Method and apparatus for selecting transmission resources in nr v2x

Abstract

A method by which a first device performs wireless communication is presented. The method can include the steps of reevaluating a first transmission resource for performing sidelink communication, reselecting the first transmission resource based on the reevaluation, and reselecting a second transmission resource based on the reselection of the first transmission resource. For example, the second transmission resource can be a resource selected by the first device prior to the reselection of the first transmission resource. For example, the second transmission resource can be a resource that is not reserved by the first device.

Description

Technical Field

[0001] This disclosure relates to wireless communication systems. Background Technology

[0002] Sidelink (SL) communication is a communication scheme that establishes a direct link between user equipment (UE) and allows UEs to directly exchange voice and data without the intervention of evolved Node B (eNB). SL communication is being considered as a solution to the eNB overhead caused by the rapid growth of data traffic. V2X (Vehicle-to-Everything) refers to a communication technology used by vehicles to exchange information with other vehicles, pedestrians, and objects equipped with infrastructure. V2X can be divided into four types: V2V (Vehicle-to-Vehicle), V2I (Vehicle-to-Infrastructure), V2N (Vehicle-to-Network), and V2P (Vehicle-to-Pedestrian). V2X communication can be provided through the PC5 interface and / or the Uu interface.

[0003] Furthermore, the increasing demand for larger communication capacity from various communication devices has led to a growing need for enhanced mobile broadband communications compared to traditional radio access technologies (RATs). Consequently, the design of communication systems for UEs or services sensitive to reliability and latency is under discussion. Next-generation radio access technologies based on enhanced mobile broadband communications, massive machine-type communications (MTC), and ultra-reliable low-latency communications (URLLC) can be termed novel RATs or NRs (new radio technologies). In this paper, NR can also support vehicle-to-everything (V2X) communications.

[0004] Figure 1 This is a diagram used to describe NR-based V2X communication compared to the RAT-based V2X communication previously used. Figure 1 The implementation methods can be combined with various implementation methods of this disclosure.

[0005] Regarding V2X communication, when discussing the RAT used prior to NR, the focus was on schemes that provided security services based on V2X messages such as BSM (Basic Security Message), CAM (Cooperation Awareness Message), and DENM (Distributed Environment Notification Message). V2X messages can include location information, dynamic information, attribute information, etc. For example, a UE can send periodic message type CAM and / or event-triggered message type DENM to another UE.

[0006] Subsequently, various V2X scenarios were proposed in NR regarding V2X communication. These scenarios could include vehicle queuing, advanced driving, extended sensors, and remote driving. Summary of the Invention

[0007] Technical issues

[0008] Meanwhile, when the UE performs a re-evaluation operation on transmission resources, due to the triggering / execution of the reselected transmission resources (RSC_REV), the predetermined time limit may not be maintained for transmission resources determined before the UE signals the SCI (e.g., the time gap between transmission resources that can be signaled by an SCI).

[0009] Technical solution

[0010] In one embodiment, a method is provided for performing wireless communication by a first device. The method may include: re-evaluating a first transmission resource for performing sidelink communication; reselecting the first transmission resource based on the re-evaluation; and reselecting a second transmission resource based on the reselection of the first transmission resource. For example, the second transmission resource may be a resource selected by the first device prior to the reselection of the first transmission resource. For example, the second transmission resource may be a resource not reserved by the first device.

[0011] In one embodiment, a first device adapted to perform wireless communication is provided. The first device may include: one or more memories storing instructions; one or more transceivers; and one or more processors connected to the one or more memories and the one or more transceivers. The one or more processors may execute instructions to: re-evaluate a first transmission resource for performing sidelink communication; reselect the first transmission resource based on the re-evaluation; and reselect a second transmission resource based on the reselection of the first transmission resource. For example, the second transmission resource may be a resource selected by the first device prior to the reselection of the first transmission resource. For example, the second transmission resource may be a resource not reserved by the first device.

[0012] Beneficial effects

[0013] User equipment (UE) can perform SL communication efficiently. Attached Figure Description

[0014] Figure 1 This is a diagram used to describe NR-based V2X communication compared to the RAT-based V2X communication previously used.

[0015] Figure 2 The structure of an NR system according to an embodiment of the present disclosure is shown.

[0016] Figure 3 A radio protocol architecture according to an embodiment of this disclosure is shown.

[0017] Figure 4The structure of an NR radio frame according to an embodiment of the present disclosure is shown.

[0018] Figure 5 The structure of a time slot for an NR frame according to an embodiment of the present disclosure is shown.

[0019] Figure 6 An example of a BWP according to an embodiment of this disclosure is shown.

[0020] Figure 7 A UE performing V2X or SL communication according to an embodiment of this disclosure is shown.

[0021] Figure 8 The process of a UE performing V2X or SL communication based on a transmission mode according to an embodiment of the present disclosure is illustrated.

[0022] Figure 9 Three broadcast types according to embodiments of this disclosure are shown.

[0023] Figure 10 A method is shown in which a UE that has reserved transmission resources notifies another UE of transmission resources, based on an embodiment of the present disclosure.

[0024] Figure 11 The process of a transmitting UE re-selecting resources and performing sidelink communication with a receiving UE based on a resource re-evaluation, according to an embodiment of the present disclosure, is illustrated.

[0025] Figure 12 An example of reselecting resources based on re-evaluated resources, based on embodiments of this disclosure, is shown.

[0026] Figure 13 An example of reselecting a periodic resource based on a re-evaluated periodic resource, based on an embodiment of this disclosure, is shown.

[0027] Figure 14 A method for performing resource reselection based on a re-evaluation of a first transmission resource is illustrated in an embodiment of the present disclosure.

[0028] Figure 15 A method for a second device to perform sidelink communication with a first device is illustrated based on an embodiment of the present disclosure.

[0029] Figure 16 A communication system 1 based on an embodiment of the present disclosure is shown.

[0030] Figure 17 A wireless device based on an embodiment of the present disclosure is shown.

[0031] Figure 18A signal processing circuit for transmitting signals based on an embodiment of the present disclosure is shown.

[0032] Figure 19 Another example of a wireless device based on an embodiment of this disclosure is shown.

[0033] Figure 20 A handheld device based on an embodiment of the present disclosure is shown.

[0034] Figure 21 Vehicles or autonomous vehicles based on embodiments of this disclosure are shown. Detailed Implementation

[0035] In this disclosure, "A or B" may mean "A only", "B only", or "both A and B". In other words, in this disclosure, "A or B" can be interpreted as "A and / or B". For example, in this disclosure, "A, B or C" may mean "A only", "B only", "C only", or "any combination of A, B, and C".

[0036] The forward slash ( / ) or comma used in this disclosure can mean "and / or". For example, "A / B" can mean "A and / or B". Therefore, "A / B" can mean "A only", "B only", or "both A and B". For example, "A, B, C" can mean "A, B, or C".

[0037] In this disclosure, "at least one of A and B" can mean "only A", "only B" or "both A and B". Additionally, in this disclosure, the expression "at least one of A or B" or "at least one of A and / or B" can be interpreted as "at least one of A and B".

[0038] Additionally, in this disclosure, "at least one of A, B, and C" may mean "A only", "B only", "C only" or "any combination of A, B, and C". Furthermore, "at least one of A, B, or C" or "at least one of A, B, and / or C" may mean "at least one of A, B, and C".

[0039] Additionally, the brackets used in this disclosure may mean "for example". Specifically, when indicated as "Control Message (PDCCH)", this may mean that "PDCCH" is cited as an example of "Control Message". In other words, "Control Message" in this disclosure is not limited to "PDCCH", and "PDDCH" may be cited as an example of "Control Message". Specifically, when indicated as "Control Message (i.e., PDCCH)", this may also mean that "PDCCH" is cited as an example of "Control Message".

[0040] The technical features described in one of the accompanying drawings of this disclosure may be implemented individually or simultaneously.

[0041] The technologies described below can be used in various wireless communication systems such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA). CDMA can be implemented using radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA-2000. TDMA can be implemented using radio technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate GSM Evolution (EDGE). OFDMA can be implemented using radio technologies such as 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 IEEE 802.16e-based systems. UTRA is part of the Universal Mobile Telecommunications System (UMTS). The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of the Evolved UMTS (E-UMTS) using E-UTRA. 3GPP LTE uses OFDMA in the downlink and SC-FDMA in the uplink. LTE-Advanced (LTE-A) is an evolution of LTE.

[0042] 5G NR is the successor technology to LTE-A, which is a new type of mobile communication system with high performance, low latency, and high availability. 5G NR can use all available spectrum resources, including low-frequency bands below 1 GHz, mid-frequency bands from 1 GHz to 10 GHz, and high-frequency bands above 24 GHz (millimeter waves).

[0043] For clarity, the following description will focus primarily on LTE-A or 5G NR. However, the technical features of embodiments according to this disclosure are not limited thereto.

[0044] Figure 2 The structure of an NR system according to an embodiment of this disclosure is shown. Figure 2 The implementation methods can be combined with various implementation methods of this disclosure.

[0045] Reference Figure 2The Next Generation Radio Access Network (NG-RAN) may include a BS 20 that provides user plane and control plane protocol termination to UE 10. For example, BS 20 may include a Next Generation Node B (gNB) and / or an Evolved Node B (eNB). For example, UE 10 may be fixed or mobile and may be referred to by other terms such as Mobile Station (MS), User Terminal (UT), Subscriber Station (SS), Mobile Terminal (MT), Radio Device, etc. For example, BS may be referred to as a fixed station communicating with UE 10 and may be referred to by other terms such as Basic Transceiver System (BTS), Access Point (AP), etc.

[0046] Figure 2 The implementation example illustrates the case involving only the gNB. BS 20 can interconnect via the Xn interface. BS 20 can interconnect via the fifth-generation (5G) core network (5GC) and the NG interface. More specifically, BS 20 can connect to the Access and Mobility Management Function (AMF) 30 via the NG-C interface and can connect to the User Plane Function (UPF) 30 via the NG-U interface.

[0047] The radio interface protocol layer between the UE and the network can be classified into Layer 1 (L1), Layer 2 (L2), and Layer 3 (L3) based on the well-known Open Systems Interconnection (OSI) model in communication systems. The Physical (PHY) layer, belonging to Layer 1, provides information transmission services using physical channels, while the Radio Resource Control (RRC) layer, located in Layer 3, controls the radio resources between the UE and the network. For this purpose, the RRC layer exchanges RRC messages between the UE and the BS layer.

[0048] Figure 3 A radio protocol architecture based on an embodiment of this disclosure is shown. Figure 3 The implementation methods can be combined with various implementation methods of this disclosure. Specifically, Figure 3 (a) shows the radio protocol stack for the user plane used for Uu communication, and Figure 3 (b) shows the radio protocol stack for the control plane used for Uu communication. Figure 3 (c) shows the radio protocol stack for the user plane used for SL communication, and Figure 3 (d) in the diagram shows the radio protocol stack for the control plane used for SL communication.

