WO2022154450A1 - Nr v2x에서 harq 피드백에 기반하여 sl drx 동작을 수행하는 방법 및 장치 - Google Patents
Nr v2x에서 harq 피드백에 기반하여 sl drx 동작을 수행하는 방법 및 장치 Download PDFInfo
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Definitions
- the present disclosure relates to a wireless communication system.
- a sidelink refers to a communication method in which a direct link is established between user equipment (UE), and voice or data is directly exchanged between terminals without going through a base station (BS).
- SL is being considered as one way to solve the burden of the base station due to the rapidly increasing data traffic.
- V2X vehicle-to-everything refers to a communication technology that exchanges information with other vehicles, pedestrians, and infrastructure-built objects through wired/wireless communication.
- V2X can be divided into four types: vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-network (V2N), and vehicle-to-pedestrian (V2P).
- V2X communication may be provided through a PC5 interface and/or a Uu interface.
- next-generation radio access technology in consideration of the above may be referred to as a new radio access technology (RAT) or a new radio (NR).
- RAT new radio access technology
- NR new radio
- V2X vehicle-to-everything
- FIG. 1 is a diagram for explaining a comparison of V2X communication based on RAT before NR and V2X communication based on NR.
- the embodiment of FIG. 1 may be combined with various embodiments of the present disclosure.
- V2X message may include location information, dynamic information, attribute information, and the like.
- the UE may transmit a CAM of a periodic message type and/or a DENM of an event triggered message type to another UE.
- V2X scenarios are being presented in NR.
- various V2X scenarios may include vehicle platooning, advanced driving, extended sensors, remote driving, and the like.
- the terminal may perform a sidelink discontinuous reception (SL DRX) operation to save power of the terminal.
- SL DRX sidelink discontinuous reception
- HARQ SL hybrid automatic repeat request
- NACK negative acknowledgment
- the transmitting terminal indicates that the receiving terminal receives the MAC protocol (PDU) data unit)
- PDU MAC protocol
- an additional retransmission operation may not be performed assuming that the data unit has been successfully received.
- the receiving terminal since the receiving terminal has not yet succeeded in receiving the MAC PDU, a problem of re-setting or extending the SL DRX timer may occur.
- the transmitting terminal assumes that the receiving terminal has not received the MAC PDU and additionally A retransmission operation may be performed.
- the receiving terminal succeeds in receiving the MAC PDU, a problem in not re-setting or extending the SL DRX timer may occur.
- a method for a first device to perform wireless communication is proposed.
- the method is a first sidelink control (SCI) for obtaining an SL sidelink discontinuous reception (DRX) configuration and scheduling a first physical sidelink shared channel (PSSCH) through a first physical sidelink control channel (PSCCH) from a second device information), receive the second SCI and first data through the first physical sidelink shared channel (PSSCH) from the second device, and based on the index of the slot and the index of the subchannel related to the first PSSCH
- it may include determining a first physical sidelink feedback channel (PSFCH) resource. For example, based on the omission of the first PSFCH transmission related to the first PSSCH on the first PSFCH resource, a first timer included in the SL DRX configuration may be started.
- PSFCH physical sidelink feedback channel
- a first device for performing wireless communication may include one or more memories storing instructions; one or more transceivers; and one or more processors connecting the one or more memories and the one or more transceivers.
- the one or more processors execute the instructions to obtain a sidelink discontinuous reception (SL DRX) configuration, and a first physical sidelink shared channel (PSSCH) through a first physical sidelink control channel (PSCCH) from a second device ), receive first sidelink control information (SCI) for scheduling, receive second SCI and first data from the second device through the first physical sidelink shared channel (PSSCH), and receive the first PSSCH and Based on the index of the related slot and the index of the subchannel, the first physical sidelink feedback channel (PSFCH) resource may be determined. For example, based on the omission of the first PSFCH transmission related to the first PSSCH on the first PSFCH resource, a first timer included in the SL DRX configuration may be started.
- an apparatus configured to control the first terminal may be provided.
- one or more processors and one or more memories operably coupled by the one or more processors and storing instructions.
- the one or more processors execute the instructions to obtain a sidelink discontinuous reception (SL DRX) configuration, and a first physical sidelink shared channel (PSSCH) through a first physical sidelink control channel (PSCCH) from a second terminal ) receives first SCI (sidelink control information) for scheduling, receives second SCI and first data from the second terminal through the first physical sidelink shared channel (PSSCH), and receives the first PSSCH and Based on the index of the related slot and the index of the subchannel, the first physical sidelink feedback channel (PSFCH) resource may be determined. For example, based on the omission of the first PSFCH transmission related to the first PSSCH on the first PSFCH resource, a first timer included in the SL DRX configuration may be started.
- a non-transitory computer-readable storage medium recording instructions may be provided.
- the instructions when executed, cause the first apparatus to: obtain an SL sidelink discontinuous reception (DRX) establishment, and from a second apparatus to a first physical sidelink control channel (PSCCH) via a first physical sidelink control channel (PSSCH).
- PSSCH physical sidelink control channel
- SCI sidelink control information
- PSSCH physical sidelink shared channel
- SCI sidelink control information
- PSSCH physical sidelink shared channel
- a first physical sidelink feedback channel (PSFCH) resource may be determined. For example, based on the omission of the first PSFCH transmission related to the first PSSCH on the first PSFCH resource, a first timer included in the SL DRX configuration may be started.
- a method for a second device to perform wireless communication includes transmitting first sidelink control information (SCI) for scheduling a first physical sidelink shared channel (PSSCH) to a first device through a first physical sidelink control channel (PSCCH), and to the first device It may include transmitting the second SCI and the first data through a first physical sidelink shared channel (PSSCH).
- SCI first sidelink control information
- PSSCH physical sidelink shared channel
- DRX SL sidelink discontinuous reception
- a first physical sidelink feedback channel (PSFCH) resource may be determined based on an index of a slot and a subchannel index related to the first PSSCH.
- a first timer included in the SL DRX configuration may be started.
- a second device for performing wireless communication may include one or more memories storing instructions; one or more transceivers; and one or more processors connecting the one or more memories and the one or more transceivers.
- the one or more processors execute the instructions to provide the first device with first sidelink control information (SCI) for scheduling a first physical sidelink shared channel (PSSCH) through a first physical sidelink control channel (PSCCH). ), and transmit the second SCI and the first data to the first device through the first physical sidelink shared channel (PSSCH).
- SCI sidelink control information
- PSSCH physical sidelink shared channel
- PSCCH first physical sidelink control channel
- DRX SL sidelink discontinuous reception
- a first physical sidelink feedback channel (PSFCH) resource may be determined based on an index of a slot and a subchannel index related to the first PSSCH. For example, based on the omission of the first PSFCH transmission related to the first PSSCH on the first PSFCH resource, a first timer included in the SL DRX configuration may be started.
- PSFCH physical sidelink feedback channel
- HARQ hybrid automatic repeat request
- PSFCH physical sidelink feedback channel
- NACK negative acknowledgment
- SL communication can be performed.
- the receiving terminal does not start the SL DRX timer, so that it can be effective in terms of power saving.
- FIG. 1 is a diagram for explaining a comparison of V2X communication based on RAT before NR and V2X communication based on NR.
- FIG. 2 shows a structure of an NR system 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 the structure of an NR radio frame 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 a BWP according to an embodiment of the present disclosure.
- FIG. 7 illustrates a terminal performing V2X or SL communication, according to an embodiment of the present disclosure.
- FIG. 8 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 9 illustrates three types of casts according to an embodiment of the present disclosure.
- FIG. 10 is a diagram illustrating a method in which a terminal that has reserved a transmission resource informs another terminal of information related to the transmission resource, according to an embodiment of the present disclosure.
- FIG. 11 illustrates a procedure in which a receiving terminal starts a timer related to SL DRX according to an embodiment of the present disclosure.
- FIG. 12 illustrates another procedure in which a receiving terminal starts a timer related to SL DRX according to an embodiment of the present disclosure.
- FIG. 13 illustrates an example of a reserved resource in which a receiving terminal is located after a timer related to SL DRX expires, according to an embodiment of the present disclosure.
- FIG. 14 illustrates a method for a first device to start a timer related to SL DRX, according to an embodiment of the present disclosure.
- FIG. 15 illustrates a method for starting an SL DRX timer according to an embodiment of the present disclosure.
- FIG. 16 shows a communication system 1 according to an embodiment of the present disclosure.
- FIG 17 illustrates a wireless device according to an embodiment of the present disclosure.
- FIG. 18 illustrates a signal processing circuit for a transmission signal according to an embodiment of the present disclosure.
- FIG. 19 illustrates a wireless device according to an embodiment of the present disclosure.
- FIG. 20 illustrates a portable device according to an embodiment of the present disclosure.
- 21 illustrates a vehicle or an autonomous driving vehicle according to an embodiment of the present disclosure.
- a or B (A or B) may mean “only A”, “only B”, or “both A and B”.
- a or B (A or B)” herein may be interpreted as “A and/or B (A and/or B)”.
- A, B or C(A, B or C) herein means “only A”, “only B”, “only C”, or “any and any combination of A, B and C ( any combination of A, B and C)”.
- a slash (/) or a comma (comma) may mean “and/or”.
- A/B may 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)”.
- At least one of A, B and C means “only A”, “only B”, “only C”, or “A, B and C” 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 can mean “at least one of A, B and C”.
- parentheses used herein may mean “for example”.
- PDCCH control information
- PDCCH control information
- parentheses used herein may mean “for example”.
- PDCCH control information
- PDCCH control information
- 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, and evolved UTRA (E-UTRA).
- 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), and employs OFDMA in the downlink and SC in the uplink.
- 3GPP 3rd generation partnership project
- LTE long term evolution
- E-UMTS evolved UMTS
- E-UTRA evolved-UMTS terrestrial radio access
- OFDMA OFDMA
- LTE-A (advanced) is an evolution of 3GPP LTE.
- 5G NR is a successor technology of LTE-A, and is a new clean-slate type mobile communication system with characteristics such as high performance, low latency, and high availability. 5G NR can utilize all available spectrum resources, from low frequency bands below 1 GHz to intermediate frequency bands from 1 GHz to 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.
- FIG. 2 shows a structure of an NR system according to an embodiment of the present disclosure.
- the embodiment of FIG. 2 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 the 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 a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), and a wireless device can be called
- the base station may be a fixed station communicating with the terminal 10 , and may be referred to as a base transceiver system (BTS), an access point, or other terms.
- BTS base transceiver system
- the embodiment of FIG. 2 exemplifies 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 (5G Core Network: 5GC) through an NG interface. More specifically, 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
- 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. layer), L2 (layer 2, second layer), and L3 (layer 3, third layer).
- OSI Open System Interconnection
- L2 layer 2, second layer
- L3 layer 3, third layer
- 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 is a radio resource 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.
- the embodiment of FIG. 3 may be combined with various embodiments of the present disclosure.
- Fig. 3 (a) shows a radio protocol stack of a user plane for Uu communication
- Fig. 3 (b) is a radio protocol of a control plane for Uu communication.
- FIG. 3C shows a radio protocol stack of a user plane for SL communication
- FIG. 3D shows a radio protocol stack of a control plane for SL communication.
- 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 over the air interface.
- the physical channel may be modulated in an Orthogonal Frequency Division Multiplexing (OFDM) scheme, and time and frequency are used 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 a plurality of logical channels to a plurality of 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 transfer 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 has a transparent mode (Transparent Mode, TM), an unacknowledged mode (Unacknowledged Mode, UM) and an acknowledged mode (Acknowledged Mode).
- TM Transparent Mode
- UM Unacknowledged Mode
- AM Acknowledged Mode
- AM RLC provides error correction through an automatic repeat request (ARQ).
- the RRC (Radio Resource Control) layer is defined only in the control plane.
- the RRC layer is responsible for controlling logical channels, transport channels, and physical channels in relation to configuration, re-configuration, and release of radio bearers.
- the RB is in the first layer (physical layer or PHY layer) and second layer (MAC layer, RLC layer, PDCP (Packet Data Convergence Protocol) layer, SDAP (Service Data Adaptation Protocol) layer) for data transfer between the terminal and the network.
- Logical path provided by
- 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 transmission of control plane data and encryption/integrity protection.
- the SDAP Service Data Adaptation Protocol
- the SDAP layer performs mapping between QoS flows and data radio bearers, and marking QoS flow identifiers (IDs) in downlink and uplink packets.
- Setting the RB means defining the characteristics of a radio protocol layer and channel in order to provide a specific service, and setting each specific parameter and operation method.
