WO2022154640A1 - Nr v2x에서 자원 할당을 향상시키는 방법 및 장치 - Google Patents
Nr v2x에서 자원 할당을 향상시키는 방법 및 장치 Download PDFInfo
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- WO2022154640A1 WO2022154640A1 PCT/KR2022/000914 KR2022000914W WO2022154640A1 WO 2022154640 A1 WO2022154640 A1 WO 2022154640A1 KR 2022000914 W KR2022000914 W KR 2022000914W WO 2022154640 A1 WO2022154640 A1 WO 2022154640A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/25—Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1825—Adaptation of specific ARQ protocol parameters according to transmission conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1858—Transmission or retransmission of more than one copy of acknowledgement message
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0289—Congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/18—Interfaces between hierarchically similar devices between terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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.
- a method of operating the first device 100 in a wireless communication system includes: obtaining a threshold associated with a successive unused transmission opportunity; determining a sensing window; performing resource selection for at least one period based on the sensing performed in the sensing window; increasing a value related to consecutive unused transmission opportunities by 1 based on the fact that transmission is not performed on all transmission resources within a first period included in the at least one period; and triggering resource reselection based on the value related to the consecutive unused transmission opportunities reaching a threshold value related to the unused transmission opportunities.
- the terminal can efficiently perform sidelink communication.
- 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 an example of triggering resource reselection based on consecutive unused transmission opportunities, according to an embodiment of the present disclosure.
- FIG. 12 illustrates a procedure in which a first device performs wireless communication, according to an embodiment of the present disclosure.
- FIG. 13 illustrates a procedure in which a second device performs wireless communication, according to an embodiment of the present disclosure.
- FIG. 14 shows a communication system 1 according to an embodiment of the present disclosure.
- FIG. 15 illustrates a wireless device according to an embodiment of the present disclosure.
- FIG. 16 illustrates a signal processing circuit for a transmission signal 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 portable device according to an embodiment of the present disclosure.
- FIG 19 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
- 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 gNBs.
- 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 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.
- the (absolute time) interval of a time resource eg, subframe, slot, or TTI
- 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.) 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 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
- N e.g, 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 terminal 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), UE 1 may perform V2X or SL communication with UE 2 according to the resource scheduling.
- PDCCH Downlink Control Information
- RRC signaling eg, Configured Grant Type 1 or Configured Grant Type 2
- UE 1 may perform V2X or SL communication with UE 2 according to the 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).
- 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.
- the terminal may help select an SL resource for another terminal.
- the UE may receive a configured grant for SL transmission.
- the terminal may schedule SL transmission of another terminal.
- the UE may reserve an SL resource for blind retransmission.
- the first terminal may indicate to the second terminal the priority of SL transmission using SCI.
- the second terminal may decode the SCI, and the second terminal may perform sensing and/or resource (re)selection based on the priority.
- the resource (re)selection procedure includes the step of the second terminal identifying a candidate resource in a resource selection window, and the second terminal selecting a resource for (re)transmission from among the identified candidate resources can do.
- the resource selection window may be a time interval during which the terminal selects a resource for SL transmission.
- the resource selection window is T1 0, and the resource selection window may be limited by the remaining packet delay budget of the second terminal.
- a specific resource is indicated by the SCI received by the second terminal from the first terminal, and the L1 SL RSRP measurement value for the specific resource is If the SL RSRP threshold is exceeded, the second terminal may not determine the specific resource as a candidate resource.
- the SL RSRP threshold value may be determined based on the priority of the SL transmission indicated by the SCI received by the second terminal from the first terminal and the priority of the SL transmission on the resource selected by the second terminal.
- the L1 SL RSRP may be measured based on an SL DMRS (Demodulation Reference Signal).
- SL DMRS Demodulation Reference Signal
- one or more PSSCH DMRS patterns may be set or preset for each resource pool in the time domain.
- the PDSCH DMRS configuration type 1 and/or type 2 may be the same as or similar to the frequency domain pattern of the PSSCH DMRS.
- the exact DMRS pattern may be indicated by the SCI.
- the transmitting terminal may select a specific DMRS pattern from among DMRS patterns configured or preset for the resource pool.
- the transmitting terminal may perform initial transmission of a TB (Transport Block) without reservation. For example, based on the sensing and resource (re)selection procedure, the transmitting terminal may reserve the SL resource for the initial transmission of the second TB by using the SCI associated with the first TB.
- a TB Transport Block
- the UE may reserve a resource for feedback-based PSSCH retransmission through signaling related to previous transmission of the same transport block (TB).
- the maximum number of SL resources reserved by one transmission including the current transmission may be 2, 3, or 4.
- the maximum number of SL resources may be the same regardless of whether HARQ feedback is allowed.
- the maximum number of HARQ (re)transmissions for one TB may be limited by configuration or preset.
- the maximum number of HARQ (re)transmissions may be up to 32.
- the maximum number of HARQ (re)transmissions may be unspecified.
- the setting or preset may be for a transmitting terminal.
- HARQ feedback for releasing resources not used by the UE may be supported.
- the UE may indicate to another UE one or more subchannels and/or slots used by the UE using SCI.
- the UE may indicate to another UE one or more subchannels and/or slots reserved by the UE for PSSCH (re)transmission by using SCI.
- the minimum allocation unit of the SL resource may be a slot.
- the size of the subchannel may be set for the terminal or may be preset.
- SCI Servicelink Control Information
- Control information transmitted by the base station to the terminal through the PDCCH may be referred to as downlink control information (DCI), whereas control information transmitted by the terminal to another terminal through the PSCCH may be referred to as SCI.
- DCI downlink control information
- SCI control information transmitted by the terminal to another terminal through the PSCCH
- the UE may know the number of start symbols of the PSCCH and/or the number of symbols of the PSCCH.
- the SCI may include SL scheduling information.
- the UE may transmit at least one SCI to another UE to schedule the PSSCH.
- one or more SCI formats may be defined.
- the transmitting terminal may transmit the SCI to the receiving terminal on the PSCCH.
- the receiving terminal may decode one SCI to receive the PSSCH from the transmitting terminal.
- the transmitting terminal may transmit two consecutive SCIs (eg, 2-stage SCI) to the receiving terminal on the PSCCH and/or the PSSCH.
- the receiving terminal may decode two consecutive SCIs (eg, 2-stage SCI) to receive the PSSCH from the transmitting terminal.
- the SCI configuration fields are divided into two groups in consideration of the (relatively) high SCI payload size
- the SCI including the first SCI configuration field group is called the first SCI or the 1st SCI.
- the SCI including the second SCI configuration field group may be referred to as a second SCI or a 2nd SCI.
- the transmitting terminal may transmit the first SCI to the receiving terminal through the PSCCH.
- the transmitting terminal may transmit the second SCI to the receiving terminal on the PSCCH and/or the PSSCH.
