Patent Description:
Sidelink (SL) communication is a communication scheme in which a direct link is established between User Equipments (UEs) and the UEs exchange voice and data directly with each other without intervention of an evolved Node B (eNB). SL communication is under consideration as a solution to the overhead of an eNB caused by rapidly increasing data traffic. Vehicle-to-everything (V2X) refers to a communication technology through which a vehicle exchanges information with another vehicle, a pedestrian, an object having an infrastructure (or infra) established therein, and so on. The V2X may be divided into <NUM> types, such as vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-network (V2N), and vehicle-to-pedestrian (V2P). The V2X communication may be provided via a PC5 interface and/or Uu interface.

Document D1: <CIT> (<NUM>-<NUM>-<NUM>) discloses a method for a user equipment (UE) comprising: receiving information to select resources for an aperiodic bursty traffic; performing, over a sensing window, a signal measurement of the received signals; identifying a resource selection window; and transmitting, via the sidelink, the bursty aperiodic traffic using the reserved resources.

Document D2: <CIT> (<NUM>-<NUM>-<NUM>) discloses a method for autonomous resource selection in new radio (NR) vehicle-to-everything (V2X) sidelink communication. A sensing-based method of resource selection is described, including a sensing window design and techniques for selecting resources and transmitting resource reservation information.

In an embodiment, an operation method of a first device <NUM> in wireless communication system is proposed. The method may comprise: selecting a burst transmission resource, in a selection window, including a plurality of transmission resources, based on the sensing, wherein a first reference signal received power, RSRP, threshold used in selection for the burst transmission resource is greater than a second RSRP threshold used in selection for a non-burst transmission resource; transmitting, to a second device, sidelink control information, SCI, for scheduling of a physical sidelink shared channel, PSSCH, through a physical sidelink control channel, PSCCH, based on the burst transmission resource, wherein the SCI includes information related to the burst transmission resource; and transmitting, to the second device, a medium access control, MAC, protocol data unit, PDU, through the PSSCH, based on the burst transmission resource.

The user equipment (UE) may efficiently perform SL communication.

In the present disclosure, "A or B" may mean "only A", "only B" or "both A and B. " In other words, in the present disclosure, "A or B" may be interpreted as "A and/or B". For example, in the present disclosure, "A, B, or C" may mean "only A", "only B", "only C", or "any combination of A, B, C".

A slash (/) or comma used in the present disclosure may mean "and/or". For example, "A, B, C" may mean "A, B, or C".

In the present disclosure, "at least one of A and B" may mean "only A", "only B", or "both A and B". In addition, in the present disclosure, 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".

In addition, in the present disclosure, "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".

In addition, a parenthesis used in the present disclosure may mean "for example". Specifically, when indicated as "control information (PDCCH)", it may mean that "PDCCH" is proposed as an example of the "control information". In other words, the "control information" of the present disclosure is not limited to "PDCCH", and "PDCCH" may be proposed as an example of the "control information". In addition, when indicated as "control information (i.e., PDCCH)", it may also mean that "PDCCH" is proposed as an example of the "control information".

In the following description, 'when, if, or in case of' may be replaced with 'based on'.

A technical feature described individually in one figure in the present disclosure may be individually implemented, or may be simultaneously implemented.

In the present disclosure, a higher layer parameter may be a parameter which is configured, pre-configured or pre-defined for a UE. For example, a base station or a network may transmit the higher layer parameter to the UE. For example, the higher layer parameter may be transmitted through radio resource control (RRC) signaling or medium access control (MAC) signaling.

For terms and techniques not specifically described among terms and techniques used in this specification, a wireless communication standard document published before the present specification is filed may be referred to.

Layers of a radio interface protocol between the UE and the network can be classified into a first layer (layer <NUM>, L1), a second layer (layer <NUM>, L2), and a third layer (layer <NUM>, L3) based on the lower three layers of the open system interconnection (OSI) model that is well-known in the communication system. Among them, a physical (PHY) layer belonging to the first layer provides an information transfer service by using a physical channel, and a radio resource control (RRC) layer belonging to the third layer serves to control a radio resource between the UE and the network. For this, the RRC layer exchanges an RRC message between the UE and the BS.

