100e), IoT device (FIG.
  • digital broadcasting terminal digital broadcasting terminal
  • hologram device public safety device
  • MTC device medical device
  • fintech device or financial device
  • security device climate/environmental device
  • It may be implemented in the form of an AI server/device (Fig. 18, 400), a base station (Fig. 18, 200), a network node, and the like.
  • Wireless devices can be mobile or used in a fixed location depending on the use-case/service.
  • various elements, components, units/units, and/or modules in the wireless devices 100 and 200 may be entirely interconnected through a wired interface or at least partially connected wirelessly through the communication unit 110.
  • the control unit 120 and the communication unit 110 are connected by wire, and the control unit 120 and the first units (eg, 130 and 140) are connected through the communication unit 110.
  • the control unit 120 and the first units eg, 130 and 140
  • each element, component, unit/unit, and/or module within the wireless device 100, 200 may further include one or more elements.
  • the control unit 120 may be composed of one or more processor sets.
  • the controller 120 may include a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphic processing processor, a memory control processor, and the like.
  • the memory unit 130 may include random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, and non-volatile memory. volatile memory) and/or a combination thereof.
  • a portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, a smart glass), and a portable computer (eg, a laptop computer).
  • a mobile device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT).
  • MS mobile station
  • UT user terminal
  • MSS mobile subscriber station
  • SS subscriber station
  • AMS advanced mobile station
  • WT wireless terminal
  • the portable device 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a memory unit 130, a power supply unit 140a, an interface unit 140b, and an input/output unit 140c. ) may be included.
  • the antenna unit 108 may be configured as part of the communication unit 110 .
  • Blocks 110 to 130/140a to 140c respectively correspond to blocks 110 to 130/140 of FIG. 21 .
  • the communication unit 110 may transmit/receive signals (eg, data, control signals, etc.) with other wireless devices and base stations.
  • the controller 120 may perform various operations by controlling components of the portable device 100 .
  • the control unit 120 may include an application processor (AP).
  • the memory unit 130 may store data/parameters/programs/codes/commands necessary for driving the portable device 100 .
  • the memory unit 130 may store input/output data/information.
  • the power supply unit 140a supplies power to the portable device 100 and may include a wired/wireless charging circuit, a battery, and the like.
  • the interface unit 140b may support connection between the portable device 100 and other external devices.
  • the interface unit 140b may include various ports (eg, audio input/output ports and video input/output ports) for connection with external devices.
  • the input/output unit 140c may receive or output image information/signal, audio information/signal, data, and/or information input from a user.
  • the input/output unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and/or a haptic module.
  • the input/output unit 140c obtains information/signals (eg, touch, text, voice, image, video) input from the user, and the acquired information/signals are stored in the memory unit 130.
  • the communication unit 110 may convert the information/signal stored in the memory into a wireless signal, and directly transmit the converted wireless signal to another wireless device or to a base station.
  • the communication unit 110 may receive a radio signal from another wireless device or a base station and then restore the received radio signal to original information/signal. After the restored information/signal is stored in the memory unit 130, it may be output in various forms (eg, text, voice, image, video, haptic) through the input/output unit 140c.
  • Vehicles or autonomous vehicles may be implemented as mobile robots, vehicles, trains, manned/unmanned aerial vehicles (AVs), ships, and the like.
  • AVs manned/unmanned aerial vehicles
  • the embodiment of FIG. 23 may be combined with various embodiments of the present disclosure.
  • a vehicle or autonomous vehicle 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit.
  • a portion 140d may be included.
  • the antenna unit 108 may be configured as part of the communication unit 110 .
  • Blocks 110/130/140a to 140d respectively correspond to blocks 110/130/140 of FIG. 21 .
  • the communication unit 110 may transmit/receive signals (eg, data, control signals, etc.) with external devices such as other vehicles, base stations (e.g. base stations, roadside base stations, etc.), servers, and the like.
  • the controller 120 may perform various operations by controlling elements of the vehicle or autonomous vehicle 100 .
  • the controller 120 may include an Electronic Control Unit (ECU).
  • the driving unit 140a may drive the vehicle or autonomous vehicle 100 on the ground.
  • the driving unit 140a may include an engine, a motor, a power train, a wheel, a brake, a steering device, and the like.
  • the power supply unit 140b supplies power to the vehicle or autonomous vehicle 100, and may include a wired/wireless charging circuit, a battery, and the like.
  • the sensor unit 140c may obtain vehicle conditions, surrounding environment information, and user information.
  • the sensor unit 140c includes an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight detection sensor, a heading sensor, a position module, and a vehicle forward.
  • IMU inertial measurement unit
  • /Can include a reverse sensor, battery sensor, fuel sensor, tire sensor, steering sensor, temperature sensor, humidity sensor, ultrasonic sensor, illuminance sensor, pedal position sensor, and the like.
  • the autonomous driving unit 140d includes a technology for maintaining a driving lane, a technology for automatically adjusting speed such as adaptive cruise control, a technology for automatically driving along a predetermined route, and a technology for automatically setting a route when a destination is set and driving. technology can be implemented.
  • the communication unit 110 may receive map data, traffic information data, and the like from an external server.
  • the autonomous driving unit 140d may generate an autonomous driving route and a driving plan based on the acquired data.
  • the controller 120 may control the driving unit 140a so that the vehicle or autonomous vehicle 100 moves along the autonomous driving path according to the driving plan (eg, speed/direction adjustment).
  • the communicator 110 may non-/periodically obtain the latest traffic information data from an external server and obtain surrounding traffic information data from surrounding vehicles.
  • the sensor unit 140c may acquire vehicle state and surrounding environment information.
  • the autonomous driving unit 140d may update an autonomous driving route and a driving plan based on newly acquired data/information.
  • the communication unit 110 may transmit information about a vehicle location, an autonomous driving route, a driving plan, and the like to an external server.
  • the external server may predict traffic information data in advance using AI technology based on information collected from the vehicle or self-driving vehicles, and may provide the predicted traffic information data to the vehicle or self-driving vehicles.
  • the present disclosure relates to a wireless communication system. Specifically, the present disclosure relates to a method and apparatus for transmitting sidelink data to a receiving terminal during sidelink DRX operation in a wireless communication system.

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

Abstract

Selon divers modes de réalisation, la présente invention concerne un procédé mis en œuvre par un premier terminal afin de transmettre des données SL à un second terminal dans un fonctionnement de réception discontinue de liaison latérale (SL DRX) dans un système de communication sans fil, le procédé comprenant les étapes consistant à : identifier un premier déclencheur d'un rapport d'état de tampon (BSR) sur la base de données SL disponibles ; identifier un second déclencheur d'une demande de planification (SR) sur la base du premier déclencheur du BSR ; déterminer un temps actif de DRX du second terminal pour le BSR déclenché sur la base de la SR déclenchée ; et lorsque le temps actif de DRX du second terminal est présent dans une exigence de budget de retard de paquets (PDB) pour des ressources à attribuer sur la base de la transmission du BSR déclenché et de la transmission de la SR déclenchée, transmettre la SR déclenchée à une station de base, ou, lorsque le temps actif de DRX du second terminal n'est pas présent dans l'exigence de PDB pour les ressources à attribuer sur la base de la transmission du BSR déclenché et de la transmission de SR déclenchée, annuler la transmission de la SR déclenchée.
PCT/KR2022/013835 2021-09-15 2022-09-15 Procédé et dispositif de transmission de données de liaison latérale à un terminal de réception dans un fonctionnement drx de liaison latérale dans un système de communication sans fil WO2023043242A1 (fr)

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