- the RB may be further divided into a Signaling Radio Bearer (SRB) and a Data Radio Bearer (DRB).
- SRB Signaling Radio Bearer
- DRB Data Radio Bearer
- an RRC_INACTIVE state is additionally defined, and a UE in an RRC_INACTIVE state may release a connection to a base station while maintaining a connection to the core network.
- a downlink transmission channel for transmitting data from the network to the terminal there are a BCH (Broadcast Channel) for transmitting system information and a downlink SCH (Shared Channel) for transmitting user traffic or control messages. Traffic or control messages of downlink multicast or broadcast services may be transmitted through a downlink SCH or may be transmitted through a separate downlink multicast channel (MCH).
- a random access channel RACH
- SCH uplink shared channel
- the logical channels that are located above the transport channel and are mapped to the transport channel include a Broadcast Control Channel (BCCH), a Paging Control Channel (PCCH), a Common Control Channel (CCCH), a Multicast Control Channel (MCCH), and a Multicast Traffic Channel (MTCH). channels), etc.
- BCCH Broadcast Control Channel
- PCCH Paging Control Channel
- CCCH Common Control Channel
- MCCH Multicast Control Channel
- MTCH Multicast Traffic Channel
- FIG. 4 shows the structure of an NR radio frame according to an embodiment of the present disclosure.
- the embodiment of FIG. 4 may be combined with various embodiments of the present disclosure.
- radio frames may 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 (HF).
- a half-frame may include 5 1ms subframes (Subframe, SF).
- 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 a CP-OFDM symbol), a single carrier-FDMA (SC-FDMA) symbol (or a Discrete Fourier Transform-spread-OFDM (DFT-s-OFDM) symbol).
- Table 1 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 ).
- Table 2 illustrates the number of symbols per slot, the number of slots per frame, and the number of slots per subframe according to SCS when the extended CP is used.
- OFDM(A) numerology eg, SCS, CP length, etc.
- OFDM(A) numerology eg, SCS, CP length, etc.
- an (absolute time) interval of a time resource eg, a subframe, a slot, or a TTI
- a TU Time Unit
- multiple numerology or SCS to support various 5G services may be supported. For example, when SCS is 15 kHz, wide area in traditional cellular bands can be supported, and when SCS is 30 kHz/60 kHz, dense-urban, lower latency) and a wider carrier bandwidth may be supported. For SCS of 60 kHz or higher, bandwidths greater than 24.25 GHz may be supported to overcome phase noise.
- the NR frequency band may be defined as two types of frequency ranges.
- the two types of frequency ranges may be FR1 and FR2.
- the numerical value of the frequency range may be changed, for example, the two types of frequency ranges may be as shown in Table 3 below.
- FR1 may mean "sub 6GHz range”
- FR2 may mean “above 6GHz range”
- 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 more. 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, for example, for communication for a vehicle (eg, autonomous driving).
- FIG. 5 illustrates a slot structure of an NR frame according to an embodiment of the present disclosure.
- the embodiment of FIG. 5 may be combined with various embodiments of the present disclosure.
- a slot includes a plurality of symbols in the time domain.
- one slot may include 14 symbols, but in the case of an extended CP, one slot may include 12 symbols.
- one slot may include 7 symbols, but in the case of an extended CP, one slot may include 6 symbols.
- a carrier wave 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.
- BWP Bandwidth Part
- P Physical Resource Block
- a carrier may include a maximum of N (eg, 5) BWPs. Data communication may be performed through the 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 BWP (Bandwidth Part) may be a contiguous set of PRBs (physical resource blocks) in a given neurology.
- the PRB may be selected from a contiguous subset of a common resource block (CRB) for a given neurology on a given carrier.
- CRB common resource block
- 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 PCell (primary cell).
- the UE may not receive a PDCCH, a physical downlink shared channel (PDSCH), or a reference signal (CSI-RS) (except for RRM) outside of the active DL BWP.
- the UE may not trigger CSI (Channel State Information) reporting for the inactive DL BWP.
- CSI Channel State Information
- the UE may not transmit a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) outside the active UL BWP.
- the initial BWP may be given as a contiguous set of RBs for a maintaining minimum system information (RMSI) CORESET (control resource set) (set by a physical broadcast channel (PBCH)).
- RMSI minimum system information
- PBCH physical broadcast channel
- the initial BWP may be given by a system information block (SIB) for a random access procedure.
- SIB system information block
- the default BWP may be set by a higher layer.
- the initial value of the default BWP may be the initial DL BWP.
- the terminal may switch the active BWP of the terminal to the default BWP.
- BWP may be defined for SL.
- the same SL BWP can be used for transmission and reception.
- the transmitting terminal may transmit an SL channel or an SL signal on a specific BWP
- the receiving terminal may receive an SL channel or an SL signal on the specific BWP.
- the SL BWP may be defined separately from the Uu BWP, and the SL BWP may have separate configuration signaling from the Uu BWP.
- the terminal may receive the configuration for the SL BWP from the base station / network.
- the terminal may receive the configuration for Uu BWP from the base station/network.
- the SL BWP may be configured (in advance) for the out-of-coverage NR V2X terminal and the RRC_IDLE terminal within the carrier. For a UE in RRC_CONNECTED mode, at least one SL BWP may be activated in a carrier.
- FIG. 6 shows an example of a BWP according to an embodiment of the present disclosure.
- the embodiment of 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 numbered carrier resource block from one end to the other end of the carrier band.
- the PRB may be a numbered resource block within each BWP.
- Point A may indicate a common reference point for a resource block grid (resource block grid).
- BWP may be set by a point A, an offset from the point A (N start BWP ), and a bandwidth (N size BWP ).
- the point A may be an external reference point of the PRB of the carrier to which subcarrier 0 of all neumonologies (eg, all neutronologies supported by the network in that carrier) is aligned.
- the offset may be the PRB spacing between point A and the lowest subcarrier in a given numerology.
- the bandwidth may be the number of PRBs in a given numerology.
- V2X or SL communication will be described.
- a Sidelink Synchronization Signal is an SL-specific sequence and may include a Primary Sidelink Synchronization Signal (PSSS) and a Secondary Sidelink Synchronization Signal (SSSS).
- PSSS Primary Sidelink Synchronization Signal
- SSSS Secondary Sidelink Synchronization Signal
- the 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 may be used for S-PSS
- length-127 Gold sequences may be used for S-SSS.
- the UE may detect an initial signal using S-PSS and may obtain synchronization.
- the UE may acquire detailed synchronization using S-PSS and S-SSS, and may detect a synchronization signal ID.
- PSBCH Physical Sidelink Broadcast Channel
- PSBCH Physical Sidelink Broadcast Channel
- the basic information is information related to SLSS, duplex mode (Duplex Mode, DM), TDD UL/DL (Time Division Duplex Uplink/Downlink) configuration, resource pool related information, type of application related to SLSS, It may be a subframe offset, broadcast information, or the like.
- the payload size of PSBCH may be 56 bits including 24-bit Cyclic Redundancy Check (CRC).
- S-PSS, S-SSS, and PSBCH may be included in a block format supporting periodic transmission (eg, SL SS (Synchronization Signal)/PSBCH block, hereinafter S-SSB (Sidelink-Synchronization Signal Block)).
- 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 the carrier, and the transmission bandwidth is (pre)set SL BWP (Sidelink) BWP).
- the bandwidth of the S-SSB may be 11 resource blocks (RBs).
- the 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.
- FIG. 7 illustrates a terminal performing V2X or SL communication, according to an embodiment of the present disclosure.
- the embodiment of FIG. 7 may be combined with various embodiments of the present disclosure.
- terminal in V2X or SL communication may mainly refer to a user's terminal.
- the base station may also be regarded as a kind of terminal.
- terminal 1 may be the first apparatus 100
- terminal 2 may be the second apparatus 200 .
- UE 1 may select a resource unit corresponding to a specific resource from a resource pool indicating a set of a series of resources. And, UE 1 may transmit an SL signal using the resource unit.
- UE 2 which is a receiving terminal, may receive a resource pool configured for UE 1 to transmit a signal, and may detect a signal of UE 1 in the resource pool.
- the base station may inform the terminal 1 of the resource pool.
- another terminal informs the terminal 1 of the resource pool, or the terminal 1 may use a preset resource pool.
- the resource pool may be composed of a plurality of resource units, and each UE may select one or a plurality of resource units to use for its own SL signal transmission.
- 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. 8 shows a terminal operation related to LTE transmission mode 1 or LTE transmission mode 3.
- (a) of FIG. 8 shows a terminal 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. 8 shows a terminal operation related to LTE transmission mode 2 or LTE transmission mode 4.
- (b) of FIG. 8 shows a terminal operation related to NR resource allocation mode 2.
- the base station may schedule an SL resource to be used by the terminal for SL transmission.
- the base station may perform resource scheduling to UE 1 through PDCCH (eg, Downlink Control Information (DCI)) or RRC signaling (eg, Configured Grant Type 1 or Configured Grant Type 2), and UE 1 is the V2X or SL communication with UE 2 may be performed according to resource scheduling.
- PDCCH Downlink Control Information
- RRC signaling eg, Configured Grant Type 1 or Configured Grant Type 2
- UE 1 is the V2X or SL communication with UE 2 may be performed according to resource scheduling.
- UE 1 transmits SCI (Sidelink Control Information) to UE 2 through a Physical Sidelink Control Channel (PSCCH), and then transmits data based on the SCI to UE 2 through a Physical Sidelink Shared Channel (PSSCH).
- SCI Segmentlink Control Information
- PSCCH Physical Sidelink Control Channel
- PSSCH Physical Sidelink Shared Channel
- the terminal can determine the SL transmission resource within the SL resource set by the base station / network or the preset SL resource.
- the configured SL resource or the preset SL resource may be a resource pool.
- the UE may autonomously select or schedule a resource for SL transmission.
- the terminal may perform SL communication by selecting a resource by itself within a set resource pool.
- the terminal may select a resource by itself within the selection window by performing a sensing (sensing) and resource (re)selection procedure.
- the sensing may be performed in units of subchannels.
- UE 1 which has selected a resource within the resource pool, transmits the SCI to UE 2 through the PSCCH, and may transmit data based on the SCI to UE 2 through the PSSCH.
- FIG. 9 illustrates three types of casts according to an embodiment of the present disclosure.
- the embodiment of FIG. 9 may be combined with various embodiments of the present disclosure.
- FIG. 9(a) shows broadcast type SL communication
- FIG. 9(b) shows unicast type SL communication
- FIG. 9(c) shows groupcast type SL communication.
- the terminal may perform one-to-one communication with another terminal.
- the terminal may perform SL communication with one or more terminals in a group to which the terminal belongs.
- SL groupcast communication may be replaced with SL multicast communication, SL one-to-many communication, or the like.
- a transmitting terminal may be a terminal transmitting data to a (target) receiving terminal (RX UE).
- the TX UE may be a terminal performing PSCCH and/or PSSCH transmission.
- the TX UE may be a terminal that transmits an SL CSI-RS and/or SL CSI report request indicator to a (target) RX UE.
- the TX UE is a (control) channel (eg, PSCCH, PSSCH) to be used for SL RLM (radio link monitoring) and/or SL RLF (radio link failure) operation of the (target) RX UE. etc.) and/or a UE transmitting a reference signal (eg, DM-RS, CSI-RS, etc.) on the (control) channel.
- a reference signal eg, DM-RS, CSI-RS, etc.
- the receiving terminal determines whether decoding of data received from the transmitting terminal (TX UE) succeeds and/or whether the TX UE transmits (PSSCH scheduling and It may be a terminal that transmits SL HARQ feedback to the TX UE according to whether or not the detection/decoding of the related) PSCCH succeeds.
- the RX UE may be a terminal that performs SL CSI transmission to the TX UE based on the SL CSI-RS and/or the SL CSI report request indicator received from the TX UE.
- the RX UE is measured based on a (pre-defined) reference signal and/or SL (L1 (layer 1)) RSRP (reference signal received power) report request indicator received from the TX UE.
- SL (L1) may be a terminal that transmits the RSRP measurement value to the TX UE.
- the RX UE may be a terminal that transmits its own data to the TX UE.
- the RX UE performs an SL RLM and/or SL RLF operation based on a (pre-established) (control) channel received from the TX UE and/or a reference signal on the (control) channel. It may be a terminal that does
- the RX UE when the RX UE transmits SL HARQ feedback information for the PSSCH and/or PSCCH received from the TX UE, the following scheme or some of the following schemes may be considered.