<FIG> shows a radio protocol architecture, based on an embodiment of the present disclosure. Specifically, (a) of <FIG> shows a radio protocol stack of a user plane for Uu communication, and (b) of <FIG> shows a radio protocol stack of a control plane for Uu communication. (c) of <FIG> shows a radio protocol stack of a user plane for SL communication, and (d) of <FIG> shows a radio protocol stack of a control plane for SL communication.

A radio resource control (RRC) layer is defined only in the control plane. The RRC layer serves to control the logical channel, the transport channel, and the physical channel in association with configuration, reconfiguration and release of RBs. The RB is a logical path provided by the first layer (i.e., the physical layer or the PHY layer) and the second layer (i.e., a MAC layer, an RLC layer, a packet data convergence protocol (PDCP) layer, and a service data adaptation protocol (SDAP) layer) for data delivery between the UE and the network.

<FIG> shows a structure of a radio frame of an NR, based on an embodiment of the present disclosure.

Table <NUM> shown below represents an example of a number of symbols per slot (Nslotsymb), a number slots per frame (Nrame,uslot), and a number of slots per subframe (Nsubframe,uslot) based on an SCS configuration (u), in a case where a normal CP is used.

The BWP may be a set of consecutive physical resource blocks (PRBs) in a given numerology. The PRB may be selected from consecutive sub-sets of common resource blocks (CRBs) for the given numerology on a given carrier
For example, the BWP may be at least any one of an active BWP, an initial BWP, and/or a default BWP.

Meanwhile, the BWP may be defined for SL. The same SL BWP may be used in transmission and reception. For example, a transmitting UE may transmit an SL channel or an SL signal on a specific BWP, and a receiving UE may receive the SL channel or the SL signal on the specific BWP. In a licensed carrier, the SL BWP may be defined separately from a Uu BWP, and the SL BWP may have configuration signaling separate from the Uu BWP. For example, the UE may receive a configuration for the SL BWP from the BS/network. For example, the UE may receive a configuration for the Uu BWP from the BS/network. The SL BWP may be (pre-)configured in a carrier with respect to an out-of-coverage NR V2X UE and an RRC_IDLE UE. For the UE in the RRC_CONNECTED mode, at least one SL BWP may be activated in the carrier.

A sidelink synchronization signal (SLSS) may include a primary sidelink synchronization signal (PSSS) and a secondary sidelink synchronization signal (SSSS), as an SL-specific sequence. The PSSS may be referred to as a sidelink primary synchronization signal (S-PSS), and the SSSS may be referred to as a sidelink secondary synchronization signal (S-SSS). For example, length-<NUM>-sequences may be used for the S-PSS, and length-<NUM> gold sequences may be used for the S-SSS. For example, a UE may use the S-PSS for initial signal detection and for synchronization acquisition. For example, the UE may use the S-PSS and the S-SSS for acquisition of detailed synchronization and for detection of a synchronization signal ID.

A physical sidelink broadcast channel (PSBCH) may be a (broadcast) channel for transmitting default (system) information which must be first known by the UE before SL signal transmission/reception. For example, the default information may be information related to SLSS, a duplex mode (DM), a time division duplex (TDD) uplink/downlink (UL/DL) configuration, information related to a resource pool, a type of an application related to the SLSS, a subframe offset, broadcast information, or the like. For example, for evaluation of PSBCH performance, in NR V2X, a payload size of the PSBCH may be <NUM> bits including <NUM>-bit cyclic redundancy check (CRC).

<FIG> shows a procedure of performing V2X or SL communication by a UE based on a transmission mode, based on an embodiment of the present disclosure. In various embodiments of the present disclosure, the transmission mode may be called a mode or a resource allocation mode. Hereinafter, for convenience of explanation, in LTE, the transmission mode may be called an LTE transmission mode. In NR, the transmission mode may be called an NR resource allocation mode.