- the second SCI may be transmitted to the receiving terminal through (independent) PSCCH, or may be piggybacked and transmitted together with data through PSSCH.
- two consecutive SCIs may be applied for different transmissions (eg, unicast, broadcast, or groupcast).
- the transmitting terminal may transmit some or all of the following information to the receiving terminal through SCI.
- the transmitting terminal may transmit some or all of the following information to the receiving terminal through the first SCI and/or the second SCI.
- PSSCH and / or PSCCH related resource allocation information for example, time / frequency resource location / number, resource reservation information (eg, period), and / or
- SL CSI transmission indicator (or SL (L1) RSRP (and / or SL (L1) RSRQ and / or SL (L1) RSSI) information transmission indicator), and / or
- NDI New Data Indicator
- RV Redundancy Version
- QoS information eg, priority information, and/or
- - Reference signal eg, DMRS, etc.
- information related to decoding and/or channel estimation of data transmitted through the PSSCH for example, information related to a pattern of a (time-frequency) mapping resource of DMRS, rank (rank) ) information, antenna port index information;
- the first SCI may include information related to channel sensing.
- the receiving terminal may decode the second SCI using the PSSCH DMRS.
- a polar code used for the PDCCH may be applied to the second SCI.
- the payload size of the first SCI may be the same for unicast, groupcast and broadcast.
- the receiving terminal does not need to perform blind decoding of the second SCI.
- the first SCI may include scheduling information of the second SCI.
- the transmitting terminal since the transmitting terminal may transmit at least one of SCI, the first SCI and/or the second SCI to the receiving terminal through the PSCCH, the PSCCH is the SCI, the first SCI and/or the second SCI. 2 may be substituted/substituted with at least one of SCI. And/or, for example, the SCI may be replaced/substituted with at least one of PSCCH, first SCI, and/or second SCI. And/or, for example, since the transmitting terminal may transmit the second SCI to the receiving terminal through the PSSCH, the PSSCH may be replaced/substituted with the second SCI.
- 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.
- HARQ Hybrid Automatic Repeat Request
- An error compensation scheme for securing communication reliability may include a Forward Error Correction (FEC) scheme and an Automatic Repeat Request (ARQ) scheme.
- FEC Forward Error Correction
- ARQ Automatic Repeat Request
- an error at the receiving end can be corrected by adding an extra error correction code to the information bits.
- the FEC method has advantages in that there is little time delay and no separate information exchanged between the transmitting and receiving ends is required, but there is a disadvantage in that the system efficiency is lowered in a good channel environment.
- the ARQ method can increase transmission reliability, but has a disadvantage in that a time delay occurs and system efficiency is lowered in a poor channel environment.
- the Hybrid Automatic Repeat Request (HARQ) method is a combination of FEC and ARQ, and the physical layer checks whether the received data contains an error that cannot be decoded, and when an error occurs, the performance can be improved by requesting retransmission.
- HARQ feedback and HARQ combining in the physical layer may be supported.
- the receiving terminal when the receiving terminal operates in resource allocation mode 1 or 2, the receiving terminal may receive a PSSCH from the transmitting terminal, and the receiving terminal may receive Sidelink Feedback Control Information (SFCI) through a Physical Sidelink Feedback Channel (PSFCH).
- SFCI Sidelink Feedback Control Information
- PSFCH Physical Sidelink Feedback Channel
- HARQ feedback for the PSSCH may be transmitted to the transmitting terminal using the format.
- SL HARQ feedback may be enabled for unicast.
- the receiving terminal in non-CBG (non-Code Block Group) operation, when the receiving terminal decodes the PSCCH targeting the receiving terminal, and the receiving terminal successfully decodes the transport block related to the PSCCH, the receiving terminal HARQ-ACK may be generated. And, the receiving terminal may transmit the HARQ-ACK to the transmitting terminal.
- the receiving terminal after the receiving terminal decodes the PSCCH targeting the receiving terminal, if the receiving terminal does not successfully decode the transport block related to the PSCCH, the receiving terminal may generate a HARQ-NACK. And, the receiving terminal may transmit the HARQ-NACK to the transmitting terminal.
- SL HARQ feedback may be enabled for groupcast.
- two HARQ feedback options may be supported for groupcast.
- Groupcast option 1 After the receiving terminal decodes the PSCCH targeting the receiving terminal, if the receiving terminal fails to decode the transport block related to the PSCCH, the receiving terminal transmits the HARQ-NACK through the PSFCH It can be transmitted to the transmitting terminal. On the other hand, if the receiving terminal decodes the PSCCH targeting the receiving terminal, and the receiving terminal successfully decodes the transport block related to the PSCCH, the receiving terminal may not transmit the HARQ-ACK to the transmitting terminal.
- (2) groupcast option 2 If the receiving terminal fails to decode the transport block related to the PSCCH after the receiving terminal decodes the PSCCH targeting the receiving terminal, the receiving terminal transmits the HARQ-NACK through the PSFCH It can be transmitted to the transmitting terminal. And, when the receiving terminal decodes the PSCCH targeted to the receiving terminal, and the receiving terminal successfully decodes the transport block related to the PSCCH, the receiving terminal may transmit an HARQ-ACK to the transmitting terminal through the PSFCH.
- all terminals performing groupcast communication may share a PSFCH resource.
- terminals belonging to the same group may transmit HARQ feedback using the same PSFCH resource.
- each terminal performing groupcast communication may use different PSFCH resources for HARQ feedback transmission.
- terminals belonging to the same group may transmit HARQ feedback using different PSFCH resources.
- the receiving terminal may determine whether to transmit the HARQ feedback to the transmitting terminal based on a transmission-reception (TX-RX) distance and/or RSRP.
- TX-RX transmission-reception
- the receiving terminal may transmit the HARQ feedback for the PSSCH to the transmitting terminal.
- the receiving terminal may not transmit the HARQ feedback for the PSSCH to the transmitting terminal.
- the transmitting terminal may notify the receiving terminal of the location of the transmitting terminal through the SCI related to the PSSCH.
- the SCI related to the PSSCH may be the second SCI.
- the receiving terminal may estimate or obtain the TX-RX distance based on the location of the receiving terminal and the location of the transmitting terminal.
- the receiving terminal can know the communication range requirement used for the PSSCH by decoding the SCI related to the PSSCH.
- the time (offset) between the PSFCH and the PSSCH may be set or preset.
- this may be indicated to the base station by the terminal within coverage using the PUCCH.
- the transmitting terminal may transmit an indication to the serving base station of the transmitting terminal in a form such as a Scheduling Request (SR)/Buffer Status Report (BSR) instead of a HARQ ACK/NACK format.
- SR Scheduling Request
- BSR Buffer Status Report
- the base station can schedule the SL retransmission resource to the terminal.
- the time (offset) between the PSFCH and the PSSCH may be set or preset.
- TDM between PSCCH/PSSCH and PSFCH may be allowed for the PSFCH format for SL in the slot.
