Method and apparatus for requesting CSI in NR V2X

Abstract

A method for performing wireless communication by a first device and a device supporting the method are provided. The method may include the following steps: sending a second sidelink control information (SCI) and a first SCI for scheduling a physical sidelink shared channel (PSSCH) to a second device via a physical sidelink control channel (PSCCH); and sending a channel state information-reference signal (CSI-RS) and a second SCI including CSI request information indicating a request for a first channel state information CSI report to the second device via the PSSCH. During a duration associated with the first CSI report, the first device is not allowed to send CSI request information indicating a request for a second CSI report to the second device.

Description

Technical Field

[0001] The present disclosure relates to wireless communication systems. Background Art

[0002] Sidelink (SL) communication is a communication scheme in which a direct link is established between user equipments (UEs) and the UEs directly exchange voice and data with each other without intervention of an evolved Node B (eNB). SL communication is being considered as a solution to eNB overhead caused by the rapid growth of data traffic.

[0003] V2X (Vehicle to Everything) refers to the communication technology used by vehicles to exchange information with other vehicles, pedestrians, objects equipped with infrastructure, etc. V2X can be divided into four types such as 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.

[0004] In addition, as more and more communication devices require larger communication capacity, mobile broadband communication enhanced relative to traditional radio access technology (RAT) is required. Therefore, the design of communication systems taking into account UEs or services that are sensitive to reliability and latency has also been discussed, and the next generation radio access technology taking into account enhanced mobile broadband communication, massive MTC, and ultra-reliable low-latency communication (URLLC) can be referred to as a new RAT (radio access technology) or NR (new radio).

[0005] Figure 1 is a diagram for describing NR-based V2X communication compared with V2X communication based on a RAT used before NR. Figure 1 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0006] Regarding V2X communication, when discussing the RAT used before NR, the focus is on the scheme of providing safety services based on V2X messages such as BSM (Basic Safety Message), CAM (Cooperative Awareness Message) and DENM (Decentralized Environment Notification Message). V2X messages may include location information, dynamic information, attribute information, etc. For example, a UE may send a periodic message type CAM and / or an event-triggered message type DENM to another UE.

[0007] For example, CAM may include dynamic state information of the vehicle such as direction and speed, static data of the vehicle such as size, and basic vehicle information such as external lighting status, route details, etc. For example, UE may broadcast CAM, and the latency of CAM may be less than 100ms. For example, UE may generate DENM and send it to another UE in an unexpected situation such as vehicle failure, accident, etc. For example, all vehicles within the transmission range of UE can receive CAM and / or DENM. In this case, DENM may have a higher priority than CAM.

[0008] Since then, various V2X scenarios have been proposed in NR regarding V2X communication. For example, these various V2X scenarios may include vehicle platooning, advanced driving, extended sensors, remote driving, etc.

[0009] For example, based on vehicle platooning, vehicles can move together by dynamically forming groups. For example, in order to perform platooning operations based on vehicle formation, vehicles belonging to the group can receive periodic data from the leading vehicle. For example, vehicles belonging to the group can reduce or increase the interval between vehicles by using the periodic data.

[0010] For example, based on advanced driving, the vehicles can be semi-autonomous or fully autonomous. For example, each vehicle can adjust trajectory or maneuver based on data obtained from local sensors of nearby vehicles and / or nearby logical entities. In addition, for example, each vehicle can share driving intentions with nearby vehicles.

[0011] For example, based on the extended sensors, raw data, processed data or real-time video data obtained by local sensors can be exchanged between the vehicle, the logical entity, the pedestrian UE and / or the V2X application server, so that, for example, the vehicle can recognize a further improved environment compared to the environment detected using its own sensors.

[0012] For example, based on remote driving, for a person or remote vehicle that cannot drive in a dangerous environment, a remote driver or V2X application can operate or control the remote vehicle. For example, if the route is predictable (such as public transportation), cloud computing-based driving can be used for the operation or control of the remote vehicle. In addition, for example, access to a cloud-based backend service platform can be considered for remote driving.

[0013] In addition, schemes for specifying service requirements for various V2X scenarios such as vehicle platooning, advanced driving, extended sensors, remote driving, etc. are discussed in NR-based V2X communications. Summary of the invention

[0014] Technical issues

[0015] In addition, in SL communication, the first device can send a channel state information reference signal (CSI-RS) to the second device, and the second device can obtain channel state information (CSI) based on the CSI-RS and report it to the first device. In this case, it is necessary to configure the duration for which the first device is allowed to request a CSI report from the second device or the duration for which the first device is not allowed to request a CSI report from the second device.

[0016] Technical Solution

[0017] In one embodiment, a method for performing wireless communication by a first device is provided. The method may include the following steps: sending first sidelink control information (SCI) and second SCI for scheduling a physical sidelink shared channel (PSSCH) to a second device through a physical sidelink control channel (PSCCH); and sending the second SCI including CSI request information indicating a request for a first channel state information CSI report and a channel state information-reference signal CSI-RS to the second device through the PSSCH. The first device may not be allowed to send CSI request information indicating a request for a second CSI report to the second device within a duration associated with the first CSI report.

[0018] In one embodiment, a first device configured 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 the instructions to perform the following operations: send a first sidelink control information (SCI) and a second SCI for scheduling a physical sidelink shared channel (PSSCH) to a second device through a physical sidelink control channel (PSCCH); and send the second SCI and a channel state information-reference signal CSI-RS including CSI request information indicating a request for a first channel state information CSI report to the second device through the PSSCH. The first device may not be allowed to send CSI request information indicating a request for a second CSI report to the second device within a duration associated with the first CSI report.

[0019] Beneficial Effects

[0020] A user equipment (UE) may efficiently perform SL communication. An understanding / assumption of the UE's operation for requesting SL CSI information reporting may be described. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1is a diagram for describing NR-based V2X communication compared with V2X communication based on a RAT used before NR.

[0022] Figure 2 The structure of the NR system according to an embodiment of the present disclosure is shown.

[0023] Figure 3 The functional division between NG-RAN and 5GC according to an embodiment of the present disclosure is shown.

[0024] Figure 4 A radio protocol architecture according to an embodiment of the present disclosure is shown.

[0025] Figure 5 The structure of the NR system according to an embodiment of the present disclosure is shown.

[0026] Figure 6 The structure of the time slot of the NR frame according to an embodiment of the present disclosure is shown.

[0027] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown.

[0028] Figure 8 A radio protocol architecture for SL communication according to an embodiment of the present disclosure is shown.

[0029] Fig. 9 A UE performing V2X or SL communication according to an embodiment of the present disclosure is shown.

[0030] Fig.10 A process of performing V2X or SL communication by a UE based on a transmission mode according to an embodiment of the present disclosure is shown.

[0031] Fig.11 Three playback types according to an embodiment of the present disclosure are shown.

[0032] Fig.12 The resource unit used for CBR measurement according to the embodiment of the present disclosure is shown.

[0033] Fig.13 A method in which a UE having reserved transmission resources notifies another UE of the transmission resources according to an embodiment of the present disclosure is shown.

[0034] Fig.14 The process of a UE sending a CSI-RS and / or a CSI-IM based on an embodiment of the present disclosure is shown.

[0035] Fig.15 A process in which a UE performs SL communication based on CBR according to an embodiment of the present disclosure is shown.

[0036] Fig.16 A method for a first device to transmit an NZP CSI-RS and / or CSI-IM according to an embodiment of the present disclosure is shown.

[0037] Fig.17 A method for obtaining channel state information based on NZP CSI-RS and / or CSI-IM by a second device according to an embodiment of the present disclosure is shown.

[0038] Fig.18 A method for a first device to perform wireless communication based on an embodiment of the present disclosure is shown.

[0039] Fig.19 A method for a second device to perform wireless communication based on an embodiment of the present disclosure is shown.

[0040] Fig. 20 The process of UE reporting SL CSI based on an embodiment of the present disclosure is shown.

[0041] Fig.21 An example of SL CSI reporting MAC CE based on an embodiment of the present disclosure is shown.

[0042] Fig. 22 The process of a TX UE sending a CSI report request and a CSI-RS according to an embodiment of the present disclosure is shown.

[0043] Fig.23 The process of a TX UE sending a CSI report request and a CSI-RS according to an embodiment of the present disclosure is shown.

[0044] Fig.24 A method for a first device to perform wireless communication based on an embodiment of the present disclosure is shown.

[0045] Fig.25 A method for a second device to perform wireless communication based on an embodiment of the present disclosure is shown.

[0046] Fig.26 A communication system 1 according to an embodiment of the present disclosure is shown.

[0047] Fig. 27 A wireless device according to an embodiment of the present disclosure is shown.

[0048] Fig.28 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0049] Fig.29 Another example of a wireless device according to an embodiment of the present disclosure is shown.

[0050] Fig.30 A handheld device according to an embodiment of the present disclosure is shown.

[0051] Fig.31 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0052] In this specification, "A or B" may mean "only A", "only B", or "both A and B". In other words, in this specification, "A or B" may be interpreted as "A and / or B". For example, in this specification, "A, B or C" may mean "only A", "only B", "only C", or "any combination of A, B, C".

[0053] A slash ( / ) or a comma used in this specification may mean "and / or". For example, "A / B" may mean "A and / or B". Thus, "A / B" may mean "only A", "only B", or "both A and B". For example, "A, B, C" may mean "A, B, or C".

[0054] In the present specification, "at least one of A and B" may mean "only A", "only B", or "both A and B". In addition, in the present specification, the expression "at least one of A or B" or "at least one of A and / or B" may be interpreted as "at least one of A and B".

[0055] In addition, in the present specification, "at least one of A, B, and C" may mean "only A", "only B", "only C", or "any combination of A, B, and C". In addition, "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".

[0056] In addition, brackets used in this specification may mean "for example". Specifically, when indicated as "control information (PDCCH)", this may mean that "PDCCH" is proposed as an example of "control information". In other words, the "control information" of this specification is not limited to "PDCCH", and "PDDCH" may be proposed as an example of "control information". Specifically, when indicated as "control information (ie, PDCCH)", this may also mean that "PDCCH" is proposed as an example of "control information".

[0057] The technical features described in each of the drawings in this specification may be implemented separately or simultaneously.

[0058] The techniques 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), single carrier frequency division multiple access (SC-FDMA), etc. 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 Rates for GSM Evolution (EDGE). OFDMA can be implemented using radio technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA), etc. IEEE 802.16m is an evolved version of IEEE 802.16e and provides backward compatibility for systems based on IEEE 802.16e. UTRA is part of Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of 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.

[0059] 5G NR is a subsequent technology of LTE-A corresponding to a new mobile communication system with characteristics such as high performance, low latency, and high availability. 5G NR can use all available spectrum resources including low frequency bands less than 1 GHz, intermediate frequency bands from 1 GHz to 10 GHz, and high frequency bands above 24 GHz (millimeter waves).

[0060] For the sake of clarity, the following description will mainly focus on LTE-A or 5G NR. However, the technical features of the embodiments of the present disclosure will not be limited thereto.

[0061] Figure 2 The structure of the NR system according to an embodiment of the present disclosure is shown. Figure 2 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0062] Reference Figure 2, the next generation radio access network (NG-RAN) may include a BS 20 that provides user plane and control plane protocol terminations to the UE 10. For example, the BS 20 may include a next generation Node B (gNB) and / or an evolved Node B (eNB). For example, the UE 10 may be fixed or mobile and may be referred to as other terms such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), a wireless device, etc. For example, the BS may be referred to as a fixed station that communicates with the UE 10 and may be referred to as other terms such as a base transceiver system (BTS), an access point (AP), etc.

[0063] Figure 2 The embodiment of the present invention illustrates a case where only gNB is included. BS20 may be connected to each other via an Xn interface. BS20 may be connected to each other via a fifth generation (5G) core network (5GC) and an NG interface. More specifically, BS20 may be connected to an access and mobility management function (AMF) 30 via an NG-C interface, and may be connected to a user plane function (UPF) 30 via an NG-U interface.

[0064] Figure 3 The functional division between NG-RAN and 5GC according to an embodiment of the present disclosure is shown.

[0065] Reference Figure 3 , gNB can provide functions such as inter-cell radio resource management (inter-cell RRM), radio bearer (RB) control, connection mobility control, radio admission control, measurement configuration and provision, dynamic resource allocation, etc. AMF can provide functions such as non-access stratum (NAS) security, idle state mobility processing, etc. UPF can provide functions such as mobility anchoring, protocol data unit (PDU) processing, etc. Session management function (SMF) can provide functions such as user equipment (UE) Internet protocol (IP) address allocation, PDU session control, etc.

[0066] The radio interface protocol layer between the UE and the network can be classified into the first layer (L1), the second layer (L2), and the third layer (L3) based on the lower three layers of the open system interconnection (OSI) model known in the communication system. Here, the physical (PHY) layer belonging to the first layer provides an information transfer service using a physical channel, and the radio resource control (RRC) layer located at the third layer controls radio resources between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the BS layer.

[0067] Figure 4 A radio protocol architecture according to an embodiment of the present disclosure is shown. Figure 4The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 4 (a) shows the radio protocol architecture for the user plane, and Figure 4 (b) in FIG. 4 shows a radio protocol architecture for a control plane. The user plane corresponds to a protocol stack for user data transmission, and the control plane corresponds to a protocol stack for control signal transmission.

[0068] Reference Figure 4 , the physical layer provides information transfer services to the upper layer through the physical channel. The physical layer is connected to the medium access control (MAC) layer, which is the upper layer of the physical layer, through the transport channel. Data is transferred between the MAC layer and the physical layer through the transport channel. The transport channel is classified according to how the data is transmitted through the radio interface and what characteristics of the data it transmits.

[0069] Data is transmitted through a physical channel between different PHY layers (ie, a PHY layer of a transmitter and a PHY layer of a receiver). The physical channel may be modulated using an Orthogonal Frequency Division Multiplexing (OFDM) scheme, and uses time and frequency as radio resources.

[0070] The MAC layer provides services to the Radio Link Control (RLC) layer via logical channels, and the RLC layer is a higher layer of the MAC layer. The MAC layer provides a function of mapping multiple logical channels to multiple transport channels. The MAC layer also provides a function of logical channel multiplexing by mapping multiple logical channels to a single transport channel. The MAC layer provides data transmission services through logical channels.

[0071] The RLC layer performs concatenation, segmentation, and reassembly of Radio Link Control Service Data Units (RLC SDUs). In order to ensure different Quality of Service (QoS) required by Radio Bearers (RBs), the RLC layer provides three types of operation modes, namely, Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provides error correction through Automatic Repeat Request (ARQ).

[0072] The Radio Resource Control (RRC) layer is defined only in the control plane. And, the RRC layer performs the function of controlling physical channels, transport channels, and logical channels related to configuration, reconfiguration, and release of radio bearers. RB refers to a logical path provided by the first layer (i.e., the PHY layer) and the second layer (i.e., the MAC layer, the RLC layer, and the PDCP layer) to transmit data between the UE and the network.

[0073] The functions of the Packet Data Convergence Protocol (PDCP) in the user plane include transmission, header compression and encryption of user data. The functions of the Packet Data Convergence Protocol (PDCP) in the control plane include transmission and encryption / integrity protection of control plane data.

[0074] The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. The SDAP layer performs mapping between Quality of Service (QoS) flows and Data Radio Bearers (DRBs) and QoS Flow ID (QFI) marking in both DL and UL packets.

[0075] Configuration of RB refers to the process for specifying radio protocol layers and channel attributes to provide a specific service and for determining corresponding detailed parameters and operation methods. RB can then be classified into two types, namely, signaling radio bearer (SRB) and data radio bearer (DRB). SRB is used as a path for sending RRC messages in the control plane, and DRB is used as a path for sending user data in the user plane.

[0076] When the RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in the RRC connected (RRC_CONNECTED) state, otherwise the UE can be in the RRC idle (RRC_IDLE) state. In the case of NR, the RRC inactive (RRC_INACTIVE) state is additionally defined, and the UE in the RRC_INACTIVE state can maintain the connection with the core network and release its connection with the BS.

[0077] The downlink transmission channels for sending (or transmitting) data from the network to the UE include a broadcast channel (BCH) for sending system information and a downlink shared channel (SCH) for sending other user services or control messages. The services or control messages of downlink multicast or broadcast services can be sent via the downlink SCH or can be sent via a separate downlink multicast channel (MCH). In addition, the uplink transmission channels for sending (or transmitting) data from the UE to the network include a random access channel (RACH) for sending initial control messages and an uplink shared channel (SCH) for sending other user services or control messages.

[0078] Examples of logical channels belonging to a higher layer of a transport channel and mapped to a transport channel may include a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), a multicast traffic channel (MTCH), etc.

[0079] The physical channel is configured by multiple OFDM symbols in the time domain and multiple subcarriers in the frequency domain. A subframe is configured by multiple OFDM symbols in the time domain. A resource block is configured by multiple subcarriers and multiple OFDM symbols in a resource allocation unit. In addition, each subframe can use a specific subcarrier of a specific OFDM symbol (e.g., the first OFDM symbol) of the corresponding subframe of the physical downlink control channel (PDCCH), i.e., the L1 / L2 control channel. The transmission time interval (TTI) refers to the unit time of subframe transmission.

[0080] Figure 5 The structure of the NR system according to an embodiment of the present disclosure is shown. Figure 5 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0081] Reference Figure 5 In NR, a radio frame can be used to perform uplink and downlink transmissions. The length of a radio frame is 10ms and can be defined as consisting of two half frames (HF). A half frame can include five 1ms 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).

[0082] When a normal CP is used, each time slot may include 14 symbols. When an extended CP is used, each time slot may include 12 symbols. Herein, a symbol may include an OFDM symbol (or a CP-OFDM symbol) and a single carrier-FDMA (SC-FDMA) symbol (or a discrete Fourier transform spread OFDM (DFT-s-OFDM) symbol).

[0083] Table 1 below shows the number of time slots (N) of each symbol according to the SCS setting (μ) when the normal CP is used. slot symb ), the number of time slots per frame (N frame,μ slot ) and the number of time slots per subframe (N subframe,μ slot ).

[0084] [Table 1]

[0085] <![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

[0086] Table 2 shows an example of the number of symbols per slot, the number of slots per frame, and the number of slots per subframe according to the SCS in the case of using the extended CP.

[0087] [Table 2]

[0088] <![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

[0089] In the NR system, OFDM (A) parameter sets (e.g., SCS, CP length, etc.) between multiple cells integrated into one UE may be configured differently. Therefore, the (absolute time) duration (or interval) of a time resource (e.g., a subframe, a time slot, or a TTI) (collectively referred to as a time unit (TU) for simplicity) consisting of the same number of symbols may be configured differently in the integrated cells.

[0090] 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, and with an SCS of 30kHz / 60kHz, dense cities, lower latency, and wider carrier bandwidths can be supported. With an SCS of 60kHz or higher, bandwidths greater than 24.25GHz can be used to overcome phase noise.

[0091] The NR frequency band may be defined as two different types of frequency ranges. The two different types of frequency ranges may be FR1 and FR2. The values ​​of the frequency ranges may be changed (or varied), for example, the two different types of frequency ranges may be as shown in Table 3 below. Among the frequency ranges used in the NR system, FR1 may mean "a range below 6 GHz", and FR2 may mean "a range above 6 GHz", and may also be referred to as millimeter wave (mmW).

[0092] [Table 3]

[0093] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 450MHz–6000MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0094] As described above, the value of the frequency range in the NR system may be changed (or varied). For example, as shown in Table 4 below, FR1 may include a bandwidth in the range of 410 MHz to 7125 MHz. More specifically, FR1 may include frequency bands of 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher. For example, frequency bands of 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher included in FR1 may include unlicensed frequency bands. Unlicensed frequency bands may be used for various purposes, for example, unlicensed frequency bands are used for vehicle-specific communications (e.g., autonomous driving).

[0095] [Table 4]

[0096] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 410MHz–7125MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0097] Figure 6 The structure of the time slot of the NR frame according to an embodiment of the present disclosure is shown.