- the following scheme or some of the following schemes may be limitedly applied only when the RX UE successfully decodes/detects a PSCCH scheduling a PSSCH.
- Groupcast option 1 NACK (no acknowledgment) information may be transmitted to the TX UE only when the RX UE fails to decode/receive the PSSCH received from the TX UE.
- the TX UE may transmit the following information or some of the following information to the RX UE through SCI.
- the TX UE may transmit some or all of the following information to the RX UE through a first SCI (FIRST SCI) and/or a second SCI (SECOND SCI).
- FIRST SCI first SCI
- SECOND SCI second SCI
- SL (L1) RSRP reference signal received power
- SL (L1) RSRQ reference signal received quality
- SL (L1) RSSI reference signal strength indicator
- SL CSI transmission indicator (or SL (L1) RSRP (and / or SL (L1) RSRQ and / or SL (L1) RSSI) information transmission indicator)
- - Reference signal eg, DM-RS, etc.
- information related to decoding (and/or channel estimation) of data transmitted through the PSSCH may be information related to the pattern of the (time-frequency) mapping resource of the DM-RS, RANK information, antenna port index information, information on the number of antenna ports, and the like.
- the TX UE may transmit SCI, a first SCI (FIRST SCI) and/or a second SCI (SECOND SCI) to the RX UE through the PSCCH, so the PSCCH is the SCI , may be replaced/substituted with at least one of the first SCI and/or the second SCI.
- the SCI may be replaced/replaced by the PSCCH, the first SCI and/or the second SCI.
- the PSSCH may be replaced/substituted with the second SCI.
- the first SCI configuration field group is included.
- 1st SCI may be referred to as 1st SCI
- the second SCI including the second SCI configuration field group may be referred to as 2nd SCI.
- 1 st SCI may be transmitted to the receiving terminal through the PSCCH.
- 2nd SCI may be transmitted to the receiving terminal through (independent) PSCCH or may be piggybacked and transmitted together with data through PSSCH.
- configuration is from a base station or a network (via predefined signaling (eg, SIB, MAC, RRC, etc.)) ( Resource pool-specific) may mean (PRE)CONFIGURATION.
- predefined signaling eg, SIB, MAC, RRC, etc.
- Resource pool-specific may mean (PRE)CONFIGURATION.
- the RLF may be determined based on the OUT-OF-SYNCH (OOS) indicator or the IN-SYNCH (IS) indicator, so OUT-OF-SYNCH (OOS) or IN -SYNCH (IS) may be replaced/substituted.
- OOS OUT-OF-SYNCH
- IS IN-SYNCH
- RB may be replaced/substituted with SUBCARRIER.
- a packet (PACKET) or traffic (TRAFFIC) may be replaced/replaced with a TB or MAC PDU according to a transmission layer.
- CBG may be replaced/substituted with TB.
- SOURCE ID may be replaced/replaced with DESTINATION ID.
- the L1 ID may be replaced/substituted with the L2 ID.
- the L1 ID may be an L1 SOURCE ID or an L1 DESTINATION ID.
- the L2 ID may be an L2 SOURCE ID or an L2 DESTINATION ID.
- the operation of the transmitting terminal to reserve/select/determine the retransmission resource is a potential that the transmitting terminal will actually use based on the SL HARQ feedback information received from the receiving terminal.
- POTENTIAL may refer to an operation of reserving/selecting/determining a retransmission resource.
- the SUB-SELECTION WINDOW may be substituted/replaced with a resource set of a preset number within the SELECTION WINDOW and/or the SELECTION WINDOW.
- SL MODE 1 is a resource allocation method or communication method in which the base station directly schedules the sidelink transmission (SL TX) resource of the terminal through predefined signaling (eg, DCI).
- SL MODE 2 may mean a resource allocation method or a communication method in which the terminal independently selects an SL TX resource from a base station or a network, or independently from a preset resource pool.
- a terminal performing SL communication based on SL MODE 1 may be referred to as MODE 1 UE or MODE 1 TX UE
- a terminal performing SL communication based on SL MODE 2 may be referred to as MODE 2 UE or MODE 2 TX It may be referred to as a UE.
- a dynamic grant may be substituted/substituted with a configured grant (CONFIGURED GRANT, CG) and/or an SPS grant (SPS GRANT).
- the dynamic grant may be substituted/substituted with a combination of the configured grant (CONFIGURED GRANT) and the SPS grant (SPS GRANT).
- the configured grant may include at least one of a configured grant type 1 (CONFIGURED GRANT TYPE 1) and/or a configured grant type 2 (CONFIGURED GRANT TYPE 2).
- the grant may be provided by RRC signaling and may be stored as the configured grant.
- the grant may be provided by the PDCCH, and may be stored or deleted as a configured grant based on L1 signaling indicating activation or deactivation of the grant.
- a channel may be substituted/substituted with a signal.
- transmission/reception of a channel may include transmission/reception of a signal.
- transmission/reception of a signal may include transmission/reception of a channel.
- the cast may be replaced/replaced with at least one of unicast, groupcast, and/or broadcast.
- the cast type may be substituted/substituted with at least one of unicast, groupcast, and/or broadcast.
- resources may be interchanged/replaced with slots or symbols.
- a resource may include a slot and/or a symbol.
- the priority is LCP (logical channel priority), delay (latency), reliability (reliability), minimum required communication range (minimum required communication range), PPPP (prose per-packet priority), SLRB (sidelink radio bearer), QoS profile (profile) / parameters (parameter) and / or requirements (requirement) may be replaced / replaced with each other.
- the reservation resource and/or the selection resource may be replaced/replaced with an SL GRANT (sidelink grant).
- latency may be replaced/replaced with a packet delay budget (PDB).
- PDB packet delay budget
- SL_CSI information sidelink channel state information/sidelink channel quality information
- CSI-RS sidelink channel state information reference signal
- blind retransmission may mean that the TX UE performs retransmission without receiving SL HARQ feedback information from the RX UE.
- retransmission based on SL HARQ feedback may mean that the TX UE determines whether to perform retransmission based on SL HARQ feedback information received from the RX UE. For example, when the TX UE receives NACK and/or DTX information from the RX UE, the TX UE may perform retransmission to the RX UE.
- a (physical) channel used when the RX UE transmits at least one of the following information to the TX UE may be referred to as a PSFCH.
- the Uu channel may include a UL channel and/or a DL channel.
- the UL channel may include PUSCH, PUCCH, SRS, and the like.
- the DL channel may include PDCCH, PDSCH, PSS/SSS, and the like.
- the SL channel may include PSCCH, PSSCH, PSFCH, PSBCH, PSSS/SSSS, and the like.
- the transmitting terminal may reserve/select one or more transmission resources for sidelink transmission (eg, initial transmission and/or retransmission), and the transmitting terminal may transmit the one or more transmissions Information on the location of the resource may be notified to the receiving terminal.
- sidelink transmission e.g, initial transmission and/or retransmission
- a method for the transmitting terminal to reserve or pre-determine a transmission resource for the receiving terminal may typically have the following form.
- the transmitting terminal may perform the reservation of the transmission resource based on a chain. Specifically, for example, when the transmitting terminal performs reservation of K transmission resources, the transmitting terminal transmits less than K transmission resources to the receiving terminal at any (or specific) transmission time point or time resource through SCI. location information may be transmitted or informed to the receiving terminal. That is, for example, the SCI may include location information of less than the K transmission resources. Or, for example, when the transmitting terminal performs reservation of K transmission resources related to a specific TB, the transmitting terminal transmits more than K through SCI to the receiving terminal at any (or specific) transmission time or time resource. Location information of a small transmission resource may be informed or transmitted to the receiving terminal.
- the SCI may include location information of less than the K transmission resources.
- the transmitting terminal signals only the location information of less than K transmission resources to the receiving terminal through one SCI transmitted at any (or specific) transmission time point or time resource, SCI payload performance degradation due to excessive increase of
- FIG. 10 is a diagram illustrating a method in which a terminal that has reserved a transmission resource informs another terminal of information related to the transmission resource, according to an embodiment of the present disclosure.
- the embodiment of FIG. 10 may be combined with various embodiments of the present disclosure.
- the transmitting terminal transmits/signals (maximum) two pieces of transmission resource location information to the receiving terminal through one SCI. Indicates how to perform resource reservation. For example, in (b) of FIG. 10, when the K value is 4, the transmitting terminal transmits/signals (maximum) three pieces of transmission resource location information to the receiving terminal through one SCI, thereby making a chain-based resource reservation. indicates how to do it. For example, referring to (a) and (b) of FIG. 10 , the transmitting terminal may transmit/signal only the fourth transmission-related resource location information to the receiving terminal through the fourth (or last) transmission-related PSCCH. . For example, referring to (a) of FIG.
- the transmitting terminal additionally receives the third transmission-related resource location information as well as the fourth transmission-related resource location information through the fourth (or last) transmission-related PSCCH. can be transmitted/signaled to For example, referring to (b) of FIG. 10, the transmitting terminal through the fourth (or last) transmission-related PSCCH, as well as the fourth transmission-related resource location information, the second transmission-related resource location information and the third transmission Related resource location information may be additionally transmitted/signaled to the receiving terminal. At this time, for example, in FIGS.
- the terminal may set or designate a location information field/bit of an unused or remaining transmission resource to a preset value (eg, 0).
- a preset value eg, 0
- the transmitting terminal when the transmitting terminal transmits/signals only the fourth transmission-related resource location information to the receiving terminal through the fourth (or last) transmission-related PSCCH, the transmitting terminal is It can be set or specified to indicate a preset status/bit value indicating that the location information field/bit of an unused or remaining transmission resource is the last transmission (out of 4 transmissions).
- the transmitting terminal may perform the reservation of the transmission resource based on the block (block). Specifically, for example, when the transmitting terminal performs reservation of K transmission resources, the transmitting terminal relates to K transmission resources through SCI transmitted to the receiving terminal at any (or specific) transmission time or time resource. All location information may be transmitted or informed to the receiving terminal. That is, the SCI may include location information of the K transmission resources. For example, when the transmitting terminal performs reservation of K transmission resources related to a specific TB, the transmitting terminal performs K transmission resources and All related location information may be transmitted or informed to the receiving terminal. That is, the SCI may include location information of the K transmission resources. For example, (c) of FIG. 10 shows a method of performing block-based resource reservation by signaling, by the transmitting terminal, four pieces of transmission resource location information to the receiving terminal through one SCI when the K value is 4 .
- the SL DRX configuration may include one or more pieces of information listed below.
- SL drx-onDurationTimer may be information about the duration at the beginning of a DRX Cycle.
- the start period of the DRX cycle may be information on the period in which the terminal operates in the active mode to transmit or receive sidelink data.
- SL drx-SlotOffset may be information on the delay before starting the drx-onDurationTimer of the DRX-on duration timer.
- SL drx-InactivityTimer indicates a new sidelink transmission and reception for the MAC entity after the duration after the PSCCH occasion in which a PSCCH indicates a new sidelink transmission and reception for the MAC. entity).
- the transmitting terminal instructs PSSCH transmission through the PSCCH
- the transmitting terminal operates in an active mode while SL drx-InactivityTimer is operating, so that the transmitting terminal may transmit the PSSCH to the receiving terminal.
- the receiving terminal when the receiving terminal is instructed that the transmitting terminal transmits the PSSCH through PSCCH reception, the receiving terminal operates in an active mode while SL drx-InactivityTimer is operating, so that the receiving terminal receives the PSSCH from the transmitting terminal can do.
- SL drx-RetransmissionTimer may be information on the maximum duration until a retransmission is received.
- the SL drx-RetransmissionTimer may be set for each HARQ process.
- SL drx-LongCycleStartOffset defines the subframe where the Long and Short DRX cycle begins. Cycle starts).
- SL drx-ShortCycle may be information on the Short DRX cycle.
- SL drx-ShortCycle may be optional information.
- the SL drx-ShortCycleTimer may be information on the duration the UE shall follow the Short DRX cycle.
- SL drx-ShortCycleTimer may be optional information.
- the SL drx-HARQ-RTT-Timer may be information about the minimum duration before an assignment for HARQ retransmission is expected by the MAC entity.
- the SL drx-HARQ-RTT-Timer may be configured for each HARQ process.
- an SL DRX timer and/or Re-set/extension of the active time may be performed.
- the SL HARQ feedback operation may include PSFCH transmission and/or PSFCH reception.
- the NACK ONLY based SL HARQ feedback operation may be an operation of transmitting NACK information to the TX UE only when the RX UE fails to decode/receive the PSSCH received from the TX UE.