- a sequence-based PSFCH format having one symbol may be supported.
- the one symbol may not be an AGC interval.
- the sequence-based PSFCH format may be applied to unicast and groupcast.
- the PSFCH resource may be periodically set to N slot duration or set in advance.
- N may be set to one or more values of 1 or more.
- N can be 1, 2 or 4.
- HARQ feedback for transmission in a specific resource pool may be transmitted only through the PSFCH on the specific resource pool.
- slot #(N + A) may include a PSFCH resource.
- A may be the smallest integer greater than or equal to K.
- K may be the number of logical slots. In this case, K may be the number of slots in the resource pool. Or, for example, K may be the number of physical slots. In this case, K may be the number of slots inside and outside the resource pool.
- the receiving terminal when the receiving terminal transmits HARQ feedback on a PSFCH resource in response to one PSSCH transmitted by the transmitting terminal to the receiving terminal, the receiving terminal is based on an implicit mechanism within the configured resource pool. may determine a frequency domain and/or a code domain of For example, the receiving terminal is a slot index related to PSCCH / PSSCH / PSFCH, a subchannel related to PSCCH / PSSCH, and / or an identifier for distinguishing each receiving terminal in a group for HARQ feedback based on groupcast option 2 Based on at least one, a frequency domain and/or a code domain of the PSFCH resource may be determined. and/or, for example, the receiving terminal may determine the frequency domain and/or code domain of the PSFCH resource based on at least one of SL RSRP, SINR, L1 source ID, and/or location information.
- the UE when the HARQ feedback transmission through the PSFCH of the UE and the HARQ feedback reception through the PSFCH overlap, the UE either transmits the HARQ feedback through the PSFCH or receives the HARQ feedback through the PSFCH based on the priority rule.
- the priority rule may be based on a minimum priority indication of the relevant PSCCH / PSSCH.
- the UE may select a specific HARQ feedback transmission based on a priority rule.
- the priority rule may be based on a minimum priority indication of the relevant PSCCH / PSSCH.
- the wording "configure or define” may be interpreted as being (pre-) configured (via pre-defined signaling (eg, SIB, MAC signaling, RRC signaling)) from a base station or a network.
- pre-defined signaling eg, SIB, MAC signaling, RRC signaling
- “A may be configured” may include "that a base station or network (in advance) configures/defines or informs A for a terminal”.
- the wording "set or define” may be construed as being set or defined in advance by the system.
- “A may be set” may include "A is set/defined in advance by the system”.
- a transmitting terminal may be a terminal transmitting data to a (target) receiving terminal (RX UE).
- the transmitting terminal may be a terminal performing PSCCH and/or PSSCH transmission.
- the transmitting terminal may be a terminal transmitting an SL CSI-RS and/or SL CSI report request indicator to a (target) receiving terminal.
- the transmitting terminal provides a (target) receiving terminal with a (predefined) reference signal (eg, PSSCH DM-RS (demodulation reference signal)) and/or SL (L1) to be used for SL (L1) RSRP measurement. ) may be a terminal transmitting an RSRP report request indicator.
- the transmitting terminal is a (target) SL RLM (radio link monitoring) operation and / or SL RLF (radio link failure) operation of the receiving terminal, a (control) channel (eg, PSCCH, PSSCH, etc.) and / or it may be a terminal that transmits a reference signal (eg, DM-RS, CSI-RS, etc.) on the (control) channel.
- a (control) channel eg, PSCCH, PSSCH, etc.
- a reference signal eg, DM-RS, CSI-RS, etc.
- the receiving terminal transmits according to whether the decoding of data received from the transmitting terminal succeeds and/or the detection/decoding success of the PSCCH (related to PSSCH scheduling) transmitted by the transmitting terminal It may be a terminal that transmits SL HARQ feedback to the terminal.
- the receiving terminal may be a terminal performing SL CSI transmission to the transmitting terminal based on the SL CSI-RS and/or SL CSI report request indicator received from the transmitting terminal.
- the receiving terminal transmits the SL (L1) RSRP measurement value measured based on the (pre-defined) reference signal and/or the SL (L1) RSRP report request indicator received from the transmitting terminal to the transmitting terminal.
- the receiving terminal may be a terminal transmitting data of the receiving terminal to the transmitting terminal.
- the receiving terminal is a terminal that performs an SL RLM operation and/or an SL RLF operation based on a (pre-set) (control) channel and/or a reference signal on the (control) channel received from the transmitting terminal.
- the receiving terminal when the receiving terminal transmits SL HARQ feedback information for the PSSCH and/or PSCCH received from the transmitting terminal, the following method may be considered or partly considered.
- the corresponding scheme or some schemes may be limitedly applied only when the receiving terminal successfully decodes/detects the PSCCH for scheduling the PSSCH.
- ACK information is transmitted when PSSCH decoding/reception is successful, and NACK information is transmitted when it fails
- the PSCCH may be replaced/substituted with at least one of SCI, first SCI, and/or second SCI.
- the SCI may be interchanged/replaced with the PSCCH, the first SCI and/or the second SCI.
- the PSSCH since the transmitting terminal may transmit the second SCI to the receiving terminal through the PSSCH, the PSSCH may be substituted/substituted with the second SCI.
- the first SCI including the first SCI configuration field group is 1 st SCI or 1 It may be referred to as st -stage SCI
- the second SCI including the second SCI configuration field group may be referred to as 2nd SCI or 2nd -stage SCI.
- the first SCI may be transmitted through the PSCCH.
- the second SCI may be transmitted through a (independent) PSCCH.
- the second SCI may be piggybacked and transmitted together with data through the PSSCH.
- RLF may be interpreted as mutually extended to at least one of out of synch (OOS) and in synch (IS).
- a resource block (RB) may be substituted/substituted with a subcarrier.
- a packet or traffic may be replaced/replaced with a transport block (TB) or a medium access control protocol data unit (MAC PDU) according to a transmission layer.
- MAC PDU medium access control protocol data unit
- a code block group (CBG) may be substituted/substituted with a TB.
- the source ID may be substituted/replaced with the destination ID.
- the L1 ID may be substituted/replaced 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 the actual use or not is determined based on the SL HARQ feedback information received by the transmitting terminal from the receiving terminal. It may refer to an operation of reserving/selecting/determining a potential retransmission resource.
- a sub-selection window may be substituted/substituted with a selection window and/or a preset number of resource sets within the selection window.
- SL mode 1 is resource allocation in which the base station directly schedules the SL transmission resource for the transmitting terminal through predefined signaling (eg, DCI or RRC message). It may mean a method or a communication method.
- the SL mode 2 may refer to a resource allocation scheme or a communication scheme in which the terminal independently selects an SL transmission resource from a base station or a network or from a preset resource pool.