[0098] Reference Figure 6 , a time slot includes multiple symbols in the time domain. For example, in the case of normal CP, one time slot may include 14 symbols. For example, in the case of extended CP, one time slot may include 12 symbols. Alternatively, in the case of normal CP, one time slot may include 7 symbols. However, in the case of extended CP, one time slot may include 6 symbols.

[0099] A carrier includes 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 part (BWP) can be defined as multiple consecutive (physical) resource blocks ((P)RBs) in the frequency domain, and a BWP can correspond to a parameter set (e.g., SCS, CP length, etc.). A carrier can include up to N BWPs (e.g., 5 BWPs). Data communication can be performed via an activated BWP. Each element can be referred to as a resource element (RE) in a resource grid, and a complex symbol can be mapped to each element.

[0100] In addition, the radio interface between a UE and another UE or the radio interface between a UE and a network may include an L1 layer, an L2 layer, and an L3 layer. In various embodiments of the present disclosure, the L1 layer may refer to a physical layer. In addition, for example, the L2 layer may refer to at least one of a MAC layer, an RLC layer, a PDCP layer, and an SDAP layer. In addition, for example, the L3 layer may refer to an RRC layer.

[0101] Hereinafter, the bandwidth part (BWP) and the carrier will be described in detail.

[0102] A BWP may be a contiguous set of physical resource blocks (PRBs) within a given parameter set. A PRB may be selected from a contiguous set of common resource blocks (CRBs) for a given parameter set on a given carrier.

[0103] When bandwidth adaptation (BA) is used, the reception bandwidth and transmission bandwidth of the user equipment (UE) are not required to be as wide (or large) as the bandwidth of the cell, and the reception bandwidth and transmission bandwidth of the UE can be controlled (or adjusted). For example, the UE can receive information / configuration for bandwidth control (or adjustment) from the network / base station. In this case, bandwidth control (or adjustment) can be performed based on the received information / configuration. For example, bandwidth control (or adjustment) can include a reduction / expansion of bandwidth, a change in the position of bandwidth, or a change in the subcarrier spacing of bandwidth.

[0104] For example, the bandwidth can be reduced during a duration with little activity in order to save power. For example, the location of the bandwidth can be relocated (or moved) from the frequency domain. For example, the location of the bandwidth can be relocated (or moved) from the frequency domain to enhance scheduling flexibility. For example, the subcarrier spacing of the bandwidth can be changed. For example, the subcarrier spacing of the bandwidth can be changed to allow different services. A subset of the total cell bandwidth of a cell can be referred to as a bandwidth part (BWP). BA can be performed when the base station / network configures a BWP for the UE and when the base station / network notifies the UE of the BWP that is currently activated among the BWPs.

[0105] For example, the BWP may be at least any one of an active BWP, an initial BWP, and / or a default BWP. For example, the UE may not monitor the downlink radio link quality in a DL BWP other than an activated DL BWP on a primary cell (PCell). For example, the UE may not receive a PDCCH, a physical downlink shared channel (PDSCH), or a channel state information-reference signal (CSI-RS) (excluding RRM) other than an activated DL BWP. For example, the UE may not trigger a channel state information (CSI) report for an unactivated DL BWP. For example, the UE may not send a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) other than an activated UL BWP. For example, in the case of a downlink, the initial BWP may be given as a set of contiguous RBs for a remaining minimum system information (RMSI) control resource set (CORESET) (configured by a physical broadcast channel (PBCH)). For example, in the case of an uplink, the initial BWP may be given by a system information block (SIB) for a random access procedure. For example, a default BWP may be configured by a higher layer. For example, the initial value of the default BWP may be the initial DL BWP.To save energy, if the UE cannot detect downlink control information (DCI) during a specified period, the UE may switch the active BWP of the UE to the default BWP.

[0106] In addition, a BWP may be defined for SL. The same SL BWP may be used for both transmission and reception. For example, a transmitting UE may send a SL channel or a SL signal within a specific BWP, and a receiving UE may receive a SL channel or a SL signal within the same specific BWP. In a licensed carrier, the SL BWP may be defined separately from the Uu BWP, and the SLBWP may have configuration signaling separate from the Uu BWP. For example, the UE may receive a configuration for the SL BWP from the base station / network. The SL BWP may be (pre-)configured for out-of-coverage NR V2X UEs and RRC_IDLE UEs. For UEs operating in RRC_CONNECTED mode, at least one SL BWP may be activated within the carrier.

[0107] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown. Figure 7 The embodiments of can be combined with various embodiments of the present disclosure. Figure 7 In an implementation manner, the number of BWPs is 3.

[0108] Reference Figure 7 , a common resource block (CRB) may be a carrier resource block numbered from one end of a carrier frequency band to the other end thereof. Additionally, a PRB may be a resource block numbered within each BWP. Point A may indicate a common reference point of a resource block grid.

[0109] It can be obtained by point A, the offset relative to point A (N start BWP ) and bandwidth (N size BWP ) to configure the BWP. For example, point A can be an external reference point of the PRBs of the carrier, and subcarrier 0 of all parameter sets (e.g., all parameter sets supported by the network on the corresponding carrier) are aligned in point A. For example, the offset can be the PRB distance between the lowest subcarrier within a given parameter set and point A. For example, the bandwidth can be the number of PRBs within a given parameter set.

[0110] Hereinafter, V2X or SL communication will be described.

[0111] Figure 8 A radio protocol architecture for SL communication according to an embodiment of the present disclosure is shown. Figure 8 The embodiments of can be combined with various embodiments of the present disclosure. More specifically, Figure 8 (a) in FIG. 1 shows a user plane protocol stack, and Figure 8 (b) in FIG. 5 shows the control plane protocol stack.

[0112] Next, the side link synchronization signal (SLSS) and the synchronization information will be described in detail.

[0113] The SLSS may include a primary side link synchronization signal (PSSS) and a secondary side link synchronization signal (SSSS) as SL specific sequences. The PSSS may be referred to as a side link primary synchronization signal (S-PSS), and the SSSS may be referred to as a side link secondary synchronization signal (S-SSS). For example, an M sequence of length 127 may be used for the S-PSS, and a Gold sequence of length 127 may be used for the S-SSS. For example, the UE may use the S-PSS for initial signal detection and synchronization acquisition. For example, the UE may use the S-PSS and the S-SSS for acquiring detailed synchronization and for detecting a synchronization signal ID.

[0114] The physical sidelink broadcast channel (PSBCH) can be a (broadcast) channel for sending default (system) information, which the UE must first know before SL signal transmission / reception. For example, the default information can be information related to SLSS, duplex mode (DM), time division duplex (TDD) uplink / downlink (UL / DL) configuration, information related to resource pool, type of application related to SLSS, subframe offset, broadcast information, etc. For example, in order to evaluate PSBCH performance, in NR V2X, the payload size of PSBCH can be 56 bits, including a 24-bit cyclic redundancy check (CRC).

[0115] S-PSS, S-SSS, and PSBCH may 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 may have the same parameter set (i.e., SCS and CP length) as the physical sidelink control channel (PSCCH) / physical sidelink shared channel (PSSCH) in the carrier, and the transmission bandwidth may exist within a (pre-) configured sidelink (SL) BWP. For example, the S-SSB may have a bandwidth of 11 resource blocks (SBs). For example, the PSBCH may exist across 11 RBs. In addition, the frequency position of the S-SSB may be (pre-) configured. Therefore, the UE does not have to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0116] Fig. 9 A UE performing V2X or SL communication according to an embodiment of the present disclosure is shown. Fig. 9 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0117] Reference Fig. 9In V2X or SL communication, the term "UE" may generally refer to a user's UE. However, if a network device such as a BS transmits / receives a signal according to a communication scheme between UEs, the BS may also be regarded as a type of UE. For example, UE 1 may be a first device 100, and UE 2 may be a second device 200.

[0118] For example, UE 1 may select a resource unit corresponding to a specific resource in a resource pool meaning a set of resource series. In addition, UE 1 may send an SL signal by using the resource unit. For example, a resource pool in which UE 1 can send a signal may be configured to UE 2 as a receiving UE, and a signal of UE 1 may be detected in the resource pool.

[0119] Herein, if UE 1 is within the connection range of the BS, the BS may inform the resource pool to UE 1. Otherwise, if UE 1 is out of the connection range of the BS, another UE may inform UE 1 of the resource pool, or UE 1 may use a preconfigured resource pool.

[0120] Generally, a resource pool may be configured in units of multiple resources, and each UE may select one or more units of resources to use in its SL signaling.

[0121] Hereinafter, resource allocation in SL will be described.

[0122] Fig.10 A process of performing V2X or SL communication by a UE based on a transmission mode according to an embodiment of the present disclosure is shown. Fig.10 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure. In various embodiments of the present disclosure, the transmission mode may be referred to as a mode or a resource allocation mode. Hereinafter, for ease of explanation, in LTE, the transmission mode may be referred to as an LTE transmission mode. In NR, the transmission mode may be referred to as an NR resource allocation mode.

[0123] For example, Fig.10 (a) in FIG. 1 shows UE operations related to LTE transmission mode 1 or LTE transmission mode 3. Alternatively, for example, Fig.10 (a) in FIG. 1 shows UE operations related to NR resource allocation mode 1. For example, LTE transmission mode 1 can be applied to conventional SL communication, and LTE transmission mode 3 can be applied to V2X communication.

[0124] For example, Fig.10 (b) in FIG. 4 shows UE operations related to LTE transmission mode 2 or LTE transmission mode 4. Alternatively, for example, Fig.10 (b) in FIG. 1 shows UE operation related to NR resource allocation mode 2.

[0125] Reference Fig.10 In (a), in LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, the BS may schedule SL resources to be used by the UE for SL transmission. For example, the BS may perform resource scheduling for UE 1 through PDCCH (more specifically, downlink control information (DCI)), and UE 1 may perform V2X or SL communication for UE 2 according to the resource scheduling. For example, UE 1 may send sidelink control information (SCI) to UE 2 through a physical sidelink control channel (PSCCH), and thereafter send data based on the SCI to UE 2 through a physical sidelink shared channel (PSSCH).

[0126] Reference Fig.10 (b) in the figure, under LTE transmission mode 2, LTE transmission mode 4 or NR resource allocation mode 2, the UE can determine the SL transmission resources within the SL resources configured by the BS / network or the pre-configured SL resources. For example, the configured SL resources or the 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 in the configured resource pool. For example, the UE can autonomously select resources within the selection window by performing sensing and resource (re)selection processes. For example, sensing can be performed in units of subchannels. In addition, UE 1 that has autonomously selected resources in the resource pool can send SCI to UE 2 via PSCCH, and thereafter data based on the SCI can be sent to UE 2 via PSSCH.

[0127] Fig.11 Three playback types according to embodiments of the present disclosure are shown. Fig.11 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Fig.11 (a) shows broadcast type SL communication, Fig.11 (b) in FIG. 4 shows unicast type SL communication, and Fig.11 (c) shows multicast SL communication. In the case of unicast SL communication, the UE can perform one-to-one communication with another UE. In the case of multicast SL transmission, the UE can perform SL communication with one or more UEs in the group to which the UE belongs. In various embodiments of the present disclosure, SL groupcast communication can be replaced by SL multicast communication, SL one-to-many communication, etc.

[0128] Hereinafter, side link (SL) congestion control will be described.

[0129] If the UE autonomously determines the SL transmission resources, the UE also autonomously determines the size and frequency of use of the resources for use by the UE. Of course, due to constraints from the network, etc., the use of resource sizes or usage frequencies greater than or equal to a certain level may be limited. However, if all UEs use a relatively large amount of resources in a situation where many UEs are concentrated in a specific area at a specific time, the overall performance may be significantly degraded due to mutual interference.

[0130] Therefore, the UE may need to observe the channel situation. If it is determined that an excessive amount of resources are consumed, it is preferred that the UE autonomously reduce the use of resources. In the present disclosure, this can be defined as congestion control (CR). For example, the UE can determine whether the energy measured in the unit time / frequency resource is greater than or equal to a specific level, and can adjust the amount and frequency of use of its transmission resources based on the ratio of the unit time / frequency resources in which the energy greater than or equal to the specific level is observed. In the present disclosure, the ratio of the time / frequency resources in which the energy greater than or equal to the specific level is observed can be defined as the channel busy ratio (CBR). The UE can measure the CBR of the channel / frequency. In addition, the UE can send the measured CBR to the network / BS.

[0131] Fig.12 The resource unit used for CBR measurement according to the embodiment of the present disclosure is shown. Fig.12 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0132] Reference Fig.12 As a result of the UE measuring RSSI based on the subchannel within a specific period (e.g., 100 ms), the CBR may indicate the number of subchannels in which the measurement result value of the received signal strength indicator (RSSI) has a value greater than or equal to a preconfigured threshold. Alternatively, the CBR may indicate the ratio of subchannels having a value greater than or equal to the preconfigured threshold among the subchannels within a specific duration. For example, Fig.12 In an embodiment of the present invention, if it is assumed that a shadowed subchannel is a subchannel having a value greater than or equal to a preconfigured threshold, the CBR may represent a ratio of shadowed subchannels within a 100 ms period. In addition, the CBR may be reported to the BS.

[0133] In addition, congestion control that takes into account the priority of the service (e.g., packet) may be necessary. To this end, for example, the UE may measure the channel occupancy ratio (CR). Specifically, the UE may measure the CBR, and the UE may determine the maximum value CRlimitk of the channel occupancy k (CRk) that may be occupied by the traffic corresponding to each priority (e.g., k) based on the CBR. For example, the UE may derive the maximum value CRlimitk of the channel occupancy related to the priority of each traffic based on a predetermined table of CBR measurements. For example, in the case of a service with a relatively high priority, the UE may derive a relatively large maximum value of the channel occupancy. Thereafter, the UE may perform congestion control by limiting the sum of the channel occupancies of the traffic whose priority k is lower than i to a value less than or equal to a specific value. Based on this method, the channel occupancy may be more strictly limited for services with relatively low priorities.

[0134] In addition to this, the UE can perform SL congestion control by using adjusting the transmit power level, discarding packets, determining whether to perform retransmission, adjusting the transmit RB size (MCS coordination), etc.

[0135] Hereinafter, a hybrid automatic repeat request (HARQ) process will be described.

[0136] An error compensation scheme is used to ensure communication reliability. Examples of error compensation schemes may include a forward error correction (FEC) scheme and an automatic repeat request (ARQ) scheme. In the FEC scheme, errors in the receiving end can be corrected by appending an additional error correction code to the information bit. The FEC scheme has the advantages of small time delay and no additional information exchange between the transmitting end and the receiving end, but at the same time has the disadvantage of decreased system efficiency in a good channel environment. The ARQ scheme has the advantage of being able to improve transmission reliability, but at the same time has the disadvantage of time delay and decreased system efficiency in a bad channel environment.

[0137] A hybrid automatic repeat request (HARQ) scheme is a combination of an FEC scheme and an ARQ scheme. In the HARQ scheme, it is determined whether an unrecoverable error is included in data received by a physical layer, and retransmission is requested after the error is detected, thereby improving performance.

[0138] In the case of SL unicast and SL multicast, HARQ feedback and HARQ combining in the physical layer can be supported. For example, in the case where the receiving UE operates in resource allocation mode 1 or 2, the receiving UE can receive PSSCH from the transmitting UE, and the receiving UE can send HARQ feedback corresponding to PSSCH to the transmitting UE using the sidelink feedback control information (SFCI) format through the physical sidelink feedback channel (PSFCH).

[0139] For example, SLHARQ feedback may be enabled for unicast. In this case, in a non-code block group (non-CBG), the receiving UE may decode the PSCCH targeted to the receiving UE, and when the receiving UE successfully decodes the transport block associated with the PSCCH, the receiving UE may generate a HARQ-ACK. Thereafter, the receiving UE may send the HARQ-ACK to the transmitting UE. Conversely, after the receiving UE decodes the PSCCH targeted to the receiving UE, if the receiving UE fails to successfully decode the transport block associated with the PSCCH, the receiving UE may generate a HARQ-NACK, and the receiving UE may send the HARQ-NACK to the transmitting UE.

[0140] For example, SL HARQ feedback may be enabled for multicast.For example, during non-CBG, two different types of HARQ feedback options may be supported for multicast.

[0141] (1) Multicast Option 1: After decoding the PSCCH targeted at the receiving UE, if the receiving UE fails to decode the transport block associated with the PSCCH, the receiving UE may send a HARQ-NACK to the transmitting UE via the PSFCH. Conversely, when the receiving UE decodes the PSCCH targeted at the receiving UE and when the receiving UE successfully decodes the transport block associated with the PSCCH, the receiving UE does not send a HARQ-ACK to the transmitting UE.

[0142] (2) Multicast Option 2: After decoding the PSCCH targeted at the receiving UE, if the receiving UE fails to decode the transport block associated with the PSCCH, the receiving UE may send a HARQ-NACK to the transmitting UE via the PSFCH. Also, when the receiving UE decodes the PSCCH targeted at the receiving UE and when the receiving UE successfully decodes the transport block associated with the PSCCH, the receiving UE may send a HARQ-ACK to the transmitting UE via the PSFCH.

[0143] For example, if multicast option 1 is used in SL HARQ feedback, all UEs performing multicast communication can share PSFCH resources. For example, UEs belonging to the same group can send HARQ feedback by using the same PSFCH resources.

[0144] For example, if multicast option 2 is used in SL HARQ feedback, each UE performing multicast communication may use different PSFCH resources for HARQ feedback transmission. For example, UEs belonging to the same group may send HARQ feedback by using different PSFCH resources.

[0145] For example, when SL HARQ feedback is enabled for groupcast, the receiving UE may determine whether to send HARQ feedback to the transmitting UE based on transmit-receive (TX-RX) distance and / or reference signal received power (RSRP).

[0146] For example, in multicast option 1, in the case of HARQ feedback based on TX-RX distance, if the TX-RX distance is less than or equal to the communication range requirement, the receiving UE may send HARQ feedback in response to the PSSCH to the transmitting UE. Otherwise, if the TX-RX distance is greater than the communication range requirement, the receiving UE may not send HARQ feedback in response to the PSSCH to the transmitting UE. For example, the transmitting UE may inform the receiving UE of the location of the transmitting UE via the SCI associated with the PSSCH. For example, the SCI associated with the PSSCH may be a second SCI. For example, the receiving UE may estimate or obtain the TX-RX distance based on the location of the receiving UE and the location of the transmitting UE. For example, the receiving UE may decode the SCI associated with the PSSCH, and therefore may know the communication range requirement for the PSSCH.

[0147] For example, in the case of resource allocation mode 1, the time (offset) between PSFCH and PSSCH can be configured or pre-configured. In the case of unicast and multicast, if retransmission is required on the SL, it can be indicated to the BS by the UE within the coverage area using PUCCH. The sending UE can send an indication to the serving BS of the sending UE in the form of a scheduling request (SR) / buffer status report (BSR) instead of a HARQ ACK / NACK. In addition, even if the BS does not receive the indication, the BS can schedule SL retransmission resources for the UE. For example, in the case of resource allocation mode 2, the time (offset) between PSFCH and PSSCH can be configured or pre-configured.

[0148] For example, from the perspective of UE transmission in a carrier, for a PSFCH format for SL in a time slot, TDM between PSCCH / PSSCH and PSFCH may be allowed. For example, a sequence-based PSFCH format with a single symbol may be supported. Herein, the single symbol may not be an automatic gain control (AGC) duration. For example, a sequence-based PSFCH format may be applied to unicast and multicast.

[0149] For example, in a time slot associated with a resource pool, the PSFCH resource may be periodically configured for N time slot durations, or may be preconfigured. For example, N may be configured as one or more values ​​greater than or equal to 1. For example, N may be 1, 2, or 4. For example, HARQ feedback for transmissions in a specific resource pool may be sent over the PSFCH only on the specific resource pool.

[0150] For example, if a transmitting UE sends a PSSCH to a receiving UE across time slot #x to time slot #n, the receiving UE may send HARQ feedback in response to the PSSCH to the transmitting UE in time slot #(N+A). For example, time slot #(N+A) may include PSFCH resources. Herein, for example, A may be a minimum integer greater than or equal to K. For example, K may be the number of logical time slots. In this case, K may be the number of time slots in a resource pool. Alternatively, for example, K may be the number of physical time slots. In this case, K may be the number of time slots inside or outside the resource pool.