[0049] Reference Figure 3The physical layer provides information transmission services to the upper layers through physical channels. The physical layer connects to the Media Access Control (MAC) layer, which is the upper layer, via transport channels. Data is transmitted between the MAC layer and the physical layer via transport channels. Transport channels are classified according to how data is transmitted through the radio interface and what characteristics of the data are transmitted.

[0050] Data is transmitted between different physical layers (i.e., the PHY layer of the transmitter and the PHY layer of the receiver) via a physical channel. The physical channel can be modulated using an orthogonal frequency division multiplexing (OFDM) scheme, and the physical channel uses time and frequency as radio resources.

[0051] The MAC layer provides services to the Radio Link Control (RLC) layer, which is higher than the MAC layer, via logical channels. The MAC layer provides the ability to map multiple logical channels to multiple transport channels. The MAC layer also provides logical channel multiplexing by mapping multiple logical channels to a single transport channel. The MAC layer provides data transmission services through logical channels.

[0052] The RLC layer performs concatenation, segmentation, and reassembly of Radio Link Control Service Data Units (RLC SDUs). To ensure the different Quality of Service (QoS) required by the Radio Bearer (RB), the RLC layer provides three types of operating modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provides error correction through Automatic Repeat Request (ARQ).

[0053] The Radio Resource Control (RRC) layer is defined only in the control plane. The RRC layer is used to control the configuration, reconfiguration, and release of logical, transport, and physical channels associated with RBs. RBs are logical paths for data transmission between the UE and the network, provided by Layer 1 (i.e., the Physical Layer or PHY Layer) and Layer 2 (i.e., the MAC Layer, RLC Layer, Packet Data Convergence Protocol (PDCP) Layer, and Serving Data Adaptation Protocol (SDAP) Layer).

[0054] The Packet Data Convergence Protocol (PDCP) in the user plane performs functions including user data transmission, header compression, and encryption. The Packet Data Convergence Protocol (PDCP) in the control plane performs functions including control plane data transmission and encryption / integrity protection.

[0055] The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. The SDAP layer performs the mapping between Quality of Service (QoS) streams and Data Radio Bearers (DRBs), as well as the QoS Stream ID (QFI) tagging in both DL and UL packets.

[0056] RB configuration refers to the processing used to specify radio protocol layers and channel attributes to provide specific services, as well as to determine the corresponding detailed parameters and operating methods. RBs can be classified into two types: Signaling Radio Bearers (SRBs) and Data Radio Bearers (DRBs). SRBs are used as paths for transmitting RRC messages in the control plane, while DRBs are used as paths for transmitting user data in the user plane.

[0057] When an RRC connection is established between the UE's RRC layer and the E-UTRAN's RRC layer, the UE is in the RRC connected (RRC_CONNECTED) state; otherwise, the UE can be in the RRC idle (RRC_IDLE) state. In the NR case, an additional RRC inactive (RRC_INACTIVE) state is defined, and a UE in the RRC_INACTIVE state can maintain its connection with the core network while releasing its connection with the BS.

[0058] The downlink transport channels for sending (or transmitting) data from the network to the UE include the Broadcast Channel (BCH) for transmitting system information and the Shared Downlink Channel (SCH) for transmitting other user service or control messages. Service or control messages for downlink multicast or broadcast services can be sent via the downlink SCH or via a separate downlink multicast channel (MCH). Furthermore, the uplink transport channels for sending (or transmitting) data from the UE to the network include the Random Access Channel (RACH) for transmitting initial control messages and the Shared Uplink Channel (SCH) for transmitting other user service or control messages.

[0059] Examples of logical channels that belong to a higher layer than the transport channel and are mapped to the transport channel may include the Broadcast Control Channel (BCCH), Paging Control Channel (PCCH), Common Control Channel (CCCH), Multicast Control Channel (MCCH), Multicast Service Channel (MTCH), etc.

[0060] Figure 4 The structure of an NR radio frame according to an embodiment of the present disclosure is shown. Figure 4 The implementation methods can be combined with various implementation methods of this disclosure.

[0061] Reference Figure 4 In NR, radio frames can be used to perform uplink and downlink transmissions. A radio frame is 10 ms long and can be defined as consisting of two half-frames (HF). A half-frame can include five 1 ms subframes (SF). A subframe (SF) can be divided into one or more time slots, and the number of time slots within a subframe can be determined according to the subcarrier spacing (SCS). Each time slot can include 12 or 14 OFDM(A) symbols depending on the cyclic prefix (CP).

[0062] With normal CP, each time slot can include 14 symbols. With extended CP, each time slot can include 12 symbols. In this paper, symbols can include OFDM symbols (or CP-OFDM symbols) and single-carrier-FDMA (SC-FDMA) symbols (or Discrete Fourier Transform Extended OFDM (DFT-s-OFDM) symbols).

[0063] Table 1 below shows the number of time slots (N) per symbol based on the SCS setting (μ) under normal CP conditions. slot symb ), Number of time slots per frame (N) frame,μ slot ) and the number of time slots per subframe (N) subframe,μ slot ).

[0064] [Table 1]

[0065] <![CDATA[SCS(15*2 μ )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,μ slot ]]> <![CDATA[N subframe,μ slot ]]> 15kHz (μ=0) 14 10 1 30kHz (μ=1) 14 20 2 60kHz (μ=2) 14 40 4 120kHz (μ=3) 14 80 8 240kHz (μ=4) 14 160 16

[0066] Table 2 shows examples of the number of symbols per slot, the number of slots per frame, and the number of slots per subframe, based on SCS, when using extended CP.

[0067] [Table 2]

[0068] <![CDATA[SCS(15*2 μ )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,μ slot ]]> <![CDATA[N subframe,μ slot ]]> 60kHz (μ=2) 12 40 4

[0069] In NR systems, the OFDM(A) parameter sets (e.g., SCS, CP length, etc.) of multiple cells integrated into a UE can be configured differently. Therefore, the (absolute time) duration (or interval) of time resources (e.g., subframes, slots, or TTIs) consisting of the same number of symbols (collectively referred to as time units (TUs) for simplicity) can be configured differently in the integrated cells.

[0070] In NR, multiple parameter sets or SCSs can be supported to support various 5G services. For example, with an SCS of 15kHz, a wide range of traditional cellular bands can be supported, while with an SCS of 30kHz / 60kHz, dense urban areas, lower latency, and wider carrier bandwidth can be supported. With an SCS of 60kHz or higher, bandwidths greater than 24.25GHz can be used to overcome phase noise.

[0071] NR bands can be defined as two different types of frequency ranges. These two different types of frequency ranges can be FR1 and FR2. The values ​​of the frequency ranges can be changed (or varied), for example, the two different types of frequency ranges can be as shown in Table 3 below. In the frequency ranges used in NR systems, FR1 can mean "the range below 6 GHz," and FR2 can mean "the range above 6 GHz," and can also be referred to as millimeter wave (mmW).

[0072] [Table 3]

[0073] Frequency range specification Corresponding frequency range Subcarrier spacing (SCS) FR1 450MHz–6000MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0074] As mentioned above, the frequency range value in an NR system can be changed (or varied). For example, as shown in Table 4 below, FR1 can include a bandwidth ranging from 410 MHz to 7125 MHz. More specifically, FR1 can include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher. For example, the frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher included in FR1 can include unlicensed bands. Unlicensed bands can be used for various purposes; for example, unlicensed bands can be used for vehicle-specific communications (e.g., autonomous driving).

[0075] [Table 4]

[0076] Frequency range specification Corresponding frequency range Subcarrier spacing (SCS) FR1 410MHz–7125MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0077] Figure 5 The structure of a time slot for an NR frame according to an embodiment of this disclosure is shown. Figure 5 The implementation methods can be combined with various implementation methods of this disclosure.

[0078] Reference Figure 5 A time slot comprises multiple symbols in the time domain. For example, in normal CP, a time slot may include 14 symbols. In extended CP, a time slot may include 12 symbols. Alternatively, in normal CP, a time slot may include 7 symbols. However, in extended CP, a time slot may include 6 symbols.

[0079] A carrier comprises multiple subcarriers in the frequency domain. A resource block (RB) can be defined as multiple consecutive subcarriers in the frequency domain (e.g., 12 subcarriers). A bandwidth portion (BWP) can be defined as multiple consecutive (physical) resource blocks ((P)RBs) in the frequency domain, and a BWP can correspond to a set of parameters (e.g., SCS, CP length, etc.). A carrier can include up to N BWPs (e.g., 5 BWPs). Data communication can be performed via active BWPs. Each element can be referred to as a resource element (RE) in the resource grid, and a complex symbol can be mapped to each element.

[0080] The bandwidth portion (BWP) and carrier will be described in detail below.

[0081] A BWP can be a contiguous set of Physical Resource Blocks (PRBs) within a given set of parameters. A PRB can be a contiguous set of Common Resource Blocks (CRBs) for a given set of parameters on a given carrier.

[0082] For example, a BWP can be at least one of an active BWP, an initial BWP, and / or a default BWP. For example, a UE may not monitor downlink radio link quality in DL BWPs other than the active DL BWP on the primary cell (PCell). For example, a UE may not receive PDCCH, Physical Downlink Shared Channel (PDSCH), or Channel State Information-Reference Signal (CSI-RS) (excluding RRM) other than the active DL BWP. For example, a UE may not trigger Channel State Information (CSI) reports for inactive DL BWPs. For example, a UE may not transmit Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH) other than the active UL BWP. For example, in the downlink case, the initial BWP can be given as a continuous set of RBs (configured by the Physical Broadcast Channel (PBCH)) for the Remaining Minimal System Information (RMSI) Control Resource Set (CORESET). For example, in the uplink case, the initial BWP can be given by the System Information Block (SIB) for the random access procedure. For example, a default BWP can be configured by a higher layer. For example, the initial value of the default BWP can be the initial DL BWP. To save energy, if the UE cannot detect downlink control information (DCI) during a specified period, the UE can switch its active BWP to the default BWP.

[0083] Furthermore, a BWP can be defined for an SL. The same SL BWP can be used for both transmission and reception. For example, a transmitting UE can transmit an SL channel or SL signal on a specific BWP, and a receiving UE can receive an SL channel or SL signal on a specific BWP. In a licensed carrier, the SL BWP can be defined separately from the Uu BWP, and the SL BWP can have separate configuration signaling from the Uu BWP. For example, a UE can receive configuration for an SL BWP from the BS / network. For example, a UE can receive configuration for a Uu BWP from the BS / network. SLBWPs are (pre-)configured on the carrier for NR V2X UEs outside coverage and RRC_IDLE UEs. For UEs in RRC_CONNECTED mode, at least one SL BWP can be activated on the carrier.