For example, (a) of <FIG> shows a UE operation related to an LTE transmission mode <NUM> or an LTE transmission mode <NUM>. Alternatively, for example, (a) of <FIG> shows a UE operation related to an NR resource allocation mode <NUM>. For example, the LTE transmission mode <NUM> may be applied to general SL communication, and the LTE transmission mode <NUM> may be applied to V2X communication.

For example, (b) of <FIG> shows a UE operation related to an LTE transmission mode <NUM> or an LTE transmission mode <NUM>. Alternatively, for example, (b) of <FIG> shows a UE operation related to an NR resource allocation mode <NUM>.

Referring to (a) of <FIG>, in the LTE transmission mode <NUM>, the LTE transmission mode <NUM>, or the NR resource allocation mode <NUM>, a base station may schedule SL resource(s) to be used by a UE for SL transmission. For example, in step S600, a base station may transmit information related to SL resource(s) and/or information related to UL resource(s) to a first UE. For example, the UL resource(s) may include PUCCH resource(s) and/or PUSCH resource(s). For example, the UL resource(s) may be resource(s) for reporting SL HARQ feedback to the base station.

For example, the first UE may receive information related to dynamic grant (DG) resource(s) and/or information related to configured grant (CG) resource(s) from the base station. For example, the CG resource(s) may include CG type <NUM> resource(s) or CG type <NUM> resource(s). In the present disclosure, the DG resource(s) may be resource(s) configured/allocated by the base station to the first UE through a downlink control information (DCI). In the present disclosure, the CG resource(s) may be (periodic) resource(s) configured/allocated by the base station to the first UE through a DCI and/or an RRC message. For example, in the case of the CG type <NUM> resource(s), the base station may transmit an RRC message including information related to CG resource(s) to the first UE. For example, in the case of the CG type <NUM> resource(s), the base station may transmit an RRC message including information related to CG resource(s) to the first UE, and the base station may transmit a DCI related to activation or release of the CG resource(s) to the first UE.

In step S610, the first UE may transmit a PSCCH (e.g., sidelink control information (SCI) or 1st-stage SCI) to a second UE based on the resource scheduling. In step S620, the first UE may transmit a PSSCH (e.g., 2nd-stage SCI, MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S630, the first UE may receive a PSFCH related to the PSCCH/PSSCH from the second UE. For example, HARQ feedback information (e.g., NACK information or ACK information) may be received from the second UE through the PSFCH. In step S640, the first UE may transmit/report HARQ feedback information to the base station through the PUCCH or the PUSCH. For example, the HARQ feedback information reported to the base station may be information generated by the first UE based on the HARQ feedback information received from the second UE. For example, the HARQ feedback information reported to the base station may be information generated by the first UE based on a pre-configured rule. For example, the DCI may be a DCI for SL scheduling. For example, a format of the DCI may be a DCI format 3_0 or a DCI format 3_1.

Referring to (b) of <FIG>, in the LTE transmission mode <NUM>, the LTE transmission mode <NUM>, or the NR resource allocation mode <NUM>, a UE may determine SL transmission resource(s) within SL resource(s) configured by a base station/network or pre-configured SL resource(s). For example, the configured SL resource(s) or the pre-configured SL resource(s) may be a resource pool. For example, the UE may autonomously select or schedule resource(s) for SL transmission. For example, the UE may perform SL communication by autonomously selecting resource(s) within the configured resource pool. For example, the UE may autonomously select resource(s) within a selection window by performing a sensing procedure and a resource (re)selection procedure. For example, the sensing may be performed in a unit of subchannel(s). For example, in step S610, a first UE which has selected resource(s) from a resource pool by itself may transmit a PSCCH (e.g., sidelink control information (SCI) or 1st-stage SCI) to a second UE by using the resource(s). In step S620, the first UE may transmit a PSSCH (e.g., 2nd-stage SCI, MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S630, the first UE may receive a PSFCH related to the PSCCH/PSSCH from the second UE.