[0151] For example, if the receiving UE sends HARQ feedback on the PSFCH resource in response to a PSSCH sent by the transmitting UE to the receiving UE, the receiving UE may determine the frequency domain and / or code domain of the PSFCH resource based on an implicit mechanism in the configured resource pool. For example, the receiving UE may determine the frequency domain and / or code domain of the PSFCH resource based on at least one of a timeslot index associated with the PSCCH / PSSCH / PSFCH, a subchannel associated with the PSCCH / PSSCH, or an identifier for each receiving UE in a group for identifying HARQ feedback based on multicast option 2. Additionally / alternatively, for example, the receiving UE may determine the frequency domain and / or code domain of the PSFCH resource based on at least one of SL RSRP, SINR, L1 source ID, and / or location information.

[0152] For example, if HARQ feedback transmission via the UE's PSFCH overlaps with HARQ feedback reception via the PSFCH, the UE may select either HARQ feedback transmission via the PSFCH or HARQ feedback reception via the PSFCH based on a priority rule. For example, the priority rule may be based at least on a priority indication of the associated PSCCH / PSSCH.

[0153] For example, if HARQ feedback transmissions by UEs via PSFCH overlap for multiple UEs, the UEs may select a specific HARQ feedback transmission based on a priority rule. For example, the priority rule may be based on the lowest priority indication of the related PSCCH / PSSCH.

[0154] Hereinafter, SL measurement and reporting will be described.

[0155] For the purpose of QoS prediction, initial transmission parameter setting, link adaptation, link management, admission control, etc., SL measurements and reports (e.g., RSRP, RSRQ) between UEs may be considered in SL. For example, a receiving UE may receive a reference signal from a transmitting UE, and the receiving UE may measure the channel state of the transmitting UE based on the reference signal. In addition, the receiving UE may report channel state information (CSI) to the transmitting UE. SL-related measurements and reports may include measurements and reports of CBR and reports of location information. Examples of channel state information (CSI) for V2X may include channel quality indicator (CQI), precoding matrix index (PM), rank indicator (RI), reference signal received power (RSRP), reference signal received quality (RSRQ), path gain / path loss, sounding reference symbol (SRS) resource indicator (SRI), SRI-RS resource indicator (CRI), interference conditions, vehicle motion, etc. In the case of unicast communication, under the assumption of four or fewer antenna ports, CQI, RI and PMI or some of them may be supported in non-subband-based aperiodic CSI reports. The CSI process may not rely on an independent reference signal (RS). CSI reporting may be activated or deactivated based on configuration.

[0156] For example, a transmitting UE may transmit a CSI-RS to a receiving UE, and the receiving UE may measure CQI or RI based on the CSI-RS. For example, the CSI-RS may be referred to as an SL CSI-RS. For example, the CSI-RS may be restricted to PSSCH transmissions. For example, a transmitting UE may perform transmissions to a receiving UE by including the CSI-RS on the PSSCH.

[0157] In addition, in the present disclosure, for example, a transmitting UE (TX UE) may be a UE that transmits data to a (target) receiving UE (RX UE). For example, the TX UE may be a UE that performs PSCCH transmission and / or PSSCH transmission. For example, the TX UE may be a UE that sends a SL CSI-RS and / or a SL CSI report request indicator to a (target) RX UE. For example, the TX UE may be a UE that sends a (predefined) reference signal (e.g., a PSSCH demodulation reference signal (DM-RS)) and / or a SL (L1) RSRP report request indicator to a (target) RX UE for SL (L1) RSRP measurement. For example, the TX UE may be a UE that sends a (control) channel (e.g., PSCCH, PSSCH, etc.) and / or a reference signal on a (control) channel (e.g., DM-RS, CSI-RS, etc.) for SLRLM operation and / or SL RFL operation of a (target) RX UE.

[0158] In addition, in the present disclosure, for example, a receiving UE (RX UE) may be a UE that sends SL HARQ feedback to a transmitting UE (TX UE) based on whether decoding of data received from the TX UE is successful and / or detection / decoding of a PSCCH (related to PSSCH scheduling) sent by the TX UE is successful. For example, the RX UE may be a UE that performs SL CSI transmission to the TX UE based on the SL CSI-RS and / or SL CSI report request indicator received from the TX UE. For example, the RX UE is a UE that sends to the TX UE a SL (L1) RSRP measurement value measured based on the SL (L1) RSRP report request indicator and / or a (predefined) reference signal received from the TX UE. For example, the RX UE may be a UE that sends data of the RX UE to the TX UE. For example, the RX UE may be a UE that performs SL RLM operation and / or SL RLF operation based on a (preconfigured) (control) channel and / or a reference signal on a (control) channel received from the TX UE.

[0159] In addition, in the present disclosure, for example, the TX UE may send at least one of the following information to the RX UE through the SCI. Herein, for example, the TX UE may send at least one of the following information to the RX UE through the first SCI and / or the second SCI.

[0160] -PSSCH (and / or PSCCH) related resource allocation information (e.g., location / number of time / frequency resources, resource reservation information (e.g., time period))

[0161] -SL CSI report request indicator or SL (L1) RSRP (and / or SL (L1) RSRQ and / or SL (L1) RSSI) report request indicator

[0162] -SL CSI transmission indicator (or SL (L1) RSRP (and / or SL (L1) RSRQ and / or SL (L1) RSSI) information transmission indicator) (on PSSCH)

[0163] - Modulation and Coding Scheme (MCS) information

[0164] -TX power information

[0165] - L1 destination ID information and / or L1 source ID information

[0166] -SL HARQ process ID information

[0167] -New Data Indicator (NDI) information

[0168] - Redundancy Version (RV) information

[0169] -QoS information (for example, priority information) (related to the transmission service / packet)

[0170] - Information on the number of antenna ports used for (transmitting) SL CSI-RS or SL CSI-RS transmission indicator

[0171] - The location (or distance range) information of the target RX UE (for which SL HARQ feedback is requested) or the TX UE location information

[0172] - Reference signal (e.g., DM-RS, etc.) information related to decoding (and / or channel estimation) of data sent through PSSCH. For example, information related to the pattern of (time-frequency) mapping resources of DM-RS, rank information, antenna port index information, etc.

[0173] In addition, in the present disclosure, for example, the PSCCH may be replaced / replaced by the SCI and / or the first SCI and / or the second SCI, and vice versa. For example, the SCI may be replaced / replaced by the PSCCH and / or the first SCI and / or the second SCI, and vice versa. For example, since the TX UE may send the second SCI to the RX UE via the PSSCH, the PSSCH may be replaced / replaced by the second SCI, and vice versa. For example, if the SCI configuration field is divided into two groups in consideration of the (relatively) high SCI payload size, the first SCI including the first SCI configuration field group may be referred to as the first SCI or the first-level SCI, and the second SCI including the second SCI configuration field group may be referred to as the second SCI or the second-level SCI. For example, the first SCI may be sent via the PSCCH. For example, the second SCI may be sent via the (independent) PSCCH. For example, the second SCI may be carried and sent together with the data via the PSSCH.

[0174] In addition, in the present disclosure, for example, the term "configured / configured" or the term "defined / defined" may refer to (pre-) configuration (for each resource pool) from a base station or a network (through predefined signaling (e.g., SIB, MAC, RRC, etc.). For example, "A is configured to" may mean "the base station / network sends information related to A to the UE".

[0175] In addition, in the present disclosure, for example, an RB may be replaced / replaced by a subcarrier, and vice versa. For example, a packet or service may be replaced / replaced by a transport block (TB) or a medium access control protocol data unit (MAC PDU) based on a transmission layer, and vice versa. For example, a code block group (CBG) may be replaced / replaced by a TB, and vice versa. For example, a source ID may be replaced / replaced by a destination ID, and vice versa. For example, an L1 ID may be replaced / replaced by an L2 ID, and vice versa. For example, an L1 ID may be an L1 source ID or an L1 destination ID. For example, an L2 ID may be an L2 source ID or an L2 destination ID.

[0176] In addition, in the present disclosure, for example, the operation of the sending UE reserving / selecting / determining retransmission resources may include: the operation of the sending UE reserving / selecting / determining potential retransmission resources whose actual use will be determined based on the SL HARQ feedback information received from the receiving UE.

[0177] Furthermore, in the present disclosure, a sub-selection window may be replaced / substituted with a selection window and / or a preconfigured number of resource sets within a selection window, and vice versa.

[0178] In addition, in the present disclosure, SL MODE 1 may refer to a resource allocation method or a communication method in which a base station directly schedules SL transmission resources for a TX UE through predefined signaling (e.g., a DCI or RRC message). For example, SL MODE 2 may refer to a resource allocation method or a communication method in which a UE independently selects SL transmission resources from a resource pool preconfigured or configured by a base station or a network. For example, a UE that performs SL communication based on SL MODE 1 may be referred to as a MODE 1UE or a MODE 1TXUE, and a UE that performs SL communication based on SL MODE 2 may be referred to as a MODE 2UE or a MODE 2TX UE.

[0179] In addition, in the present disclosure, for example, a dynamic grant (DG) may be replaced / replaced by a configuration grant (CG) and / or a semi-persistent scheduling (SPS) grant, or vice versa. For example, a DG may be replaced / replaced by a combination of a CG and an SPS grant, or vice versa. For example, a CG may include at least one of a configuration grant (CG) type 1 and / or a configuration grant (CG) type 2. For example, in CG type 1, a grant may be provided by RRC signaling and may be stored as a configuration grant. For example, in CG type 2, a grant may be provided by PDCCH and may be stored or deleted as a configuration grant based on L1 signaling indicating the enabling or disabling of the grant. For example, in CG type 1, a base station may allocate periodic resources to a TX UE via an RRC message. For example, in CG type 2, a base station may allocate periodic resources to a TX UE via an RRC message, and the base station may dynamically enable or disable the periodic resources via DCI.

[0180] In addition, in the present disclosure, a channel may be replaced / replaced with a signal, or vice versa. For example, the sending / receiving of a channel may include the sending / receiving of a signal. For example, the sending / receiving of a signal may include the sending / receiving of a channel. For example, the playing may be replaced / replaced with at least one of unicast, multicast and / or broadcast, or vice versa. For example, the playing type may be replaced / replaced with at least one of unicast, multicast and / or broadcast, or vice versa.

[0181] Furthermore, in the present disclosure, resources may be replaced / substituted with time slots or symbols, and vice versa. For example, resources may include time slots and / or symbols.

[0182] In addition, in the present disclosure, priority can be replaced / substituted with at least one of logical channel priority (LCP), waiting time, reliability, minimum required communication range, per packet priority (PPPP), side link radio bearer (SLRB), QoS profile, QoS parameters and / or requirements, and vice versa.

[0183] Furthermore, in the present disclosure, for example, for convenience of description, a (physical) channel used when the RX UE transmits at least one of the following information to the TX UE may be referred to as a PSFCH.

[0184] -SL HARQ feedback, SL CSI, SL (L1) RSRP

[0185] In addition, in the present disclosure, the Uu channel may include a UL channel and / or a DL channel. For example, the UL channel may include a PUSCH, a PUCCH, a sounding reference signal (SRS), etc. For example, the DL channel may include a PDCCH, a PDSCH, a PSS / SSS, etc. For example, the SL channel may include a PSCCH, a PSSCH, a PSFCH, a PSBCH, a PSSS / SSSS, etc.

[0186] In addition, in the present disclosure, the sidelink information may include at least one of a sidelink message, a sidelink packet, a sidelink service, a sidelink data, a sidelink control information and / or a sidelink transport block (TB). For example, the sidelink information may be sent via PSSCH and / or PSCCH.

[0187] Furthermore, in the present disclosure, a high priority may mean a small priority value, and a low priority may mean a large priority value. For example, Table 5 shows an example of priority.

[0188] [Table 5]

[0189] Service or logical channel Priority value Service A or Logical Channel A 1 Service B or logical channel B 2 Service C or logical channel C 3

[0190] Referring to Table 5, for example, service A or logical channel A associated with the smallest priority value may have the highest priority. For example, service C or logical channel C associated with the largest priority value may have the lowest priority.

[0191] In addition, 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 the one or more transmission resources to the receiving UE.

[0192] In addition, when performing sidelink communication, a method in which the transmitting UE reserves or predetermines transmission resources for the receiving UE may be representatively as follows.

[0193] For example, the transmitting UE may perform the reservation of transmission resources based on the chain. Specifically, for example, if the transmitting UE reserves K transmission resources, the transmitting UE may send the location information of less than K transmission resources to the receiving UE through the SCI sent to the receiving UE at any (or specific) transmission time or time resource. That is, for example, the SCI may include the location information of less than K transmission resources. Alternatively, for example, if the transmitting UE reserves K transmission resources associated with a specific TB, the transmitting UE may send the location information of less than K transmission resources to the receiving UE through the SCI sent to the receiving UE at any (or specific) transmission time or time resource. That is, the SCI may include the location information of less than K transmission resources. In this case, for example, by signaling the location information of less than K transmission resources to the receiving UE only via one SCI sent by the transmitting UE at any (or specific) transmission time or time resource, performance degradation caused by excessive increase in the payload of the SCI can be prevented.

[0194] Fig.13 A method in which a UE having reserved transmission resources notifies another UE of the transmission resources according to an embodiment of the present disclosure is shown. Fig.13 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0195] Specifically, for example, Fig.13 (a) shows a method for performing chain-based resource reservation by a transmitting UE by sending / signaling location information of (maximum) 2 transmission resources to a receiving UE via one SCI in the case of a value of K=4. For example, Fig.13 (b) shows a method for performing chain-based resource reservation by a transmitting UE by sending / signaling location information of (maximum) 3 transmission resources to a receiving UE via one SCI in the case of a value of K=4. Fig.13 (a) and (b), the transmitting UE may send / signal only the location information of the fourth transmission-related resources to the receiving UE via the fourth (or last) transmission-related PSCCH. Fig.13 (a), the transmitting UE may send / signal not only the location information of the fourth transmission-related resources but also the location information of the third transmission-related resources to the receiving UE via the fourth (or last) transmission-related PSCCH. Fig.13 (b), the transmitting UE may send / signal not only the location information of the fourth transmission-related resources but also the location information of the second transmission-related resources and the location information of the third transmission-related resources to the receiving UE through the fourth (or last) transmission-related PSCCH. In this case, for example, Fig.13In (a) and (b), if the transmitting UE can send / signal only the location information of the fourth transmission-related resources to the receiving UE through 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 to a preconfigured value (e.g., 0). Fig.13 In (a) and (b), if the sending UE can send / signal only the location information of the fourth transmission-related resources to the receiving UE through the fourth (or last) transmission-related PSCCH, the sending UE can set or designate the field / bit of the location information of the unused or remaining transmission resources to a preconfigured status / bit value indicating / representing the last transmission (among the 4 transmissions).

[0196] In addition, for example, the transmitting UE may perform reservation of transmission resources on a block basis. Specifically, for example, if the transmitting UE reserves K transmission resources, the transmitting UE may send the location information of the K transmission resources to the receiving UE through the SCI sent to the receiving UE at any (or specific) transmission time or time resource. That is, the SCI may 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 may send the location information of the K transmission resources to the receiving UE through the SCI sent to the receiving UE at any (or specific) transmission time or time resource. That is, the SCI may include the location information of the K transmission resources. For example, Fig.13 (c) shows a method of performing block-based resource reservation by a transmitting UE by signaling location information of 4 transmission resources to a receiving UE via one SCI in the case of a value of K=4.

[0197] In addition, if the SL HARQ feedback operation is configured / applied to a UE performing SL communication, service-related requirements (e.g., reliability, error rate, etc.) can be effectively met. To this end, for example, the TX UE can send SL information via PSSCH and / or PSCCH, and the RX UE can send SL HARQ feedback information via PSFCH. For example, the TX UE can send SL information to a target RX UE of the TX UE via PSSCH and / or PSCCH. For example, the RX UE can be a target RX UE of the TX UE. For example, the RX UE can send SL HARQ feedback information to the TX UE via PSFCH. For example, the composition of the SL HARQ feedback information sent by the RX UE via PSFCH and / or the amount of the SL HARQ feedback information (e.g., the number of bits) can be determined / defined based on part or all of the following schemes.

[0198] (1) Dynamic Codebook

[0199] For example, the composition of the SL HARQ feedback information and / or the amount of the SL HARQ feedback information sent by the RX UE via the PSFCH may be determined / defined based on a dynamic codebook. In this case, for example, based on the number of (new) TBs sent by the TX UE, the RX UE may change / determine the amount of SL HARQ feedback information to be sent. For example, based on the number of (new) TBs sent by the TX UE, the RX UE may change / determine the amount of SL HARQ feedback information to be sent to the TX UE.

[0200] For example, if the RX UE fails to decode the PSCCH, for example, if the RX UE fails to decode the PSCCH sent by the TX UE, the TX UE should perform blind decoding on the amount of SL HARQ feedback information sent by the RX UE via the PSFCH and / or the PSFCH resources used by the RX UE to transmit the SL HARQ feedback information. For example, based on the amount of SL HARQ feedback information sent by the RX UE, the RX UE may generate / send the SL HARQ feedback information by using the number and phase values ​​of different cyclic shifts (CS) associated with a zadoff-chu (ZC) sequence. For example, if the SL HARQ feedback information sent by the RX UE is 1 bit, the RX UE may generate / send the SL HARQ feedback information by using 2 CS values. For example, if the SL HARQ feedback information sent by the RX UE is 2 bits, the RX UE may generate / send the SL HARQ feedback information by using 4 CS values. For example, if the TX UE sends 3 TBs to the RX UE and the RX UE fails to decode the PSCCH associated with 1 TB, the RX UE may send 2-bit HARQ feedback information to the TX UE. In this case, the TX UE expecting to receive 3-bit HARQ feedback information should perform blind decoding on the HARQ feedback information.

[0201] Herein, for example, in order to alleviate the problem of the TX UE performing blind decoding on the amount of SL HARQ feedback information sent by the RX UE via the PSFCH and / or the PSFCH resources used by the RX UE to transmit the SL HARQ feedback information, the TX UE may send to the RX UE an SCI including an indicator field indicating how many (new) TB transmissions the TX UE performs to the RX UE. For example, the SCI may be a second SCI.

[0202] (2) (Semi-static) codebook

[0203] For example, the composition of the SL HARQ feedback information and / or the amount of the SL HARQ feedback information sent by the RX UE through the PSFCH may be determined / defined based on a (semi-)static codebook.

[0204] For example, the number of time slots of PSSCH resources associated with PSFCH resources and / or the number of time slots of PSCCH resources associated with PSFCH resources may be configured or preconfigured for the UE. For example, the number of time slots of PSSCH resources associated with PSFCH resources and / or the number of time slots of PSCCH resources associated with PSFCH resources may be configured or preconfigured for the UE for each resource pool.

[0205] For example, the position of the PSSCH resources associated with the PSFCH resources and / or the position of the PSCCH resources associated with the PSFCH resources may be configured or preconfigured for the UE. For example, the position of the PSSCH resources associated with the PSFCH resources and / or the position of the PSCCH resources associated with the PSFCH resources may be configured or preconfigured for the UE for each resource pool.

[0206] For example, an index of a PSSCH resource associated with a PSFCH resource and / or an index of a PSCCH resource associated with a PSFCH resource may be configured or preconfigured for a UE. For example, an index of a PSSCH resource associated with a PSFCH resource and / or an index of a PSCCH resource associated with a PSFCH resource may be configured or preconfigured for a UE for each resource pool.

[0207] For example, based on at least one of the number of time slots of the PSSCH resources associated with the PSFCH resources, the number of time slots of the PSCCH resources associated with the PSFCH resources, the position of the PSSCH resources associated with the PSFCH resources, the position of the PSCCH resources associated with the PSFCH resources, the index of the PSSCH resources associated with the PSFCH resources and / or the index of the PSCCH resources associated with the PSFCH resources, the UE can determine the amount of SL HARQ feedback information included in the PSFCH.