[0084] Figure 6 An example of a BWP according to an embodiment of this disclosure is shown. Figure 6 The implementation methods can be combined with various implementation methods of this disclosure. It is assumed that in... Figure 6 In this implementation, the number of BWPs is 3.

[0085] Reference Figure 6 A common resource block (CRB) can be a carrier resource block numbered from one end of a carrier frequency band to the other. Alternatively, a PRB can be a resource block numbered within each BWP. Point A can indicate a common reference point for the resource block grid.

[0086] It can be determined by point A and the offset (N) relative to point A. start BWP ) and bandwidth (N size BWP The BWP can be configured using a parameter set. For example, point A can be an external reference point of the PRB of a carrier, with subcarrier 0 of all parameter sets (e.g., all parameter sets supported by the network on the corresponding carrier) aligned at point A. For example, the offset can be the PRB distance between the lowest subcarrier in a given parameter set and point A. For example, the bandwidth can be the number of PRBs in a given parameter set.

[0087] The following text will describe V2X or SL communication.

[0088] Sidelink synchronization signals (SLSS) can include a primary sidelink synchronization signal (PSSS) and a secondary sidelink synchronization signal (SSSS) as SL-specific sequences. The PSSS can be referred to as the primary sidelink synchronization signal (S-PSS), and the SSSS can be referred to as the secondary sidelink synchronization signal (S-SSS). For example, a 127-character M-sequence can be used for the S-PSS, and a 127-character Gold sequence can be used for the S-SSS. For example, a UE can use the S-PSS for initial signal detection and synchronization acquisition. For example, a UE can use both the S-PSS and S-SSS for detailed synchronization acquisition and for detecting the synchronization signal ID.

[0089] The Physical Sidelink Broadcast Channel (PSBCH) can be a (broadcast) channel used to transmit default (system) information that the UE must know before SL signal transmission / reception. For example, the default information could be related to SLSS, duplex mode (DM), Time Division Duplex (TDD) uplink / downlink (UL / DL) configuration, resource pool information, and application types related to SLSS, subframe offset, and broadcast information. For instance, to evaluate PSBCH performance in NR V2X, the PSBCH payload size can be 56 bits, including 24 bits of Cyclic Redundancy Check (CRC).

[0090] S-PSS, S-SSS, and PSBCH can be included in a block format that supports periodic transmission (e.g., SL synchronization signal (SS) / PSBCH block, hereinafter, sidelink synchronization signal block (S-SSB)). The S-SSB can have the same parameter set (i.e., SCS and CP lengths) as the Physical Sidelink Control Channel (PSCCH) / Physical Sidelink Shared Channel (PSSCH) in the carrier, and the transmission bandwidth can exist within a (pre-)configured sidelink (SL) BWP. For example, the S-SSB can have a bandwidth of 11 resource blocks (SBs). For example, the PSBCH can exist across 11 RBs. Additionally, the frequency location of the S-SSB can be (pre-)configured. Therefore, the UE does not need to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0091] Figure 7 A UE performing V2X or SL communication according to an embodiment of this disclosure is shown. Figure 7 The implementation methods can be combined with various implementation methods of this disclosure.

[0092] Reference Figure 7In V2X or SL communication, the term "UE" can generally refer to a user's UE. However, if a network device such as a BS transmits / receives signals according to a communication scheme between UEs, then the BS can also be considered a UE. For example, UE 1 could be a first device 100, and UE 2 could be a second device 200.

[0093] For example, UE 1 can select a resource element corresponding to a specific resource from a resource pool that represents a set of resource families. Additionally, UE 1 can transmit SL signals using resource elements. For instance, the resource pool in which UE 1 can transmit signals can be configured for UE 2, acting as a receiving UE, and UE 1's signals can be detected within that resource pool.

[0094] In this document, if UE 1 is within the connection range of the BS, the BS can inform UE 1 of the resource pool. Otherwise, if UE 1 is outside the connection range of the BS, another UE can inform UE 1 of the resource pool, or UE 1 can use a pre-configured resource pool.

[0095] Typically, resource pools can be configured in units of multiple resources, and each UE can select one or more units of resources to use in its SL signal transmission.

[0096] The following section describes resource allocation in SL.

[0097] Figure 8 The process of a UE performing V2X or SL communication based on a transmission mode according to an embodiment of this disclosure is illustrated. Figure 8 The implementation methods can be combined with various implementation methods of this disclosure. In various implementation methods of this disclosure, the transmission mode can be referred to as a mode or resource allocation mode. Hereinafter, for ease of explanation, in LTE, the transmission mode can be referred to as the LTE transmission mode. In NR, the transmission mode can be referred to as the NR resource allocation mode.

[0098] For example, Figure 8 (a) illustrates UE operation associated with LTE transmission mode 1 or LTE transmission mode 3. Alternatively, for example, Figure 8 (a) illustrates UE operations associated with NR resource allocation mode 1. For example, LTE transmission mode 1 can be applied to regular SL communication, and LTE transmission mode 3 can be applied to V2X communication.

[0099] For example, Figure 8 (b) illustrates UE operation associated with LTE transmission mode 2 or LTE transmission mode 4. Alternatively, for example, Figure 8 (b) shows the UE operation associated with NR resource allocation mode 2.

[0100] Reference Figure 8 In (a) of this document, in LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, the BS can schedule SL resources for the UE to use for SL transmission. For example, the BS can perform resource scheduling for UE 1 via PDCCH (e.g., Downlink Control Information (DCI)) or RRC signaling (e.g., Configuration License Type 1 or Configuration License Type 2), and UE 1 can perform V2X or SL communication against UE 2 based on the resource scheduling. For example, UE 1 can send Sidelink Control Information (SCI) to UE 2 via the Physical Sidelink Control Channel (PSCCH), and subsequently send SCI-based data to UE 2 via the Physical Sidelink Shared Channel (PSSCH).

[0101] Reference Figure 8 In (b) of this document, under LTE transmission mode 2, LTE transmission mode 4, or NR resource allocation mode 2, the UE can determine the SL transmission resource within the SL resources configured by the BS / network or the pre-configured SL resources. For example, the configured or pre-configured SL resources can be a resource pool. For example, the UE can autonomously select or schedule resources for SL transmission. For example, the UE can perform SL communication by autonomously selecting resources from the configured resource pool. For example, the UE can autonomously select resources within a selection window by performing a sensing and resource (re)selection process. For example, sensing can be performed on a sub-channel basis. Furthermore, UE 1, which has autonomously selected resources from the resource pool, can send SCI to UE 2 via PSCCH, and subsequently send SCI-based data to UE 2 via PSSCH.

[0102] Figure 9 Three broadcast types according to embodiments of this disclosure are shown. Figure 9 The implementation methods can be combined with various implementation methods of this disclosure. Specifically, Figure 9 (a) in the diagram illustrates broadcast SL communication. Figure 9 (b) shows unicast SL communication, and Figure 9 (c) illustrates multicast SL communication. In the case of unicast SL communication, a UE can perform one-to-one communication with another UE. In the case of multicast SL transmission, a UE can perform SL communication with one or more UEs in a group to which it belongs. In various embodiments of this disclosure, SL multicast communication can be replaced by SL multicast communication, SL one-to-many communication, etc.

[0103] Furthermore, in this disclosure, for example, the transmitting UE (TX UE) may be a UE that transmits data to the (target) receiving UE (RX UE). For example, the TX UE may be a UE that performs PSCCH transmission and / or PSSCH transmission. Alternatively, for example, the TX UE may be a UE that transmits SL CSI-RS and / or SL CSI report request indicators to the (target) RX UE. Alternatively, for example, the TX UE may be a UE that transmits reference signals (e.g., DM-RS, CSI-RS, etc.) on (control) channels (e.g., PSCCH, PSSCH, etc.) for the (target) RX UE's SL radio link monitoring (RLM) operation and / or SL radio link failure (RLF) operation.

[0104] In this disclosure, for example, the receiving UE (RX UE) may be a UE that sends SL HARQ feedback to the sending UE (TX UE) based on whether the decoding of data received from the TX UE was successful and / or whether the detection / decoding of the PSCCH (related to PSSCH scheduling) sent by the TX UE was successful. Alternatively, for example, the RX UE may be a UE that performs SL CSI transmission to the TX UE based on SL CSI-RS and / or SL CSI report request indicator received from the TX UE. Alternatively, for example, the RX UE may be a UE that sends SL (L1) reference signal received power (RSRP) measurements to the TX UE based on SL (L1) RSRP report request indicator and / or (predefined) reference signal measurements. Alternatively, for example, the RX UE may be a UE that sends data from the RX UE to the TX UE. Alternatively, for example, the RX UE may be a UE that performs SL RLM and / or SL RLF operations based on reference signals received from the TX UE on the (pre-configured) (control) channel and / or (control) channel.

[0105] Furthermore, in this disclosure, for example, when the RX UE sends SL HARQ feedback information for the PSSCH and / or PSCCH received from the TX UE, one or more of the following options may be considered. Here, for example, one or more of the following options may be applied with limitation only if the RX UE successfully decodes / detects the PSCCH that schedules the PSSCH.

[0106] (1) Multicast Option 1: A No Acknowledgment (NACK) message can only be sent to the TX UE if the RX UE fails to decode / receive the PSSCH received from the TX UE.

[0107] (2) Multicast Option 2: If the RX UE successfully decodes / receives the PSSCH received from the TX UE, it can send an ACK message to the TX UE, and if the RX UE fails to decode / receive the PSSCH, a NACK message can be sent to the TX UE.

[0108] Furthermore, in this disclosure, for example, the TX UE may send one or more of the following information to the RX UE via the SCI. In this document, for example, the TX UE may send one or more of the following information to the RX UE via a first SCI and / or a second SCI.

[0109] - PSSCH (and / or PSCCH) related resource allocation information (e.g., location / quantity of time / frequency resources, resource reservation information (e.g., time period)).

[0110] -SL CSI Report Request Indicator or SL(L1) Reference Signal Received Power (RSRP) (and / or SL(L1) Reference Signal Received Quality (RSRQ) and / or SL(L1) Reference Signal Strength Indicator (RSSI)) Report Request Indicator

[0111] -SL CSI send indicator (or SL(L1)RSRP (and / or SL(L1)RSRQ and / or SL(L1)RSSI) message send indicator) (on PSSCH)

[0112] Modulation and Compilation Scheme (MCS) Information

[0113] -TX power information

[0114] -L1 Destination ID information and / or L1 Source ID information

[0115] -SL HARQ process ID information

[0116] - New Data Indicator (NDI) information

[0117] -Redundant Version (RV) Information

[0118] - (Send service / packet related) QoS information (e.g., priority information)

[0119] - Information regarding the number of antenna ports used for (transmitting) SL CSI-RS or the SL CSI-RS transmit indicator.