Referring to (a) or (b) of <FIG>, for example, a first UE may transmit SCI to a second UE on PSCCH. Alternatively, for example, a first UE may transmit two consecutive SCI (e.g., <NUM>-stage SCI) to a second UE on PSCCH and/or PSSCH. In this case, a second UE may decode two consecutive SCIs (e.g., <NUM>-stage SCI) in order to receive the PSSCH from a first UE. In this specification, SCI transmitted on PSCCH may be referred to as a 1st SCI, SCI <NUM>, 1st-stage SCI or 1st-stage SCI format, and SCI transmitted on the PSSCH may be referred to as a 2nd SCI, SCI <NUM>, 2nd-stage SCI or 2nd-stage SCI format. For example, the 1st-stage SCI format may include SCI format <NUM>-A, and the 2nd-stage SCI format may include SCI format <NUM>-A and/or SCI format <NUM>-B.

Hereinafter, an example of SCI format <NUM>-A will be described.

SCI format <NUM>-A is used for the scheduling of PSSCH and 2nd-stage-SCI on PSSCH.

The following information is transmitted by means of the SCI format <NUM>-A:.

SCI format <NUM>-A is used for the decoding of PSSCH, with HARQ operation when HARQ-ACK information includes ACK or NACK, when HARQ-ACK information includes only NACK, or when there is no feedback of HARQ-ACK information.

Hereinafter, an example of SCI format <NUM>-B will be described.

SCI format <NUM>-B is used for the decoding of PSSCH, with HARQ operation when HARQ-ACK information includes only NACK, or when there is no feedback of HARQ-ACK information.

The following information is transmitted by means of the SCI format <NUM>-B:.

Referring to (a) or (b) of <FIG>, in step S630, a first UE may receive the PSFCH. For example, a first UE and a second UE may determine PSFCH resources, and a second UE may transmit HARQ feedback to a first UE using the PSFCH resource.

The following describes a UE procedure to report HARQ-ACK on a sidelink.

A UE may be instructed by SCI format that schedules a reception of PSSCH on one or more subchannels from NPSSCHsubch to transmit a PSFCH that includes HARQ-ACK information in response to the reception of a PSSCH. A UE provides HARQ-ACK information including ACK or NACK, or NACK only.

A UE may be provided with the number of slots in a resource pool for PSFCH transmission occasion resources by sl-PSFCH-Period-r16. If the number is zero, PSFCH transmission from a UE is disabled in the resource pool. A UE expects to have a PSFCH transmission occasion resource in slot t'kSL (<NUM> ≤ k < T'max) if k mod NPSFCHPSSCH = <NUM>, where t'kSL is a slot in the resource pool, and T'max is the number of slots in the resource pool within <NUM> msec, and NPSFCHPSSCH is provided in sl-PSFCH-Period-r16. A UE may be instructed by the upper layer not to transmit a PSFCH in response to the reception of a PSSCH. If a UE receives a PSSCH in the resource pool and the HARQ feedback enabled/disabled indicator field included in the associated SCI format <NUM>-A or SCI format <NUM>-B has a value of <NUM>, the UE provides HARQ-ACK information via PSFCH transmission from in resource pool. A UE transmits the PSFCH in a first slot, wherein the first slot is the slot including a PSFCH resource and after the minimum number of slots provided by sl-MinTimeGapPSFCH-r16 of the resource pool after the last slot of the PSSCH reception.