- some or all of the plurality of PSFCH transmissions may be omitted.
- a plurality of PSFCHs according to the priority of PSSCH and/or SL data linked to the PSFCH and the maximum number of PSFCHs capable of simultaneous transmission of the UE Some or all of the transmission may be omitted.
- PSFCH transmission and PSFCH reception overlap on the same time point, the priority of PSSCH and/or SL data linked to the PSFCH and the maximum number of PSFCHs capable of simultaneous transmission of the UE.
- PSFCH transmission Alternatively, PSFCH reception may be omitted.
- the priority of PSSCH and/or SL data interlocked with PSFCH when PSFCH transmission and UL control/data transmission overlap on the same time point, the priority of PSSCH and/or SL data interlocked with PSFCH, the priority of UL control/data and the simultaneous UE
- PSFCH transmission may be omitted.
- the UL control/data may include a UL channel through which SL HARQ feedback, SL BSR, and/or SL SR are transmitted/piggybacked.
- the priority of PSSCH and/or SL data linked to the PSFCH when PSFCH reception and UL transmission overlap on the same time point, the priority of PSSCH and/or SL data linked to the PSFCH, the priority of UL control/data and simultaneous transmission of the UE are possible
- PSFCH reception may be omitted.
- the UL control/data may include a UL channel through which SL HARQ feedback, SL BSR, and/or SL SR are transmitted/piggybacked.
- NR PSFCH NR PSFCH transmission/reception may be omitted according to the priority of NR PSSCH and/or NR SL data linked to, the priority of LTE SL channel/signal, and the maximum number of PSFCHs that can be simultaneously transmitted by the UE.
- the RX UE performing the SL DRX operation performs the NACK ONLY based PSFCH transmission operation
- the TX UE indicates that the RX UE successfully receives the MAC PDU. , and an additional retransmission operation may not be performed.
- the RX UE has not yet succeeded in receiving the MAC PDU, a problem of re-setting/extending the SL DRX timer and/or the active time may occur.
- the problem is whether or not to perform re-configuration/extension of the SL DRX timer and/or active time of the RX UE is not determined depending on whether the NACK is actually transmitted through the PSFCH, but for the MAC PDU
- the cause may be determined according to reception/decoding failure.
- various embodiments of the present disclosure to be described later may be applied.
- the RX UE performing the SL DRX operation re-configures the SL DRX timer and / or active time only when NACK transmission is actually performed through the PSFCH resource. /extension can be performed.
- the RX UE performing the SL DRX operation only when the NACK transmission is actually performed through the PSFCH resource, the SL related to the SL HARQ process associated with the NACK transmission. Re-setting/extension of the DRX timer and/or active time may be performed.
- the RX UE when NACK transmission is omitted, the RX UE performs re-configuration/extension for the SL DRX timer and/or active time related to the SL HARQ process associated with NACK transmission. may not
- the RX UE performing the SL DRX operation fails to receive/decode the MAC PDU, regardless of whether or not the actual NACK is transmitted through the PSFCH resource. If so, re-configuration/extension of the SL DRX timer and/or active time may be performed.
- the ACK/ANCK-based SL HARQ feedback operation is when the RX UE succeeds in decoding/receiving the PSSCH received from the TX UE, transmits ACK information to the TX UE, and when decoding/receiving the PSSCH fails, the TX UE It may be an operation of transmitting NACK information to For example, when an ACK/NACK-based SL HARQ feedback operation is performed in groupcast, the RX UE performing the SL DRX operation fails to receive/decode the MAC PDU related to the PSFCH transmission even if the PSFCH transmission is omitted.
- Re-configuration/extension of the SL DRX timer and/or active time related to the SL HARQ process associated with PSFCH transmission may be performed. Additionally, for example, when an ACK/NACK-based SL HARQ feedback operation is performed, the RX UE performing the SL DRX operation even if PSFCH transmission (eg, ACK or NACK) is omitted, the SL DRX timer and / Alternatively, re-establishment/extension of the active time may be performed.
- PSFCH transmission eg, ACK or NACK
- the TX UE regards it as DTX and/or NACK and performs retransmission. In a section in which there is no retransmission of the UE, a problem of meaninglessly performing a retransmission reception operation may not occur.
- an RX UE performing a NACK ONLY based SL HARQ feedback operation may omit NACK transmission due to a relatively high priority SL channel/signal reception operation.
- the RX UE checks/detects whether NACK transmission of another UE is performed on the PSFCH resource, if NACK transmission of another UE is performed, although the RX UE itself does not perform NACK transmission, SL DRX Timer and/or active time reset/extend operation may be performed.
- the SL channel/signal may include at least one of a PSFCH or an LTE SL channel/signal.
- the LTE SL channel/signal may include at least one of PSSCH, PSCCH, or SL synchronization signal.
- an RX UE performing a NACK ONLY-based SL HARQ feedback operation is a relatively high priority SL channel/signal reception operation Therefore, NACK transmission can be omitted.
- NACK transmission can be omitted.
- the PSFCH resource related to the NACK transmission it is possible to check/detect whether NACK transmission by another member UE in the same groupcast is performed.
- the SL DRX timer and/or the active time related to the SL HARQ process associated with the NACK transmission re-set/extend operation can be performed.
- a UE performing an SL DRX operation may regard a PSFCH transmission operation satisfying the following specific condition as higher priority than other PSFCH reception operations.
- the RX UE performing the SL DRX operation may regard a PSFCH transmission and/or PSFCH reception operation satisfying the following specific condition as higher priority than other PSFCH reception and/or transmission operations.
- other PSFCH reception and/or transmission may be PSFCH reception and/or transmission related to a preset service type.
- the other PSFCH reception and/or transmission may be a PSFCH reception and/or transmission related to a priority of an LCH or service higher than a preset threshold level.
- the other PSFCH reception and/or transmission may be a PSFCH reception and/or transmission related to a QoS requirement (eg, reliability, latency) higher than a preset threshold level.
- the other PSFCH reception and/or transmission may be a PSFCH reception and/or transmission related to a QoS requirement (eg, reliability, latency) lower than a preset threshold level.
- the RX UE performing the SL DRX operation may regard the PSFCH transmission and/or PSFCH reception operation satisfying the following specific condition as higher priority than the UL control/data transmission and/or reception operation.
- the UL control/data may include a UL channel through which SL HARQ feedback, SL BSR, and/or SL SR are transmitted/piggybacked.
- the RX UE performing the SL DRX operation performs a PSFCH transmission and/or PSFCH reception operation that satisfies the following specific conditions for LTE SL channel/signal (eg, PSCCH, PSSCH, SL synchronization signal) for transmission and / or it may be considered as a higher priority than the receive operation.
- LTE SL channel/signal eg, PSCCH, PSSCH, SL synchronization signal
- the specific condition may be NACK ONLY based SL HARQ feedback.
- the RX UE transmits and/or receives NACK ONLY-based SL HARQ feedback of the groupcast, it may determine with higher priority than other PSFCH transmission and/or reception operations.
- the specific condition may be ACK/NACK-based SL HARQ feedback.
- the RX UE transmits and/or receives the ACK/NACK-based SL HARQ feedback of the groupcast, it may be determined with a higher priority than other PSFCH transmission and/or reception operations.
- the specific condition may be SL HARQ feedback transmission and/or reception.
- the RX UE transmits and/or receives the SL HARQ feedback, it may be determined with a higher priority than other PSFCH transmission and/or reception operations.
- the specific condition may be groupcast communication.
- the RX UE when the RX UE performs transmission and/or reception for a PSFCH related to groupcast communication, it may be determined with a higher priority than other PSFCH transmission and/or reception operations.
- SL channel/signal transmission and/or reception eg, PSFCH transmission
- PSFCH transmission related to a groupcast composed of a relatively large number of members is higher than that of transmission and/or reception related to other groupcasts. can be considered a priority.
- an SL channel/signal transmission and/or reception eg PSFCH transmission
- a groupcast consisting of a greater number of members than a preset threshold value
- transmission related to another groupcast unicast or broadcast and/or may be considered high priority over reception.
- the specific condition may be unicast communication.
- the RX UE when the RX UE performs transmission and/or reception for a PSFCH related to unicast communication, it may be determined with a higher priority than other PSFCH transmission and/or reception operations.
- the specific condition may be broadcast communication.
- the RX UE when the RX UE performs transmission and/or reception for a PSFCH related to broadcast communication, it may be determined with a higher priority than other PSFCH transmission and/or reception operations.
- the specific condition may be PSFCH transmission and/or reception of a preset service type.
- the specific condition may be PSFCH transmission and/or reception with a priority of an LCH or service higher than a preset threshold level.
- the specific condition may be transmission and/or reception of a PSFCH with QoS requirements (eg, reliability, latency) higher than a preset threshold level.
- the specific condition may be transmission and/or reception of a PSFCH with QoS requirements (eg, reliability, latency) lower than a preset threshold level.
- the following embodiments may be applied to the RX UE performing the SL DRX operation on a reservation resource (hereinafter, RSR_RSC) located after the time point when the SL DRX timer and/or active time expires.
- RSR_RSC may be a reserved resource signaled by the previous SCI.
- RSR_RSC may be a reserved resource located after the SL DRX timer and/or active time associated with the interlocked SL HARQ process ends.
- the above-described embodiment of the present disclosure may be applied when the RX UE omits the related PSFCH transmission with respect to a MAC PDU received on a reserved resource before RSR_RSC.
- the RX UE transmits a related PSFCH due to a relatively high priority channel transmission and/or reception operation (for example, it may be applied when ACK information transmission) is omitted.
- the reserved resource before RSR_RSC may be a reserved resource before the SL DRX timer associated with the interlocked SL HAQR process expires.
- the reserved resource before RSR_RSC may be a reserved resource within the active time interval related to the interlocked SL HAQR process.
- the above-described embodiment of the present disclosure may be applied when the RX UE actually successfully receives the PSCCH and/or PSSCH retransmission from the TX UE on RSR_RSC.
- the TX UE regards it as DTX and/or NACK and performs retransmission, thereby excessively large or meaningful It is possible to alleviate the problem of performing retransmission without For example, when an embodiment of the present disclosure is applied, if the RX UE omits the PSFCH transmission for the successfully received MAC PDU, the TX UE considers it as DTX and/or NACK and performs retransmission. Alternatively, the problem of performing retransmission without meaning may be alleviated.
- the TX UE when an embodiment of the present disclosure is applied, if the TX UE does not successfully receive the PSFCH of the ACK information actually transmitted by the RX UE, the TX UE considers it as DTX and/or NACK and performs retransmission, It is possible to alleviate the problem of performing excessively many or meaningless retransmissions.
- the RX UE when the RX UE performs an ACK/NACK-based SL HARQ feedback operation, when a packet related to an LCH or service having a priority above a preset threshold level is transmitted, priority below a preset threshold level When packets related to LCH or services with a priority are transmitted, when packets related to QoS requirements (e.g.
- the RX UE may additionally perform PSSCH and/or PSCCH decoding on RSR_RSC, and then transmit ACK information on a PSFCH resource associated with RSR_RSC.
- ACK information may always be transmitted on the PSFCH resource linked to the RSR_RSC.
- the RX UE additionally performs PSSCH and/or PSCCH decoding related to the TX UE on a slot related to RSR_RSC, and then, depending on whether the actual PSSCH and/or PSCCH decoding succeeds, on the PSFCH resource associated with the RSR_RSC.
- ACK/NACK information may be transmitted.
- the additional PSSCH and/or PSCCH decoding may be performed for a frequency domain related to RSR_RSC.
- the additional PSSCH and/or PSCCH decoding may be performed for all frequency domains in the resource pool.
- the RX UE when PSCCH and/or PSSCH related to another TX UE is detected/decoded on a slot related to RSR_RSC, the RX UE is an SL DRX timer and/or active time of an SL HARQ process related to PSCCH and/or PSSCH. may not be re-set/extended.
- the RX UE when PSCCH and/or PSSCH related to another TX UE is detected/decoded on a slot related to RSR_RSC, the RX UE is an SL DRX timer and/or active time of an SL HARQ process related to PSCCH and/or PSSCH. can be re-set/extended.
- the RX UE may transmit ACK information on a PSFCH resource associated with RSR_RSC without additionally performing PSSCH and/or PSCCH decoding on RSR_RSC.
- the RX UE does not additionally perform PSSCH and/or PSCCH decoding related to the TX UE in the RSR_RSC related frequency domain on the RSR_RSC related SLOT, and may transmit ACK information on the PSFCH resource associated with the RSR_RSC.