[0120] - (Requesting the location (or distance range) information of the target RX UE or TX UE location information in response to its SL HARQ feedback)

[0121] - Reference signal (e.g., DM-RS, etc.) information related to the decoding (and / or channel estimation) of data transmitted via PSSCH. Examples include information related to the pattern of the (time-frequency) mapping resources of the DM-RS, rank information, antenna port index information, information about the number of antenna ports, etc.

[0122] Furthermore, in this disclosure, for example, since the TX UE can send an SCI, a first SCI, and / or a second SCI to the RX UE via the PSCCH, the PSCCH can be replaced / alternate using the SCI and / or the first SCI and / or the second SCI. Alternatively, the SCI can be replaced / alternate using the PSCCH and / or the first SCI and / or the second SCI. Alternatively, for example, since the TX UE can send a second SCI to the RX UE via the PSSCH, the PSSCH can be replaced / alternate using the second SCI.

[0123] Furthermore, in this disclosure, for example, if the SCI configuration fields are divided into two groups considering the (relatively) high SCI payload size, then the first SCI including the first SCI configuration field group can be referred to as the first SCI, and the second SCI including the second SCI configuration field group can be referred to as the second SCI. Additionally, for example, the first SCI can be transmitted to the receiving UE via PSCCH. Furthermore, for example, the second SCI can be transmitted to the receiving UE via (separate) PSCCH or can be carried and transmitted along with data via PSSCH.

[0124] Additionally, in this disclosure, for example, the terms “configured / configured” or “defined / predefined” can refer to (pre)configuration (for each resource pool) from the base station or network (via predefined signaling (e.g., SIB, MAC, RRC, etc.)).

[0125] Furthermore, in this disclosure, for example, since the RLF can be determined based on the out-of-synchronization (OOS) indicator or the out-of-synchronization (IS) indicator, the RLF can be replaced / substituted with the out-of-synchronization (OOS) indicator or the synchronization (IS) indicator.

[0126] Furthermore, in this disclosure, for example, RB can be replaced / replaced by subcarriers. Additionally, in this disclosure, for example, packets or traffic can be replaced / replaced at the transmission layer using TB or MAC PDU.

[0127] Furthermore, in this disclosure, CBG can be replaced / replaced by TB.

[0128] Additionally, in this disclosure, for example, the source ID can be replaced / altered using the destination ID.

[0129] Furthermore, in this disclosure, for example, the L1 ID can be replaced / replaced using the L2 ID. For example, the L1 ID can be an L1 source ID or an L1 destination ID. For example, the L2 ID can be an L2 source ID or an L2 destination ID.

[0130] Additionally, in this disclosure, for example, the operation of sending a UE to reserve / select / determine retransmission resources may include: sending an operation of sending a UE to reserve / select / determine potential retransmission resources whose actual use will be determined based on SL HARQ feedback information received from the receiving UE.

[0131] Furthermore, in this disclosure, a sub-selection window can be replaced / alternate with a selection window and / or a pre-configured set of resources within the selection window, or vice versa.

[0132] In this disclosure, SL MODE 1 can refer to a resource allocation method or communication method in which the base station directly schedules SL transmission resources for a TX UE through predefined signaling (e.g., DCI or RRC messages). For example, SL MODE 2 can refer to a resource allocation method or communication method in which the UE independently selects SL transmission resources from a resource pool pre-configured or configured by the base station or network. For example, a UE performing SL communication based on SL MODE 1 can be referred to as MODE1 UE or MODE 1TX UE, and a UE performing SL communication based on SL MODE 2 can be referred to as MODE 2 UE or MODE 2TX UE.

[0133] Furthermore, in this disclosure, for example, a Dynamic License (DG) can be replaced / replaced by a Configuration License (CG) and / or a Semi-Permanent Scheduling (SPS) license, or vice versa. For example, a DG can be replaced / replaced by a combination of CG and SPS licenses, or vice versa. For example, a CG can include at least one of Configuration License (CG) Type 1 and / or Configuration License (CG) Type 2. For example, in CG Type 1, the license can be provided by RRC signaling and can be stored as a configuration license. For example, in CG Type 2, the license can be provided by PDCCH and can be stored or deleted as a configuration license based on L1 signaling indicating whether the license is enabled or disabled.

[0134] Furthermore, in this disclosure, a channel can be replaced by a signal, or vice versa. For example, transmitting / receiving a channel may include transmitting / receiving a signal. Additionally, for example, playback can be replaced by at least one of unicast, multicast, and / or broadcast, or vice versa. For example, playback type can be replaced by at least one of unicast, multicast, and / or broadcast, or vice versa.

[0135] Furthermore, in this disclosure, resources can be replaced / alternated using time slots or symbols, or vice versa. For example, resources may include time slots and / or symbols.

[0136] Furthermore, in this disclosure, priorities can be replaced / substituted with at least one of Logical Channel Priority (LCP), delay, reliability, minimum required communication range, priority per packet (PPPP), sidelink radio bearer (SLRB), QoS profile, QoS parameters and / or requirements, or vice versa.

[0137] Additionally, in various embodiments of this disclosure, reserved resources and / or selected resources can be replaced / alternated with sidelink licenses (SLGRANT).

[0138] Furthermore, in various embodiments of this disclosure, the delay can be replaced / substituted with a packet delay budget (PDB).

[0139] Meanwhile, in various embodiments of this disclosure, the message used to trigger a report on sidelink channel state information / sidelink channel quality information (hereinafter referred to as SL_CSI information) can be replaced / replaced by receiving a sidelink channel state information reference signal (CSI-RS).

[0140] In this disclosure, blind retransmission can refer to the TX UE performing a retransmission without receiving SL HARQ feedback information from the RX UE. For example, SL HARQ feedback-based retransmission can refer to the TX UE determining whether to perform a retransmission based on the SL HARQ feedback information received from the RX UE. For example, if the TX UE receives NACK and / or DTX information from the RX UE, the TX UE can perform a retransmission to the RX UE.

[0141] Furthermore, in this disclosure, for example, for ease of description, the (physical) channel used when the RX UE sends at least one of the following information to the TX UE may be referred to as PSFCH.

[0142] -SL HARQ feedback, SL CSI, SL(L1)RSRP

[0143] Furthermore, in this disclosure, the Uu channel may include a UL channel and / or a DL channel. For example, the UL channel may include PUSCH, PUCCH, sounding reference signal (SRS), etc. For example, the DL channel may include PDCCH, PDSCH, PSS / SSS, etc. For example, the SL channel may include PSCCH, PSSCH, PSFCH, PSBCH, PSSS / SSSS, etc.

[0144] Furthermore, in this disclosure, sidelink information may include at least one of sidelink messages, sidelink packets, sidelink services, sidelink data, sidelink control information, and / or sidelink transport blocks (TBs). For example, sidelink information may be sent via PSSCH and / or PSCCH.

[0145] Meanwhile, in NR V2X communication or NR sidelink communication, the transmitting UE can reserve / select one or more transmission resources for sidelink transmission (e.g., initial transmission and / or retransmission), and the transmitting UE can send information about the location of one or more transmission resources to the receiving UE.

[0146] Meanwhile, when performing sidelink communication, the method by which the sending UE reserves or predetermines transmission resources for the receiving UE can be represented as follows.

[0147] For example, the transmitting UE can perform the reservation of transmission resources based on chains. Specifically, for example, if the transmitting UE reserves K transmission resources, the transmitting UE can send location information of fewer than K transmission resources to the receiving UE by sending an SCI to the receiving UE at any (or specific) transmission time or time resource. That is, for example, the SCI can include location information of fewer than K transmission resources. Alternatively, for example, if the transmitting UE reserves K transmission resources associated with a specific TB, the transmitting UE can send location information of fewer than K transmission resources to the receiving UE by sending an SCI to the receiving UE at any (or specific) transmission time or time resource. That is, the SCI can include location information of fewer than K transmission resources. In this case, for example, by signaling location information of fewer than K transmission resources to the receiving UE via only one SCI sent by the transmitting UE at any (or specific) transmission time or time resource, performance degradation due to excessive increase in the payload of the SCI can be prevented.

[0148] Figure 10 A method is shown based on an embodiment of the present disclosure in which a UE having reserved transmission resources notifies another UE of the transmission resources. Figure 10 The embodiments can be combined with various embodiments of this disclosure.

[0149] Specifically, for example, Figure 10 (a) illustrates a chain-based resource reservation method performed by the transmitting UE when the value K=4, by sending / signaling the location information of (maximum) 2 transmission resources to the receiving UE via a single SCI. For example, Figure 10 (b) illustrates a chain-based resource reservation method performed by the transmitting UE when the value K=4, by transmitting / signaling the location information of (maximum) 3 transmission resources to the receiving UE via an SCI. For example, refer to Figure 10 In (a) and (b), the transmitting UE can send / signal the location information of the fourth transmission-related resources to the receiving UE via the fourth (or last) transmission-related PSCCH. For example, refer to Figure 10 (a) The transmitting UE can send / signal the location information of the fourth transmission-related resource to the receiving UE not only through the fourth (or last) transmission-related PSCCH, but also through the third transmission-related resource location information. For example, refer to Figure 10 (b) The transmitting UE can send / signal the location information of the fourth transmission-related resource to the receiving UE via the fourth (or last) transmission-related PSCCH, and also send / signal the location information of the second and third transmission-related resources. In this case, for example, in Figure 10 In (a) and (b), if the transmitting UE can transmit / signal the location information of the fourth transmission-related resources to the receiving UE via the fourth (or last) transmission-related PSCCH, the transmitting UE can set or specify the field / bit of the location information of unused or remaining transmission resources to a pre-configured value (e.g., 0). For example, in Figure 10 In (a) and (b), if the transmitting UE can send / signal the location information of the fourth transmission-related resources to the receiving UE only via the fourth (or last) transmission-related PSCCH, the transmitting UE can set or specify the field / bit of the location information of the unused or remaining transmission resources as a pre-configured status / bit value indicating / representing the last transmission (among the 4 transmissions).

[0150] Furthermore, for example, the transmitting UE can perform the reservation of transmission resources on a block-by-block basis. Specifically, for example, if the transmitting UE reserves K transmission resources, the transmitting UE can send the location information of the K transmission resources to the receiving UE via an SCI sent to the receiving UE at any (or specific) transmission time or time resource. That is, the SCI can include the location information of the K transmission resources. For example, if the transmitting UE reserves K transmission resources associated with a specific TB, the transmitting UE can send the location information of the K transmission resources to the receiving UE via an SCI sent to the receiving UE at any (or specific) transmission time or time resource. That is, the SCI can include the location information of the K transmission resources. For example, Figure 10 (c) illustrates a block-based resource reservation method performed by the transmitting UE when the value K=4, by signaling the location information of four transmission resources to the receiving UE via an SCI.