[0208] For example, the RX UE may give priority to including feedback information related to PSSCH time slots and / or PSCCH time slots with relatively low indexes (before the PSFCH time slot) in sequence in the SL HARQ feedback information (on a specific PSFCH). For example, the RX UE may give priority to including feedback information related to PSSCH time slots and / or PSCCH time slots with relatively high indexes (before the PSFCH time slot) in sequence in the SL HARQ feedback information (on a specific PSFCH). For example, the RX UE may give priority to including feedback information related to PSSCH time slots and / or PSCCH time slots with pre-configured indexes (before the PSFCH time slot) in sequence in the SL HARQ feedback information (on a specific PSFCH). In addition, for example, the RX UE may send the SL HARQ feedback information to the TX UE via a specific PSFCH.

[0209] Based on various embodiments of the present disclosure, the UE may measure / obtain the CBR based on Table 6.

[0210] [Table 6]

[0211]

[0212] Based on various embodiments of the present disclosure, the UE may measure / obtain the CR based on Table 7.

[0213] [Table 7]

[0214]

[0215] In addition, for example, in order to enable the first UE to obtain / calculate SL CSI information, non-zero power (NZP) CSI-RS and channel state information-interference measurement (CSI-IM) can be configured for the first UE. For example, the second UE can send NZP CSI-RS and / or CSI-IM to the first UE, and the first UE can calculate / obtain SL channel state information (CSI) information of the second UE based on the NZP CSI-RS and / or CSI-IM. For example, the CSI-IM can be a zero power (ZP) CSI-RS. In this article, for example, the first UE can use the NZP CSI-RS for the expected link quality / channel measurement / channel estimation, and the first UE can use the CSI-IM for interference measurement and / or interference estimation.

[0216] For example, the second UE may transmit NZP CSI-RS and / or CSI-IM only on the (scheduled) PSSCH resource region. For example, the second UE may transmit NZP CSI-RS and / or CSI-IM only when transmitting PSSCH.

[0217] For example, the second UE may send NZP CSI-RS and / or CSI-IM only on the (scheduled) PSSCH and / or PSCCH resource region. For example, the second UE may send NZP CSI-RS and / or CSI-IM only when sending PSSCH and / or PSCCH.

[0218] In addition, after the TX UE requests the RX UE to report SL CSI information, if certain conditions are met, it is unclear whether the TX UE can request additional SL CSI information reporting within the associated (report) waiting time budget. In addition, if congestion control (e.g., maximum allowed transmission power value) is applied to the SL transmission operation performed at a specific time, it is unclear what the relationship between the (associated) CBR measurement timing and the SL parameter set (e.g., SCS) is. In addition, when the TX UE performs PSSCH transmission, it is unclear how to define the precoding resource block group (PRG).

[0219] Fig.14 The process of a UE sending a CSI-RS and / or a CSI-IM based on an embodiment of the present disclosure is shown. Fig.14 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0220] Reference Fig.14 In step S1410, the UE may map the NZP CSI-RS and / or CSI-IM to a resource block (eg, RE). In step S1420, the UE may transmit the NZP CSI-RS and / or CSI-IM.

[0221] For example, the UE may send the NZP CSI-RS and / or CSI-IM by (limitedly) mapping to the same symbol. For example, the UE may not map the data information to the RE positioned in FDM form relative to the symbol (e.g., RE) to which the NZP CSI-RS and / or CSI-IM are mapped. Specifically, for example, the data information and the NZP CSI-RS may be mapped to the symbol in TDM form. Specifically, for example, the data information and the CSI-IM may be mapped to the symbol in TDM form. For example, the UE may not map the second SCI to the RE positioned in FDM form relative to the symbol (e.g., RE) to which the NZP CSI-RS and / or CSI-IM are mapped. Specifically, for example, the second SCI and the NZP CSI-RS may be mapped to the symbol in TDM form. Specifically, for example, the second SCI and the CSI-IM may be mapped to the symbol in TDM form. For example, the UE may not map the PT-RS to an RE positioned in FDM form relative to the symbol (e.g., RE) to which the NZP CSI-RS and / or CSI-IM are mapped. Specifically, for example, the PT-RS and NZP CSI-RS may be mapped to the symbol in TDM form. Specifically, for example, the PT-RS and CSI-IM may be mapped to the symbol in TDM form. For example, data information / second SCI / PT-RS and NZP CSI-RS / CSI-IM may be mapped to the symbol in TDM form.

[0222] For example, if the above rules are applied, the UE may map only the NZP CSI-RS and CSI-IM to specific symbols. That is, for example, the UE may map and transmit only the NZP CSI-RS and CSI-IM to specific symbols, while data information, the second SCI, PT-RS, etc. may not be mapped to specific symbols.

[0223] For example, if power spectral density (PSD) boosting of NZP CSI-RS is applied / configured for the UE (in a resource pool specific manner), the UE may not map the second SCI to REs positioned in FDM form relative to the symbols (e.g., REs) to which the NZP CSI-RS and / or CSI-IM are (exceptively) mapped. For example, if power spectral density (PSD) boosting of NZP CSI-RS is applied / configured for the UE (in a resource pool specific manner), the UE may not map data information to REs positioned in FDM form relative to the symbols (e.g., REs) to which the NZP CSI-RS and / or CSI-IM are (exceptively) mapped. For example, if power spectral density (PSD) boosting of NZP CSI-RS is applied / configured for the UE (in a resource pool specific manner), the UE may not map PT-RS to REs positioned in FDM form relative to the symbols (e.g., REs) to which the NZP CSI-RS and / or CSI-IM are (exceptively) mapped. In this case, for example, since the PSD of the RE related to the second SCI and / or the data information about the symbol to which the CSI-IM is mapped is increased compared to other symbols (for example, only the symbol to which the second SCI and / or the data information is mapped), the problem of transient period can be alleviated.

[0224] For example, if the UE maps at least one of the second SCI, data information and / or PT-RS to an RE positioned in FDM form relative to the symbol to which the CSI-IM is mapped, the UE may be configured not to adopt the PSD of the CSI-IM (RE). Specifically, for example, if the UE maps at least one of the second SCI, data information and / or PT-RS to an RE positioned in FDM form relative to the symbol to which the CSI-IM is mapped, the UE may allocate power to the RE to which the CSI-IM is mapped. Specifically, for example, if the UE maps at least one of the second SCI, data information and / or PT-RS to an RE positioned in FDM form relative to the symbol to which the CSI-IM is mapped, the UE may assume that the RE to which the CSI-IM is mapped is the RE to which the data information and / or the second SCI are mapped, and the UE may allocate power to the RE to which the CSI-IM is mapped. In this case, the RE to which the CSI-IM is mapped may be interpreted as an RE to which virtual data information and / or a virtual second SCI is mapped.

[0225] For example, based on the above-mentioned embodiments, the PSD boosting operation of the NZP CSI-RS (RE) for improving the accuracy of channel estimation can be relatively easily implemented. For example, for the NZP CSI-RS, the PSD of the CSI-IM (RE) can be adopted. For example, based on the above-mentioned embodiments, for a UE receiving the NZP CSI-RS, if the UE sends the NZP CSI-RS by performing PSD boosting on the NZP CSI-RS (RE), the problem of reduced demodulation performance of the data information and / or the second SCI located in the form of FDM with the NZP CSI-RS (RE) can be alleviated.

[0226] Fig.15 A process in which a UE performs SL communication based on CBR according to an embodiment of the present disclosure is shown. Fig.15 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0227] Reference Fig.15 , in step S1510, the UE may measure the CBR. For example, the UE may measure the CBR of the resource pool. For example, the UE may measure the CBR based on Table 6, and may obtain the CBR value. In step S1520, the UE may perform SL transmission based on the CBR value. For example, the UE may send PSCCH and / or PSSCH based on the CBR value. For example, the UE may determine the transmit power associated with the PSCCH and / or PSSCH based on the CBR value, and the UE may send the PSCCH and / or PSSCH based on the transmit power.

[0228] For example, the maximum SL transmit power value of the UE may be configured differently for each CBR range for the UE. For example, the maximum SL transmit power value of the UE may be configured differently for each priority level associated with SL information (e.g., a packet or service). In this document, for example, if the UE performs SL transmission in (logical) time slot #N (in a resource pool), the CBR value used to set the maximum SL transmit power value of the UE may be the CBR value measured by the UE in (logical) time slot #(NX) (in a resource pool). For example, the X value may be configured differently or independently for the UE for each SL communication-related parameter set (e.g., SCS). For example, as the SCS value increases, the X value may be configured to a relatively larger value for the UE.

[0229] For example, Table 8 shows an example of the relationship between SCS and X value.

[0230] [Table 8]

[0231] <![CDATA[SCS(15*2 μ )]]> Congestion control processing time X [time slot] 15kHz(μ=0) 2 30kHz(μ=1) 2 60kHz(μ=2) 4 120kHz(μ=3) 8

[0232] For example, Table 9 shows an example of the relationship between SCS and X value.

[0233] [Table 9]

[0234] <![CDATA[SCS(15*2 μ )]]> Congestion control processing time X [time slot] 15kHz(μ=0) 2 30kHz(μ=1) 2 60kHz(μ=2) 8 120kHz(μ=3) 16

[0235] For example, as the SCS value increases, the X value may be configured to a relatively small value for the UE. For example, the X value may be configured for the UE for each resource pool, without considering the SL communication related parameters. For example, the X value may be configured for the UE for each service type. For example, the X value may be configured for the UE for each service priority. For example, the X value may be configured for the UE for each QoS requirement. For example, X may be 2. For example, the X value may be configured for the UE for each resource pool related congestion level.

[0236] Based on the embodiments of the present disclosure, NZP CSI-RS related configuration information and / or CSI-IM related configuration information may be configured between UEs. For example, NZP CSI-RS related configuration information and / or CSI-IM related configuration information may be sent / received between multiple UEs. For example, NZP CSI-RS related configuration information and / or CSI-IM related configuration information may be sent / received between multiple UEs via PC5 RRC signaling. For example, NZP CSI-RS related configuration information and / or CSI-IM related configuration information may include at least one of CSI-RS related resource pattern information, CSI-RS related resource pattern number information, CSI-RS related antenna port information, and / or CSI-RS related antenna port number information.

[0237] As described above, if NZP CSI-RS related configuration information and / or CSI-IM related configuration information is configured between multiple UEs, ambiguity may occur between the configurations. In this article, for example, in order to solve the above problem, the UE can send by disabling NZP CSI-RS and / or CSI-IM. For example, the sending UE can disable NZP CSI-RS and / or CSI-IM in SCI and send it to the receiving UE.

[0238] For example, if the transmitting UE sends / configures NZP CSI-RS related configuration information and / or CSI-IM related configuration information to the receiving UE through PC5-RRC signaling, the transmitting UE can send a TB including PC5 RRC configuration to the receiving UE without NZP CSI-RS and / or CSI-IM. For example, if the transmitting UE fails to send a TB more than a pre-configured number of times, the transmitting UE can disable NZP CSI-RS and / or CSI-IM and send it to the receiving UE.

[0239] For example, if the sending UE fails to send a TB more than a preconfigured number of times, the sending UE may disable the NZP CSI-RS and / or CSI-IM in the SCI and send it to the receiving UE. For example, if the sending UE receives a NACK for a TB from the receiving UE more than a preconfigured number of times, the sending UE may disable the NZP CSI-RS and / or CSI-IM in the SCI and send it to the receiving UE. For example, if the sending UE receives a NACK for a TB from the receiving UE more than a preconfigured number of times, the sending UE may disable the NZP CSI-RS and / or CSI-IM in the SCI and send it to the receiving UE. For example, the base station / network may configure or preconfigure information related to the preconfigured number of times to the sending UE. For example, the preconfigured number of times may be predefined in the sending UE.

[0240] For example, the transmitting UE may determine whether to disable NZP CSI-RS and / or CSI-IM, and the transmitting UE may disable NZP CSI-RS and / or CSI-IM based on the determination and send it to the receiving UE. For example, the transmitting UE may determine whether to disable NZP CSI-RS and / or CSI-IM in SCI, and the transmitting UE may disable NZP CSI-RS and / or CSI-IM in SCI based on the determination and send it to the receiving UE.

[0241] Based on the embodiments of the present disclosure, the UE may send / signal information through the first SCI (e.g., PSCCH) to inform the UE type or UE (sub) group information that needs to receive / decode information related to the message / packet on the PSSCH related / scheduled by the first SCI. For example, the UE may send / signal information through the first SCI (e.g., PSCCH) to inform the UE type or UE (sub) group information that needs to receive / decode the second SCI related / scheduled by the first SCI. For example, the UE may send / signal information through the second SCI to inform the UE type or UE (sub) group information that needs to receive / decode information related to the message / packet on the PSSCH related / scheduled by the second SCI. For example, the UE type may include pedestrian UEs and / or vehicle UEs.

[0242] For example, the field for sending information may be a pre-configured (partial) reserved bit in the first SCI. For example, the field for sending information may be a (partial) reserved bit of a pre-configured size in the first SCI. For example, the UE may send / signal information by using the pre-configured (partial) reserved bit in the first SCI.

[0243] For example, if the UE transmits only some bits (e.g., X) of the L1 ID in the first SCI, the field in which the information is transmitted may be the remaining bits (e.g., YX) except for the X bits from the bits required for the entire L1 ID transmission (e.g., Y). For example, if the UE transmits only some bits (e.g., X) of the L1 ID in the first SCI, the UE may transmit / signal the information by using the remaining bits (e.g., YX) except for the X bits from the bits required for the entire L1 ID transmission (e.g., Y). For example, the L1 ID may include the L1 destination ID and / or the L1 source ID.

[0244] For example, the UE may send / signal information about the (target) UE type via the first SCI. For example, the (target) UE type may be a UE type that needs to attempt to receive / decode message / packet information on a PSSCH associated / scheduled with the first SCI. For example, the (target) UE type may be a UE type that needs to attempt to receive / decode a second SCI associated / scheduled with the first SCI. For example, the UE type may include pedestrian UEs and / or vehicle UEs.

[0245] For example, the UE may send / signal information about the (sub)group via the first SCI. For example, the (sub)group may be a (sub)group in a (target) UE group identified by a (L1 or L2) destination ID. In this context, for example, if the above rules are applied, battery / power consumption sensitive UEs or UEs with limited (RF) capabilities (e.g., pedestrian UEs) may be prevented from performing excessive / meaningless decoding attempts on message / packet information and / or the second SCI on the PSSCH that is not relevant or of no interest to them.

[0246] For example, the UE may send information related to the SL mode through a preconfigured reserved bit in a first SCI (e.g., PSCCH). For example, the UE may be configured to send information related to the SL mode through a preconfigured reserved bit in a first SCI (e.g., PSCCH). For example, the UE may send information related to the SL mode through a preconfigured reserved bit in a second SCI. For example, the UE may be configured to send information related to the SL mode through a preconfigured reserved bit in a second SCI. For example, the reserved bit may have a preconfigured size. For example, the information related to the SL mode may include information about the SL mode related to resource selection for SL transmission of the UE. For example, the information related to the SL mode may include mode 1 related information and / or mode 2 related information.

[0247] For example, the UE may send information related to the sensing type through a reserved bit preconfigured in the first SCI (e.g., PSCCH). For example, the UE may be configured to send information related to the sensing type through a reserved bit preconfigured in the first SCI (e.g., PSCCH). For example, the UE may send information related to the sensing type through a reserved bit preconfigured in the second SCI. For example, the UE may be configured to send information related to the sensing type through a reserved bit preconfigured in the second SCI. For example, the information related to the sensing type may include information about the sensing type used by the UE to select a transmission resource. For example, the information related to the sensing type may include at least one of partial sensing, full sensing and / or no sensing. For example, partial sensing may include sensing performed by a UE that is sensitive to battery / power consumption or a UE with limited (RF) capabilities only in a preconfigured partial time domain. For example, a UE that is sensitive to battery / power consumption or a UE with limited (RF) capabilities may include a pedestrian UE. For example, full sensing may include sensing performed in a relatively long time domain by a UE that is not sensitive to battery / power consumption or a UE that has relatively good (RF) capabilities compared to a UE that performs partial sensing. For example, UEs that are not sensitive to battery / power consumption or UEs with relatively good (RF) capabilities may include vehicular UEs. For example, sensing-free may include randomly selecting resources without sensing operation of the UE.

[0248] For example, in order to give priority to protecting transmission based on a specific mode (e.g., mode 1) rather than transmission based on another mode (e.g., mode 2), the UE may send information related to the SL mode. For example, if the UE performs a resource exclusion operation and / or a resource selection operation, in order to give priority to protecting transmission based on a specific mode (e.g., mode 1) rather than transmission based on another mode (e.g., mode 2), the UE may send information related to the SL mode. For example, transmission based on mode 1 may have a relatively higher priority than transmission based on mode 2.

[0249] For example, in order to give priority to protecting transmission based on a specific sensing type rather than transmission based on another sensing type, the UE may send information related to the sensing type. For example, if the UE performs a resource exclusion operation and / or a resource selection operation, in order to give priority to protecting transmission based on a specific sensing type rather than transmission based on another sensing type, the UE may send information related to the sensing type. For example, transmission based on partial sensing may have a relatively higher priority than transmission based on full sensing.

[0250] Based on the embodiments of the present disclosure, in SL communication, a precoding resource block group may be supported and / or defined according to the rules described below. For ease of description, a precoding resource block group may be referred to as a PRG. For example, a PRG may be a resource block group to which the same precoding is applied.

[0251] For example, the TX UE may send / signal information related to the PRG size for PSSCH transmission to the RX UE via the SCI. For example, the SCI may be a first SCI. For example, the TX UE may piggyback a second SCI on the PSSCH and send it. For example, the TX UE may send the second SCI via the PSSCH.

[0252] For example, the TX UE may send / signal information related to the PRG size for PSSCH transmission to the RX UE via the second SCI format indicator / information. For example, the TX UE may send / signal information related to the PRG size for PSSCH transmission to the RX UE via the second SCI format indicator / information in the first SCI.

[0253] For example, information related to the PRG size used by the TX UE for PSSCH transmission can be determined / understood by a pre-configured rule (implicitly). For example, the RX UE or TX UE can determine / obtain information related to the PRG size used by the TX UE for PSSCH transmission based on a pre-configured rule (implicitly).

[0254] For example, the TX UE may select / determine a PRG size value among candidate values ​​associated with a PRG size pre-configured specifically for a resource pool. For example, the PRG size value may be determined / obtained by a pre-configured rule (implicitly). Specifically, for example, the RX UE or TX UE may determine / obtain a PRG size value used by the TX UE for PSSCH transmission based on a pre-configured rule (implicitly).

[0255] For example, if the PRG size value used by the TX UE for PSSCH transmission is (implicitly) determined / obtained based on a pre-configured rule, the (optional) PRG size (candidate) value of the TX UE or RX UE may be configured / restricted differently or independently based on the number of subchannels used for PSSCH transmission. For example, if the PRG size value used by the TX UE for PSSCH transmission is (implicitly) determined / obtained based on a pre-configured rule, the (optional) PRG size (candidate) value of the TX UE or RX UE may be configured / restricted differently or independently based on the MCS value used for PSSCH transmission. For example, if the PRG size value used by the TX UE for PSSCH transmission is (implicitly) determined / obtained based on a pre-configured rule, the (optional) PRG size (candidate) value of the TX UE or RX UE may be configured / restricted differently or independently based on the rank value used for PSSCH transmission. For example, if the PRG size value used by the TX UE for PSSCH transmission is (implicitly) determined / obtained based on a pre-configured rule, the (optional) PRG size (candidate) value of the TX UE or RX UE may be configured / restricted differently or independently based on the number / index value of the DMRS antenna ports used for PSSCH transmission. For example, if the PRG size value used by the TX UE for PSSCH transmission is (implicitly) determined / obtained based on a pre-configured rule, the (optional) PRG size (candidate) value of the TX UE or RX UE may be configured / restricted differently or independently based on the congestion level (e.g., CBR) (in the resource pool). For example, if the PRG size value used by the TX UE for PSSCH transmission is (implicitly) determined / obtained based on a pre-configured rule, the (optional) PRG size (candidate) value of the TX UE or RX UE may be configured / restricted differently or independently based on the type of service sent by the TX UE. For example, if the PRG size value used by the TX UE for PSSCH transmission is (implicitly) determined / obtained based on a pre-configured rule, the (optional) PRG size (candidate) value of the TX UE or RX UE may be configured / restricted differently or independently based on the priority of the service sent by the TX UE. For example, if the PRG size value used by the TX UE for PSSCH transmission is (implicitly) determined / obtained based on a pre-configured rule, the (optional) PRG size (candidate) value of the TX UE or RX UE may be configured / restricted differently or independently based on the QoS requirements (e.g., reliability and / or latency) of the service sent by the TX UE. For example, if the PRG size value used by the TX UE for PSSCH transmission is (implicitly) determined / obtained based on a pre-configured rule, the (optional) PRG size (candidate) value of the TX UE or RX UE may be configured / restricted differently or independently based on the speed of the TX UE and / or the speed of the RX UE.For example, the speed may include an absolute speed or a relative speed. For example, if the PRG size value used by the TX UE for PSSCH transmission is determined / obtained based on a pre-configured rule (implicitly), the (optional) PRG size (candidate) value of the TX UE or RX UE may be configured / restricted differently or independently based on the broadcast type of the TXUE. For example, the broadcast type may include at least one of unicast, groupcast and / or broadcast. For example, if the PRG size value used by the TX UE for PSSCH transmission is determined / obtained based on a pre-configured rule (implicitly), the (optional) PRG size (candidate) value of the TX UE or RX UE may be configured / restricted differently or independently based on the number of RBs included in the subchannel.