A UE is provided by sl-PSFCH-RB-Set-r16 with MPSFCHPRB,set of PRBs in a resource pool for PSFCH transmissions on PRBs in the resource pool. For the number of PSSCH slots related to a PSFCH slot that is less than or equal to Nsubch and NPSFCHPSSCH, the number of subchannels for the resource pool provided by sl-NumSubchannel, a UE allocates the PRB [(i+j-NPSFCHPSSCH)-MPSFCHsubch,slot, (i+<NUM>+j-NPSFCHPSSCH)-MPSFCHsubch,slot-<NUM>] among the MPRB, setPSFCH PRB for slot i and subchannel j among the PSSCH slots associated with the PSFCH slot. Here, MPHFCHsubch,slot = MPSFCHPRB,set / (Nsubch-NPSFCHPSSCH), <NUM> ≤ i < NPSFCHPSSCH, <NUM> ≤ j < Nsubch, and the allocations starts in ascending order for i and continues in ascending order for j. A UE expects MPSFCHPRB,set to be a multiple of Nsubch·NPSFCHPSSCH.

A UE determines the number of available PSFCH resources for multiplexing HARQ-ACK information included in a PSFCH transmission as RPSFCHPRB,CS = NPSFCHtype·MPSFCHsubch,slot·NPSFCHCS. Here, NPSFCHCS may be the number of cyclic shift pairs for the resource pool, and based on an indication by the higher layer,.

A PSFCH resource is indexed first in ascending order of a PRB indexes among NPSFCHtype·MPSFCHsubch,slot PRBs, after then, it is indexed in ascending order of cyclic shift pair indexes among NPSFCHCS cyclic shift pairs.

A UE determines an index of a PSFCH resource for a PSFCH transmission in response to the PSSCH reception as (PID + MID) mod RPSFCHPRB,CS. Here, PID is a physical layer source ID provided by SCI format <NUM>-A or <NUM>-B scheduling a PSSCH reception, MID is an ID of a UE receiving a PSSCH, indicated from the higher layer when a UE detects SCI format <NUM>-A in which a cast type indicator field value is "<NUM>", MID is <NUM> otherwise.

A UE determines m<NUM> value for calculating a cyclic shift α value from NPSFCHCS and a cyclic shift pair index which corresponds to a PSFCH resource index using Table <NUM>.

As shown in Table <NUM>, when a UE detects SCI format <NUM>-A with a cast type indicator field value of "<NUM>" or "<NUM>", or as shown in Table <NUM>, when a UE detects SCI format <NUM>-B or SCI format <NUM>-A with a cast type indicator field value of "<NUM>", a UE determines mcs the value for calculating a cyclic shift α value. A UE applies one cyclic shift among cyclic shifts to a sequence used in a PSFCH transmission.

Hereinafter, a UE procedure for determining a subset of resources to be reported to an higher layer in PSSCH resource selection in sidelink resource allocation mode <NUM> will be described.

In resource allocation mode <NUM>, the higher layer can request the UE to determine a subset of resources from which the higher layer will select resources for PSSCH/PSCCH transmission. To trigger this procedure, in slot n, the higher layer provides the following parameters for this PSSCH/PSCCH transmission:.

The following higher layer parameters affect this procedure:
sl-SelectionWindowList: internal parameter T<NUM>min is set to the corresponding value from higher layer parameter sl-SelectionWindowList for the given value of prioTX.

The resource reservation interval, Prsvp_TX, if provided, is converted from units of msec to units of logical slots, resulting in <MAT>.

<MAT> may denote the set of slots which belongs to the sidelink resource pool.

For example, a UE may select a set of candidate resources (Sa) based on Table <NUM>. For example, when resource (re)selection is triggered, a UE may select a candidate resource set (Sa) based on Table <NUM>. For example, when re-evaluation or pre-emption is triggered, a UE may select a candidate resource set (Sa) based on Table <NUM>.

Meanwhile, partial sensing may be supported for power saving of the UE. For example, in LTE SL or LTE V2X, the UE may perform partial sensing based on Tables <NUM> and <NUM>.

Referring to (a) of <FIG>, in step S640, the first UE may transmit SL HARQ feedback to the base station through the PUCCH and/or the PUSCH.