- the RX UE does not additionally perform PSSCH and/or PSCCH decoding related to the TX UE on the RSR_RSC related SLOT for all frequency domains in the resource pool, and may transmit ACK information on the PSFCH resource associated with the RSR_RSC. have.
- the number of RSR_RSCs for which the RX UE performs PSFCH transmission and/or ACK information transmission may be set differently or independently according to a service type, priority, and congestion level in the resource pool.
- the number of RSR_RSCs may be the maximum number.
- the number of RSR_RSCs may be the minimum number.
- the number of RSR_RSCs may be an average number.
- the RX UE applies the various embodiments of the present disclosure described above, whether the TX UE is a terminal performing SL DRX operation, whether the TX UE is a power saving terminal, RX UE before RSR_RSC For a MAC PDU successfully received on a reserved resource before the SL DRX timer associated with the interlocked SL HARQ process of For the MAC PDU successfully received on the reserved resource before the timer expires, it may be set differently depending on whether ACK information transmission is performed.
- the RX UE may apply various embodiments of the present disclosure described above. For example, when the RX UE actually transmits ACK information for a MAC PDU successfully received on a reserved resource before the SL DRX timer associated with the SL HARQ process associated with RSR_RSC expires, various embodiments of the present disclosure provide may not apply. For example, when the RX UE actually transmits ACK information for a MAC PDU successfully received on a reserved resource within an active time interval related to an interlocked SL HARQ process before RSR_RSC, various embodiments of the present disclosure may not be applied. can
- whether various embodiments of the present disclosure are applied may be determined by a service type, LCH-related priority, service-related priority, QoS requirements (eg, latency, reliability, minimum communication range), PQI parameters, HARQ LCH/MAC PDU transmission with feedback enabled, LCH/MAC PDU transmission with HARQ feedback disabled, CBR measurement value of resource pool, SL cast type (eg, unicast, groupcast, broadcast), SL group Cast HARQ feedback options (eg, NACK ONLY-based feedback, ACK/NACK-based feedback, TX-RX distance-based NACK ONLY feedback), SL mode 1 CG type (eg, SL CG type 1, SL CG type 2) , SL mode type (eg, mode 1, mode 2), resource pool, whether the PSFCH resource is a configured resource pool, source ID, destination ID, source L2 ID, destination L2 ID, PC5 RRC connection link, SL Link, connection state with the base station (eg, RRC CONNECTED state, IDLE state, INACT
- parameter setting values related to various embodiments of the present disclosure include service type, LCH-related priority, service-related priority, QoS requirements (eg, latency, reliability, minimum communication range), PQI parameters , LCH / MAC PDU transmission with HARQ feedback enabled, LCH / MAC PDU transmission with HARQ feedback disabled, CBR measurement value of resource pool, SL cast type (eg, unicast, groupcast, broadcast), SL groupcast HARQ feedback option (eg, NACK ONLY-based feedback, ACK/NACK-based feedback, TX-RX distance-based NACK ONLY feedback), SL mode 1 CG type (eg, SL CG type 1, SL CG type) 2), SL mode type (eg, mode 1, mode 2), resource pool, whether PSFCH resource is a configured resource pool, source ID, destination ID, source L2 ID, destination L2 ID, PC5 RRC connection link , SL link, connection state with the base station (eg, RRC CONNECTED state, IDLE state,
- “configuration” or “designation” indicates that the base station informs the terminal through a pre-defined channel/signal (eg, SIB, RRC, MAC CE). It can mean form.
- “configuration” or “designation” may mean a form provided through PRE-CONFIGURATION.
- “configuration” or “designation” may be a form in which the UE informs other UEs through a predefined channel/signal (eg, SL MAC CE, PC5 RRC).
- the channel/signal may include a channel/signal for a physical layer or a higher layer.
- PSFCH may be replaced with at least one of NR PSSCH, NR PSCCH, NR SL SSB, LTE PSSCH, LTE PSCCH, LTE SL SSB, and UL channel/signal.
- the aforementioned SL DRX timer may be used for the following purposes.
- the SL DRX duration timer may be used in a period in which the UE performing the SL DRX operation basically needs to operate as an active time to receive the PSCCH/PSSCH of the counterpart UE.
- the SL DRX deactivation timer may be used in a period for extending the SL DRX duration period, which is a period in which a UE performing SL DRX operation should basically operate as an active time to receive a PSCCH/PSSCH of a counterpart UE. That is, for example, the SL DRX on-duration timer may be extended by the SL DRX deactivation timer period. Also, when the UE receives a new packet (eg, a new PSSCH) from the counterpart UE, the UE may start the SL DRX deactivation timer to extend the SL DRX duration timer.
- a new packet eg, a new PSSCH
- the SL DRX HARQ RTT timer may be used in a period in which a UE performing SL DRX operation operates in a sleep mode until it receives a retransmission packet (or PSSCH assignment) transmitted by a counterpart UE. That is, for example, when the UE starts the SL DRX HARQ RTT timer, the counterpart UE determines that it will not transmit a sidelink retransmission packet to itself until the SL DRX HARQ RTT timer expires, and the UE determines that during the timer It can operate in sleep mode.
- the SL DRX retransmission timer may be used in an active time period for a UE performing SL DRX operation to receive a retransmission packet (or PSSCH assignment) transmitted from a counterpart UE.
- the UE may monitor reception of a retransmission sidelink packet (or PSSCH allocation) transmitted by the counterpart UE.
- 'Onduration' operates in an Active Time (wake up state (RF module is "on”) to receive/transmit a wireless signal).
- section may be a section.
- 'Offduration is a sleep time (Sleep Time) (interval operating in a sleep mode state (RF module is “off”) for power saving, and the transmitting UE is obligated to sleep mode during the sleep time period It does not mean that it should operate, but if necessary, even in the sleep time, it may be a period (allowing to operate as an active time for a short time for a sensing operation/transmission operation).
- a “constant time” may be a time during which the UE operates as an active time for a predefined time in order to receive a sidelink signal or sidelink data from a counterpart UE.
- a period of time is a timer (SL DRX retransmission timer, SL DRX inactivity timer, RX UE's DRX operation) for the UE to receive a sidelink signal or sidelink data from the other UE as active time. It may be a time that operates as an active time as much as the timer) time guaranteed to be able to do so.
- FIG. 11 illustrates a procedure in which a receiving terminal starts a timer related to SL DRX according to an embodiment of the present disclosure.
- the embodiment of FIG. 11 may be combined with various embodiments of the present disclosure.
- a receiving terminal may obtain an SL DRX configuration.
- the receiving terminal may receive the SL DRX configuration from the base station.
- the receiving terminal may receive the SL DRX configuration from the transmitting terminal.
- the SL DRX configuration may include information about a cycle related to SL DRX and information about a timer related to SL DRX.
- the SL DRX related timer may include at least one of an SL DRX duration timer, an SL DRX deactivation timer, an SL DRX HARQ RTT timer, or an SL DRX retransmission timer.
- the receiving terminal may receive the first SCI for scheduling the first PSSCH through the first PSCCH from the transmitting terminal.
- the receiving terminal may receive the second SCI and the first data through the first PSSCH from the transmitting terminal. For example, the receiving terminal may determine the first PSFCH resource based on the index of the slot and the index of the subchannel related to the first PSSCH.
- the receiving terminal may omit transmission of the first PSFCH related to the first PSSCH. For example, when a plurality of PSFCH transmissions overlap on the same time point, based on the priority of SL data related to the PSFCH and the maximum number of PSFCHs that the receiving terminal can transmit simultaneously, at least one PSFCH transmission is omitted from among the plurality of PSFCH transmissions.
- the at least one PSFCH transmission may include a first PSFCH transmission.
- the first PSFCH transmission may be omitted based on the priority of the SL data related to the PSFCH and the maximum number of PSFCHs that the receiving terminal can transmit at the same time. .
- the first PSFCH transmission and UL control/data transmission overlap on the same time point, the priority of the SL data related to the PSFCH, the priority related to the UL transmission, and the maximum number of PSFCHs that the receiving terminal can transmit at the same time.
- the first PSFCH transmission may be omitted.
- UL transmission may include a UL channel through which SL HARQ feedback, SL BSR, and/or SL SR are transmitted/piggybacked.
- the receiving terminal may start the first timer included in the SL DRX configuration based on the omission of the first PSFCH transmission related to the first PSSCH on the first PSFCH resource.
- the first PSFCH may include either ACK or NACK.
- the first timer may include at least one of an SL DRX HARQ RTT timer or an SL DRX retransmission timer.
- the receiving terminal may transmit an ACK to the transmitting terminal.
- decoding for the first PSSCH may be additionally performed on a reserved resource located after the first timer expires.
- the receiving terminal may transmit an ACK to the transmitting terminal.
- the number of reserved resources located after the first timer expires may be set differently based on at least one of a service type, a priority, or a degree of congestion in the resource pool.
- FIG. 12 illustrates another procedure in which a receiving terminal starts a timer related to SL DRX according to an embodiment of the present disclosure.
- the embodiment of FIG. 12 may be combined with various embodiments of the present disclosure.
- the receiving terminal may obtain an SL DRX configuration.
- the receiving terminal may receive the SL DRX configuration from the base station.
- the receiving terminal may receive the SL DRX configuration from the transmitting terminal.
- the SL DRX configuration may include information about a cycle related to SL DRX and information about a timer related to SL DRX.
- the SL DRX related timer may include at least one of an SL DRX duration timer, an SL DRX deactivation timer, an SL DRX HARQ RTT timer, or an SL DRX retransmission timer.
- the receiving terminal may receive the first SCI for scheduling the first PSSCH through the first PSCCH from the transmitting terminal.
- the receiving terminal may receive the second SCI and the first data from the transmitting terminal through the first PSSCH.
- the receiving terminal may determine the first PSFCH resource based on the index of the slot and the index of the subchannel related to the first PSSCH.
- the receiving terminal may perform ACK/NACK-based HARQ feedback through the first PSFCH.
- the receiving terminal may receive a third SCI for scheduling the second PSSCH through the second PSCCH from the transmitting terminal.
- the receiving terminal may receive the fourth SCI and the second data through the second PSSCH from the transmitting terminal.
- the receiving terminal may determine the second PSFCH resource based on the index of the slot and the index of the subchannel related to the second PSSCH.
- the receiving terminal may perform NACK ONLY-based HARQ feedback through the second PSFCH.
- the receiving terminal may omit the first PSFCH transmission related to the first PSSCH, and the receiving terminal may omit the second PSFCH transmission related to the second PSSCH.
- the first PSFCH transmission may be omitted as in the examples of step S1140 described above.
- the second PSFCH transmission may be omitted as in the examples of step S1140 described above.
- the receiving terminal may start the first timer included in the SL DRX configuration based on the omission of the first PSFCH transmission related to the first PSSCH on the first PSFCH resource.
- the receiving terminal may not start the second timer included in the SL DRX configuration based on the omission of the second PSFCH transmission related to the second PSSCH on the second PSFCH resource.
- the first PSFCH may include either ACK or NACK.
- the second PSFCH may include only NACK.
- the first timer may include at least one of an SL DRX HARQ RTT timer or an SL DRX retransmission timer.
- the second timer may include at least one of an SL DRX HARQ RTT timer or an SL DRX retransmission timer.
- the receiving terminal may start the second timer based on the transmission of the third PSFCH related to the second data by another terminal.
- the other terminal may be a terminal performing the same group cast communication as the receiving terminal.
- the third PSFCH may include only NACK. For example, if the third PSFCH transmission related to the second data is not performed by another terminal, step S1260 may be omitted.
- the receiving terminal may transmit an ACK to the transmitting terminal.
- decoding for the first PSSCH may be additionally performed on a reserved resource located after the first timer expires.
- the receiving terminal may transmit an ACK to the transmitting terminal.
- the number of reserved resources located after the first timer expires may be set differently based on at least one of a service type, a priority, or a degree of congestion in the resource pool.
- FIG. 13 illustrates an example of a reserved resource in which a receiving terminal is located after a timer related to SL DRX expires, according to an embodiment of the present disclosure.
- the embodiment of FIG. 12 may be combined with various embodiments of the present disclosure.
- the receiving terminal when the receiving terminal omits the first PSFCH transmission for the first data received from the transmitting terminal, the receiving terminal may start a first SL DRX timer related to the first PSFCH transmission.
- the first SL DRX timer may be at least one of an SL DRX HARQ RTT timer or an SL DRX retransmission timer.
- the first SL DRX active time may be an active time associated with the first SL DRX timer.