[0256] For example, if the TX UE selects / determines the PRG size value from the candidate values ​​related to the PRG size, the (optional) PRG size (candidate) value of the TX UE may be configured / restricted differently or independently based on the number of subchannels used for PSSCH transmission. For example, if the TX UE selects / determines the PRG size value from the candidate values ​​related to the PRG size, the (optional) PRG size (candidate) value of the TX UE may be configured / restricted differently or independently based on the MCS value used for PSSCH transmission. For example, if the TX UE selects / determines the PRG size value from the candidate values ​​related to the PRG size, the (optional) PRG size (candidate) value of the TX UE may be configured / restricted differently or independently based on the rank value used for PSSCH transmission. For example, if the TX UE selects / determines the PRG size value from the candidate values ​​related to the PRG size, the (optional) PRG size (candidate) value of the TX UE may be configured / restricted differently or independently based on the number / index value of DMRS antenna ports used for PSSCH transmission. For example, if the TX UE selects / determines the PRG size value from the candidate values ​​related to the PRG size, the (optional) PRG size (candidate) value of the TX UE may be configured / restricted differently or independently based on the congestion level (e.g., CBR) (in the resource pool). For example, if the TX UE selects / determines the PRG size value from the candidate values ​​related to the PRG size, the (optional) PRG size (candidate) value of the TX UE may be configured / restricted differently or independently based on the type of service sent by the TX UE. For example, if the TX UE selects / determines the PRG size value from the candidate values ​​related to the PRG size, the (optional) PRG size (candidate) value of the TX UE may be configured / restricted differently or independently based on the priority of the service sent by the TX UE. For example, if the TX UE selects / determines the PRG size value from the candidate values ​​related to the PRG size, the (optional) PRG size (candidate) value of the TX UE may be configured / restricted differently or independently based on the QoS requirements (e.g., reliability and / or latency) of the service sent by the TX UE. For example, if the TX UE selects / determines the PRG size value from candidate values ​​related to the PRG size, the (optional) PRG size (candidate) value of the TX UE may be configured / limited differently or independently based on the speed of the TX UE and / or the speed of the RX UE. For example, the speed may include an absolute speed or a relative speed. For example, if the TX UE selects / determines the PRG size value from candidate values ​​related to the PRG size, the (optional) PRG size (candidate) value of the TX UE may be configured / limited differently or independently based on the broadcast type of the TX UE. For example, the broadcast type may include at least one of unicast, multicast, and / or broadcast.For example, if the TX UE selects / determines a PRG size value from candidate values ​​related to the PRG size, the (optional) PRG size (candidate) value of the TX UE may be differently or independently configured / limited based on the number of RBs included in the subchannel.

[0257] For example, the TX UE may apply the PRG size determined according to the above embodiment to each subchannel unit (in a time slot) (independently).For example, the TX UE may apply the PRG size determined according to the above embodiment to (all) RBs regardless of the subchannel (in a time slot).

[0258] For example, in the case where the TX UE applies the PRG size for each subchannel (in one slot), after the TX UE applies the PRG size in the subchannel, if the number of remaining RBs is less than the PRG size, the TX UE may determine / consider applying the same precoding as other RBs in the subchannel to the remaining RBs. In addition, for example, the TX UE may apply the same precoding as other RBs in the subchannel to the remaining RBs, and the TX UE may send SL information to the RX UE on the remaining RBs.

[0259] For example, in the case where the TX UE applies the PRG size for each subchannel (in one slot), after the TX UE applies the PRG size in the subchannel, if the number of remaining RBs is less than the PRG size, the TX UE may determine / consider not applying the same precoding as other RBs in the subchannel to the remaining RBs. In addition, for example, the TX UE may not apply the same precoding as other RBs in the subchannel to the remaining RBs, and the TX UE may send SL information to the RX UE on the remaining RBs.

[0260] For example, in the case where the TX UE applies the PRG size to (all) RBs regardless of the subchannels (in one slot), after the TX UE applies the PRG size to the RBs (in one slot), if the number of remaining RBs is less than the PRG size, the TX UE may determine / consider applying the same precoding as other RBs to the remaining RBs. In addition, for example, the TX UE may apply the same precoding as other RBs to the remaining RBs, and the TX UE may send SL information to the RX UE on the remaining RBs.

[0261] For example, in the case where the TX UE applies the PRG size to (all) RBs regardless of the subchannels (in one slot), after the TX UE applies the PRG size to the RBs (in one slot), if the number of remaining RBs is less than the PRG size, the TX UE may determine / consider not applying the same precoding as other RBs to the remaining RBs. In addition, for example, the TX UE may not apply the same precoding as other RBs to the remaining RBs, and the TX UE may send SL information to the RX UE on the remaining RBs.

[0262] For example, if the size of the subchannel is less than or equal to a preconfigured threshold, the TX UE may apply the PRG for each subchannel size unit. For example, if the size of the subchannel is greater than or equal to a preconfigured threshold, the TX UE may apply the PRG for each preconfigured RB number.

[0263] For example, if the size of the subchannel is less than or equal to a preconfigured threshold, the TX UE may apply the PRG for each preconfigured number of RBs. For example, if the size of the subchannel is greater than or equal to a preconfigured threshold, the TX UE may apply the PRG for each subchannel size unit.

[0264] For example, if the number of subchannels used by the TX UE for PSSCH transmission is equal to or less than a preconfigured threshold, the TX UE may apply the PRG for each subchannel size unit. For example, if the number of subchannels used by the TX UE for PSSCH transmission is greater than or equal to a preconfigured threshold, the TX UE may apply the PRG for each preconfigured number of RBs.

[0265] For example, if the number of subchannels used by the TX UE for PSSCH transmission is less than or equal to a preconfigured threshold, the TX UE may apply the PRG for each preconfigured number of RBs. For example, if the number of subchannels used by the TX UE for PSSCH transmission is greater than or equal to a preconfigured threshold, the TX UE may apply the PRG for each subchannel size unit.

[0266] Based on the embodiments of the present disclosure, a (specific) relative speed-based TX parameter limit value and / or a (specific) relative speed-based TX parameter limit value range may be configured differently for the TX UE based on at least one of the priority of the service sent by the TX UE, the type of service sent by the TX UE, the QoS requirements (e.g., reliability and / or waiting time) related to the service sent by the TX UE, and / or the playback type. In addition, for example, the TX UE may send SL information to the RX UE based on the TX parameter limit value and / or the TX parameter limit value range. For example, the TX parameter limit value may include at least one of the number of retransmissions of the TX UE, the MCS value used for transmission by the TX UE, and / or the transmit power value of the TX UE. For example, the TX parameter limit range may include at least one of the range of the number of retransmissions of the TX UE, the range of the MCS value used for transmission by the TX UE, and / or the range of the transmit power value of the TX UE.

[0267] For example, a (specific) absolute speed-based TX parameter limit value and / or a (specific) absolute speed-based TX parameter limit value range may be configured differently for the TX UE based on at least one of a priority of a service sent by the TX UE, a type of service sent by the TX UE, a QoS requirement (e.g., reliability and / or latency) associated with the service sent by the TX UE, and / or a play type. In addition, for example, the TX UE may send SL information to the RX UE based on the TX parameter limit value and / or the TX parameter limit value range. For example, the TX parameter limit value may include at least one of the number of retransmissions of the TX UE, the MCS value used for transmission by the TX UE, and / or the transmit power value of the TX UE. For example, the TX parameter limit range may include at least one of a range of the number of retransmissions of the TX UE, a range of the MCS value used for transmission by the TX UE, and / or the transmit power value of the TX UE.

[0268] For example, the relative speed value / range of the application-specific TX parameter limit value / range may be configured differently for the TX UE based on at least one of the priority of the service sent by the TX UE, the type of service sent by the TX UE, the QoS requirement (e.g., reliability and / or latency) associated with the service sent by the TX UE, and / or the playout type. For example, the absolute speed value / range of the application-specific TX parameter limit value / range may be configured differently for the TX UE based on at least one of the priority of the service sent by the TX UE, the type of service sent by the TX UE, the QoS requirement (e.g., reliability and / or latency) associated with the service sent by the TX UE, and / or the playout type.

[0269] For example, the TX UE may be configured differently for the TX UE based on at least one of a priority of a service sent by the TX UE, a type of service sent by the TX UE, a QoS requirement (e.g., reliability and / or latency) associated with the service sent by the TX UE, and / or a playback type, as to which speed the TX UE applies the TX parameter restriction based on a relative speed or an absolute speed. For example, based on at least one of a priority of a service sent by the TX UE, a type of service sent by the TX UE, a QoS requirement (e.g., reliability and / or latency) associated with the service sent by the TX UE, and / or a playback type, the TX UE may apply / determine a TX parameter restriction value / range based on a relative speed. For example, based on at least one of a priority of a service sent by the TX UE, a type of service sent by the TX UE, a QoS requirement (e.g., reliability and / or latency) associated with the service sent by the TX UE, and / or a playback type, the TX UE may apply / determine a TX parameter restriction value / range based on an absolute speed.

[0270] For example, based on at least one of a priority of a service sent by the TX UE, a type of service sent by the TX UE, a QoS requirement (e.g., reliability and / or latency) related to the service sent by the TX UE, and / or a playback type, whether the TX UE limits the TX parameter based on absolute speed may be configured differently for the TX UE. For example, based on at least one of a priority of a service sent by the TX UE, a type of service sent by the TX UE, a QoS requirement (e.g., reliability and / or latency) related to the service sent by the TX UE, and / or a playback type, the TX UE may determine whether to limit the TX parameter based on absolute speed.

[0271] For example, based on at least one of a priority of a service sent by the TX UE, a type of service sent by the TX UE, a QoS requirement (e.g., reliability and / or latency) related to the service sent by the TX UE, and / or a play type, whether the TX UE limits the TX parameter based on the relative speed may be configured differently for the TX UE. For example, based on at least one of a priority of a service sent by the TX UE, a type of service sent by the TX UE, a QoS requirement (e.g., reliability and / or latency) related to the service sent by the TX UE, and / or a play type, the TX UE may determine whether to limit the TX parameter based on the relative speed.

[0272] For example, based on at least one of a priority of a service sent by the TX UE, a type of service sent by the TX UE, a QoS requirement (e.g., reliability and / or latency) related to the service sent by the TX UE, and / or a playback type, whether the TX UE limits the TX parameter without considering the absolute speed may be configured differently for the TX UE. For example, based on at least one of a priority of a service sent by the TX UE, a type of service sent by the TX UE, a QoS requirement (e.g., reliability and / or latency) related to the service sent by the TX UE, and / or a playback type, the TX UE may determine whether to limit the TX parameter without considering the absolute speed.

[0273] For example, based on at least one of a priority of a service sent by the TX UE, a type of service sent by the TX UE, a QoS requirement (e.g., reliability and / or latency) related to the service sent by the TX UE, and / or a playout type, whether the TX UE limits the TX parameter without considering the relative speed may be configured differently for the TX UE. For example, based on at least one of a priority of a service sent by the TX UE, a type of service sent by the TX UE, a QoS requirement (e.g., reliability and / or latency) related to the service sent by the TX UE, and / or a playout type, the TX UE may determine whether to limit the TX parameter without considering the relative speed.

[0274] For example, based on at least one of a priority of a service sent by the TX UE, a type of service sent by the TX UE, a QoS requirement (e.g., reliability and / or latency) related to the service sent by the TX UE, and / or a playout type, whether the TX UE limits the TX parameter may be configured differently for the TX UE. For example, based on at least one of a priority of a service sent by the TX UE, a type of service sent by the TX UE, a QoS requirement (e.g., reliability and / or latency) related to the service sent by the TX UE, and / or a playout type, the TX UE may determine whether to limit the TX parameter.

[0275] For example, in the case of a service with relatively high reliability requirements, a TX parameter restriction based on relative speed may be configured for the TX UE. For example, the TX UE may determine / apply a TX parameter restriction value / range based on the relative speed, and the TX UE may send SL information to the RX UE based on the TX parameter restriction value / range.

[0276] For example, in the case of a service with SL HARQ feedback enabled, a TX parameter restriction based on relative speed may be configured for the TX UE. For example, the TX UE may determine / apply a TX parameter restriction value / range based on the relative speed, and the TX UE may send SL information to the RX UE based on the TX parameter restriction value / range.

[0277] For example, in the case of a unicast service, a TX parameter limit based on relative speed may be configured for the TX UE. For example, a unicast service may be a service that the TX UE sends to the RX UE via a PC5 RRC connection. For example, the TX UE may determine / apply a TX parameter limit value / range based on relative speed, and the TX UE may send SL information to the RX UE based on the TX parameter limit value / range.

[0278] For example, in the case of a multicast service, a TX parameter limit based on relative speed may be configured for the TX UE. For example, the TX UE may determine / apply a TX parameter limit value / range based on the relative speed, and the TX UE may send SL information to the RX UE based on the TX parameter limit value / range.

[0279] For example, in the case of a service with relatively high reliability requirements, a TX parameter limit based on absolute speed may be configured for the TX UE. For example, the TX UE may determine / apply a TX parameter limit value / range based on the absolute speed, and the TX UE may send SL information to the RX UE based on the TX parameter limit value / range.

[0280] For example, in the case of a service with SL HARQ feedback enabled, a TX parameter limit based on absolute speed may be configured for the TX UE. For example, the TX UE may determine / apply a TX parameter limit value / range based on the absolute speed, and the TX UE may send SL information to the RX UE based on the TX parameter limit value / range.

[0281] For example, in the case of a unicast service, a TX parameter limit based on absolute speed may be configured for the TX UE. For example, a unicast service may be a service that the TX UE sends to the RX UE via a PC5 RRC connection. For example, the TX UE may determine / apply a TX parameter limit value / range based on absolute speed, and the TX UE may send SL information to the RX UE based on the TX parameter limit value / range.

[0282] For example, in the case of a multicast service, a TX parameter limit based on absolute speed may be configured for the TX UE. For example, the TX UE may determine / apply a TX parameter limit value / range based on the absolute speed, and the TX UE may send SL information to the RX UE based on the TX parameter limit value / range.

[0283] For example, in the case of a service with a specific priority, if the TX parameter restriction based on the absolute speed is not configured for the TX UE, the TX UE may determine / select the TX parameter for transmitting the message related to the service with the specific priority by using the relative speed. For example, in the case of a service with a specific priority, if the TX parameter restriction based on the absolute speed is not configured for the TX UE, the TX UE may determine / select the TX parameter for transmitting the message related to the service with the specific priority by using the relative speed according to the capability of the TX UE. For example, the TX parameter may be determined / selected from a pre-configured candidate parameter set.

[0284] For example, in case of a specific type of service, if the TX parameter restriction based on the absolute speed is not configured for the TX UE, the TX UE may determine / select the TX parameter for transmitting the message related to the specific type of service by using the relative speed. For example, in case of a specific type of service, if the TX parameter restriction based on the absolute speed is not configured for the TX UE, the TX UE may determine / select the TX parameter for transmitting the message related to the specific type of service by using the relative speed according to the capability of the TX UE. For example, the TX parameter may be determined / selected from a pre-configured candidate parameter set.

[0285] For example, in the case of a service with a specific QoS requirement, if the TX parameter restriction based on the absolute speed is not configured for the TX UE, the TX UE may determine / select the TX parameters for transmitting the message related to the service with the specific QoS requirement by using the relative speed. For example, in the case of a service with a specific QoS requirement, if the TX parameter restriction based on the absolute speed is not configured for the TX UE, the TX UE may determine / select the TX parameters for transmitting the message related to the service with the specific QoS requirement by using the relative speed according to the capability of the TX UE. For example, the TX parameters may be determined / selected from a pre-configured candidate parameter set.

[0286] For example, in the case of a service related to a specific playback type, if the TX parameter restriction based on the absolute speed is not configured for the TX UE, the TX UE may determine / select a TX parameter for transmitting a message related to the service related to the specific playback type by using the relative speed. For example, in the case of a service related to a specific playback type, if the TX parameter restriction based on the absolute speed is not configured for the TX UE, the TX UE may determine / select a TX parameter for transmitting a message related to the service related to the specific playback type by using the relative speed according to the capability of the TX UE. For example, the TX parameter may be determined / selected from a pre-configured candidate parameter set.

[0287] For example, if the TX UE is configured to limit the TX parameters without considering the absolute speed, the TX UE may determine / select the TX parameters for transmitting the message by using the relative speed. For example, the message may include at least one of a message related to a service having a specific priority, a message related to a specific type of service, a message related to a service having a specific QoS requirement, and / or a service related to a specific playback type.

[0288] For example, if the TX UE is not configured to limit the TX parameters, the TX UE may determine / select the TX parameters for transmitting the message by using the relative speed. For example, the message may include at least one of a message related to a service having a specific priority, a message related to a specific type of service, a message related to a service having a specific QoS requirement, and / or a service related to a specific playback type.

[0289] For example, typically, based on the TX UE's playback type (e.g., unicast, groupcast, broadcast) and / or whether SL HARQ feedback is enabled, the priority of the (target) service, the type of (target) service, and / or the QoS requirements of the (target) service may be different. Therefore, based on the TX UE's playback type and / or whether SL HARQ feedback is performed / applied for the service sent by the TX UE, TX parameter restrictions may be applied / configured / implemented for the TX UE.

[0290] Based on an embodiment of the present disclosure, the number of antenna ports (APs) associated with the PT-RS (sent by the TX UE on the PSSCH) may be less than the number of APs associated with the PSSCH. For example, the number of APs used by the TX UE to send the PT-RS may be less than the number of APs used by the TX UE to send the PSSCH. In the above case, the TX UE may not allocate power to the PT-RS RE on a specific / partial (PSSCH) layer / AP. For example, the PT-RS RE may be an RE through which the PT-RS is transmitted. In this article, for example, if the TX UE allocates / distributes the power spectral density (PSD) on the zero-power PT-RS RE to the data RE positioned in FDM form with the zero-power PT-RS RE (within the same symbol), the PSD may be different between the first symbol (e.g., the symbol to which the PT-RS and data are mapped) and the second symbol adjacent to the first symbol (e.g., the symbol to which only the data is mapped). Therefore, an additional power transient period may be required. Herein, for example, in order to alleviate the above-mentioned problem, the TX UE may be configured not to allocate / distribute the PSD on the zero-power PT-RS RE to the data RE positioned in the form of FDM with the zero-power PT-RS RE (within the same symbol). For example, the TX UE may not allocate / distribute the PSD on the zero-power PT-RS RE to the data RE positioned in the form of FDM with the zero-power PT-RS RE (within the same symbol). For example, the TX UE may determine / interpret that data mapping is virtually performed on the zero-power PT-RS RE, and the TX UE may not allocate / distribute the PSD on the zero-power PT-RS RE to the data RE positioned in the form of FDM with the zero-power PT-RS RE (within the same symbol).