- a terminal performing SL communication based on SL mode 1 may be referred to as a mode 1 terminal (mode 1 terminal) or mode 1 transmission terminal (mode 1 transmission terminal), and SL communication based on SL mode 2
- the performing terminal may be referred to as a mode 2 terminal (mode 2 UE) or a mode 2 transmission terminal (mode 2 transmission terminal).
- a dynamic grant may be substituted/substituted with a configured grant (CG) and/or a semi-persistent scheduling grant (SPS).
- DG may be interchanged/substituted with a combination of CG and SPS grants.
- the CG may include at least one of CG type 1 (configured grant type 1) and/or CG type 2 (configured grant type 2).
- 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 Prioritization), delay (latency), reliability (reliability), minimum required communication range (minimum required communication range), PPPP (Prose Per-Packet Priority), SLRB (Sidelink Radio Bearer), QoS profile (profile), QoS parameters, and / or at least one of the requirements (requirement) and at least one may be interchanged / replaced.
- LCP Logical Channel Prioritization
- delay latency
- reliability reliability
- minimum required communication range minimum required communication range
- PPPP Prose Per-Packet Priority
- SLRB idelink Radio Bearer
- QoS profile profile
- QoS parameters and / or at least one of the requirements (requirement) and at least one may be interchanged / replaced.
- a (physical) channel used when a receiving terminal (RX UE) transmits at least one of the following information to a transmitting terminal (TX UE) is PSFCH
- 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 following (some) rules may be set to be applied.
- the transmitting terminal indicates that ACK (acknowledge) information (eg, MAC PDU reception/decoding succeeded) related to a transport packet (eg, MAC PDU) indicator) from the receiving terminal, only when (or continuously) received for a preset threshold number of times (or more than the threshold number), set to stop the retransmission operation of the MAC PDU (related to the ACK information) (and/or It may be set to flush a buffer (related to the SL HARQ process of the MAC PDU).
- ACK acknowledgenowledge
- MAC PDU reception/decoding succeeded related to a transport packet (eg, MAC PDU) indicator
- a transport packet eg, MAC PDU
- It may be set to flush a buffer (related to the SL HARQ process of the MAC PDU).
- the transmitting terminal when such a rule is applied, until the transmitting terminal receives (continuously) ACK information for a preset threshold number of times (or more than the threshold number), the transmitting terminal (ACK It may be interpreted as performing a retransmission operation of the MAC PDU (related to the ACK information) (regardless of information reception).
- the transmitting terminal (participating in the same service and / or belonging to the group of the same groupcast) collision (collision) (and / or half-duplex ( half duplex) problem) is detected, using a preset (existing, and/or new) PSFCH resource, according to the following (some) rules, may be configured to signal the collision.
- two bits may be signaled using the PSFCH.
- a total of five states may exist.
- reception for initial transmission succeeds, ii) reception for initial transmission fails + there is no problem with both future resources, iii) reception for initial transmission is failure + if there is a problem with the first of the two future resources, iv) the reception for the initial transmission fails + if there is a problem with the second of the two future resources, v) the reception for the initial transmission fails + the two futures There may be cases where there is a problem with all of the resources.
- the previous two states eg, the states of i) and ii) of these
- the existing HARQ ACK/NACK that is, the front of the two through HARQ ACK/NACK
- Two states of may be indicated to the transmitting terminal
- the receiving terminal ie, the HARQ feedback transmitting terminal
- transmits the existing HARQ ACK to the transmitting terminal (ie, the HARQ feedback receiving terminal)
- Two bits are additionally signaled. and, thereby, it is possible to inform which state of the following three states (eg, states of iii) to v)). For example, additional signaling may not need to be transmitted if there is no problem with future resources.
- a method of selecting a sequence/resource according to the above five states by configuring a PSFCH resource is proposed.
- the previous two states eg, states of i) and ii
- the request form may be a broadcast form.
- a target receiving terminal of terminal B or terminal A eg, a short-range terminal to which terminal B intends to transmit a high priority/QoS packet (channel condition metric) may respond in consideration of this.
- the transmitting terminal when (transmitting terminal) operates in mode 1 (CG or DG), the transmitting terminal reports ACK information to the base station through PUCCH, or attempts to report ACK information to the base station.
- the transmitting terminal may be configured to flush an SL HARQ buffer (related to ACK information).
- the terminal reporting ACK information (to the base station) through the PUCCH may be interpreted as not expecting reception of a retransmission resource allocation related grant (DG) from the base station.
- DG retransmission resource allocation related grant
- the terminal uses the last CG resource allocated/scheduled within the CG period when retransmission based on allocated/scheduled CG resources within the CG period reaches MAX_RETX, and or when the last allocated/scheduled CG resource within a CG period passes (on the time domain), and/or before the next CG period related allocated/scheduled CG resource appears (immediately) to flush the associated SL HARQ buffer.
- the terminal may be configured to flush the associated SL HARQ buffer.
- the UE may be interpreted as transmitting ACK information through the buffer-flushed SL HARQ process related PUCCH.
- the transmitting terminal when (transmitting terminal) operates in mode 2, the transmitting terminal is a candidate resource in which a high amount of interference (than a preset threshold level) detected based on a sensing operation is measured within a selection window. may be excluded (Rule A). And/or, for example, the transmitting terminal (within the sensing period) is assumed on a slot that has not been monitored due to its own transmission operation, etc., which overlaps with the transmission of another virtual terminal (conflicting) candidate resources are excluded (Rule B) can.
- the final selectable remaining resource (minimum) ratio (X_VAL) in the preset selection window for each priority (transport packet of the transmitting terminal) may not be satisfied.
- the terminal applies rule A (and/or rule B), then the remaining selection Possible resources may be reported (finally) to the MAC layer (layer).
- the UE increases the (PSCCH and/or PSSCH) DM-RS RSRP threshold related to sensing (and/or, resource determination with high interference potential) to satisfy the (minimum) ratio of X_VAL. It can be reported to the MAC layer without
- a maximum value to which the value can be increased may be defined/set.
- application of the method (and/or determining/expecting that it will not satisfy the final selectable remaining resource (minimum) ratio of X_VAL) is limited to the case where the following (partial) conditions are satisfied. have.
- the terminal when (transmitting terminal) operates in mode 2, the terminal performs (in advance) through an additional sensing operation set in advance among the resources on the selection window (generated based on the remaining PDB related to the transport packet). Excludes resources whose interference amount is higher than the set threshold level (and/or (within the sensing period)) that is assumed on a slot not monitored by its own transmission operation, etc. ), a slot from which a selectable candidate resource is derived from among the remaining resources (a number of preset (minimum) slots) is designated, but it may be set to preferentially designate/select an earlier one in the time domain.
- the additional sensing operation may mean a sensing operation of a preset length (consisting of consecutive slots) before (and/or after) slot N time point at which resource selection is triggered.
- RESEL_NUM when transmission of a preset number (and/or number of MAC PDUs) (RESEL_NUM) is omitted on the generated (mode 2) SL grant-related resource, the transmitting terminal reselects the resource (and / or regenerating the SL grant).