- the transmitting terminal interworks with the first PSFCH first Data may be determined by discontinuous detection (DTX). Also, for example, after the first SL DRX timer expires, the receiving terminal may transmit an ACK for the first data to the transmitting terminal based on the reserved resource.
- DTX discontinuous detection
- the receiving terminal performs decoding for the first data on a reserved resource, and the decoding is successfully performed, the receiving terminal is a transmitting terminal based on the reserved resource after the first SL DRX timer expires ACK for the first data may be transmitted to
- the reserved resource may be located within the second SL DRX active time.
- the second SL DRX active time may be an active time for SL communication between the receiving terminal and another device or an active time for transmitting and receiving data different from the first data.
- the receiving terminal may not start the first SL DRX timer.
- the receiving terminal may still start the HARQ RTT timer in a symbol or slot after the end of the PSFCH resource. For example, the receiving terminal may not transmit the PSFCH due to UL/SL prioritization.
- PSFCH transmission eg, NACK
- the SL DRX retransmission timer may not be started.
- PSFCH transmission may be dropped due to UL/SL prioritization.
- FIG. 14 illustrates a method for a first device to start a timer related to SL DRX, according to an embodiment of the present disclosure.
- the embodiment of FIG. 14 may be combined with various embodiments of the present disclosure.
- the first device 100 may acquire an SL sidelink discontinuous reception (SL DRX) configuration.
- SL DRX SL sidelink discontinuous reception
- step S1420 the first device 100 performs a first SCI (sidelink control information) for scheduling a first physical sidelink shared channel (PSSCH) through a first physical sidelink control channel (PSCCH) from the second device 200 can receive
- SCI sidelink control information
- the first device 100 may receive the second SCI and first data from the second device 200 through the first physical sidelink shared channel (PSSCH).
- PSSCH physical sidelink shared channel
- the first device 100 may determine a first physical sidelink feedback channel (PSFCH) resource based on the index of the slot and the index of the subchannel related to the first PSSCH.
- PSFCH physical sidelink feedback channel
- a first timer included in the SL DRX configuration may be started.
- the first PSFCH may include either an acknowledgment (ACK) or a negative acknowledgment (NACK).
- ACK acknowledgment
- NACK negative acknowledgment
- the first timer may include at least one of an SL DRX hybrid automatic repeat request (HARQ) round trip time (RTT) timer or an SL DRX retransmission timer.
- HARQ hybrid automatic repeat request
- RTT round trip time
- the first device 100 may receive the third SCI for scheduling the second PSSCH through the second PSCCH.
- the first device 100 may receive the fourth SCI and the second data through the second PSSCH.
- the first device 100 may determine the second PSFCH resource based on the index of the slot and the index of the subchannel related to the second PSSCH.
- the second timer included in the SL DRX configuration may not be started based on the omission of the second PSFCH transmission related to the second PSSCH on the second PSFCH resource.
- the second PSFCH may include only NACK.
- the second timer may include at least one of an SL DRX HARQ RTT timer or an SL DRX retransmission timer.
- the second timer may be started based on the transmission of the third PSFCH related to the second data by the third device.
- the third device may be a device that performs the same group cast communication as the first device.
- the ACK may be transmitted based on a reserved resource located after the first timer expires.
- decoding for the first PSSCH may be additionally performed on a reserved resource located after the first timer expires.
- an ACK may be transmitted based on the successful decoding.
- the number of reserved resources located after the first timer expires may be set differently based on at least one of a service type, a priority, or a degree of congestion in the resource pool.
- the second PSFCH transmission may be omitted.
- the second PSFCH transmission and the third PSFCH transmission may be related to groupcast communication.
- the number of groupcast members related to the third PSFCH transmission may be greater than the number of groupcast members related to the second PSFCH transmission.
- the processor 102 of the first apparatus 100 may obtain a sidelink discontinuous reception (SL DRX) configuration. And, for example, the processor 102 of the first device 100 is configured to schedule a first physical sidelink shared channel (PSSCH) from the second device 200 through a first physical sidelink control channel (PSCCH). 1 may control the transceiver 106 to receive sidelink control information (SCI). And, for example, the processor 102 of the first device 100 is a transceiver ( 106) can be controlled.
- PSSCH physical sidelink shared channel
- PSCCH first physical sidelink control channel
- SCI sidelink control information
- the processor 102 of the first device 100 is a transceiver ( 106) can be controlled.
- the processor 102 of the first device 100 may determine a first physical sidelink feedback channel (PSFCH) resource based on the index of the slot and the index of the subchannel related to the first PSSCH. . For example, based on the omission of the first PSFCH transmission related to the first PSSCH on the first PSFCH resource, a first timer included in the SL DRX configuration may be started.
- PSFCH physical sidelink feedback channel
- a first device for performing wireless communication may include one or more memories storing instructions; one or more transceivers; and one or more processors connecting the one or more memories and the one or more transceivers.
- the one or more processors execute the instructions to obtain a sidelink discontinuous reception (SL DRX) configuration, and a first physical sidelink shared channel (PSSCH) through a first physical sidelink control channel (PSCCH) from a second device ), receive first sidelink control information (SCI) for scheduling, receive second SCI and first data from the second device through the first physical sidelink shared channel (PSSCH), and receive the first PSSCH and Based on the index of the related slot and the index of the subchannel, the first physical sidelink feedback channel (PSFCH) resource may be determined. For example, based on the omission of the first PSFCH transmission related to the first PSSCH on the first PSFCH resource, a first timer included in the SL DRX configuration may be started.
- an apparatus configured to control the first terminal may be provided.
- one or more processors and one or more memories operably coupled by the one or more processors and storing instructions.
- the one or more processors execute the instructions to obtain a sidelink discontinuous reception (SL DRX) configuration, and a first physical sidelink shared channel (PSSCH) through a first physical sidelink control channel (PSCCH) from a second terminal ) receives first SCI (sidelink control information) for scheduling, receives second SCI and first data from the second terminal through the first physical sidelink shared channel (PSSCH), and receives the first PSSCH and Based on the index of the related slot and the index of the subchannel, the first physical sidelink feedback channel (PSFCH) resource may be determined. For example, based on the omission of the first PSFCH transmission related to the first PSSCH on the first PSFCH resource, a first timer included in the SL DRX configuration may be started.
- a non-transitory computer-readable storage medium recording instructions may be provided.
- the instructions when executed, cause the first apparatus to: obtain an SL sidelink discontinuous reception (DRX) setup, and from a second apparatus to a first physical sidelink control channel (PSCCH) via a first physical sidelink control channel (PSSCH).
- PSSCH physical sidelink control channel
- SCI sidelink control information
- PSSCH physical sidelink shared channel
- SCI sidelink control information
- PSSCH physical sidelink shared channel
- the first physical sidelink feedback channel (PSFCH) resource may be determined. For example, based on the omission of the first PSFCH transmission related to the first PSSCH on the first PSFCH resource, a first timer included in the SL DRX configuration may be started.
- FIG. 15 illustrates a method for starting an SL DRX timer according to an embodiment of the present disclosure.
- the embodiment of FIG. 15 may be combined with various embodiments of the present disclosure.
- the second device 200 sends the first device 100 a first for scheduling a first physical sidelink shared channel (PSSCH) through a first physical sidelink control channel (PSCCH).
- Sidelink control information SCI may be transmitted.
- the second device 200 may transmit the second SCI and first data to the first device 100 through the first physical sidelink shared channel (PSSCH).
- PSSCH physical sidelink shared channel
- an SL sidelink discontinuous reception (DRX) configuration may be obtained.
- DRX SL sidelink discontinuous reception
- a first physical sidelink feedback channel (PSFCH) resource may be determined based on an index of a slot and a subchannel index related to the first PSSCH.
- PSFCH physical sidelink feedback channel
- a first timer included in the SL DRX configuration may be started.
- the first PSFCH may include either an acknowledgment (ACK) or a negative acknowledgment (NACK).
- ACK acknowledgment
- NACK negative acknowledgment
- the first timer may include at least one of an SL DRX hybrid automatic repeat request (HARQ) round trip time (RTT) timer or an SL DRX retransmission timer.
- HARQ hybrid automatic repeat request
- RTT round trip time
- the ACK may be transmitted based on a reserved resource located after the first timer expires.
- decoding for the first PSSCH may be additionally performed on a reserved resource located after the first timer expires.
- an ACK may be transmitted based on the successful decoding.
- the number of reserved resources located after the first timer expires may be set differently based on at least one of a service type, a priority, or a degree of congestion in the resource pool.
- the processor 202 of the second device 200 provides the first device 100 with a first for scheduling a first physical sidelink shared channel (PSSCH) through a first physical sidelink control channel (PSCCH). 1 may control the transceiver 206 to transmit sidelink control information (SCI). And, for example, the processor 202 of the second device 200 transmits the second SCI and the first data to the first device 100 through the first physical sidelink shared channel (PSSCH). 206) can be controlled.
- PSSCH physical sidelink shared channel
- PSCCH physical sidelink control channel
- a second device for performing wireless communication may include one or more memories storing instructions; one or more transceivers; and one or more processors connecting the one or more memories and the one or more transceivers.
- the one or more processors execute the instructions to provide the first device with first sidelink control information (SCI) for scheduling a first physical sidelink shared channel (PSSCH) through a first physical sidelink control channel (PSCCH). ), and transmit the second SCI and the first data to the first device through the first physical sidelink shared channel (PSSCH).
- SCI sidelink control information
- PSSCH physical sidelink shared channel
- PSCCH first physical sidelink control channel
- DRX SL sidelink discontinuous reception
- a first physical sidelink feedback channel (PSFCH) resource may be determined based on an index of a slot and a subchannel index related to the first PSSCH. For example, based on the omission of the first PSFCH transmission related to the first PSSCH on the first PSFCH resource, a first timer included in the SL DRX configuration may be started.
- PSFCH physical sidelink feedback channel
- Various embodiments of the present disclosure may be implemented independently. Alternatively, various embodiments of the present disclosure may be implemented in combination with or merged with each other. For example, various embodiments of the present disclosure have been described based on a 3GPP system for convenience of description, but various embodiments of the present disclosure may be extendable to systems other than the 3GPP system. For example, various embodiments of the present disclosure are not limited only to direct communication between terminals, and may be used in uplink or downlink, and in this case, a base station or a relay node may use the method proposed according to various embodiments of the present disclosure.
- information on whether the method according to various embodiments of the present disclosure is applied may be provided by the base station to the terminal or the second device 200 to the receiving terminal using a predefined signal (eg, a physical layer). signal or higher layer signal).
- a predefined signal eg, a physical layer. signal or higher layer signal
- information on rules according to various embodiments of the present disclosure may include a pre-defined signal (eg, a physical layer signal or a higher layer signal) from the base station to the terminal or the second device 200 to the receiving terminal. Signal) can be defined to notify.
- FIG. 16 shows a communication system 1 according to an embodiment of the present disclosure.
- the embodiment of FIG. 16 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 wireless access technology (eg, 5G NR (New RAT), LTE (Long Term Evolution)), and may be referred to as a communication/wireless/5G device.
- a wireless access technology eg, 5G NR (New RAT), LTE (Long Term Evolution)
- the wireless device includes a robot 100a, a vehicle 100b-1, 100b-2, an eXtended Reality (XR) device 100c, a hand-held device 100d, and a home appliance 100e. ), an Internet of Thing (IoT) device 100f, and an AI device/server 400 .
- the vehicle may include a vehicle equipped with a wireless communication function, an autonomous driving 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 AR (Augmented Reality)/VR (Virtual Reality)/MR (Mixed Reality) devices, and include a Head-Mounted Device (HMD), a Head-Up Display (HUD) provided in a vehicle, a television, a smartphone, It may be implemented in the form of a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like.
- the mobile device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, smart glasses), a computer (eg, a laptop computer), and the like.
- Home appliances may include a TV, a refrigerator, a washing machine, and the like.
- the IoT device may include a sensor, a smart meter, and the like.
- the base station and the network may 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 specification may include a narrowband Internet of Things for low-power communication as well as LTE, NR, and 6G.
- NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology, may be implemented in standards such as LTE Cat NB1 and/or LTE Cat NB2, and is limited to the above-mentioned names not.
- the wireless communication technology implemented in the wireless devices 100a to 100f of the present specification may perform communication based on the LTE-M technology.
- the LTE-M technology may be an example of an LPWAN technology, and may be called by various names such as enhanced machine type communication (eMTC).