[0151] Based on embodiments of this disclosure, when the transmitting UE performs SL mode 2 operation, and when the transmitting UE selects / reserves transmission resources within N time slots, the transmitting UE can divide the selection window, determined based on the remaining delay budget associated with the packet, into a pre-configured number. In this document, for example, the pre-configured number can be a value obtained by dividing the value of N by the maximum number of time resources that can be signaled by a single SCI. Alternatively, for example, when the transmitting UE selects / reserves transmission resources within N time slots, the transmitting UE can divide the selection window, determined based on the remaining delay budget associated with the packet, into pre-configured length units (e.g., the maximum time gap between transmission resources that can be signaled by a single SCI) (hereinafter, K_VAL). Then, for example, the transmitting UE selects “CEILING(N / K_VAL)(and / or FLOOR(N / K_VAL))” transmission resources within each of the 32 time slot windows (e.g., this can be interpreted as the maximum time gap between transmission resources that can be signaled by a single SCI). In this document, for example, when applying the above embodiments, it can be interpreted that it is not necessary to meet the condition that the selected / reserved transmission resources within the selection window of different divisions are located within a 32-slot window. Furthermore, for example, based on the above embodiments, the operation of selecting transmission resources within the selection window related to the remaining delay budget of the packet can be triggered multiple times. For example, based on the above embodiments, the operation of selecting transmission resources within the selection window related to the remaining delay budget of the packet can be triggered a pre-configured number of times, specifically for at least one of resource pool, service type, QoS requirements (e.g., latency, reliability), or resource pool congestion level.

[0152] Based on embodiments of this disclosure, among the sub-channels included in the resource pool, there may be sub-channels with different frequency magnitudes (hereinafter, UNNOR_SB) compared to other sub-channels. In this document, for example, when configuring / selecting transmission resources within N time slots, the associated TB size can be determined based on the frequency magnitudes of the transmission resources in a pre-configured order signaled via SCI. For example, the pre-configured order could be first or last. In this document, for example, all transmission resources within N time slots can be selected using the same number of sub-channels. Additionally, for example, the sum of the number of RBs associated with the K sub-channels included in the resource pool (hereinafter, POOL_RBNUM) can be less than the number of RBs included in the SL BWP (hereinafter, SYS_RBNUM). In this scenario, the decision to treat an RB with a value of "SYS_RBNUM-POOL_RBNUM" as an independent subchannel, or to include it as one of the existing K subchannels, can be based on whether the "SYS_RBNUM-POOL_RBNUM" value exceeds a pre-configured threshold and / or whether the "SYS_RBNUM-POOL_RBNUM" value is greater than or equal to the pre-configured number of PSCCH RBs. For example, if the "SYS_RBNUM-POOL_RBNUM" value is greater than the pre-configured threshold, the RB can be considered a single independent subchannel configured with "SYS_RBNUM-POOL_RBNUM" RBs. Conversely, if the "SYS_RBNUM-POOL_RBNUM" value is less than the pre-configured threshold, the RB can be included as one of the existing K subchannels (e.g., the frequency size of the subchannel additionally including "SYS_RBNUM-POOL_RBNUM" RBs becomes larger than that of the other subchannels). Alternatively, for example, if the value of "SYS_RBNUM-POOL_RBNUM" is greater than or equal to the number of pre-configured PSCCH RBs, then an RB can be considered a single independent sub-channel configured with "SYS_RBNUM-POOL_RBNUM" RBs. For example, if the value of "SYS_RBNUM-POOL_RBNUM" is less than the number of pre-configured PSCCH RBs, then an RB can be included as one of the existing K sub-channels.

[0153] Based on embodiments of this disclosure, if the reserved period for transmission resources is relatively short or shorter than a pre-configured threshold, transmission resources associated with a specific or previous period can be allowed to reside in another or the next period. For example, transmission resources may include retransmission resources. In this document, for example, if the above embodiments are applied, and if transmission resources associated with different periods overlap in the time and / or frequency domains, the UE can determine, based on its implementation, which transmission resource of which period to discard. Alternatively, for example, if transmission resources associated with different periods overlap in the time and / or frequency domains, the UE can determine, based on the priority of the transmission packets, which transmission resource of which period to discard, and the UE can discard the (period) resource associated with a packet transmission having (relatively) lower priority. Alternatively, for example, if transmission resources associated with different periods overlap in the time and / or frequency domains, the UE can discard (re)transmission resources associated with the previous period in the time domain. Alternatively, for example, if transmission resources associated with different periods overlap in the time and / or frequency domains, the UE can discard (re)transmission resources associated with the subsequent period in the time domain. Additionally, for example, among transmission resources associated with different overlapping time periods in the time and / or frequency domains, if unused transmission resources arise due to receiving ACK information via PSFCH, packet transmission may be permitted via another overlapping transmission resource. For example, among transmission resources associated with different overlapping time periods in the time and / or frequency domains, if unused transmission resources associated with packets of relatively high priority arise due to receiving ACK information via PSFCH, the UE may transmit the relevant packets via another overlapping transmission resource associated with packets of relatively low priority. Alternatively, for example, it may be configured such that transmission resources associated with a specific or previous time period are not allowed to be located in another or the next time period. Alternatively, for example, if transmission resources associated with a specific or previous time period are located in another or the next time period, the UE may use the corresponding transmission resources to transmit new packets associated with the other or the next time period. Additionally, for example, when performing a CR evaluation for FDM transmission resources associated with different overlapping time periods in the time and / or frequency domains, the UE may reflect the number of counted sub-channels in the CR evaluation, regardless of overlap. Alternatively, in this case, for example, the UE may reflect the number of sub-channels whose overlapping sub-channels are counted only once in the CR evaluation. Alternatively, in this case, for example, the UE may reflect the number of counted sub-channels in the CR assessment, in addition to the sub-channels associated with the discarded transmission resources. Alternatively, in this case, for example, the UE may include sub-channels associated with the discarded transmission resources and reflect the number of counted sub-channels in the CR assessment.

[0154] Based on embodiments of this disclosure, the positions of PSSCH DMRS symbols and / or SL CSI-RS mapping symbols can be determined by applying a pre-configured offset in the opposite direction to the data symbols in a pre-configured order of PSSCH. For example, the pre-configured order can be last. For example, the UE can transmit PSSCH DMRS symbols and / or SL CSI-RS mapping symbols at positions where a pre-configured offset in the opposite direction is applied to the data symbols in the pre-configured order of PSSCH. Alternatively, for example, candidate patterns for PSSCH DMRS symbols and / or SL CSI-RS mapping symbols can exist specifically for a resource pool. In this case, the candidate patterns for PSSCH DMRS symbols and / or SL CSI-RS mapping symbols that can ultimately be selected can be limited based on the number of symbols that can actually be used by the UE for PSSCH transmission. For example, the candidate patterns for PSSCH DMRS symbols and / or SL CSI-RS mapping symbols that can ultimately be selected can be implicitly limited based on the overhead of PSFCH resources, which depends on the number of symbols that can actually be used by the UE for PSSCH transmission.

[0155] Based on embodiments of this disclosure, when a UE performs a re-evaluation operation, transmission resources that have already been reselected / re-selected due to overlap of transmission resources of another UE (hereinafter, RSC_REV) can be configured to be used before signaling via SCI, where predetermined / pre-configured time relationships / limitations cannot be maintained, causing reselection to be triggered / executed together. For example, when a UE performs a re-evaluation operation, due to RSC_REV, transmission resources determined internally by the UE before signaling via SCI (located after the RSC_REV time) can be configured, where predetermined / pre-configured time relationships / limitations cannot be maintained (e.g., resource reselection of transmission resources not directly triggered by the re-evaluation operation), and / or transmission resources signaled via SCI can be configured to be triggered / executed together. For example, when a UE performs a re-evaluation operation, together with RSC_REV, the UE can reselect transmission resources before signaling via SCI, where predetermined / pre-configured time ranges are not maintained due to RSC_REV. For example, if no candidate transmission resources are available, where predetermined / pre-configured time relationships / constraints can be maintained, a reselection of all transmission resources with the relevant SL license can be triggered. Alternatively, for example, in the case of a UE performing a re-evaluation operation, a reselection of transmission resources determined before and / or notified via SCI signaling after the aforementioned RSC_REV can be triggered / executed. For example, the transmission resources determined before SCI signaling can be transmission resources determined internally by the UE. Alternatively, for example, in the case of a UE performing periodic resource reservation, resources associated with a period already notified via SCI can be configured to be excluded from the reselection targets based on re-evaluation. For example, in the case of a UE performing periodic resource reservation, resources associated with subsequent periods already notified via SCI can be configured to be excluded from the reselection targets based on re-evaluation. For example, reselection based on re-evaluation can be performed for resources within the same period. For example, if the UE reserves periodic resources and needs to reselect resources related to a time period already signaled via SCI based on reassessment, it can reselect all transmission resources with the relevant SL license. Similarly, if the UE reserves periodic resources and needs to reselect resources related to a subsequent time period already signaled via SCI based on reassessment, the UE can reselect all transmission resources with the SL license related to RSC_REV.

[0156] Based on embodiments of this disclosure, if a UE needs to reselect transmission resources at a specific time due to a preemption operation, all transmission resources signaled / scheduled at other times via the SCI transmission at the corresponding time can be configured to be reselected. For example, if a UE needs to reselect transmission resources that have already been signaled / scheduled via the SCI at a specific time due to a preemption operation, the UE can also reselect all transmission resources signaled / scheduled at other times via the SCI transmission at the corresponding time. Alternatively, for example, if a UE needs to reselect transmission resources at a specific time due to a preemption operation, transmission resources signaled / scheduled at other times via the SCI transmission at the corresponding time can be configured to be excluded from the reselection. For example, if a UE needs to reselect transmission resources that have already been signaled / scheduled via the SCI at a specific time due to a preemption operation, the UE may not reselect transmission resources signaled / scheduled at other times via the SCI transmission at the corresponding time.

[0157] Simultaneously, in sidelink communication, when the UE performs a re-evaluation, it can compare a threshold with the RSRP value associated with the sidelink resource to be re-evaluated. For example, if the RSRP value associated with the sidelink resource is greater than the threshold, the UE can exclude the sidelink resource from the candidate resources. In this paper, for example, the threshold can be a pre-configured value through a combination of priorities associated with the sending UE and / or priorities associated with the receiving UE. Then, for example, the UE's physical layer can report the re-evaluation of the sidelink resource to the UE's MAC layer.

[0158] Figure 11 The process of a transmitting UE re-selecting resources and performing sidelink communication with a receiving UE based on a resource re-evaluation, according to an embodiment of the present disclosure, is illustrated. Figure 12 An example of reselecting resources based on re-evaluated resources, based on embodiments of this disclosure, is shown. Figure 13 An example of reselecting a periodic resource based on a re-evaluated periodic resource, based on an embodiment of this disclosure, is shown. Figures 11 to 13 The embodiments can be combined with various embodiments of this disclosure.