[0291] For example, based on whether the UE performs a chain-based resource reservation operation, the UE may determine whether to apply at least one of the rules proposed in the various embodiments of the present disclosure. For example, based on whether the UE performs a block-based resource reservation operation, the UE may determine whether to apply at least one of the rules proposed in the various embodiments of the present disclosure. For example, based on whether the UE performs a blind retransmission operation, the UE may determine whether to apply at least one of the rules proposed in the various embodiments of the present disclosure. For example, based on whether the UE performs a retransmission operation based on SL HARQ feedback, the UE may determine whether to apply at least one of the rules proposed in the various embodiments of the present disclosure. For example, based on whether the UE performs a CG-based resource selection / reservation operation, the UE may determine whether to apply at least one of the rules proposed in the various embodiments of the present disclosure. For example, based on whether the UE performs a DG-based resource selection / reservation operation, the UE may determine whether to apply at least one of the rules proposed in the various embodiments of the present disclosure.

[0292] For example, it is possible to configure UE differently or limitedly for each resource pool whether to apply at least one of the rules proposed in the various embodiments of the present disclosure to UE. For example, it is possible to configure UE differently or limitedly for each service type whether to apply at least one of the rules proposed in the various embodiments of the present disclosure to UE. For example, it is possible to configure UE differently or limitedly for each service priority whether to apply at least one of the rules proposed in the various embodiments of the present disclosure to UE. For example, it is possible to configure UE differently or limitedly for each playback type whether to apply at least one of the rules proposed in the various embodiments of the present disclosure to UE. For example, the playback type may include at least one of unicast, multicast and / or broadcast. For example, it is possible to configure UE differently or limitedly for each destination UE whether to apply at least one of the rules proposed in the various embodiments of the present disclosure to UE. For example, it is possible to configure UE differently or limitedly for each (L1 or L2) destination ID whether to apply at least one of the rules proposed in the various embodiments of the present disclosure to UE. For example, it is possible to configure UE differently or limitedly for each (L1 or L2) source ID whether to apply at least one of the rules proposed in the various embodiments of the present disclosure to UE. For example, the UE may be configured differently or limitedly for each (service) QoS parameter to determine whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure. For example, the (service) QoS parameter may include at least one of a reliability-related parameter, a waiting time-related parameter, and / or a (target) block error rate (BLER)-related parameter. For example, the UE may be configured differently or limitedly for each (resource pool) congestion level to determine whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure. For example, the UE may be configured differently or limitedly for each SL mode type to determine whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure. For example, the SL mode type may include SL mode 1 and / or SL mode 2. For example, the UE may be configured differently or limitedly for each license type to determine whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure. For example, the license type may include CG and / or DG. For example, the UE may be configured differently or limitedly for each packet / message (e.g., TB) size to determine whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure. For example, whether the UE applies at least one of the rules proposed in various embodiments of the present disclosure may be configured differently or limitedly for each number of subchannels used by the UE for PSSCH transmission. For example, whether the UE applies at least one of the rules proposed in various embodiments of the present disclosure may be configured differently or limitedly for each number of RBs used by the UE for PSCCH transmission.For example, whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure may be configured differently or limitedly for each number of RBs included in (one) subchannel. For example, whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure may be configured differently or limitedly for each number of subchannels included in a resource pool and / or each number of RBs included in a resource pool. For example, based on whether the (one) subchannel size and the PSCCH (frequency) resource size are the same, whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure may be configured differently or limitedly. For example, based on whether a (semi-)static codebook is configured for the UE, whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure may be configured differently or limitedly.

[0293] For example, based on whether the UE performs a chain-based resource reservation operation, parameters can be configured differently or limitedly for the UE. For example, based on whether the UE performs a block-based resource reservation operation, parameters can be configured differently or limitedly for the UE. For example, based on whether the UE performs a blind retransmission operation, parameters can be configured differently or limitedly for the UE. For example, based on whether the UE performs a retransmission operation based on SL HARQ feedback, parameters can be configured differently or limitedly for the UE. For example, based on whether the UE performs a CG-based resource selection / reservation operation, parameters can be configured differently or limitedly for the UE. For example, based on whether the UE performs a DG-based resource selection / reservation operation, parameters can be configured differently or limitedly for the UE.

[0294] For example, parameters may be configured differently or limitedly for each resource pool for UE. For example, parameters may be configured differently or limitedly for each service type for UE. For example, parameters may be configured differently or limitedly for each service priority for UE. For example, parameters may be configured differently or limitedly for each playback type for UE. For example, the playback type may include at least one of unicast, multicast and / or broadcast. For example, parameters may be configured differently or limitedly for each destination UE for UE. For example, parameters may be configured differently or limitedly for UE for each (L1 or L2) destination ID. For example, parameters may be configured differently or limitedly for UE for each (L1 or L2) source ID. For example, parameters may be configured differently or limitedly for UE for each (service) QoS parameter. For example, (service) QoS parameters may include at least one of reliability-related parameters, latency-related parameters and / or (target) BLER-related parameters. For example, parameters may be configured differently or limitedly for UE for each (resource pool) congestion level. For example, parameters may be configured differently or limitedly for UE for each SL mode type. For example, the SL mode type may include SL mode 1 and / or SL mode 2. For example, parameters may be configured differently or limitedly for the UE for each grant type. For example, the grant type may include CG and / or DG. For example, parameters may be configured differently or limitedly for the UE for each packet / message (e.g., TB) size. For example, parameters may be configured differently or limitedly for the UE for each number of subchannels used by the UE for PSSCH transmission. For example, parameters may be configured differently or limitedly for the UE for each number of RBs used by the UE for PSCCH transmission. For example, parameters may be configured differently or limitedly for the UE for each number of RBs included in (one) subchannel. For example, UE parameters may be configured differently or limitedly for each number of subchannels included in a resource pool and / or each number of RBs included in a resource pool. For example, based on whether the (one) subchannel size and the PSCCH (frequency) resource size are the same, parameters may be configured differently or limitedly. For example, based on whether a (semi-)static codebook is configured for the UE, parameters may be configured differently or limitedly.

[0295] Fig.16 A method for a first device to transmit an NZP CSI-RS and / or CSI-IM according to an embodiment of the present disclosure is shown. Fig.16 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0296] Reference Fig.16, in step S1610, the first device may map the NZP CSI-RS and / or CSI-IM to the first symbol. For example, the first device may map the NZP CSI-RS and / or CSI-IM to the first symbol based on various embodiments of the present disclosure. For example, the first device may determine whether to map at least one of the data information, the second SCI, and / or the PT-RS to the RE positioned in the form of FDM with the first symbol to which the NZP CSI-RS and / or CSI-IM are mapped. For example, the first device may determine whether to map at least one of the data information, the second SCI, and / or the PT-RS to the RE positioned in the form of FDM with the first symbol to which the NZP CSI-RS and / or CSI-IM are mapped based on various embodiments of the present disclosure. In step S1620, the first device may send the NZP CSI-RS and / or CSI-IM to the second device. For example, the first device may send the NZP CSI-RS and / or CSI-IM to the second device based on various embodiments of the present disclosure.

[0297] Fig.17 A method for obtaining channel state information based on NZP CSI-RS and / or CSI-IM by a second device according to an embodiment of the present disclosure is shown. Fig.17 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0298] Reference Fig.17 , in step S1710, the second device may receive the NZP CSI-RS and / or CSI-IM on the first symbol. For example, the NZP CSI-RS and / or CSI-IM may be mapped on the first symbol. For example, based on various embodiments of the present disclosure, the NZP CSI-RS and / or CSI-IM may be mapped to the first symbol by the first device. For example, the first device may determine whether to map at least one of the data information, the second SCI and / or PT-RS to an RE positioned in the form of FDM with the first symbol to which the NZP CSI-RS and / or CSI-IM are mapped. For example, the first device may determine whether to map at least one of the data information, the second SCI and / or PT-RS to an RE positioned in the form of FDM with the first symbol to which the NZP CSI-RS and / or CSI-IM are mapped based on various embodiments of the present disclosure. In step S1720, the second device may measure / obtain / calculate the channel state information between the first device and the second device based on the NZP CSI-RS and / or CSI-IM. In addition, the second device may send channel state information to the first device.

[0299] Fig.18 A method for a first device to perform wireless communication based on an embodiment of the present disclosure is shown. Fig.18The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0300] Reference Fig.18 , in step S1810, the first device may measure a channel busy rate (CBR) for a resource pool in a first time slot. In step S1820, the first device may determine a power of a physical sidelink shared channel (PSSCH) transmission in a second time slot based on the CBR measured in the first time slot. In step S1830, the first device may perform PSSCH transmission to the second device in the second time slot based on the power. For example, the first time slot may be a time slot N time slots before the second time slot, and N may be determined based on a subcarrier spacing (SCS) associated with the PSSCH transmission, and N may be a positive integer.

[0301] For example, the larger the SCS associated with the PSSCH transmission, the larger N may be determined. For example, the SCS may be one of 15 kHz, 30 kHz, 60 kHz, or 120 kHz.

[0302] For example, the index of the first time slot may be a value obtained by subtracting N from the index of the second time slot.

[0303] For example, the CBR may be measured for the resource pool in a time interval including a plurality of time slots before the first time slot. For example, the CBR may be measured for the resource pool in a time interval from (i) the third time slot 100 time slots before the first time slot to (ii) the fourth time slot 1 time slot before the first time slot. For example, the CBR may be measured for the resource pool in a time interval from (i) 100 ms before the first time slot to (ii) 1 ms before the first time slot.

[0304] For example, a maximum transmission power associated with PSSCH transmission may be configured for the first device for each CBR range.

[0305] For example, the size of a precoding resource block group (PRG) associated with PSSCH transmission may be configured for the first device. For example, the size of the PRG may be applied based on a resource block (RB) regardless of the subchannel. For example, the same precoding may be applied to consecutively allocated RBs included in the PRG.

[0306] In addition, for example, the first device may send information related to the sensing type of the first device to the second device. For example, the sensing type may include partial sensing or full sensing.

[0307] In addition, for example, the first device may transmit information related to the resource allocation mode of the first device to the second device.

[0308] The proposed method can be applied to devices based on various embodiments of the present disclosure. First, the processor 102 of the first device 100 can measure the channel busy rate (CBR) for the resource pool in the first time slot. In addition, the processor 102 of the first device 100 can determine the power of the physical sidelink shared channel (PSSCH) transmission in the second time slot based on the CBR measured in the first time slot. In addition, the processor 102 of the first device 100 can control the transceiver 106 to perform PSSCH transmission to the second device in the second time slot based on power. For example, the first time slot can be a time slot before N time slots starting from the second time slot, and N can be determined based on the subcarrier spacing (SCS) associated with the PSSCH transmission, and N can be a positive integer.

[0309] Based on the embodiments of the present disclosure, a first device configured to perform wireless communication may 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. For example, the one or more processors may execute instructions to perform the following operations: measure the channel busy rate (CBR) for the resource pool in the first time slot; determine the power of the physical sidelink shared channel (PSSCH) transmission in the second time slot based on the CBR measured in the first time slot; and perform PSSCH transmission to the second device in the second time slot based on the power. For example, the first time slot may be a time slot before N time slots starting from the second time slot, and N may be determined based on the subcarrier spacing (SCS) associated with the PSSCH transmission, and N may be a positive integer.

[0310] Based on an embodiment of the present disclosure, a device configured to control a first user equipment (UE) may be provided. For example, the device may include: one or more processors; and one or more memories, the one or more memories being operatively connected to the one or more processors and storing instructions. For example, the one or more processors may execute instructions to perform the following operations: measuring a channel busy rate (CBR) for a resource pool in a first time slot; determining the power of a physical sidelink shared channel (PSSCH) transmission in a second time slot based on the CBR measured in the first time slot; and performing PSSCH transmission to a second device in the second time slot based on the power. For example, the first time slot may be a time slot N time slots before the start of the second time slot, and N may be determined based on a subcarrier spacing (SCS) associated with the PSSCH transmission, and N may be a positive integer.

[0311] Based on the embodiments of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, when the instructions are executed, the first device may perform the following operations: measure the channel busy rate (CBR) for the resource pool in the first time slot; determine the power of the physical sidelink shared channel (PSSCH) transmission in the second time slot based on the CBR measured in the first time slot; and perform PSSCH transmission to the second device in the second time slot based on the power. For example, the first time slot may be a time slot N time slots before the second time slot, and N may be determined based on the subcarrier spacing (SCS) associated with the PSSCH transmission, and N may be a positive integer.

[0312] Fig.19 A method for a second device to perform wireless communication based on an embodiment of the present disclosure is shown. Fig.19 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0313] Reference Fig.19 In step S1910, the second device may receive a physical sidelink shared channel (PSSCH) from the first device in the second time slot. For example, the transmit power associated with the PSSCH may be determined by the first device based on a channel busy rate (CBR) measured for the resource pool in the first time slot, and the first time slot may be a time slot N time slots before the second time slot, and N may be determined based on a subcarrier spacing (SCS) associated with the PSSCH, and N may be a positive integer.

[0314] The proposed method can be applied to devices based on various embodiments of the present disclosure. First, the processor 202 of the second device 200 can control the transceiver 206 to receive a physical side link shared channel (PSSCH) from the first device in the second time slot. For example, the transmit power associated with the PSSCH can be determined by the first device based on a channel busy rate (CBR) measured for a resource pool in the first time slot, and the first time slot can be a time slot before N time slots starting from the second time slot, and N can be determined based on a subcarrier spacing (SCS) associated with the PSSCH, and N can be a positive integer.

[0315] Based on the embodiments of the present disclosure, a second device configured to perform wireless communication may be provided. For example, the second device may include: one or more memories storing instructions; one or more transceivers; and one or more processors, the one or more processors being 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 the following operations: receiving a physical sidelink shared channel (PSSCH) from a first device in a second time slot. For example, the transmit power associated with the PSSCH may be determined by the first device based on a channel busy rate (CBR) measured for a resource pool in a first time slot, and the first time slot may be a time slot N time slots before the second time slot, and N may be determined based on a subcarrier spacing (SCS) associated with the PSSCH, and N may be a positive integer.

[0316] Based on an embodiment of the present disclosure, a device configured to control a second user equipment (UE) may be provided. For example, the device may include: one or more processors; and one or more memories, the one or more memories being operatively connected to the one or more processors and storing instructions. For example, the one or more processors may execute instructions to perform the following operations: receiving a physical sidelink shared channel (PSSCH) from a first UE in a second time slot. For example, the transmit power associated with the PSSCH may be determined by a first device based on a channel busy rate (CBR) measured for a resource pool in a first time slot, and the first time slot may be a time slot before N time slots starting from the second time slot, and N may be determined based on a subcarrier spacing (SCS) associated with the PSSCH, and N may be a positive integer.

[0317] Based on the embodiments of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, when the instructions are executed, the second device may be caused to perform the following operations: receiving a physical side link shared channel (PSSCH) from the first device in a second time slot. For example, the transmit power associated with the PSSCH may be determined by the first device based on a channel busy rate (CBR) measured for a resource pool in a first time slot, and the first time slot may be a time slot N time slots before the second time slot, and N may be determined based on a subcarrier spacing (SCS) associated with the PSSCH, and N may be a positive integer.

[0318] Fig. 20 The process of UE reporting SL CSI based on an embodiment of the present disclosure is shown. Fig. 20 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0319] Reference Fig. 20, in step S2010, the TX UE may send a CSI-RS to the RX UE. For example, the TX UE may be a UE that triggers / requests a SL CSI report. In step S2020, the RX UE may measure the channel state between the TX UE and the RX UE based on the CSI-RS. For example, the RX UE may obtain the SL CSI based on the CSI-RS. In step S2030, the RX UE may report the SL CSI to the TX UE. For example, the SL CSI may be sent via the MAC CE. In addition, in step S2030, the RX UE may send information related to the SL CSI to the TX UE. For example, when the RX UE reports the SL CSI to the TX UE, the RX UE may report the information related to the SL CSI to the TX UE together.

[0320] For example, the information related to SL CSI may include CSI_REFINX. For example, CSI_REFINX may be information related to a (reference) resource (e.g., a time slot) for measuring SL CSI. For ease of description, a time slot for measuring SL CSI or a time slot for sending / receiving SLCSI-RS may be referred to as a SL CSI reference time slot.

[0321] For example, the information related to the SL CSI may include CSIREF_VAL. For example, CSIREF_VAL may be obtained based on Equation 1.

[0322] [Formula 1]

[0323] CSIREF_VAL = MODULO (index of SL time slot in resource pool, CSI_INDEX)

[0324] Herein, Z=MODULO(X,Y) may refer to a function for deriving a remainder obtained by dividing X by Y. For example, the index of the SL time slot in the resource pool may be the index of the SL time slot in which the SL CSI is measured. For example, the index of the SL time slot may be the index of a physical time slot. For example, the index of the SL time slot may be the index of a logical time slot.

[0325] For example, the information related to the SL CSI may include CSI_OFFVAL. For example, CSI_OFFVAL may be obtained based on Equation 2.

[0326] [Formula 2]

[0327] CSI_OFFVAL = MODULO (information related to SL time slots within the waiting time limit associated with SL CSI reporting, CSI_INDEX)

[0328] Herein, Z=MODULO(X,Y) may refer to a function for deriving a remainder obtained by dividing X by Y. For example, information related to the SL time slots within the waiting time limit associated with the SLCSI report may be a (re-indexed) index or order of the SL time slots, in which the SL CSI is measured within the waiting time limit associated with the SL CSI report. For example, the index of the SL time slot may be an index of a physical time slot. For example, the index of the SL time slot may be an index of a logical time slot. For example, CSI_OFFVAL may be interpreted as time offset information or time slot offset information between a SL CSI reference time slot (e.g., a time slot for measuring / deriving SL CSI or a time slot for receiving SLCSI-RS) and a time slot for performing SL CSI reporting. For ease of description, the waiting time limit may be referred to as CSI_LBD.

[0329] For example, the information related to the SL CSI may include CSI_QTVAL. For example, if the waiting time limit related to the SL CSI report is divided by a preconfigured quantization window unit (i.e., QT_WIN), CSI_QTVAL may be the order information or index information of the QT_WIN to which the associated SL CSI reference time slot or the time slot performing the SL CSI report belongs among the multiple divided windows.

[0330] In various embodiments of the present disclosure, the waiting time limit associated with the SL CSI report can be a time window / domain from the SLCSI-RS reception / transmission time to the waiting time budget for performing the SL CSI report. For example, the waiting time limit associated with the SLCSI report can be pre-configured for the TX UE and the RX UE. For example, the waiting time limit associated with the SL CSI report can be exchanged between the TX UE and the RX UE via PC5 RRC signaling (e.g., RRC reconfiguration sidelink message).

[0331] Table 10 shows an example of an RRC reconfiguration sidelink message.

[0332] [Table 10]

[0333]

[0334] Referring to Table 10, the RRC reconfiguration sidelink message may include sl-LatencyBoundCSI-Report-r16. For example, if sl-LatencyBoundCSI-Report-r16 indicates 10, SL CSI reporting may be requested within 10 slots starting from the slot triggering the SL CSI report (eg, the SL CSI reference slot).

[0335] In various embodiments of the present disclosure, for example, CSI_INDEX may be the (maximum) number of SL CSI reports identified / distinguished in the time domain or within a waiting time limit associated with the SL CSI report. For example, CSI_INDEX may be the (maximum) number of SLCSI-RS transmissions identified / distinguished in the time domain or within a waiting time limit associated with the SL CSI report. For example, CSI_INDEX may be the (maximum) number of SL CSI reports that the RX UE may send in the time domain or within a waiting time limit associated with the SL CSI report. For example, CSI_INDEX may be the (maximum) number of SL CSI-RS transmissions that the TX UE may send in the time domain or within a waiting time limit associated with the SLCSI report.