- eMTC enhanced machine type communication
- LTE-M technology is 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 It may be implemented in at least one of various standards such as Type Communication, and/or 7) LTE M, and is not limited to the above-described name.
- the wireless communication technology implemented in the wireless devices 100a to 100f of the present specification is at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) in consideration of low power communication.
- LPWAN Low Power Wide Area Network
- the ZigBee technology can create PAN (personal area networks) related to small/low-power digital communication based on various standards such as IEEE 802.15.4, and can be called by various names.
- the wireless devices 100a to 100f may be connected to the network 300 through the base station 200 .
- Artificial intelligence (AI) technology may be applied to the wireless devices 100a to 100f , and the wireless devices 100a to 100f may be connected to the AI server 400 through the network 300 .
- 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 (e.g. sidelink communication) without passing 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).
- the IoT device eg, sensor
- the IoT device may directly communicate with other IoT devices (eg, sensor) 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 .
- the wireless communication/connection includes uplink/downlink communication 150a and sidelink communication 150b (or D2D communication), communication between base stations 150c (e.g. relay, IAB (Integrated Access Backhaul), etc.)
- This can be done through technology (eg 5G NR)
- Wireless communication/connection 150a, 150b, 150c allows the wireless device and the base station/radio device, and the base station and the base station to transmit/receive wireless signals to 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 etc.
- FIG. 17 illustrates a wireless device according to an embodiment of the present disclosure.
- the embodiment of FIG. 17 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 wireless signals through various wireless access technologies (eg, LTE, NR).
- ⁇ first wireless device 100, second wireless device 200 ⁇ is ⁇ wireless device 100x, base station 200 ⁇ of FIG. 16 and/or ⁇ wireless device 100x, wireless device 100x) ⁇ can be matched.
- the first wireless device 100 includes one or more processors 102 and one or more memories 104 , and may further 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 operational flowcharts disclosed herein.
- the processor 102 may process the information in the memory 104 to generate the first information/signal, and then transmit a wireless signal including the first information/signal through the transceiver 106 .
- the processor 102 may receive the radio signal including the second information/signal through the transceiver 106 , and then store the information obtained from the 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 .
- the memory 104 may provide instructions for performing some or all of the processes controlled by the processor 102 , or for performing the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein. may store software code including
- the processor 102 and the memory 104 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
- a wireless communication technology eg, LTE, NR
- the transceiver 106 may be coupled with 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.
- RF radio frequency
- a wireless device may refer to 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 .
- the processor 202 controls the memory 204 and/or the transceiver 206 and may be configured to implement the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed herein.
- the processor 202 may process the information in the memory 204 to generate third information/signal, and then transmit a wireless signal including the third information/signal through the transceiver 206 .
- the processor 202 may receive the radio signal including the fourth information/signal through the transceiver 206 , and then 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 .
- the memory 204 may provide instructions for performing some or all of the processes controlled by the processor 202 , or for performing the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein. may store software code including
- the processor 202 and the memory 204 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
- 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 refer to 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).
- the one or more processors 102, 202 may be configured to process one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the description, function, procedure, proposal, method, and/or operational flowcharts disclosed herein.
- PDUs Protocol Data Units
- SDUs Service Data Units
- One or more processors 102 , 202 may generate messages, control information, data, or information according to the description, function, procedure, proposal, method, and/or flow charts disclosed herein.
- the one or more processors 102 and 202 generate a signal (eg, a baseband signal) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and/or methods disclosed herein. , to one or more transceivers 106 and 206 .
- the one or more processors 102 , 202 may receive signals (eg, baseband signals) from one or more transceivers 106 , 206 , and may be described, functions, procedures, proposals, methods, and/or flowcharts of operation disclosed herein.
- PDUs, SDUs, messages, control information, data, or information may be acquired according to the fields.
- 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.
- the descriptions, functions, procedures, suggestions, methods, and/or flow charts disclosed in this document provide that firmware or software configured to perform is included in one or more processors 102 , 202 , or stored in one or more memories 104 , 204 . It may be driven by the above processors 102 and 202 .
- the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed herein may be implemented using firmware or software in the form of code, instructions, and/or sets of instructions.
- One or more memories 104 , 204 may be coupled to one or more processors 102 , 202 and may store various forms of data, signals, messages, information, programs, code, instructions, and/or instructions.
- the one or more memories 104 and 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 inside and/or external to one or more processors 102 , 202 .
- 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. referred to in the methods and/or operational flowcharts of this document 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 the descriptions, functions, procedures, suggestions, methods and/or flow charts, etc. disclosed herein, from one or more other devices. have.
- one or more transceivers 106 , 206 may be coupled to one or more processors 102 , 202 and may 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 wireless signals to one or more other devices.
- one or more processors 102 , 202 may control one or more transceivers 106 , 206 to receive user data, control information, or wireless signals from one or more other devices.
- one or more transceivers 106, 206 may be coupled with one or more antennas 108, 208, and the one or more transceivers 106, 206 may be coupled via one or more antennas 108, 208 to the descriptions, functions, and functions disclosed herein. , procedures, proposals, methods and/or operation flowcharts, etc.
- one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports).
- the one or more transceivers 106, 206 convert the received radio signal/channel, etc. from the RF band signal to process the received user data, control information, radio signal/channel, etc. using the 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, radio signals/channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals.
- one or more transceivers 106 , 206 may include (analog) oscillators and/or filters.
- 18 illustrates a signal processing circuit for a transmission signal according to an embodiment of the present disclosure. 18 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. 18 may be performed by the processors 102 , 202 and/or transceivers 106 , 206 of FIG. 17 .
- the hardware elements of FIG. 18 may be implemented in the processors 102 , 202 and/or transceivers 106 , 206 of FIG. 17 .
- blocks 1010 to 1060 may be implemented in the processors 102 and 202 of FIG. 17 .
- blocks 1010 to 1050 may be implemented in the processors 102 and 202 of FIG. 17
- block 1060 may be implemented in the transceivers 106 and 206 of FIG. 17 .
- the codeword may be converted into a wireless signal through the signal processing circuit 1000 of FIG. 18 .
- the codeword is a coded bit sequence of an information block.
- the information block may include a transport block (eg, a UL-SCH transport block, a DL-SCH transport block).
- the radio signal 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, and the like.
- the scrambled bit sequence may be modulated by a modulator 1020 into a modulation symbol sequence.
- the modulation method 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 may be obtained by multiplying the output y of the layer mapper 1030 by the precoding matrix W of N*M.
- N is the number of antenna ports
- M is the number of transport layers.
- the precoder 1040 may perform precoding after performing transform precoding (eg, DFT transform) on the 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 a time-frequency resource.
- the time-frequency resource may include a plurality of symbols (eg, a CP-OFDMA symbol, a DFT-s-OFDMA symbol) in the time domain and a plurality of subcarriers in the frequency domain.
- 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 of the signal processing process 1010 to 1060 of FIG. 18 .
- the wireless device eg, 100 and 200 in FIG. 17
- 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 descrambling process.
- the codeword may be restored to the original information block through decoding.
- the signal processing circuit (not shown) for the received signal may include a signal reconstructor, a resource de-mapper, a post coder, a demodulator, a de-scrambler, and a decoder.
- FIG. 19 illustrates a wireless device according to an embodiment of the present disclosure.
- the wireless device may be implemented in various forms according to use-examples/services (see FIG. 16 ).
- the embodiment of FIG. 19 may be combined with various embodiments of the present disclosure.
- wireless devices 100 and 200 correspond to wireless devices 100 and 200 of FIG. 17 , and include various elements, components, units/units, and/or modules. ) can be composed of
- 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 and/or one or more memories 104 , 204 of FIG. 17 .
- transceiver(s) 114 may include one or more transceivers 106 , 206 and/or one or more antennas 108 , 208 of FIG. 17 .
- the control unit 120 is electrically connected to the communication unit 110 , the memory unit 130 , and the additional element 140 , and controls general operations of the wireless device.
- the controller 120 may control the electrical/mechanical operation of the wireless device based on the program/code/command/information stored in the memory unit 130 .
- 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 through the communication unit 110 to the outside (eg, Information received through a wireless/wired interface from another communication device) may be stored in the memory unit 130 .
- the additional element 140 may be configured in various ways according to the type of the wireless device.
- the additional element 140 may include at least one of a power unit/battery, an input/output unit (I/O unit), a driving unit, and a computing unit.
- the wireless device may include a robot ( FIGS. 16 and 100a ), a vehicle ( FIGS. 16 , 100b-1 , 100b-2 ), an XR device ( FIGS. 16 and 100c ), a mobile device ( FIGS. 16 and 100d ), and a home appliance. (FIG. 16, 100e), IoT device (FIG.
- the wireless device may be mobile or used in a fixed location depending on the use-example/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 some of them may be wirelessly connected 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 unit (eg, 130 and 140 ) are connected to the communication unit 110 through the communication unit 110 . It can be connected wirelessly.
- each element, component, unit/unit, and/or module within the wireless device 100 , 200 may further include one or more elements.
- the controller 120 may be configured with one or more processor sets.
- control unit 120 may be configured as 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.
- 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.
- FIG. 19 will be described in more detail with reference to the drawings.
- the portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, smart glasses), 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 .
- the antenna unit 108 may be configured as a part of the communication unit 110 .
- Blocks 110 to 130/140a to 140c respectively correspond to blocks 110 to 130/140 of FIG. 19 .
- the communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with other wireless devices and base stations.
- the controller 120 may control components of the portable device 100 to perform various operations.
- the controller 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 . Also, 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 the connection between the portable device 100 and other external devices.
- the interface unit 140b may include various ports (eg, an audio input/output port and a video input/output port) for connection with an external device.
- 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 obtained information/signals are stored in the memory unit 130 . can be saved.
- the communication unit 110 may convert the information/signal stored in the memory into a wireless signal, and transmit the converted wireless signal directly to another wireless device or to a base station. Also, after receiving a radio signal from another radio device or base station, the communication unit 110 may restore the received radio signal to original information/signal.
- the restored information/signal may be stored in the memory unit 130 and output in various forms (eg, text, voice, image, video, haptic) through the input/output unit 140c.
- the vehicle or autonomous driving vehicle may be implemented as a mobile robot, vehicle, train, manned/unmanned aerial vehicle (AV), ship, or the like.
- the embodiment of FIG. 21 may be combined with various embodiments of the present disclosure.
- the vehicle or autonomous driving 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 autonomous driving. It may include a part 140d.
- the antenna unit 108 may be configured as a part of the communication unit 110 .
- Blocks 110/130/140a-140d correspond to blocks 110/130/140 of FIG. 19, respectively.
- the communication unit 110 may transmit/receive signals (eg, data, control signals, etc.) to and from external devices such as other vehicles, base stations (eg, base stations, roadside units, etc.), servers, and the like.
- the controller 120 may control elements of the vehicle or the autonomous driving vehicle 100 to perform various operations.
- the controller 120 may include an Electronic Control Unit (ECU).
- the driving unit 140a may make the vehicle or the autonomous driving vehicle 100 run 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 the autonomous driving vehicle 100 , and may include a wired/wireless charging circuit, a battery, and the like.
- the sensor unit 140c may obtain vehicle status, surrounding environment information, user information, and the like.
- 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 sensor, a heading sensor, a position module, and a vehicle forward movement.
- IMU inertial measurement unit
- a collision sensor a wheel sensor
- a speed sensor a speed sensor
- an inclination sensor a weight sensor
- a heading sensor a position module
- a vehicle forward movement / may include a reverse sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a 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. 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 to move the vehicle or the autonomous driving vehicle 100 along the autonomous driving path (eg, speed/direction adjustment) according to the driving plan.
- the communication unit 110 may non/periodically acquire the latest traffic information data from an external server, and may acquire 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 the autonomous driving route and the driving plan based on the 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 or the like based on information collected from the vehicle or autonomous vehicles, and may provide the predicted traffic information data to the vehicle or autonomous vehicles.