[0159] refer to Figure 11 In step S1110, the transmitting UE may perform a resource re-evaluation on the transmission resources used for performing sidelink communication. For example, the transmission resources may be the first transmission resources.

[0160] In step S1120, the transmitting UE may reselect a transmission resource based on reassessment. For example, the transmitting UE may reselect a first transmission resource based on reassessment. For example, the transmitting UE may reselect a second transmission resource based on the reselection of the first transmission resource. For example, the second transmission resource may be a resource selected by the transmitting UE before reselecting the first transmission resource. For example, the second transmission resource may be a resource not reserved by the transmitting UE. For example, a resource not reserved by the transmitting UE may be a resource before the transmitting UE sends an SCI including information related to the reservation of the transmission resource. For example, the second transmission resource may be a resource before the transmitting UE sends an SCI including information related to the reservation of the second transmission resource.

[0161] Specifically, refer to Figure 12 For example, a second transmission resource may exceed a predetermined time range by reselecting a first transmission resource. For example, the reselected second transmission resource may be within a predetermined time range. For example, the predetermined time range may be the maximum time gap between transmission resources that can be signaled by a single SCI. For example, the maximum time gap between transmission resources that can be signaled by a single SCI may be 32 time slots. For example, the time gap between the reselected first transmission resource and the reselected second transmission resource may be a value within 32 time slots. For example, the transmitting UE may reselect a third transmission resource located after the first transmission resource. For example, the third transmission resource may be a resource before the transmitting UE transmits an SCI including information related to the reservation of the third transmission resource. For example, if the third transmission resource is a resource for which the transmitting UE transmits an SCI including information related to the reservation of the third transmission resource, the transmitting UE may exclude the third transmission resource from the resource reselection target based on reassessment.

[0162] For example, if there are no candidate transmission resources within a predetermined time range, all transmission resources allocated by the sidelink license associated with the first transmission resource can be reselected.

[0163] For example, by periodically reserving transmission resources by the transmitting UE, it is possible to avoid reselecting transmission resources associated with a second time period following the first time period. For example, the first time period may be a time period that includes the first transmission resources. The subsequent second time period may include resources in which the transmitting UE transmits an SCI containing information related to the reservation of transmission resources.

[0164] Alternatively, for example, based on the periodic reservation of transmission resources by the transmitting UE, the transmission resources in a second time period following the first time period can be reselected. For example, the first time period may include the first transmission resources. For example, the subsequent second time period may include resources in which the transmitting UE transmits an SCI including information related to the reservation of transmission resources. In this case, for example, all transmission resources allocated by the sidelink license associated with the first transmission resources can be reselected.

[0165] refer to Figure 13 If the transmitting UE performs a re-evaluation of the first transmission resource and the reselection of the first transmission resource is triggered, the transmitting UE can reselect the second transmission resource within the first time period. For example, if the transmitting UE performs a re-evaluation of the first transmission resource and the reselection of the first transmission resource is triggered, the transmitting UE may not reselect transmission resources for time periods other than the first time period. For example, if an SCI (Service Control Center) including information related to the reservation of transmission resources included in the second time period has been signaled, the transmitting UE can exclude transmission resources included in the second time period from the resource reselection target based on the re-evaluation. Alternatively, for example, if the transmitting UE needs to reselect transmission resources for time periods other than the first time period, the transmitting UE can reselect all transmission resources allocated through sidelink licenses associated with the first transmission.

[0166] In step S1130, the transmitting UE may send a PSCCH to the receiving UE based on the reselected resources. For example, the transmitting UE may send an SCI to the receiving UE via the PSCCH. For example, the SCI may include information related to the reservation of transmission resources. In step S1140, the transmitting UE may send a PSSCH related to the PSCCH to the receiving UE based on the reselected resources.

[0167] Additionally, for example, a reselection check procedure for transmission resources in the resource pool selected by the sidelink procedure can be triggered for the transmitting UE. In this case, for example, when the transmitting UE performs a reselection triggered by a reassessment indicated by the physical layer, the transmitting UE can reselect a pre-selected but unreserved resource. Furthermore, for example, when a reselection is triggered by a reassessment indicated by the physical layer, the operation of reselecting a pre-selected but unreserved resource can be implemented by the UE.

[0168] Figure 14 A method for performing resource reselection based on a re-evaluation of a first transmission resource is illustrated in an embodiment of the present disclosure. Figure 14 The embodiments can be combined with various embodiments of this disclosure.

[0169] refer to Figure 14In step S1410, the first device 100 may re-evaluate the first transmission resource used for performing sidelink communication. In step S1420, the first device 100 may reselect the first transmission resource based on the re-evaluation.

[0170] In step S1430, the first device 100 may reselect a second transmission resource based on the reselection of the first transmission resource. For example, the second transmission resource may be a resource selected by the first device 100 before the reselection of the first transmission resource. For example, the second transmission resource may be a resource not reserved by the first device 100. For example, the second transmission resource may be a resource before the first device 100 sends an SCI including information related to the reservation of the second transmission resource. For example, the second transmission resource may exceed a predetermined time range. For example, the reselected second transmission resource may be within a predetermined time range. For example, the predetermined time range may be the maximum time between transmission resources that can be indicated by a single SCI. For example, the maximum time interval between transmission resources that can be indicated by a single SCI may be 32 time slots. For example, based on the absence of candidate transmission resources within the predetermined time range, all transmission resources allocated by the sidelink license associated with the first transmission resource may be reselected.

[0171] For example, a third transmission resource located after the first transmission resource can be selected. For example, the third transmission resource may be a resource prior to the SCI, which includes information related to the reservation of the third transmission resource, sent by the first device 100.

[0172] For example, based on the periodic transmission resource reservation through the first device 100, it is not necessary to reselect transmission resources associated with a second time period following the first time period. For example, the first time period may include first transmission resources. For example, the second time period may include resources in which the first device 100 transmits SCIs including information related to the reservation of transmission resources.

[0173] For example, based on the periodic transmission resource reservation through the first device 100, transmission resources in a second time period following the first time period can be reselected. For example, the first time period may include the first transmission resources. For example, the second time period may include resources in which the first device 100 transmits an SCI including information related to the reservation of transmission resources. For example, all transmission resources allocated by the sidelink license associated with the first transmission resources can be reselected.

[0174] The proposed method can be applied to one or more devices based on various embodiments of this disclosure. First, the processor 102 of the first device 100 can re-evaluate a first transmission resource used for performing sidelink communication. Second, the processor 102 of the first device 100 can reselect the first transmission resource based on the re-evaluation. Third, the processor 102 of the first device 100 can reselect a second transmission resource based on the reselection of the first transmission resource.

[0175] Based on embodiments of this disclosure, a first device adapted to perform wireless communication can be provided. For example, the first device may include: one or more memories storing instructions; one or more transceivers; and one or more processors connected to the one or more memories and the one or more transceivers.

[0176] Based on embodiments of this disclosure, an apparatus adapted to control a first user equipment (UE) can be provided. For example, the apparatus may include: one or more processors; and one or more memories operatively connected to the processors and storing instructions. For example, the processors may execute instructions to: re-evaluate a first transmission resource for performing sidelink communication; reselect the first transmission resource based on the re-evaluation; and reselect a second transmission resource based on the reselection of the first transmission resource. For example, the second transmission resource may be a resource selected by the first UE prior to the reselection of the first transmission resource. For example, the second transmission resource may be a resource not reserved by the first UE.

[0177] Based on embodiments of this disclosure, a non-transitory computer-readable storage medium storing instructions can be provided. For example, when executed, the non-transitory computer-readable storage medium storing instructions can cause a first device to: re-evaluate a first transmission resource for performing sidelink communication; reselect the first transmission resource based on the re-evaluation; and reselect a second transmission resource based on the reselection of the first transmission resource. For example, the second transmission resource may be a resource selected by the first device prior to the reselection of the first transmission resource. For example, the second transmission resource may be a resource not reserved by the first device.

[0178] Figure 15 A method for a second device to perform sidelink communication with a first device is illustrated based on an embodiment of the present disclosure. Figure 15 The embodiments can be combined with various embodiments of this disclosure.

[0179] refer to Figure 15In step S1510, the second device 200 can perform sidelink communication with the first device 100 based on the reselected first transmission resource and the reselected second transmission resource. For example, the first transmission resource can be re-evaluated, and the first transmission resource can be reselected based on the re-evaluation. For example, the second transmission resource can be reselected based on the reselection of the first transmission resource. For example, the second transmission resource can be a resource selected by the first device before the reselection of the first transmission resource, and the second transmission resource can be a resource not reserved by the first device.

[0180] For example, the second transmission resource may be a resource prior to the SCI (Search Engine Query) sent by the first device 100, which includes information related to the reservation of the second transmission resource. For example, the second transmission resource may exceed a predetermined time range. For example, the reselected second transmission resource may be within the predetermined time range. For example, the predetermined time range may be the maximum time between transmission resources that can be indicated by a single SCI. For example, the maximum time interval between transmission resources that can be indicated by a single SCI may be 32 time slots. For example, based on the absence of candidate transmission resources within the predetermined time range, all transmission resources allocated by the sidelink license associated with the first transmission resource may be reselected.

[0181] For example, a third transmission resource located after the first transmission resource can be selected. For example, the third transmission resource may be a resource prior to the SCI, which includes information related to the reservation of the third transmission resource, sent by the first device 100.

[0182] For example, based on the periodic transmission resource reservation through the first device 100, it is not necessary to reselect transmission resources associated with a second time period following the first time period. For example, the first time period may include first transmission resources. For example, the second time period may include resources in which the first device 100 transmits SCIs including information related to the reservation of transmission resources.

[0183] For example, based on the periodic transmission resource reservation through the first device 100, transmission resources in a second time period following the first time period can be reselected. For example, the first time period may include the first transmission resources. For example, the second time period may include resources in which the first device 100 transmits an SCI including information related to the reservation of transmission resources. For example, all transmission resources allocated by the sidelink license associated with the first transmission resources can be reselected.

[0184] The proposed method can be applied to one or more devices based on various embodiments of this disclosure. For example, the processor 202 of the second device 200 can control the transceiver 206 to perform sidelink communication with the first device 100 based on a reselected first transmission resource and a reselected second transmission resource.