[0336] For example, if the TX UE receives information related to SL CSI (e.g., at least one of CSI_OFFVAL, CSI_QTVAL and / or CSIREF_VAL) from the RX UE, the TX UE can derive candidate positions / time domains of the SL CSI-RS (in the opposite direction of the time axis) related to the SL CSI report starting from the time when the SL CSI report is received (e.g., time slot #N) by using the information related to the SL CSI.

[0337] For example, if the TX UE derives a candidate position / time domain of the SL CSI-RS related to the SL CSI report, and if multiple SL CSI-RS sent by the TX UE exist in the candidate position / time domain, the TX UE can consider / determine that the SL CSI-RS sent at the farthest time from time slot #N among the multiple SL CSI-RS is related to the received SL CSI report.

[0338] For example, if the TX UE derives a candidate position / time domain of the SL CSI-RS related to the SL CSI report, and if multiple SL CSI-RS sent by the TX UE exist in the candidate position / time domain, the TX UE can consider / determine that the SL CSI-RS sent at the time closest to time slot #N among the multiple SL CSI-RS is related to the received SL CSI report.

[0339] For example, if the TX UE receives information related to the SL CSI from the RX UE (e.g., at least one of CSI_OFFVAL, CSI_QTVAL, and / or CSIREF_VAL), the TX UE may apply the waiting time limit related to the SL CSI report from the time when the SL CSI-RS is transmitted, and the TX UE may derive / determine the candidate of the SL CSI-RS for which the waiting time limit domain and / or the information related to the SLCSI received from the RX UE is valid (within the waiting time limit domain to which the received SL CSI report belongs). In this case, for example, if there are multiple SL CSI-RSs, the TX UE may consider / determine that the SL CSI-RS at the time farthest from the time when the SLCSI report is received is related to the SL CSI report. For example, if there are multiple SL CSI-RSs, the TX UE may consider / determine that the SL CSI-RS at the time closest to the time when the SL CSI report is received is related to the SL CSI report.

[0340] Fig.21 An example of SL CSI reporting MAC CE based on an embodiment of the present disclosure is shown. Fig.21 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0341] For example, CEILING(log2(CSI_INDEX)) bits may be multiplexed together in the MAC(CE) associated with the SL CSI report. Herein, Y=CEILING(X) may be a function that derives the smallest integer greater than or equal to X.

[0342] For example, the maximum value and / or minimum value related to CSI_INDEX and / or QT_WIN can be configured differently or independently for UE based on the service type. For example, the maximum value and / or minimum value related to CSI_INDEX and / or QT_WIN can be configured differently or independently for UE based on the service priority. For example, the maximum value and / or minimum value related to CSI_INDEX and / or QT_WIN can be configured differently or independently for UE based on the playback type (e.g., unicast, multicast, broadcast). For example, the maximum value and / or minimum value related to CSI_INDEX and / or QT_WIN can be configured differently or independently for UE based on QoS requirements (e.g., reliability, waiting time). For example, the maximum value and / or minimum value related to CSI_INDEX and / or QT_WIN can be configured differently or independently for UE based on UE speed (e.g., absolute speed or relative speed). For example, the maximum value and / or minimum value related to CSI_INDEX and / or QT_WIN can be configured differently or independently for UE based on CSI_LBD. In this document, for example, CSI_LBD can be a latency budget associated with a SL CSI report that is specifically configured for a resource pool or configured through PC5 RRC signaling. For example, the latency budget can include a maximum latency budget, a minimum latency budget, or an average latency budget. For example, the maximum and / or minimum values ​​associated with CSI_INDEX and / or QT_WIN can be configured differently or independently for a UE based on a congestion level (e.g., CBR) (associated with a resource pool).

[0343] For example, the CSI_REFINX information may be multiplexed together in the MAC (CE) associated with the SL CSI report.

[0344] For example, if an indicator of the number of times the TX UE triggers the SL CSI report (within a preconfigured time window or CSI_LBD related to the SL CSI report) is defined / introduced in the SCI, the indicator and the SL CSI request indicator can be jointly indicated by one field (i.e., CSI_JFD). Specifically, for example, if CSI_JFD is defined as 2 bits, CSI_JFD can be defined as shown in Table 11.

[0345] [Table 11]

[0346]

[0347] For example, the TX UE may be configured to not perform a SL CSI report request exceeding a threshold number (e.g., 1) to the RX UE within the CSI_LBD. For example, the threshold number may be configured or pre-configured for the TX UE and / or the RX UE. For example, the threshold number may be a maximum threshold number. For example, the TX UE may not send a SL CSI report request exceeding a threshold number (e.g., 1) to the RX UE within the CSI_LBD. For example, if the threshold number is 1, the TX UE may send a SL CSI report request to the RX UE once within the CSI_LBD. Specifically, for example, if the threshold number is 1, the TX UE may not be allowed to send a SL CSI report request to the RX UE multiple times within the CSI_LBD.

[0348] For example, the TX UE may be configured not to perform a SL CSI report request exceeding a threshold number (e.g., 1) to the RX UE within a time window. For example, a threshold number may be configured or pre-configured for the TX UE and / or the RX UE. For example, the threshold number may be a maximum threshold number. For example, a time window may be configured or pre-configured for the TX UE and / or the RX UE. For example, the TX UE may not send a SL CSI report request exceeding a threshold number (e.g., 1) to the RX UE within the time window. For example, if the threshold number is 1, the TX UE may send a SL CSI report request to the RX UE once within the time window. Specifically, for example, if the threshold number is 1, the TX UE may not be allowed to send a SL CSI report request to the RX UE multiple times within the time window.

[0349] For example, the threshold number may be configured differently or independently for the UE based on the service type. For example, the threshold number may be configured differently or independently for the UE based on the service priority. For example, the threshold number may be configured differently or independently for the UE based on the playback type (e.g., unicast, multicast, broadcast). For example, the threshold number may be configured differently or independently for the UE based on the QoS requirements (e.g., reliability, waiting time). For example, the threshold number may be configured differently or independently for the UE based on the UE speed (e.g., absolute speed or relative speed). For example, the threshold number may be configured differently or independently for the UE based on CSI_LBD. For example, the threshold number may be configured differently or independently for the UE based on the congestion level (e.g., CBR) (related to the resource pool).

[0350] For example, CSI_LBD may be configured differently or independently for a UE based on a service type. For example, CSI_LBD may be configured differently or independently for a UE based on a service priority. For example, CSI_LBD may be configured differently or independently for a UE based on a play type (e.g., unicast, multicast, broadcast). For example, CSI_LBD may be configured differently or independently for a UE based on a QoS requirement (e.g., reliability, latency). For example, CSI_LBD may be configured differently or independently for a UE based on a UE speed (e.g., absolute speed or relative speed). For example, CSI_LBD may be configured differently or independently for a UE based on CSI_LBD. For example, CSI_LBD may be configured differently or independently for a UE based on a congestion level (e.g., CBR) (related to a resource pool).

[0351] For example, the time window may be configured differently or independently for the UE based on the service type. For example, the time window may be configured differently or independently for the UE based on the service priority. For example, the time window may be configured differently or independently for the UE based on the play type (e.g., unicast, multicast, broadcast). For example, the time window may be configured differently or independently for the UE based on the QoS requirements (e.g., reliability, waiting time). For example, the time window may be configured differently or independently for the UE based on the UE speed (e.g., absolute speed or relative speed). For example, the time window may be configured differently or independently for the UE based on CSI_LBD. For example, the time window may be configured differently or independently for the UE based on the congestion level (e.g., CBR) (related to the resource pool).

[0352] For example, the TX UE may be allowed to (limitedly) send an (additional) SL CSI report request to the RX UE only if the TX UE successfully receives the SL CSI related to the previously sent SL CSI report request from the RX UE. For example, the TX UE may be allowed to (limitedly) send an (additional) SL CSI report request to the RX UE only if the TX UE successfully receives the SL CSI related to the previously sent SL CSI report request from the RX UE within the CSI_LBD. For example, the TX UE may be allowed to (limitedly) send an (additional) SL CSI report request to the RX UE only if the TX UE successfully receives the SL CSI related to the previously sent SL CSI report request from the RX UE within the time window.

[0353] Fig. 22 The process of a TX UE sending a CSI report request and a CSI-RS according to an embodiment of the present disclosure is shown. Fig. 22 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0354] Reference Fig. 22 In step S2210, the TX UE may send the first SCI and the second SCI for scheduling the PSSCH to the RX UE through the PSCCH. In addition, the TX UE may send the second SCI and the CSI-RS including the field indicating the CSI report request to the RX UE through the PSSCH. Fig. 22 In the implementation of , it is assumed that the waiting time limit associated with the CSI report is T1. Fig. 22 In the embodiment of the present invention, it is assumed that the TX UE fails to receive the CSI report from the RX UE. Therefore, step S2220 and step S2230 may be omitted. In this case, the TX UE may not be allowed to send an additional CSI report request and CSI-RS to the RX UE within the waiting time limit (T1). Therefore, in step S2240, the TX UE that has not received the CSI report from the RX UE may send a CSI report request and CSI-RS to the RX UE after T1.

[0355] Fig.23 The process of a TX UE sending a CSI report request and a CSI-RS according to an embodiment of the present disclosure is shown. Fig.23 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0356] Reference Fig.23 In step S2310, the TX UE may send the first SCI and the second SCI for scheduling the PSSCH to the RX UE via the PSCCH. In addition, the TX UE may send the second SCI and the CSI-RS including the field indicating the CSI report request to the RX UE via the PSSCH. Fig.23 In the implementation of , it is assumed that the waiting time limit associated with the CSI report is T1. Fig.23 In the implementation manner, it is assumed that the TX UE receives a CSI report from the RX UE.

[0357] Specifically, at step S2320, the RX UE may obtain CSI based on the CSI-RS. In addition, at step S2330, the TX UE may receive a CSI report from the RX UE. In this case, after the TX UE receives the CSI report from the RX UE, the TX UE may be allowed to send an additional CSI report request and CSI-RS to the RX UE. Specifically, for example, the TX UE may be allowed to send an additional CSI report request and CSI-RS to the RX UE in the T3 interval. Therefore, at step S2340, the TX UE that has received the CSI report from the RX UE may send a CSI report request and CSI-RS to the RX UE after T2.

[0358] For example, the UE may send and receive CSI reports based on Table 12.

[0359] [Table 12]

[0360]

[0361] For example, if the TX UE triggers multiple SL CSI reports (e.g., the case where the TX UE sends multiple SL CSI-RS on different subbands), the RX UE may be configured to generate / report wideband CSI information by combining the SL CSI-RS on the subbands when the RX UE reports the SL CSI. For example, if the TX UE triggers multiple SL CSI reports within a CSI_LBD or time window (e.g., the case where the TX UE sends multiple SL CSI-RS on different subbands), the RX UE may be configured to generate / report wideband CSI information by combining the SL CSI-RS on the subbands when the RX UE reports the SL CSI.

[0362] For example, the type of reference MCS table used for SL CSI derivation / calculation may be configured differently for UE for each service type. For example, the type of reference MCS table used for SL CSI derivation / calculation may be configured differently for UE for each service priority. For example, the type of reference MCS table used for SL CSI derivation / calculation may be configured differently for UE for each playback type (e.g., unicast, multicast, broadcast). For example, the type of reference MCS table used for SL CSI derivation / calculation may be configured differently for UE for each QoS requirement (e.g., reliability, waiting time). For example, the type of reference MCS table used for SL CSI derivation / calculation may be configured differently for UE for each (resource pool) congestion level (e.g., CBR). For example, the type of reference MCS table used for SL CSI derivation / calculation may be configured differently for UE for each UE (relative) speed. For example, the type of reference MCS table used for SL CSI derivation / calculation may be configured differently for UE for each resource pool. For example, information related to the type of reference MCS table used for SL CSI derivation / calculation may be exchanged / transmitted between the TX UE and the RX UE through PC5 RRC signaling.

[0363] For example, the RX UE may (re)select transmission resources associated with the SL CSI report from candidate resources on the remaining time slots except for time slots in which relatively high priority transmission (e.g., UL transmission and / or SL transmission) is performed (on different carriers or the same carrier) and / or the power value required for SL CSI transmission is not guaranteed. For example, the time slot in which relatively high priority transmission (e.g., UL transmission and / or SL transmission) is performed may be (i) a time slot in which SL CSI transmission is skipped or (ii) a time slot in which the RX UE fails to allocate the power required for SLCSI transmission. For example, if UL transmission (with relatively high priority) and SL CSI transmission on different carriers overlap (in the time domain), and if the sum of the required power associated with the UL transmission and the required power associated with the SL CSI transmission exceeds the maximum transmit power value of the UE, the power value required for SL CSI transmission in the corresponding time slot may not be guaranteed. For example, the candidate resources may be candidate resources that the RX UE can select based on sensing. In this article, for example, if the above rules are applied, not only the reception reliability associated with the SL CSI report can be guaranteed, but also the problem of missing SL CSI reports can be alleviated.

[0364] Fig.24 A method for a first device to perform wireless communication based on an embodiment of the present disclosure is shown. Fig.24 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0365] Reference Fig.24 , in step S2410, the first device may send first sidelink control information (SCI) and second SCI for scheduling a physical sidelink shared channel (PSSCH) to the second device through a physical sidelink control channel (PSCCH). In step S2420, the first device may send a second SCI including CSI request information indicating a request for a first channel state information (CSI) report and a channel state information-reference signal (CSI-RS) to the second device through the PSSCH. For example, the first device is not allowed to send CSI request information indicating a request for a second CSI report to the second device within a duration associated with the first CSI report.

[0366] For example, the duration associated with the first CSI report may be a waiting time limit associated with the first CSI report. For example, the first device is not allowed to send CSI request information indicating a request for a second CSI report to the second device within the waiting time limit associated with the first CSI report. For example, the waiting time limit may be the number of time slots from the next time slot of the time slot associated with the second SCI to the last time slot of the first CSI report allowed to be requested by the second SCI. For example, the first device may be allowed to send CSI request information indicating a request for a second CSI report to the second device outside the waiting time limit associated with the first CSI report. For example, the waiting time limit associated with the first CSI report may be configured for the first device and the second device.

[0367] For example, the duration associated with the first CSI report may be shorter than or equal to the waiting time limit associated with the first CSI report. In addition, for example, in the first time slot within the waiting time limit associated with the first CSI report, the first device may receive the first CSI report requested by the second SCI from the second device. For example, the duration may end in the first time slot. For example, the first device may be allowed to send CSI request information indicating a request for a second CSI report to the second device in the second time slot after the first time slot. For example, the first device may be allowed to send CSI request information indicating a request for a second CSI report to the second device in the second time slot within the waiting time limit after the first time slot. For example, based on the fact that the first device did not receive the first CSI report requested by the second SCI from the second device within the duration, the first device may not be allowed to send CSI request information to the second device, which indicates a request for a second CSI report within the duration associated with the first CSI report. For example, the end time of the waiting time limit may be the last time slot in which the first CSI report can be received.

[0368] The proposed method can be applied to devices based on various embodiments of the present disclosure. First, the processor 102 of the first device 100 can control the transceiver 106 to send a first sidelink control information (SCI) and a second SCI for scheduling a physical sidelink shared channel (PSSCH) to the second device through a physical sidelink control channel (PSCCH). In addition, the processor 102 of the first device 100 can control the transceiver 106 to send a second SCI and a channel state information-reference signal (CSI-RS) including CSI request information indicating a request for a first channel state information (CSI) report to the second device through the PSSCH. For example, the first device may not be allowed to send CSI request information indicating a request for a second CSI report to the second device within a duration associated with the first CSI report.

[0369] Based on an embodiment of the present disclosure, a first device configured to perform wireless communication may 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. For example, the one or more processors may execute instructions to perform the following operations: sending a first sidelink control information (SCI) and a second SCI for scheduling a physical sidelink shared channel (PSSCH) to a second device via a physical sidelink control channel (PSCCH); and sending a second SCI and a channel state information-reference signal (CSI-RS) including CSI request information indicating a request for a first channel state information (CSI) report to the second device via the PSSCH. For example, the first device may not be allowed to send CSI request information indicating a request for a second CSI report to the second device within a duration associated with the first CSI report.

[0370] Based on an embodiment of the present disclosure, a device configured to control a first user equipment (UE) may be provided. For example, the device may include: one or more processors; and one or more memories, the one or more memories being operatively connected to the one or more processors and storing instructions. For example, the one or more processors may execute instructions to perform the following operations: sending a first sidelink control information (SCI) and a second SCI for scheduling a physical sidelink shared channel (PSSCH) to a second UE via a physical sidelink control channel (PSCCH); and sending a second SCI and a channel state information-reference signal (CSI-RS) including CSI request information indicating a request for a first channel state information (CSI) report to the second UE via the PSSCH. For example, the first UE may not be allowed to send CSI request information indicating a request for a second CSI report to the second UE within a duration associated with the first CSI report.

[0371] Based on the embodiments of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, when the instruction is executed, the first device may perform the following operations: sending a first sidelink control information (SCI) and a second SCI for scheduling a physical sidelink shared channel (PSSCH) to a second device via a physical sidelink control channel (PSCCH); and sending a second SCI and a channel state information-reference signal (CSI-RS) including CSI request information indicating a request for a first channel state information (CSI) report to the second device via the PSSCH. For example, the first device may not be allowed to send CSI request information indicating a request for a second CSI report to the second device within a duration associated with the first CSI report.

[0372] Fig.25 A method for a second device to perform wireless communication based on an embodiment of the present disclosure is shown. Fig.25 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0373] Reference Fig.25 In step S2510, the second device may receive first sidelink control information (SCI) and second SCI for scheduling a physical sidelink shared channel (PSSCH) from the first device via a physical sidelink control channel (PSCCH). In step S2520, the second device may receive second SCI including CSI request information indicating a request for a first channel state information (CSI) report and a channel state information-reference signal (CSI-RS) from the first device via the PSSCH. For example, the first device is not allowed to send CSI request information indicating a request for a second CSI report to the second device within a duration associated with the first CSI report.

[0374] The proposed method can be applied to devices based on various embodiments of the present disclosure. First, the processor 202 of the second device 200 can control the transceiver 206 to receive first sidelink control information (SCI) and second SCI for scheduling a physical sidelink shared channel (PSSCH) from the first device through a physical sidelink control channel (PSCCH). In addition, the processor 202 of the second device 200 can control the transceiver 206 to receive a second SCI and a channel state information-reference signal (CSI-RS) including CSI request information indicating a request for a first channel state information (CSI) report from the first device through the PSSCH. For example, the first device may not be allowed to send CSI request information indicating a request for a second CSI report to the second device within a duration associated with the first CSI report.

[0375] Based on an embodiment of the present disclosure, a second device configured to perform wireless communication may 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 the following operations: receiving a first sidelink control information (SCI) and a second SCI for scheduling a physical sidelink shared channel (PSSCH) from a first device via a physical sidelink control channel (PSCCH); and receiving a second SCI and a channel state information-reference signal (CSI-RS) including CSI request information indicating a request for a first channel state information (CSI) report from a first device via the PSSCH. For example, the first device may not be allowed to send CSI request information indicating a request for a second CSI report to the second device within a duration associated with the first CSI report.

[0376] Based on an embodiment of the present disclosure, a device configured to control a second user equipment (UE) may be provided. For example, the device may include: one or more processors; and one or more memories, the one or more memories being operatively connected to the one or more processors and storing instructions. For example, one or more processors may execute instructions to perform the following operations: receiving a first sidelink control information (SCI) and a second SCI for scheduling a physical sidelink shared channel (PSSCH) from a first UE via a physical sidelink control channel (PSCCH); and receiving a second SCI and a channel state information-reference signal (CSI-RS) including CSI request information indicating a request for a first channel state information (CSI) report from a first UE via the PSSCH. For example, the first UE may not be allowed to send CSI request information indicating a request for a second CSI report to a second UE within a duration associated with the first CSI report.

[0377] Based on the embodiments of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, the instructions may cause the second device to perform the following operations when executed: receiving first sidelink control information (SCI) and second SCI for scheduling a physical sidelink shared channel (PSSCH) from the first device via a physical sidelink control channel (PSCCH); and receiving a second SCI and a channel state information-reference signal (CSI-RS) including CSI request information indicating a request for a first channel state information (CSI) report from the first device via the PSSCH. For example, the first device may not be allowed to send CSI request information indicating a request for a second CSI report to the second device within a duration associated with the first CSI report.