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- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
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Abstract
Description
SCS (15*2u) | Nslot symb | Nframe,u slot | Nsubframe,u slot |
15KHz (u=0) | 14 | 10 | 1 |
30KHz (u=1) | 14 | 20 | 2 |
60KHz (u=2) | 14 | 40 | 4 |
120KHz (u=3) | 14 | 80 | 8 |
240KHz (u=4) | 14 | 160 | 16 |
SCS (15*2u) | Nslot symb | Nframe,u slot | Nsubframe,u slot |
60KHz (u=2) | 12 | 40 | 4 |
Frequency Range designation | Corresponding frequency range | Subcarrier Spacing (SCS) |
FR1 | 450MHz - 6000MHz | 15, 30, 60kHz |
FR2 | 24250MHz - 52600MHz | 60, 120, 240kHz |
Frequency Range designation | Corresponding frequency range | Subcarrier Spacing (SCS) |
FR1 | 410MHz - 7125MHz | 15, 30, 60kHz |
FR2 | 24250MHz - 52600MHz | 60, 120, 240kHz |
Claims (20)
- 제 1 장치가 무선 통신을 수행하는 방법에 있어서,SL DRX(sidelink discontinuous reception) 설정을 획득하는 단계;제 2 장치로부터 제 1 PSCCH(physical sidelink control channel)를 통해 제 1 PSSCH(physical sidelink shared channel)를 스케줄링하기 위한 제 1 SCI(sidelink control information)를 수신하는 단계; 및상기 제 2 장치로부터 상기 제 1 PSSCH(physical sidelink shared channel)를 통해 제 2 SCI 및 제 1 데이터를 수신하는 단계; 및상기 제 1 PSSCH와 관련된 슬롯의 인덱스 및 서브채널의 인덱스를 기반으로, 제 1 PSFCH(physical sidelink feedback channel) 자원을 결정하는 단계;를 포함하되,상기 제 1 PSFCH 자원 상에서 상기 제 1 PSSCH와 관련된 제 1 PSFCH 전송이 생략되는 것에 기반하여, 상기 SL DRX 설정에 포함된 제 1 타이머가 개시되는, 방법.
- 제 1 항에 있어서,상기 제 1 PSFCH는 ACK(acknowledgement) 또는 NACK(negative acknowledgement) 중에서 어느 하나를 포함하는, 방법.
- 제 1 항에 있어서,제 1 타이머는 SL DRX HARQ(hybrid automatic repeat request) RTT(round trip time) 타이머 또는 SL DRX 재전송 타이머 중 적어도 하나를 포함하는, 방법.
- 제 1 항에 있어서,제 2 PSCCH를 통해 제 2 PSSCH를 스케줄링하기 위한 제 3 SCI를 수신하는 단계; 및상기 제 2 PSSCH를 통해 제 4 SCI 및 제 2 데이터를 수신하는 단계; 및상기 제 2 PSSCH와 관련된 슬롯의 인덱스 및 서브채널의 인덱스를 기반으로, 제 2 PSFCH 자원을 결정하는 단계; 및상기 제 2 PSFCH 자원 상에서 상기 제 2 PSSCH와 관련된 제 2 PSFCH 전송이 생략되는 것에 기반하여, 상기 SL DRX 설정에 포함된 제 2 타이머가 개시되지 않는, 방법.
- 제 4 항에 있어서,상기 제 2 PSFCH는 NACK만을 포함하는, 방법.
- 제 4 항에 있어서,상기 제 2 타이머는 SL DRX HARQ RTT 타이머 또는 SL DRX 재전송 타이머 중 적어도 하나를 포함하는, 방법.
- 제 4 항에 있어서,제 3 장치에 의해 상기 제 2 데이터와 관련된 제 3 PSFCH가 전송된 것에 기반하여, 상기 제 2 타이머가 개시되고, 및상기 제 3 장치는 상기 제 1 장치와 동일한 그룹 캐스트 통신을 수행하는 장치인, 방법.
- 제 1 항에 있어서,상기 제 1 타이머가 만료된 이후에 위치하는 예약 자원에 기반하여 ACK이 전송되는, 방법.
- 제 1 항에 있어서,상기 제 1 타이머가 만료된 이후에 위치하는 예약 자원 상에서 상기 제 1 PSSCH에 대한 디코딩이 추가적으로 수행되는, 방법.
- 제 9 항에 있어서,상기 디코딩이 성공한 것에 기반하여 ACK이 전송되는, 방법.
- 제 1 항에 있어서,상기 제 1 타이머가 만료된 이후에 위치하는 예약 자원의 개수는 서비스 타입, 우선 순위 또는 자원 풀 내 혼잡도 중 적어도 하나에 기반하여 상이하게 설정되는, 방법.
- 제 4 항에 있어서,상기 제 2 PSFCH 전송과 오버랩되는 제 3 PSFCH 전송의 우선 순위가 상기 제 2 PSFCH 전송의 우선 순위보다 높은 것에 기반하여, 상기 제 2 PSFCH 전송이 생략되는, 방법.
- 제 12 항에 있어서,상기 제 2 PSFCH 전송과 상기 제 3 PSFCH 전송은 그룹캐스트 통신과 관련되고, 및상기 제 3 PSFCH 전송과 관련된 그룹캐스트 멤버의 수가 상기 제 2 PSFCH 전송과 관련된 그룹캐스트 멤버의 수보다 많은, 방법.
- 무선 통신을 수행하는 제 1 장치에 있어서,명령어들을 저장하는 하나 이상의 메모리;하나 이상의 송수신기; 및상기 하나 이상의 메모리와 상기 하나 이상의 송수신기를 연결하는 하나 이상의 프로세서를 포함하되, 상기 하나 이상의 프로세서는 상기 명령어들을 실행하여,SL DRX(sidelink discontinuous reception) 설정을 획득하고,제 2 장치로부터 제 1 PSCCH(physical sidelink control channel)를 통해 제 1 PSSCH(physical sidelink shared channel)를 스케줄링하기 위한 제 1 SCI(sidelink control information)를 수신하고,상기 제 2 장치로부터 상기 제 1 PSSCH(physical sidelink shared channel)를 통해 제 2 SCI 및 제 1 데이터를 수신하고,상기 제 1 PSSCH와 관련된 슬롯의 인덱스 및 서브채널의 인덱스를 기반으로, 제 1 PSFCH(physical sidelink feedback channel) 자원을 결정하되,상기 제 1 PSFCH 자원 상에서 상기 제 1 PSSCH와 관련된 제 1 PSFCH 전송이 생략되는 것에 기반하여, 상기 SL DRX 설정에 포함된 제 1 타이머가 개시되는, 제 1 장치.
- 제 1 단말을 제어하도록 설정된 장치(apparatus)에 있어서, 상기 장치는,하나 이상의 프로세서; 및상기 하나 이상의 프로세서에 의해 실행 가능하게 연결되고, 및 명령어들을 저장하는 하나 이상의 메모리를 포함하되, 상기 하나 이상의 프로세서는 상기 명령어들을 실행하여,SL DRX(sidelink discontinuous reception) 설정을 획득하고,제 2 단말로부터 제 1 PSCCH(physical sidelink control channel)를 통해 제 1 PSSCH(physical sidelink shared channel)를 스케줄링하기 위한 제 1 SCI(sidelink control information)를 수신하고,상기 제 2 단말로부터 상기 제 1 PSSCH(physical sidelink shared channel)를 통해 제 2 SCI 및 제 1 데이터를 수신하고,상기 제 1 PSSCH와 관련된 슬롯의 인덱스 및 서브채널의 인덱스를 기반으로, 제 1 PSFCH(physical sidelink feedback channel) 자원을 결정하되,상기 제 1 PSFCH 자원 상에서 상기 제 1 PSSCH와 관련된 제 1 PSFCH 전송이 생략되는 것에 기반하여, 상기 SL DRX 설정에 포함된 제 1 타이머가 개시되는, 장치.
- 명령들을 기록하고 있는 비-일시적 컴퓨터 판독가능 저장 매체로서,상기 명령들은, 실행될 때, 제 1 장치로 하여금:SL DRX(sidelink discontinuous reception) 설정을 획득하게 하고,제 2 장치로부터 제 1 PSCCH(physical sidelink control channel)를 통해 제 1 PSSCH(physical sidelink shared channel)를 스케줄링하기 위한 제 1 SCI(sidelink control information)를 수신하게 하고,상기 제 2 장치로부터 상기 제 1 PSSCH(physical sidelink shared channel)를 통해 제 2 SCI 및 제 1 데이터를 수신하게 하고,상기 제 1 PSSCH와 관련된 슬롯의 인덱스 및 서브채널의 인덱스를 기반으로, 제 1 PSFCH(physical sidelink feedback channel) 자원을 결정하게 하되,상기 제 1 PSFCH 자원 상에서 상기 제 1 PSSCH와 관련된 제 1 PSFCH 전송이 생략되는 것에 기반하여, 상기 SL DRX 설정에 포함된 제 1 타이머가 개시되는, 비-일시적 컴퓨터 판독가능 저장 매체.
- 제 2 장치가 무선 통신을 수행하는 방법에 있어서,제 1 장치에게 제 1 PSCCH(physical sidelink control channel)를 통해 제 1 PSSCH(physical sidelink shared channel)를 스케줄링하기 위한 제 1 SCI(sidelink control information)를 전송하는 단계; 및상기 제 1 장치에게 상기 제 1 PSSCH(physical sidelink shared channel)를 통해 제 2 SCI 및 제 1 데이터를 전송하는 단계;를 포함하되,SL DRX(sidelink discontinuous reception) 설정이 획득되고,상기 제 1 PSSCH와 관련된 슬롯의 인덱스 및 서브채널의 인덱스를 기반으로, 제 1 PSFCH(physical sidelink feedback channel) 자원이 결정되고,상기 제 1 PSFCH 자원 상에서 상기 제 1 PSSCH와 관련된 제 1 PSFCH 전송이 생략되는 것에 기반하여, 상기 SL DRX 설정에 포함된 제 1 타이머가 개시되는, 방법.
- 제 17 항에 있어서,상기 제 1 PSFCH는 ACK(acknowledgement) 또는 NACK(negative acknowledgement) 중에서 어느 하나를 포함하는, 방법.
- 무선 통신을 수행하는 제 2 장치에 있어서,명령어들을 저장하는 하나 이상의 메모리;하나 이상의 송수신기; 및상기 하나 이상의 메모리와 상기 하나 이상의 송수신기를 연결하는 하나 이상의 프로세서를 포함하되, 상기 하나 이상의 프로세서는 상기 명령어들을 실행하여,제 1 장치에게 제 1 PSCCH(physical sidelink control channel)를 통해 제 1 PSSCH(physical sidelink shared channel)를 스케줄링하기 위한 제 1 SCI(sidelink control information)를 전송하는 단계; 및상기 제 1 장치에게 상기 제 1 PSSCH(physical sidelink shared channel)를 통해 제 2 SCI 및 제 1 데이터를 전송하는 단계;를 포함하되,SL DRX(sidelink discontinuous reception) 설정이 획득되고,상기 제 1 PSSCH와 관련된 슬롯의 인덱스 및 서브채널의 인덱스를 기반으로, 제 1 PSFCH(physical sidelink feedback channel) 자원이 결정되고,상기 제 1 PSFCH 자원 상에서 상기 제 1 PSSCH와 관련된 제 1 PSFCH 전송이 생략되는 것에 기반하여, 상기 SL DRX 설정에 포함된 제 1 타이머가 개시되는, 제 2 장치.
- 제 19 항에 있어서,상기 제 1 PSFCH는 ACK(acknowledgement) 또는 NACK(negative acknowledgement) 중에서 어느 하나를 포함하는, 제 2 장치.
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EP22739645.4A EP4280500A1 (en) | 2021-01-12 | 2022-01-12 | Method and device for performing sl drx operation on basis of harq feedback in nr v2x |
KR1020237019540A KR20230097196A (ko) | 2021-01-12 | 2022-01-12 | Nr v2x에서 harq 피드백에 기반하여 sl drx 동작을 수행하는 방법 및 장치 |
CN202280009058.5A CN116686242A (zh) | 2021-01-12 | 2022-01-12 | 在nr v2x中基于harq反馈执行sl drx操作的方法和设备 |
US18/337,649 US11902962B2 (en) | 2021-01-12 | 2023-06-20 | Method and device for performing SL DRX operation on basis of HARQ feedback in NR V2X |
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WO2024071974A1 (ko) * | 2022-09-26 | 2024-04-04 | 엘지전자 주식회사 | 비면허 대역에서 사이드링크 통신을 수행하는 방법 및 장치 |
WO2024071975A1 (ko) * | 2022-09-28 | 2024-04-04 | 엘지전자 주식회사 | 비면허 대역에서 사이드링크 통신을 수행하는 방법 및 장치 |
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CN116686242A (zh) | 2023-09-01 |
KR20230097196A (ko) | 2023-06-30 |
US20230345463A1 (en) | 2023-10-26 |
KR20230151555A (ko) | 2023-11-01 |
US11902962B2 (en) | 2024-02-13 |
US20220225469A1 (en) | 2022-07-14 |
EP4280500A1 (en) | 2023-11-22 |
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