[0185] Based on embodiments of this disclosure, a second device adapted to perform wireless communication can be provided. For example, the second device may include: one or more memories storing instructions; one or more transceivers; and one or more processors connected to the one or more memories and the one or more transceivers. For example, the one or more processors may execute instructions to perform sidelink communication with the first device based on a reselected first transmission resource and a reselected second transmission resource. For example, the first transmission resource may be re-evaluated, and the first transmission resource may be reselected based on the re-evaluation. For example, the second transmission resource may be reselected based on the reselection of the first transmission resource. For example, the second transmission resource may be a resource selected by the first device before the reselection of the first transmission resource, and the second transmission resource may be a resource not reserved by the first device.

[0186] The various embodiments disclosed herein can be combined with each other.

[0187] Hereinafter, devices to which various embodiments of the present disclosure may be applied will be described.

[0188] The various descriptions, functions, processes, proposals, methods and / or operating procedures described in this document can be applied to, but are not limited to, various fields requiring wireless communication / connectivity between devices (e.g., 5G).

[0189] The following description will be given in more detail with reference to the accompanying drawings. In the following drawings / description, unless otherwise described, the same reference numerals may denote the same or corresponding hardware blocks, software blocks, or functional blocks.

[0190] Figure 16 A communication system (1) according to an embodiment of the present disclosure is shown.

[0191] Reference Figure 16The communication system (1) applying various embodiments of this disclosure includes wireless devices, base stations (BS), and networks. Hereinafter, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G New RAT (NR) or Long Term Evolution (LTE)) and may be referred to as a communication / radio / 5G device. Wireless devices may include, but are not limited to, robots (100a), vehicles (100b-1, 100b-2), extended reality (XR) devices (100c), handheld devices (100d), home appliances (100e), Internet of Things (IoT) devices (100f), and artificial intelligence (AI) devices / servers (400). For example, a vehicle may include a vehicle with wireless communication capabilities, an autonomous vehicle, and a vehicle capable of performing vehicle-to-vehicle communication. Hereinafter, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices can include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and can be implemented in the form of head-mounted displays (HMDs), head-up displays (HUDs) installed in vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Handheld devices can include smartphones, smart tablets, wearable devices (e.g., smartwatches or smart glasses) and computers (e.g., laptops). Home appliances can include TVs, refrigerators, and washing machines. IoT devices can include sensors and smart meters. For example, the BS and network can be implemented as wireless devices, and a particular wireless device (200a) can operate as a BS / network node relative to other wireless devices.

[0192] In addition to LTE, NR, and 6G, the wireless communication technologies implemented in the wireless devices 100a to 100f of this disclosure may also include narrowband Internet of Things (IoT) for low-power communication. In this case, for example, NB-IoT technology may be an example of low-power wide-area network (LPWAN) technology and may be implemented as a standard such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the names mentioned above. Alternatively or additionally, the wireless communication technologies implemented in the wireless devices 100a to 100f of this disclosure may perform communication based on LTE-M technology. In this case, as an example, LTE-M technology may be an example of LPWAN and may be referred to by various names including enhanced machine-type communication (eMTC). For example, LTE-M technology may be implemented as at least one of various standards such as 1) LTE Cat 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-bandwidth limited (non-BL), 5) LTE-MTC, 6) LTE machine-type communication, and / or 7) LTE M, and is not limited to the names mentioned above. Alternatively or concurrently, the wireless communication technologies implemented in the wireless devices 100a to 100f of this disclosure may include at least one of Bluetooth, Low Power Wide Area Network (LPWAN), and ZigBee, which takes into account low power communication, and are not limited to the aforementioned names. As an example, ZigBee technology may generate personal area networks (PANs) related to low / low power digital communication based on various standards including IEEE 802.15.4, and may be referred to by various names.

[0193] Wireless devices 100a to 100f can connect to network 300 via BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can connect to AI server 400 via network 300. Network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via BS 200 / network 300, wireless devices 100a to 100f can perform direct communication with each other (e.g., sidelink communication) without going through the BS / network. For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0194] Wireless communication / connections 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS 200 or BS200 / BS 200. Here, the wireless communication / connection can be established via various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay, access backhaul integration (IAB)). Wireless devices and BS / wireless devices can transmit / receive radio signals to / from each other via wireless communication / connections 150a and 150b. For example, wireless communication / connections 150a and 150b can transmit / receive signals via various physical channels. For this purpose, at least a portion of various configuration information configuration processes, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes for transmitting / receiving radio signals can be performed based on various proposals of this disclosure.

[0195] Figure 17 A wireless device according to an embodiment of the present disclosure is shown.

[0196] Reference Figure 17 The first wireless device (100) and the second wireless device (200) can transmit radio signals via various RATs (e.g., LTE and NR). In this document, {the first wireless device (100) and the second wireless device (200)} can correspond to... Figure 16 {Wireless Device (100x) and BS (200)} and / or {Wireless Device (100x) and Wireless Device (100x)}.

[0197] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may additionally include one or more transceivers 106 and / or one or more antennas 108. The processors 102 may control the memories 104 and / or the transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed herein. For example, the processors 102 may process information in the memories 104 to generate a first information / signal, and then transmit a radio signal including the first information / signal via the transceivers 106. The processors 102 may receive a radio signal including a second information / signal via the transceivers 106, and then store the information obtained by processing the second information / signal in the memories 104. The memories 104 may be connected to the processors 102 and may store various information relating to the operation of the processors 102. For example, one or more memories 104 may store software code including commands for performing part or all of the processing controlled by one or more processors 102, or for performing the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed herein. Here, one or more processors 102 and one or more memories 104 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). One or more transceivers 106 may be connected to one or more processors 102 and transmit and / or receive radio signals via one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. One or more transceivers 106 may be used interchangeably with one or more radio frequency (RF) units. In this disclosure, a wireless device may represent a communication modem / circuit / chip.

[0198] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may additionally include one or more transceivers 206 and / or one or more antennas 208. The processors 202 may control the memories 204 and / or the transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed herein. For example, the processors 202 may process information in the memories 204 to generate a third message / signal, and subsequently transmit a radio signal including the third message / signal via the transceivers 206. The processors 202 may receive a radio signal including a fourth message / signal via the transceivers 106, and then store the information obtained by processing the fourth message / signal in the memories 204. The memories 204 may be connected to the processors 202 and may store various information relating to the operation of the processors 202. For example, one or more memories 204 may store software code including commands for performing part or all of the processing controlled by one or more processors 202, or for performing the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document. Here, one or more processors 202 and one or more memories 204 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). One or more transceivers 206 may be connected to one or more processors 202 and transmit and / or receive radio signals via one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. One or more transceivers 206 may be used interchangeably with one or more RF units. In this disclosure, a wireless device may represent a communication modem / circuit / chip.

[0199] The hardware components of wireless devices 100 and 200 will now be described in more detail. One or more protocol layers may be implemented, but are not limited to, by one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in this document. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in this document, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive signals (e.g., baseband signals) from one or more transceivers 106 and 206 and acquire PDUs, SDUs, messages, control information, data, or information in accordance with the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document.

[0200] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field-programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be implemented using firmware or software, and such firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to perform the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204, thereby being driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be implemented using software or firmware in the form of code, commands, and / or command sets.

[0201] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and may store various types of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memories 104 and 204 may be composed of read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 may be located internally and / or externally to one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0202] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels mentioned in the methods and / or operating procedures of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operating procedures disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and may transmit and receive radio signals. For example, one or more processors 102 and 202 may perform control such that one or more transceivers 106 and 206 may transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may perform control such that one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operational procedures disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc., from RF band signals to baseband signals for processing using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert the processed user data, control information, radio signals / channels, etc., from baseband signals to RF band signals. For this purpose, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0203] Figure 18 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0204] Reference Figure 18 The signal processing circuit (1000) may include a scrambler (1010), a modulator (1020), a layer mapper (1030), a pre-encoder (1040), a resource mapper (1050), and a signal generator (1060). It can perform... Figure 18 The operation / functions, but not limited to Figure 17 The processors (102, 202) and / or transceivers (106, 206) can be used. Figure 17Implemented by processors (102, 202) and / or transceivers (106, 206) Figure 18 Hardware components. For example, it can be achieved through... Figure 17 The processors (102, 202) implement boxes 1010 to 1060. Alternatively, they can be implemented using... Figure 17 The processors (102, 202) implement boxes 1010 to 1050, and can be used to... Figure 17 The transceivers (106, 206) are used to implement the frame 1060.

[0205] Can be via Figure 18 The signal processing circuit (1000) converts codewords into radio signals. In this document, a codeword is a sequence of encoded bits for an information block. An information block may include a transport block (e.g., a UL-SCH transport block, a DL-SCH transport block). Radio signals can be transmitted via various physical channels (e.g., PUSCH and PDSCH).

[0206] Specifically, the codeword can be converted into a scrambled bit sequence by scrambler 1010. The scrambling sequence used for scrambling can be generated based on an initial value, which may include the ID information of the wireless device. The scrambled bit sequence can be modulated into a modulation symbol sequence by modulator 1020. The modulation scheme may include pi / 2-binary phase shift keying (pi / 2-BPSK), m-phase shift keying (m-PSK), and m-quadrature amplitude modulation (m-QAM). The complex modulation symbol sequence can be mapped to one or more transmission layers by layer mapper 1030. The modulation symbols of each transmission layer can be mapped (pre-coded) to one or more corresponding antenna ports by pre-encoder 1040. The output z of pre-encoder 1040 can be obtained by multiplying the output y of layer mapper 1030 by an N*M precoding matrix W. Here, N is the number of antenna ports, and M is the number of transmission layers. Pre-encoder 1040 can perform precoding after performing transform precoding (e.g., DFT) for the complex modulation symbols. Alternatively, the precoder 1040 can perform precoding without performing transform precoding.

[0207] Resource mapper 1050 maps modulation symbols for each antenna port to time-frequency resources. Time-frequency resources may include multiple symbols in the time domain (e.g., CP-OFDMA symbols and DFT-s-OFDMA symbols) and multiple subcarriers in the frequency domain. Signal generator 1060 can generate radio signals from the mapped modulation symbols, and the generated radio signals can be transmitted to other devices via each antenna. For this purpose, signal generator 1060 may include an inverse fast Fourier transform (IFFT) module, a cyclic prefix (CP) inserter, a digital-to-analog converter (DAC), and an up-converter.

[0208] Able to be with Figure 18 The signal processing procedures (1010-1060) are configured in the reverse manner for the signal processing procedures used to receive signals in a wireless device. For example, a wireless device (e.g., Figure 17 The receiver (e.g., 100, 200) can receive radio signals from the outside via the antenna port / transceiver. The received radio signals can be converted into baseband signals using a signal recovery unit. For this purpose, the signal recovery unit may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module. Next, the baseband signals can be recovered into codewords through a resource demapping process, a post-encoding process, a demodulation processor, and a descrambling process. The codewords can be recovered into the original information blocks through decoding. Therefore, the signal processing circuitry (not illustrated) used for receiving signals may include a signal recovery unit, a resource demapping unit, a post-encoder, a demodulator, a descrambler, and a decoder.