[0378] Based on various embodiments of the present disclosure, after the TX UE requests the RX UE to report SL CSI information, if the TX UE successfully receives the SL CSI information within the relevant (reporting) waiting time budget, the TX UE may request to report additional SL CSI information (to the same RX UE) even if the waiting time budget has not expired. However, if the TX UE does not successfully receive the requested SL CSI information (from the RX UE) within the relevant (reporting) waiting time budget, the TX UE cannot request to report additional SL CSI information (to the same RX UE) within the corresponding waiting time budget.

[0379] Based on various embodiments of the present disclosure, if the TX UE performs SL transmission in time slot #N, the CBR value (e.g., the maximum allowed transmit power value) used for related congestion control may be a value measured by the TX UE at time slot #(NX). In this document, the X value may be configured differently based on the SL SCS value. For example, as the SCS value increases, the X value may be set to a relatively large value.

[0380] Based on various embodiments of the present disclosure, the unit of the PSSCH-related PRG may be configured as the total number of RBs constituting the transmitted PSSCH (ie, the total number of subchannels).

[0381] Various embodiments of the present disclosure may be combined with each other.

[0382] Hereinafter, devices to which various embodiments of the present disclosure can be applied will be described.

[0383] The various descriptions, functions, processes, proposals, methods and / or operational flows of the present disclosure described in this document may be applied to, but not limited to, various fields requiring wireless communication / connection between devices (e.g., 5G).

[0384] Hereinafter, a description will be given in more detail with reference to the accompanying drawings. In the following drawings / descriptions, unless otherwise described, the same reference numerals may represent the same or corresponding hardware blocks, software blocks or functional blocks.

[0385] Fig.26 A communication system (1) according to an embodiment of the present disclosure is shown.

[0386] Reference Fig.26, a communication system (1) to which various embodiments of the present disclosure are applied includes a wireless device, a base station (BS), and a network. Herein, 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. The wireless device may include, but is not limited to, a robot (100a), a vehicle (100b-1, 100b-2), an extended reality (XR) device (100c), a handheld device (100d), a home appliance (100e), an Internet of Things (IoT) device (100f), and an artificial intelligence (AI) device / server (400). For example, a vehicle may include a vehicle with a wireless communication function, an autonomous vehicle, and a vehicle capable of performing inter-vehicle communication. Herein, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of head mounted devices (HMD), head up displays (HUD) installed in vehicles, televisions, smart phones, computers, wearable devices, home appliance devices, digital signage, vehicles, robots, etc. Handheld devices may include smart phones, smart boards, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, a BS and a network may be implemented as wireless devices, and a specific wireless device (200a) may operate as a BS / network node relative to other wireless devices.

[0387] Here, in addition to LTE, NR and 6G, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may also include a narrowband Internet of Things for low-power communication. In this case, for example, NB-IoT technology may be an example of a 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 above names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present 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 as various names including enhanced machine type communication (eMTC), etc. For example, LTE-M technology may be implemented as at least any 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 above names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may include at least one of Bluetooth, a low power wide area network (LPWAN), and ZigBee considering low power communication, and is not limited to the above names. As an example, the ZigBee technology may generate a personal area network (PAN) related to small / low power digital communication based on various standards including IEEE 802.15.4, etc., and may be referred to as various names.

[0388] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. The AI ​​technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI ​​server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., side link communication) with each other without passing through the BS / network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., a sensor) or other wireless devices 100a to 100f.

[0389] Wireless communication / connection 150a, 150b or 150c can be established between wireless devices 100a to 100f / BS200 or BS200 / BS200. Here, the wireless communication / connection can be established through 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, integrated access backhaul (IAB)). The wireless device and the BS / wireless device can send / receive radio signals to / from each other through wireless communication / connection 150a and 150b. For example, wireless communication / connection 150a and 150b can send / receive signals through various physical channels. To this end, various configuration information configuration processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation and resource mapping / demapping) and at least a portion of the resource allocation process can be performed based on various proposals of the present disclosure.

[0390] Fig. 27 A wireless device according to an embodiment of the present disclosure is shown.

[0391] Reference Fig. 27 , the first wireless device (100) and the second wireless device (200) may transmit radio signals via various RATs (e.g., LTE and NR). Herein, {the first wireless device (100) and the second wireless device (200)} may correspond to Fig.26 {wireless device (100x) and BS (200)} and / or {wireless device (100x) and wireless device (100x)}.

[0392] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may also additionally include one or more transceivers 106 and / or one or more antennas (antenna units) 108. The (one or more) processors 102 may control the (one or more) memories 104 and / or the (one or more) transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods and / or operation flows disclosed in this document. For example, the (one or more) processors 102 may process the information in the (one or more) memories 104 to generate first information / signals, and then send a radio signal including the first information / signals through the (one or more) transceivers 106. The (one or more) processors 102 may receive a radio signal including a second information / signal through the transceiver 106, and then store the information obtained by processing the second information / signals in the (one or more) memories 104. The (one or more) memories 104 may be connected to the (one or more) processors 102, and may store various information related to the operation of the (one or more) processors 102. For example, (one or more) memories 104 may store software code including commands for executing part or all of the processing controlled by (one or more) processors 102 or for executing the descriptions, functions, processes, proposals, methods and / or operational flows disclosed in this document. Here, (one or more) processors 102 and (one or more) memories 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). (One or more) transceivers 106 may be connected to (one or more) processors 102 and send and / or receive radio signals through (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 the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0393] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may also additionally include one or more transceivers 206 and / or one or more antennas 208. The (one or more) processors 202 may control the (one or more) memories 204 and / or the (one or more) transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods and / or operation flows disclosed in this document. For example, the (one or more) processors 202 may process the information in the (one or more) memories 204 to generate third information / signals, and then send a radio signal including the third information / signals through the (one or more) transceivers 206. The (one or more) processors 202 may receive a radio signal including a fourth information / signal through the (one or more) transceivers 106, and then store the information obtained by processing the fourth information / signals in the (one or more) memories 204. The (one or more) memories 204 may be connected to the (one or more) processors 202, and may store various information related to the operation of the (one or more) processors 202. For example, (one or more) memories 204 may store software code including commands for executing part or all of the processing controlled by (one or more) processors 202 or for executing 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 a 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 through (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 the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0394] Below, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by, but are not limited to, 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 description, function, process, proposal, method, and / or operation flow disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the description, function, process, proposal, method, and / or operation flow 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 description, function, process, proposal, method, and / or operation flow disclosed in this document, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 can receive signals (e.g., baseband signals) from one or more transceivers 106 and 206 and obtain PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operating procedures disclosed in this document.

[0395] 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 the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute 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.

[0396] 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, codes, 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 drive, registers, cash memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 may be located inside and / or outside 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.

[0397] One or more transceivers 106 and 206 may send user data, control information, and / or radio signals / channels mentioned in the method and / or operation flow 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 description, function, process, proposal, method, and / or operation flow 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 send and receive radio signals. For example, one or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may send user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may perform control so 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 send and receive user data, control information and / or radio signals / channels mentioned in the description, functions, processes, proposals, methods and / or operation flows 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 to process received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0398] Fig.28 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0399] Reference Fig.28 The signal processing circuit (1000) may include a scrambler (1010), a modulator (1020), a layer mapper (1030), a precoder (1040), a resource mapper (1050), and a signal generator (1060). Fig.28 Operation / function, not limited to Fig. 27 The processor (102, 202) and / or transceiver (106, 206) of Fig. 27The processor (102, 202) and / or the transceiver (106, 206) are implemented Fig.28 For example, you can Fig. 27 The processor (102, 202) implements blocks 1010 to 1060. Alternatively, Fig. 27 The processor (102, 202) implements blocks 1010 to 1050 and can be implemented by Fig. 27 The transceiver (106, 206) is used to implement box 1060.

[0400] Can be through Fig.28 The signal processing circuit (1000) converts the codeword into a radio signal. Herein, the codeword is a coded bit sequence of an information block. The information block may include a transport block (e.g., UL-SCH transport block, DL-SCH transport block). The radio signal may be transmitted through various physical channels (e.g., PUSCH and PDSCH).

[0401] Specifically, the codeword can be converted into a scrambled bit sequence by the scrambler 1010. The scrambling sequence for scrambling can be generated based on an initial value, and the initial value can include the ID information of the wireless device. The scrambled bit sequence can be modulated into a modulation symbol sequence by the 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 the layer mapper 1030. The modulation symbol of each transmission layer can be mapped (precoded) to (one or more) corresponding antenna ports by the precoder 1040. The output z of the precoder 1040 can be obtained by multiplying the output y of the layer mapper 1030 with the N*M precoding matrix W. Here, N is the number of antenna ports and M is the number of transmission layers. The precoder 1040 can perform precoding after performing transform precoding (e.g., DFT) for the complex modulation symbol. Alternatively, the precoder 1040 may perform precoding without performing transform precoding.

[0402] The resource mapper 1050 may map the modulation symbols of each antenna port to time-frequency resources. The 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. The signal generator 1060 may generate a radio signal from the mapped modulation symbols, and the generated radio signal may be sent to other devices through each antenna. To this end, the 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.

[0403] Can be used with Fig.28 The signal processing process for the signal received in the wireless device is configured in a manner opposite to the signal processing process (1010-1060) of the wireless device. Fig. 27 100, 200) can receive a radio signal from the outside through an antenna port / transceiver. The received radio signal can be converted into a baseband signal by a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a fast Fourier transform (FFT) module. Next, the baseband signal can be restored to a codeword through a resource demapping process, a post-coding process, a demodulation processor, and a descrambling process. The codeword can be restored to the original information block by decoding. Therefore, a signal processing circuit (not illustrated) for receiving a signal may include a signal restorer, a resource demapper, a post-encoder, a demodulator, a descrambler, and a decoder.

[0404] Fig.29 Another example of a wireless device according to an embodiment of the present disclosure is shown. The wireless device can be implemented in various forms according to use cases / services (see Fig.26 ).

[0405] Reference Fig.29 , the wireless device (100, 200) may correspond to Fig. 27 The wireless devices (100, 200) may be configured by various elements, components, units / portions 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 Fig. 27 One or more processors (102, 202) and / or one or more memories (104, 204) of the present invention. For example, the transceiver(s) (114) may include Fig. 27The control unit (120) is electrically connected to the communication unit (110), the memory unit (130) and the additional components (140), and controls the overall operation of the wireless device. For example, the control unit (120) can control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit (130). The control unit (120) can send the information stored in the memory unit (130) to the outside (e.g., other communication devices) via the communication unit (110) through the wireless / wired interface, or store the information received from the outside (e.g., other communication devices) via the communication unit (110) through the wireless / wired interface in the memory unit (130).

[0406] The additional component (140) may be configured in various ways depending on the type of the wireless device. For example, the additional component (140) may include at least one of a power unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be implemented in the following forms without limitation: a robot ( Fig.26 100a), vehicles ( Fig.26 100b-1 and 100b-2), XR devices ( Fig.26 100c), handheld device ( Fig.26 100d), household appliances ( Fig.26 100e), IoT devices ( Fig.26 100f), digital broadcast terminal, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Fig.26 400), BS( Fig.26 200), network nodes, etc. Depending on the use case / service, the wireless device can be used in a mobile or fixed place.

[0407] exist Fig.29In the wireless device (100, 200), all the various elements, components, units / parts and / or modules in the wireless device (100, 200) can be connected to each other through a wired interface, or at least part of them can be connected wirelessly through the 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 by wire, and the control unit (120) and the first unit (e.g., 130, 140) can be connected wirelessly through the communication unit (110). Each element, component, unit / part and / or module in the wireless device (100, 200) can also include one or more elements. For example, the control unit (120) can be constructed by a collection of one or more processors. As an example, the control unit (120) can be constructed by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. As another example, the memory unit (130) may be constructed by a random access memory (RAM), a dynamic RAM (DRAM), a read only memory (ROM), a flash memory, a volatile memory, a nonvolatile memory, and / or a combination thereof.

[0408] Hereinafter, the implementation will be described in detail with reference to the accompanying drawings. Fig.29 .

[0409] Fig.30 A handheld device according to an embodiment of the present disclosure is shown. The handheld device may include a smart phone, a smart pad, a wearable device (e.g., a smart watch or smart glasses), or a portable computer (e.g., a notebook). The handheld device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT).

[0410] Reference Fig.30 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 a part of the communication unit (110). Blocks 110 to 130 / 140a to 140c correspond to Fig.29 Frame 110 to 130 / 140.

[0411] The communication unit 110 may send and receive signals (e.g., data signals and control signals) to and from other wireless devices or BSs. The control unit 120 may perform various operations by controlling the constituent elements of the handheld device 100. The control unit 120 may include an application processor (AP). The memory unit 130 may store data / parameters / programs / codes / commands required to drive the handheld device 100. The memory unit 130 may store input / output data / information. The power supply unit 140a may supply power to the handheld device 100 and include a wired / wireless charging circuit, a battery, etc. The interface unit 140b may support the connection of the handheld device 100 to other external devices. The interface unit 140b may include various ports (e.g., audio I / O ports and video I / O ports) for connecting to external devices. The I / O unit 140c may input or output video information / signals, audio information / signals, data and / or information input by a user. The I / O unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker and / or a tactile module.

[0412] For example, in the case of data communication, the I / O unit 140c can obtain information / signals (e.g., touch, text, voice, image, or video) input by the user, and the obtained information / signals can be stored in the memory unit 130. The communication unit 110 can convert the information / signals stored in the memory into radio signals, and directly send the converted radio signals to other wireless devices or to the BS. The communication unit 110 can receive radio signals from other wireless devices or BSs, and then restore the received radio signals to the original information / signals. The restored information / signals can be stored in the memory unit 130, and can be output as various types (e.g., text, voice, image, video, or tactile) through the I / O unit 140.

[0413] Fig.31 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. The vehicle or autonomous vehicle may be implemented by a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc.

[0414] Reference Fig.31 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 a part of the communication unit (110). Blocks 110 / 130 / 140a to 140d correspond to Fig.29 Frame 110 / 130 / 140.

[0415] The communication unit 110 may send and receive signals (e.g., data signals and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. The control unit 120 may perform various operations by controlling elements of the vehicle or autonomous vehicle 100. The control unit 120 may include an electronic control unit (ECU). The drive unit 140a may cause the vehicle or autonomous vehicle 100 to travel on the road. The drive unit 140a may include an engine, a motor, a transmission system, wheels, brakes, a steering device, etc. The power supply unit 140b may supply power to the vehicle or autonomous vehicle 100, and may include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c may acquire vehicle status, external environment information, user information, etc. The sensor unit 140c may include an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a position module, a vehicle forward / reverse sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. The autonomous driving unit 140d may implement a technology for maintaining a lane in which the vehicle is traveling, a technology for automatically adjusting a speed (e.g., adaptive cruise control), a technology for autonomously driving along a determined path, a technology for driving by automatically setting a path when a destination is set, and the like.

[0416] For example, the communication unit 110 may receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d may generate an autonomous driving path and a driving plan from the acquired data. The control unit 120 may control the drive unit 140a so that the vehicle or the autonomous driving vehicle 100 may move along the autonomous driving path according to the driving plan (e.g., speed / direction control). In the middle of autonomous driving, the communication unit 110 may aperiodically / periodically acquire the most recent traffic information data from an external server and acquire surrounding traffic information data from adjacent vehicles. In the middle of autonomous driving, the sensor unit 140c may acquire vehicle status and / or surrounding environment information. The autonomous driving unit 140d may update the autonomous driving path and driving plan based on the newly acquired data / information. The communication unit 110 may transmit information about the vehicle position, autonomous driving path, and / or driving plan to an external server. The external server may predict traffic information data using AI technology, etc. based on information collected from the vehicle or autonomous driving vehicle, and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0417] The claims in this specification may be combined in various ways. For example, the technical features in the method claims of this specification may be combined to be implemented or performed in a device, and the technical features in the device claims may be combined to be implemented or performed in a method. In addition, the technical features in (one or more) method claims and (one or more) device claims may be combined to be implemented or performed in a device. In addition, the technical features in (one or more) method claims and (one or more) device claims may be combined to be implemented or performed in a method.

Claims

1. A method for performing wireless communication by a first device, the method comprising the following steps: Sending first side link control information SCI and second SCI for scheduling a physical side link shared channel PSSCH to the second device via a physical side link control channel PSCCH; as well as sending the second SCI including first CSI request information indicating a request for a first channel state information CSI report to the second device through the PSSCH, wherein the transmission of the channel state information-reference signal CSI-RS is within the transmission of the PSSCH, and The first device is not allowed to trigger the second CSI report for the second device by sending second CSI request information indicating a request for a second CSI report to the second device before the completion time of the first CSI report.

2. The method according to claim 1, wherein: The first device is not allowed to trigger the second CSI report for the second device by sending the second CSI request information indicating a request for the second CSI report to the second device before the completion time of the first CSI report or within a waiting time limit related to the first CSI report.

3. The method according to claim 2, wherein: The waiting time limit is the number of time slots from a next time slot of a time slot associated with the second SCI to a last time slot allowing the first CSI report requested by the second SCI.

4. The method according to claim 1, wherein: The first device is allowed to trigger the second CSI report for the second device by sending the second CSI request information indicating a request for the second CSI report to the second device outside a waiting time limit related to the first CSI report.

5. The method according to claim 2, wherein: The waiting time limit associated with the first CSI report is configured for the first apparatus and the second apparatus.

6. The method according to claim 1, wherein: A duration of the completion time for the first CSI report is shorter than or equal to a waiting time limit associated with the first CSI report.

7. The method according to claim 6, further comprising the steps of: The first CSI report requested by the second SCI is received from the second device in a first time slot within the waiting time limit associated with the first CSI report.

8. The method according to claim 7, wherein: The duration ends in the first time slot.

9. The method according to claim 7, wherein: The first device is allowed to trigger the second CSI report for the second device by sending the second CSI request information indicating a request for the second CSI report to the second device in a second time slot after the first time slot.

10. The method according to claim 7, wherein: The first device is allowed to trigger the second CSI report for the second device in a second time slot within the waiting time limit after the first time slot by sending the second CSI request information indicating a request for the second CSI report to the second device.

11. The method according to claim 6, wherein: Based on the fact that the first device has not received the first CSI report requested by the second SCI from the second device within the duration, the first device is not allowed to trigger the second CSI report for the second device by sending the second CSI request information indicating a request for the second CSI report to the second device before the completion time of the first CSI report.

12. The method according to claim 6, wherein: The end time of the waiting time limit is the last time slot in which the first CSI report can be received.

13. A first device configured to perform wireless communication, the first device comprising: one or more memories storing instructions; one or more transceivers; as well as one or more processors, the one or more processors connected to the one or more memories and the one or more transceivers, wherein the one or more processors execute the instructions to perform the following operations: Sending first sidelink control information SCI and second SCI for scheduling a physical sidelink shared channel PSSCH to the second device through a physical sidelink control channel PSCCH; and sending the second SCI including first CSI request information indicating a request for a first channel state information CSI report to the second device through the PSSCH, wherein the transmission of a channel state information-reference signal CSI-RS is within the PSSCH transmission, and The first device is not allowed to trigger the second CSI report for the second device by sending second CSI request information indicating a request for a second CSI report to the second device before the completion time of the first CSI report.

14. An apparatus configured to control a first user equipment UE performing wireless communication, the apparatus comprising: one or more processors; as well as one or more memories operatively connected to the one or more processors and storing instructions, wherein the one or more processors execute the instructions to perform the following operations: Sending first sidelink control information SCI and second SCI for scheduling a physical sidelink shared channel PSSCH to the second UE through a physical sidelink control channel PSCCH; and sending the second SCI including first CSI request information indicating a request for a first channel state information CSI report to the second UE through the PSSCH, wherein the transmission of the channel state information-reference signal CSI-RS is within the transmission of the PSSCH, and The first UE is not allowed to trigger the second CSI report for the second UE by sending second CSI request information indicating a request for a second CSI report to the second UE before the completion time of the first CSI report.

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