- RESEL_NUM counting may be set to be performed only for transmission omission that satisfies the following (partial) conditions.
- the wording "skip transmission" is transmitted when no MAC PDU to be transmitted is made, and/or the transmitting terminal receives an ACK from the receiving terminal (via PSFCH) to the associated MAC PDU.
- omission of transmission when no additional retransmission is required, and/or omission of transmission due to prioritization (or related to MAC PDUs generated due to priority comparison), and/or congestion control Due to (or omitting transmission related to MAC PDUs generated due to congestion control) may be interpreted as being limited.
- the priority comparison may include UL-SL priority comparison, NR SL-LTE SL priority comparison, and the like.
- transmission omission on (SL grant-related) resources not signaled through the preceding SCI is not counted (for transmission omission), and/or transmission omission on (SL grant-related) resources signaled through the preceding SCI only This can be interpreted in the form of counting (for omitting transmission).
- (transmitting terminal) (mode 2) When performing periodic resource reservation, the transmitting terminal is used for (actual) SL (packet) transmission of at least one of the reserved resources within the period, resource re- It may be set not to count in "consecutive unused transmission opportunities" for selection triggering / performing check. That is, when SL transmission is performed on even one of the resources included in the reserved period, the transmitting terminal may maintain (without increasing) a continuous unused transmission opportunity value. For example, when SL transmission is not performed on all resources included in the reserved period, the transmitting terminal may increase the consecutive unused transmission opportunity value by 1. For example, when the consecutive unused transmission opportunity value reaches a threshold value related to the consecutive unused transmission opportunity, the transmitting terminal may trigger resource reselection.
- all reserved resources within the period are not used for (actual) SL (packet) transmission purposes (eg, UL/SL priority comparison, and/or LTE SL/ NR SL priority comparison, and/or congestion control on the reserved resource by at least one of (or, not including) the case of (or not including) the omission of (actual) SL (packet) transmission on the reserved resource only, "consecutive unused It can be construed as being counted as "transmission opportunity”.
- FIG. 11 illustrates an example of triggering resource reselection based on consecutive unused transmission opportunities according to an embodiment of the present disclosure.
- the embodiment of FIG. 11 may be combined with various embodiments of the present disclosure.
- a hatched rectangle may indicate a resource (actually) used for SL transmission
- a non-hatched rectangle may indicate a resource not used for SL transmission.
- sl-ReselectAfter may mean a threshold value related to consecutive unused transmission opportunities. For example, when all of the transmission resources within each period are not used for SL transmission, the above-described consecutive unused transmission opportunity value may increase by 1. And, for example, when at least one resource among transmission resources within each period is used for SL transmission, the above-described consecutive unused transmission opportunity value may be reset to 0.
- FIG. 11 may show an example in which it is assumed that the sl-ReselectAfter value is set to 3 for the transmitting terminal.
- SL transmission is not performed on all resources included in the first period, and thus, the consecutive unused transmission opportunity value increases by 1.
- the consecutive unused transmission opportunity value is reset to 0 after the second period has elapsed. That is, since resource non-use does not occur continuously from the first period, the consecutive unused transmission opportunity value may be interpreted as being reset.
- the transmitting terminal may trigger resource reselection.
- the transmitting terminal based on the preset (TB-related) minimum number of transmissions (MIN_TXNUM), whether ACK information is received from the receiving terminal (and/or successful reception of the TB of the receiving terminal) Regardless of , it may be configured to perform MIN_TXNUM transmission operations related to TB. For example, whether the MIN_TXNUM th and subsequent transmissions are performed/needed may be determined/determined based on SL HARQ feedback information that the transmitting terminal receives from the receiving terminal.
- MIN_TXNUM minimum number of transmissions
- congestion control and/or (terminal's) (absolute or relative) movement speed and/or synchronization reference source type (eg, terminal, NB, GNSS)) related physical parameter restrictions) (restriction) (TXPARA_RST)
- selectable maximum value / number of physical parameters eg, maximum (allowed) number of retransmissions / transmission power value / number of transmission RBs / MCS index (index) (range)
- the transmitting terminal may be configured to apply the minimum (or maximum, or (weighted) average) value/number of MIN_TXNUM and TXPARA_RST.
- the MIN_TXNUM-related transmission operation may be set to be (always) performed regardless of TXPARA_RST.
- the rule may be limitedly applied only when the transmitting terminal performs SL (groupcast) communication based on NACK only HARQ feedback with the receiving terminal.
- service type (and/or (LCH or service) priority and/or QOS requirements (eg delay, reliability, minimum communication range) and/or PQI parameters) (and/or HARQ feedback allowed ( enabled) (and / or disabled) LCH / MAC PDU (transmission) and / or CBR measurement value and / or SL cast type (type) of the resource pool (eg, unicast, groupcast, broadcast) And / or SL groupcast HARQ feedback option (eg, NACK only feedback, ACK / NACK feedback, TX-RX distance based NACK only feedback) and / or SL mode 1 CG type (eg, SL CG type 1 / 2) and/or SL mode (mode) type (eg, mode 1/2) and/or resource pool and/or PSFCH resource configured resource pool and/or periodic resource reservation operation (and/or aperiodic resource) Reservation operation) is allowed / configured (or allowed / not set) on the resource pool and / or partial sensing operation (and
- configuration informs the terminal through a pre-defined (physical layer or higher layer) channel/signal (eg, SIB, RRC, MAC CE) by the base station is a form (and/or, a form provided through a preset (pre-configuration), and/or a terminal pre-defined (physical layer or higher layer) channel / signal (eg, SL MAC CE, PC5) It can be interpreted as a form of informing other terminals through RRC), etc.
- a pre-defined (physical layer or higher layer) channel/signal eg, SIB, RRC, MAC CE
- PSFCH wording is "(NR or LTE) PSSCH (and / or (NR or LTE) PSCCH) (and / or (NR or LTE) SL SSB (and / or UL channel / signal))" can be interpreted as (mutually) extended.
- the schemes proposed in the present disclosure may be used in combination with each other (in a new type of scheme).
- the wording "power saving” (and/or “SL DRX”) may be extended and interpreted as “resource selection based on partial sensing” (and/or “resource selection based on random selection”).
- a transmitting terminal reserves a periodic transmission resource, it is possible to reduce resource collisions that may occur with another transmitting terminal that does not know that the periodic transmission resource is reserved.
- FIG. 12 illustrates a procedure in which a first device performs wireless communication, according to an embodiment of the present disclosure.
- the embodiment of FIG. 12 may be combined with various embodiments of the present disclosure.
- the first device may acquire a threshold value related to a continuous unused transmission opportunity.
- the first device may determine a sensing window.
- the first device may perform resource selection for at least one period based on sensing performed in the sensing window. For example, each of the at least one period may include at least one transmission resource.