[0209] Figure 19 Another example of a wireless device according to an embodiment of this disclosure is shown. The wireless device can be implemented in various forms depending on the use case / service (see reference). Figure 16 ).

[0210] Reference Figure 19 Wireless devices (100, 200) can correspond to Figure 17 The wireless devices (100, 200) can be configured using various elements, components, units / parts and / or modules. For example, each of the wireless devices (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and additional components (140). The communication unit may include a communication circuit (112) and one or more transceivers (114). For example, the communication circuit (112) may include... Figure 17 One or more processors (102, 202) and / or one or more memories (104, 204). For example, transceiver (114) may include one or more transceivers. Figure 17The device comprises one or more transceivers (106, 206) and / or one or more antennas (108, 208). The control unit (120) is electrically connected to the communication unit (110), memory (130), and add-on components (140), and controls the overall operation of the wireless device. For example, the control unit (120) may control the electrical / mechanical operation of the wireless device based on programs / code / commands / information stored in the memory unit (130). The control unit (120) may transmit information stored in the memory unit (130) to an external source (e.g., another communication device) via the communication unit (110) through a wireless / wired interface, or store information received from an external source (e.g., another communication device) via the communication unit (110) through a wireless / wired interface in the memory unit (130).

[0211] The add-on component (140) can be configured in various ways depending on the type of wireless device. For example, the add-on component (140) may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device can be implemented in, but is not limited to, the following forms: robot ( Figure 16 100a), vehicles ( Figure 16 100b-1 and 100b-2), XR equipment ( Figure 16 100c), handheld devices ( Figure 16 100d), home appliances ( Figure 16 100e), IoT devices ( Figure 16 100f), digital broadcasting terminals, hologram devices, public safety equipment, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environmental devices, AI servers / devices ( Figure 16 400), BS ( Figure 16 (e.g., 200), network nodes, etc. Depending on the use case / service, wireless devices can be used in mobile or fixed locations.

[0212] exist Figure 19In the wireless devices (100, 200), all various elements, components, units / parts, and / or modules can be connected to each other via wired interfaces, or at least partially via communication unit (110). For example, in each of the wireless devices (100, 200), the control unit (120) and the communication unit (110) can be connected via a wired connection, and the control unit (120) and the first unit (e.g., 130, 140) can be wirelessly connected via the communication unit (110). Each element, component, unit / part, and / or module within the wireless devices (100, 200) may also include one or more elements. For example, the control unit (120) may be constructed using a collection of one or more processors. As an example, the control unit (120) may be constructed using a collection of communication control processors, application processors, electronic control units (ECUs), graphics processing units, and memory control processors. As another example, memory (130) can be constructed using random access memory (RAM), dynamic RAM (DRAM), read-only memory (ROM), flash memory, volatile memory, non-volatile memory and / or combinations thereof.

[0213] The implementation will be described in detail below with reference to the accompanying drawings. Figure 19 Examples.

[0214] Figure 20 A handheld device according to an embodiment of the present disclosure is illustrated. The handheld device may include a smartphone, smartpad, wearable device (e.g., a smartwatch or smart glasses), or portable computer (e.g., a laptop). The handheld device may be referred to as a mobile station (MS), user terminal (UT), mobile subscriber station (MSS), subscriber station (SS), advanced mobile station (AMS), or wireless terminal (WT).

[0215] Reference Figure 20 The handheld device (100) may include 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 I / O unit (140c). The antenna unit (108) may be configured as part of the communication unit (110). Boxes 110 to 130 / 140a to 140c correspond to respectively Figure 19 The frame is 110 to 130 / 140.

[0216] Communication unit 110 can send and receive signals (e.g., data signals and control signals) to and from other wireless devices or BSs. Control unit 120 can perform various operations by controlling the constituent elements of handheld device 100. Control unit 120 may include an application processor (AP). Memory unit 130 can store data / parameters / programs / codes / commands required to drive handheld device 100. Memory unit 130 can store input / output data / information. Power supply unit 140a can supply power to handheld device 100 and includes wired / wireless charging circuitry, batteries, etc. Interface unit 140b can support connection of handheld device 100 to other external devices. Interface unit 140b may include various ports for connecting to external devices (e.g., audio I / O ports and video I / O ports). I / O unit 140c can input or output user-input video information / signals, audio information / signals, data, and / or information. I / O unit 140c may include a camera, microphone, user input unit, display unit 140d, speaker, and / or haptic module.

[0217] For example, in the case of data communication, I / O unit 140c can acquire user input information / signals (e.g., touch, text, voice, image, or video), and the acquired information / signals can be stored in memory unit 130. Communication unit 110 can convert the information / signals stored in memory into radio signals and transmit the converted radio signals directly to other wireless devices or to the BS. Communication unit 110 can receive radio signals from other wireless devices or the BS, and then recover the received radio signals into the original information / signals. The recovered information / signals can be stored in memory unit 130 and can be output in various types (e.g., text, voice, image, video, or haptic feedback) through I / O unit 140.

[0218] Figure 21 A vehicle or autonomous vehicle according to an embodiment of this disclosure is shown. The vehicle or autonomous vehicle can be implemented by mobile robots, cars, trains, manned / unmanned aerial vehicles (AVs), ships, etc.

[0219] Reference Figure 21 The vehicle or autonomous vehicle (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a drive unit (140a), a power supply unit (140b), a sensor unit (140c), and an autonomous driving unit (140d). The antenna unit (108) may be configured as part of the communication unit (110). Boxes 110 / 130 / 140a to 140d correspond to respectively Figure 19 The frame size is 110 / 130 / 140.

[0220] Communication unit 110 can send and receive signals (e.g., data signals and control signals) to and from external devices such as other vehicles, BS (e.g., gNB and roadside units), and servers. Control unit 120 can perform various operations by controlling the components of the vehicle or autonomous vehicle 100. Control unit 120 may include electronic control unit (ECU). Drive unit 140a can cause the vehicle or autonomous vehicle 100 to move on the road. Drive unit 140a may include engine, motor, transmission system, wheels, brakes, steering equipment, etc. Power supply unit 140b can supply power to the vehicle or autonomous vehicle 100 and may include wired / wireless charging circuitry, batteries, etc. Sensor unit 140c can acquire vehicle status, external environment information, user information, etc. Sensor unit 140c may include inertial measurement unit (IMU) sensors, collision sensors, wheel sensors, speed sensors, slope sensors, weight sensors, heading sensors, position modules, vehicle forward / reverse sensors, battery sensors, fuel sensors, tire sensors, steering sensors, temperature sensors, humidity sensors, ultrasonic sensors, lighting sensors, pedal position sensors, etc. Autonomous driving unit 140d can implement technologies for maintaining the vehicle's lane, technologies for automatically adjusting speed (e.g., adaptive cruise control), technologies for autonomously driving along a defined path, and technologies for automatically setting a route when a destination is set, etc.

[0221] For example, communication unit 110 can receive map data, traffic information data, etc., from an external server. Autonomous driving unit 140d can generate autonomous driving paths and driving plans from the acquired data. Control unit 120 can control drive unit 140a, enabling the vehicle or autonomous vehicle 100 to move along the autonomous driving path according to the driving plan (e.g., speed / direction control). During autonomous driving, communication unit 110 can periodically or non-periodically acquire the latest traffic information data from an external server and acquire surrounding traffic information data from neighboring vehicles. During autonomous driving, sensor unit 140c can acquire vehicle status and / or surrounding environment information. Autonomous driving unit 140d can update the autonomous driving path and driving plan based on newly acquired data / information. Communication unit 110 can transmit information about vehicle location, autonomous driving path, and / or driving plan to an external server. The external server can predict traffic information data using AI technology, etc., based on information collected from the vehicle or autonomous vehicle, and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0222] The claims in this specification can be combined in various ways. For example, technical features in the method claims can be combined to implement or perform in an apparatus, and technical features in the apparatus claims can be combined to implement or perform in a method. Additionally, technical features in one or more method claims and one or more apparatus claims can be combined to implement or perform in a method.

Claims

1. A method for performing wireless communication by a first device, the method comprising: Send sidelink control information that includes resource allocation information and resource reservation time period information; A reassessment is performed on the first transport resource used for sidelink communication; The first transmission resource is reselected based on the reassessment. as well as The second transmission resource is selected based on the reselection of the first transmission resource. The second transmission resource is the resource selected by the first device before the first transmission resource is reselected. Wherein, the second transmission resource is a resource not reserved by the first device, and The reassessment is not applied to third transmission resources in only one subsequent period that has already been signaled via the side link control information.

2. The method of claim 1, wherein, The second transmission resource is a resource that has not yet been signaled by the side link control information.

3. The method of claim 1, wherein, The second transmission resource has exceeded the predetermined time range.

4. The method of claim 3, wherein, The second transmission resource, which was reselected, is located within the predetermined time range.

5. The method of claim 4, wherein, The predetermined time range is the maximum time gap between transmission resources that can be signaled by a side link control message.

6. The method of claim 5, wherein, The maximum time gap between transmission resources that can be signaled via the side link control information is 32 time slots.

7. The method of claim 3, wherein, If no candidate transmission resources are available within the predetermined time range, all transmission resources allocated through the sidelink license associated with the first transmission resource are reselected.

8. The method of claim 1, wherein, The third transmission resource in the subsequent time period is a periodic transmission resource reserved by the resource allocation information and resource reservation time period information included in the side link control information.

9. A first device adapted to perform wireless communication, the first device comprising: At least one transceiver; At least one processor; At least one memory, connected to the at least one processor and storing instructions, which, upon execution, cause the first device to perform an operation, the operation including: Send sidelink control information that includes resource allocation information and resource reservation time period information; A reassessment is performed on the first transport resource used for sidelink communication; Based on the reassessment, the first transmission resource is reselected; and Based on the reselection of the first transmission resource, a second transmission resource is reselected. The second transmission resource is the resource selected by the first device before the first transmission resource is reselected. Wherein, the second transmission resource is a resource not reserved by the first device, and The reassessment is not applied to third transmission resources in only one subsequent period that has already been signaled via the side link control information.

10. A processing apparatus adapted to control a first device, the processing apparatus comprising: At least one processor; as well as At least one memory, connected to the at least one processor and storing instructions, which, upon execution, cause the first device to perform an operation, the operation including: Send sidelink control information that includes resource allocation information and resource reservation time period information; A reassessment is performed on the first transport resource used for sidelink communication; Based on the reassessment, the first transmission resource is reselected; and Based on the reselection of the first transmission resource, a second transmission resource is reselected. The second transmission resource is the resource selected by the first device before the first transmission resource is reselected. Wherein, the second transmission resource is a resource not reserved by the first device, and The reassessment is not applied to third transmission resources in only one subsequent period that has already been signaled via the side link control information.

Images