- the first device may increase the value related to the consecutive unused transmission opportunity by 1 based on the fact that transmission is not performed on all transmission resources within the first period included in the at least one period.
- the first device may trigger resource reselection based on the value related to the consecutive unused transmission opportunities reaching a threshold value related to the unused transmission opportunities.
- the value related to the consecutive unused transmission opportunity may not increase based on the transmission being performed based on the transmission resource in the second period included in the at least one period.
- transmission that is not performed in all transmission resources within the first period may be SL transmission.
- transmission may not be performed in all transmission resources within the first period.
- transmission may not be performed on all transmission resources within the first period.
- LTE long term evolution
- NR new radio
- transmission may not be performed in all transmission resources within the first period.
- transmission may not be performed in all the transmission resources in the first period.
- the sidelink control information (SCI) related to the resource selection may include information related to all transmission resources for which transmission is not performed within the first period.
- the first device transmits an SCI for scheduling of a physical sidelink shared channel (PSSCH) to the second device through a physical sidelink control channel (PSCCH) based on the resource selected by the resource selection.
- PSSCH physical sidelink shared channel
- PSCCH physical sidelink control channel
- MAC medium access control protocol data unit
- the first device may receive a hybrid automatic repeat request (HARQ) acknowledgment (ACK) related to the MAC PDU from the second device. For example, based on the reception of the HARQ ACK, transmission may not be performed in all transmission resources within the first period.
- HARQ hybrid automatic repeat request
- ACK acknowledgment
- the HARQ ACK may be received a threshold number of times.
- the HARQ ACK may be continuously received.
- the resource selection is performed on a selection window based on the increased RSRP threshold, and the RSRP threshold expires at the end of the selection window when a packet delay budget (PDB) associated with a MAC PDU to be transmitted expires.
- PDB packet delay budget
- the processor 102 of the first device 100 may obtain a threshold value associated with a consecutive unused transmission opportunity.
- the processor 102 of the first device 100 may determine a sensing window.
- the processor 102 of the first device 100 may perform resource selection for at least one period based on sensing performed in the sensing window.
- each of the at least one period may include at least one transmission resource.
- the processor 102 of the first device 100 sets a value related to a continuous unused transmission opportunity to 1 based on the fact that transmission is not performed in all transmission resources within the first period included in the at least one period. can increase
- the processor 102 of the first device 100 may trigger resource reselection based on the value related to the consecutive unused transmission opportunities reaching a threshold value related to the unused transmission opportunities.
- a first device for performing wireless communication may include one or more memories for 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 threshold value associated with a successive unused transmission opportunity; determine a sensing window; based on the sensing performed in the sensing window, performing resource selection for at least one period, wherein the at least one period includes at least one transmission resource, respectively; increasing a value related to consecutive unused transmission opportunities by 1 based on the fact that transmission is not performed in all transmission resources within a first period included in the at least one period; and based on the value related to the consecutive unused transmission opportunities reaching a threshold value related to the unused transmission opportunities, trigger resource reselection.
- an apparatus configured to control the first terminal.
- the apparatus may include 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 threshold value associated with a successive unused transmission opportunity; determine a sensing window; based on the sensing performed in the sensing window, performing resource selection for at least one period, wherein the at least one period includes at least one transmission resource, respectively; increasing a value related to consecutive unused transmission opportunities by 1 based on the fact that transmission is not performed in all transmission resources within a first period included in the at least one period; and based on the value related to the consecutive unused transmission opportunities reaching a threshold value related to the unused transmission opportunities, trigger resource reselection.
- a non-transitory computer-readable storage medium recording instructions may be provided.
- the instructions when executed, cause the first device to: obtain a threshold value associated with a consecutive unused transmission opportunity; determine a sensing window; based on sensing performed in the sensing window, perform resource selection for at least one period, wherein the at least one period includes at least one transmission resource, respectively; increase a value related to consecutive unused transmission opportunities by 1 based on the fact that transmission is not performed in all transmission resources within a first period included in the at least one period; and triggering resource reselection based on the value related to the consecutive unused transmission opportunities reaching a threshold value related to the unused transmission opportunities.
- FIG. 13 illustrates a procedure in which a second device performs wireless communication based on a sidelink (SL) discontinuous reception (DRX) setting, according to an embodiment of the present disclosure.
- the embodiment of FIG. 13 may be combined with various embodiments of the present disclosure.
- a second device may receive an SCI for scheduling a PSSCH from a first device through a PSCCH based on a resource selected based on resource reselection.
- the second device may receive a MAC PDU from the first device through the PSSCH based on the resource selected based on the resource reselection. For example, based on the fact that transmission is not performed in all transmission resources in the first period included in at least one period selected by the first device, a value related to consecutive unused transmission opportunities is increased by 1, and The resource reselection may be triggered based on the value associated with the consecutive unused transmission opportunities reaching a threshold value associated with the consecutive unused transmission opportunities.
- transmission that is not performed in all transmission resources within the first period may be SL transmission.
- the processor 202 of the second device 200 is a transceiver ( 206) can be controlled. Then, the processor 202 of the second device 200 is configured to receive the MAC PDU through the PSSCH from the first device 100 based on the resource selected based on the resource reselection. ) can be controlled. For example, based on the fact that transmission is not performed in all transmission resources in the first period included in at least one period selected by the first device, a value related to consecutive unused transmission opportunities is increased by 1, and The resource reselection may be triggered based on the value associated with the consecutive unused transmission opportunities reaching a threshold value associated with the consecutive unused transmission opportunities.
- a second device for performing wireless communication may include one or more memories for 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 receive, from the first device, an SCI for scheduling of a PSSCH through a PSCCH, based on a resource selected based on resource reselection; and receiving, from the first device, a MAC PDU through the PSSCH based on the resource selected based on the resource reselection, and all transmissions within the first period included in at least one period selected by the first device.
- the resource reselection indicates that the value associated with consecutive unused transmission opportunities is at a threshold value associated with consecutive unused transmission opportunities. It can be triggered based on arrival.
- transmission that is not performed in all transmission resources within the first period may be SL transmission.
- FIG. 14 shows a communication system 1 according to an embodiment of the present disclosure.
- the embodiment of FIG. 14 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 refers to 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.
- 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 portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, smart glasses), a computer (eg, a notebook 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.) technology (e.g.
- Wireless communication/connection 150a, 150b, 150c enables a wireless device and a base station/radio device, and a base station and a base station to transmit/receive wireless signals to each other
- the wireless communication/connection 150a, 150b, 150c may transmit/receive a signal through various physical channels.
- transmission/reception of a wireless signal At least some of various configuration information setting processes for
- FIG. 15 illustrates a wireless device according to an embodiment of the present disclosure.
- the embodiment of FIG. 15 may be combined with various embodiments of the present disclosure.
- the first wireless device 100 and the second wireless device 200 may transmit/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. 14 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 flow charts 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 to the processor 102 , and may transmit and/or receive wireless signals via one or more antennas 108 .
- the transceiver 106 may include a transmitter and/or a receiver.
- the transceiver 106 may be used interchangeably with a radio frequency (RF) unit.
- 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, 202 may transmit signals (eg, baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and/or methods disclosed herein. generated and provided to one or more transceivers (106, 206).
- the one or more processors 102 , 202 may receive signals (eg, baseband signals) from one or more transceivers 106 , 206 , and may include descriptions, functions, procedures, proposals, methods and/or methods disclosed herein.
- PDU, SDU, message, control information, data or information may be obtained according to the operation flowcharts.
- 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.
- FIG. 16 illustrates a signal processing circuit for a transmission signal according to an embodiment of the present disclosure.
- the embodiment of FIG. 16 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. 16 may be performed by the processors 102 , 202 and/or transceivers 106 , 206 of FIG. 15 .
- the hardware elements of FIG. 16 may be implemented in the processors 102 , 202 and/or transceivers 106 , 206 of FIG. 15 .
- blocks 1010 to 1060 may be implemented in the processors 102 and 202 of FIG. 15 .
- blocks 1010 to 1050 may be implemented in the processors 102 and 202 of FIG. 15
- block 1060 may be implemented in the transceivers 106 and 206 of FIG. 15 .
- the codeword may be converted into a wireless signal through the signal processing circuit 1000 of FIG. 16 .
- 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
- a signal processing process for a received signal in the wireless device may be configured in reverse of the signal processing process 1010 to 1060 of FIG. 16 .
- the wireless device eg, 100 and 200 in FIG. 15
- 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. 17 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. 14 ).
- the embodiment of FIG. 17 may be combined with various embodiments of the present disclosure.
- wireless devices 100 and 200 correspond to wireless devices 100 and 200 of FIG. 15 , and various elements, components, units/units, and/or modules ) may consist 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. 15 .
- transceiver(s) 114 may include one or more transceivers 106 , 206 and/or one or more antennas 108 , 208 of FIG.
- 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. For example, 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 . In addition, the control unit 120 transmits the information stored in the memory unit 130 to the outside (eg, another communication device) through the communication unit 110 through a wireless/wired interface, or through the communication unit 110 to an external ( For example, information received from another communication device through a wireless/wired interface 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.
- a wireless device may include a robot ( FIGS. 14 and 100a ), a vehicle ( FIGS. 14 , 100b-1 , 100b-2 ), an XR device ( FIGS. 14 and 100c ), a mobile device ( FIGS. 14 and 100d ), and a home appliance. (FIG. 14, 100e), IoT device (FIG.
- digital broadcasting terminal digital broadcasting terminal
- hologram device public safety device
- MTC device medical device
- fintech device or financial device
- security device climate/environment device
- It may be implemented in the form of an AI server/device ( FIGS. 14 and 400 ), a base station ( FIGS. 14 and 200 ), and a network node.
- 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 all 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 . 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. 17 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 notebook 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). 18 may be combined with various embodiments of the present disclosure.
- the portable device 100 includes an antenna unit 108 , a communication unit 110 , a control unit 120 , a memory unit 130 , a power supply unit 140a , an interface unit 140b , and an input/output unit 140c . ) may be included.
- the antenna unit 108 may be configured as a part of the communication unit 110 .
- Blocks 110 to 130/140a to 140c respectively correspond to blocks 110 to 130/140 of FIG. 17 .
- 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 stored in 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 then output in various forms (eg, text, voice, image, video, haptic) through the input/output unit 140c.
- information/signals eg, touch, text, voice, image, video
- 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 then output in various forms (eg, text, voice, image, video, haptic) through the input/output unit
- FIG. 19 illustrates a vehicle or an autonomous driving vehicle according to an embodiment of the present disclosure.
- 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. 19 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. 17, respectively.
- the communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with external devices such as other vehicles, base stations (e.g., 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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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,연속적인 미사용 전송 기회(consecutive unused transmission opportunity)와 관련된 임계 값을 획득하는 단계;센싱 윈도우를 결정하는 단계;상기 센싱 윈도우에서 수행되는 센싱을 기반으로, 적어도 하나의 주기에 대한 자원 선택을 수행하되,상기 적어도 하나의 주기는 각각 적어도 하나의 전송 자원을 포함하는, 단계;상기 적어도 하나의 주기에 포함되는 제 1 주기 내 모든 전송 자원에서 전송이 수행되지 않는 것을 기반으로, 연속적인 미사용 전송 기회와 관련된 값을 1 증가시키는 단계; 및상기 연속적인 미사용 전송 기회와 관련된 값이 상기 미사용 전송 기회와 관련된 임계 값에 도달하는 것을 기반으로, 자원 재선택을 트리거링하는 단계를 포함하는, 방법.
- 제 1 항에 있어서,상기 적어도 하나의 주기에 포함되는 제 2 주기 내 전송 자원을 기반으로 전송이 수행되는 것을 기반으로, 상기 연속적인 미사용 전송 기회와 관련된 값은 증가되지 않는, 방법.
- 제 1 항에 있어서,상기 제 1 주기 내 모든 전송 자원에서 수행되지 않는 전송은 SL 전송인, 방법.
- 제 1 항에 있어서,UL(uplink)/SL(sidelink) 우선순위 비교(prioritization)를 기반으로, 상기 제 1 주기 내 모든 전송 자원에서 전송이 수행되지 않는, 방법.
- 제 1 항에 있어서,LTE(long term evolution)/NR(new radio) 우선순위 비교를 기반으로, 상기 제 1 주기 내 모든 전송 자원에서 전송이 수행되지 않는, 방법.
- 제 1 항에 있어서,혼잡 제어(congestion control)를 기반으로, 상기 제 1 주기 내 모든 전송 자원에서 전송이 수행되지 않는, 방법.
- 제 1 항에 있어서,상기 제 1 주기 내 모든 전송 자원이 자원 재선택으로 인해 다른 자원으로 대체되는 것을 기반으로, 상기 제 1 주기 내 모든 전송 자원에서 전송이 수행되지 않는, 방법.
- 제 1 항에 있어서,상기 자원 선택과 관련된 SCI(sidelink control information)는 상기 제 1 주기 내 전송이 수행되지 않는 모든 전송 자원과 관련된 정보를 포함하는, 방법.
- 제 1 항에 있어서,상기 자원 선택으로 선택된 자원을 기반으로, PSCCH(physical sidelink control channel)를 통해 PSSCH(physical sidelink shared channel)의 스케줄링을 위한 SCI를 제 2 장치에게 전송하는 단계; 및상기 자원 선택으로 선택된 자원을 기반으로, 상기 PSSCH를 통해 MAC(medium access control) PDU(protocol data unit)를 상기 제 2 장치에게 전송하는 단계를 더 포함하는, 방법.
- 제 9 항에 있어서,상기 제 2 장치로부터 상기 MAC PDU와 관련된 HARQ(hybrid automatic repeat request) ACK(acknowledge)를 수신하는 단계를 더 포함하되,상기 HARQ ACK의 수신을 기반으로, 상기 제 1 주기 내 모든 전송 자원에서 전송이 수행되지 않는, 방법.
- 제 10 항에 있어서,상기 HARQ ACK이 임계 횟수만큼 수신되는, 방법.
- 제 11 항에 있어서,상기 HARQ ACK은 연속적으로 수신되는, 방법.
- 제 1 항에 있어서,상기 자원 선택은 증가된 RSRP 임계 값을 기반으로, 선택 윈도우 상에서 수행되고,상기 RSRP 임계 값은, 전송될 MAC PDU와 관련된 PDB(packet delay budget)가 상기 선택 윈도우의 종료 시점에서 만료되는 것을 기반으로 증가되는, 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,연속적인 미사용 전송 기회(consecutive unused transmission opportunity)와 관련된 임계 값을 획득하고;센싱 윈도우를 결정하고;상기 센싱 윈도우에서 수행되는 센싱을 기반으로, 적어도 하나의 주기에 대한 자원 선택을 수행하되,상기 적어도 하나의 주기는 각각 적어도 하나의 전송 자원을 포함하고;상기 적어도 하나의 주기에 포함되는 제 1 주기 내 모든 전송 자원에서 전송이 수행되지 않는 것을 기반으로, 연속적인 미사용 전송 기회와 관련된 값을 1 증가시키고; 및상기 연속적인 미사용 전송 기회와 관련된 값이 상기 미사용 전송 기회와 관련된 임계 값에 도달하는 것을 기반으로, 자원 재선택을 트리거링하는, 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 명령들을 저장하는 하나 이상의 메모리를 포함하되, 상기 하나 이상의 프로세서는 상기 명령어들을 실행하여,연속적인 미사용 전송 기회(consecutive unused transmission opportunity)와 관련된 임계 값을 획득하고;센싱 윈도우를 결정하고;상기 센싱 윈도우에서 수행되는 센싱을 기반으로, 적어도 하나의 주기에 대한 자원 선택을 수행하되,상기 적어도 하나의 주기는 각각 적어도 하나의 전송 자원을 포함하고;상기 적어도 하나의 주기에 포함되는 제 1 주기 내 모든 전송 자원에서 전송이 수행되지 않는 것을 기반으로, 연속적인 미사용 전송 기회와 관련된 값을 1 증가시키고; 및상기 연속적인 미사용 전송 기회와 관련된 값이 상기 미사용 전송 기회와 관련된 임계 값에 도달하는 것을 기반으로, 자원 재선택을 트리거링하는, 장치.
- 명령들을 기록하고 있는 비-일시적 컴퓨터 판독가능 저장 매체로서,상기 명령들은, 실행될 때, 제 1 장치로 하여금:연속적인 미사용 전송 기회(consecutive unused transmission opportunity)와 관련된 임계 값을 획득하게 하고;센싱 윈도우를 결정하게 하고;상기 센싱 윈도우에서 수행되는 센싱을 기반으로, 적어도 하나의 주기에 대한 자원 선택을 수행하게 하되,상기 적어도 하나의 주기는 각각 적어도 하나의 전송 자원을 포함하고;상기 적어도 하나의 주기에 포함되는 제 1 주기 내 모든 전송 자원에서 전송이 수행되지 않는 것을 기반으로, 연속적인 미사용 전송 기회와 관련된 값을 1 증가시키게 하고; 및상기 연속적인 미사용 전송 기회와 관련된 값이 상기 미사용 전송 기회와 관련된 임계 값에 도달하는 것을 기반으로, 자원 재선택을 트리거링하게 하는, 비-일시적 컴퓨터 판독가능 저장 매체.
- 제 2 장치가 무선 통신을 수행하는 방법에 있어서,제 1 장치로부터, 자원 재선택을 기반으로 선택된 자원을 기반으로, PSCCH를 통해 PSSCH의 스케줄링을 위한 SCI를 수신하는 단계; 및상기 제 1 장치로부터, 상기 자원 재선택을 기반으로 선택된 자원을 기반으로, 상기 PSSCH를 통해 MAC PDU를 수신하는 단계를 포함하되,상기 제 1 장치에 의해 선택된 적어도 하나의 주기에 포함되는 제 1 주기 내 모든 전송 자원에서 전송이 수행되지 않는 것을 기반으로, 연속적인 미사용 전송 기회와 관련된 값은 1 증가되고, 및상기 자원 재선택은 상기 연속적인 미사용 전송 기회와 관련된 값이 연속적인 미사용 전송 기회와 관련된 임계 값에 도달하는 것을 기반으로 트리거링되는, 방법.
- 제 17 항에 있어서,상기 제 1 주기 내 모든 전송 자원에서 수행되지 않는 전송은 SL 전송인, 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 장치로부터, 자원 재선택을 기반으로 선택된 자원을 기반으로, PSCCH를 통해 PSSCH의 스케줄링을 위한 SCI를 수신하고; 및상기 제 1 장치로부터, 상기 자원 재선택을 기반으로 선택된 자원을 기반으로, 상기 PSSCH를 통해 MAC PDU를 수신하되,상기 제 1 장치에 의해 선택된 적어도 하나의 주기에 포함되는 제 1 주기 내 모든 전송 자원에서 전송이 수행되지 않는 것을 기반으로, 연속적인 미사용 전송 기회와 관련된 값은 1 증가되고, 및상기 자원 재선택은 상기 연속적인 미사용 전송 기회와 관련된 값이 연속적인 미사용 전송 기회와 관련된 임계 값에 도달하는 것을 기반으로 트리거링되는, 제 2 장치.
- 제 19 항에 있어서,상기 제 1 주기 내 모든 전송 자원에서 수행되지 않는 전송은 SL 전송인, 제 2 장치.
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| CN202280007224.8A CN116368919B (zh) | 2021-01-18 | 2022-01-18 | 用于改进nr v2x中的资源分配的方法和装置 |
| KR1020237010723A KR102757784B1 (ko) | 2021-01-18 | 2022-01-18 | Nr v2x에서 자원 할당을 향상시키는 방법 및 장치 |
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| US12232168B2 (en) | 2025-02-18 |
| KR102757784B1 (ko) | 2025-01-21 |
| KR20230058465A (ko) | 2023-05-03 |
| CN116368919A (zh) | 2023-06-30 |
| CN116368919B (zh) | 2024-09-10 |
| US20230199838A1 (en) | 2023-06-22 |
| US11877320B2 (en) | 2024-01-16 |
| US20220232627A1 (en) | 2022-07-21 |
| EP4207909A4 (en) | 2024-03-20 |
| EP4207909A1 (en) | 2023-07-05 |
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