<FIG> shows three cast types, in accordance with an embodiment of the present disclosure. Specifically, <FIG> shows broadcast-type SL communication, <FIG> shows unicast type-SL communication, and <FIG> shows groupcast-type SL communication. In case of the unicast-type SL communication, a UE may perform one-to-one communication with respect to another UE. In case of the groupcast-type SL transmission, the UE may perform SL communication with respect to one or more UEs in a group to which the UE belongs. In various embodiments of the present disclosure, SL groupcast communication may be replaced with SL multicast communication, SL one-to-many communication, or the like.

<FIG> shows an example of a burst resource according to an embodiment of the present disclosure.

Referring to <FIG>, a UE may select/determine a plurality of resources. For example, a UE may select/determine a plurality of resources within a resource pool. For example, the plurality of resources may be continuous resources in the time domain. For example, the plurality of resources may be resources with a time interval (e.g., slot interval) within a threshold value in the time domain.

Referring to <FIG>, a UE may select/determine a plurality of resources. For example, a UE may select/determine a plurality of resources within a resource pool. For example, the plurality of resources may be continuous resources in the frequency domain. For example, the plurality of resources may be resources with frequency intervals (e.g., RB intervals or subchannel intervals) within a threshold value in the frequency domain.

Meanwhile, SL communication needs to be performed based on aggregated resources (e.g., burst resources) in NR V2X. For example, an aggregated resource be a contiguous set of resources (e.g., a contiguous set of resources in the time domain and/or frequency domain). For example, an aggregated resources may be a set of resources with an interval within a threshold value (e.g., a set of resources spaced apart within a threshold in the time domain and/or frequency domain). Hereinafter, the reason why aggregated resource-based SL communication is required in NR V2X will be described in detail.

For example, unlike LTE V2X, aperiodic transmission is supported in NR V2X. Compared to periodic transmission, aperiodic transmission has a high possibility of transmission failure due to channel congestion or the like within a packet delay budget (PDB) of a packet from the time of packet generation. Accordingly, a UE may perform burst transmission by selecting aggregated resources for aperiodic transmission, thereby maximizing the transmission success probability within the PDB.

For example, unlike LTE V2X, in NR V2X, packets with strict delay requirements need to be transmitted. Table <NUM> shows the mapping between Standardized PQI and QoS characteristics.

Referring to Table <NUM>, the PDB corresponding to PQI <NUM> is <NUM>. In this case, in the case of <NUM>, a UE must transmit the corresponding packet within <NUM> slots. If aggregated resources are not supported, a UE can transmit a packet corresponding to PQI <NUM> using only one slot, and if the transmission fails, the UE's retransmission opportunity may not be guaranteed. However, if aggregated transmission is supported, a UE can transmit packets corresponding to PQI <NUM> using <NUM> consecutive slots, and through this, the transmission success probability can be increased. For convenience of description, the description is based on PQI <NUM>, but the same problem may occur in packets having tight delay requirements, such as PQI <NUM> and PQI <NUM>.

Meanwhile, aggregated resource selection/reservation may be required to reduce UE power consumption. For example, a UE performing partial sensing or random resource selection (e.g., a power-saving UE) may perform full sensing for a short period of time prior to the selected transmission resource timing (hereinafter referred to as short-term sensing (STS)) in order to avoid resource collision due to aperiodic transmission. For example, since the STS is performed before each selected transmission resource, power consumption of a UE by the STS may increase when the selected resource is temporally distant.

<FIG> is a figure for explaining why burst resource reservation is necessary.

Referring to (a) of <FIG>, when three resources are far apart in time, in order to avoid resource collision due to aperiodic transmission, a UE needs to perform STS for each of the three resources. In this case, power consumption of the UE may increase due to the three STSs.

For example, in order to minimize power consumption of the UE by such an STS, when the UE selects resources based on partial sensing or random selection, the UE selects resources adj acent to each other within a resource selection window. Referring to (b) of <FIG>, the UE may select three adjacent resources within a resource selection window. In this case, the UE can avoid resource collision due to aperiodic transmission by performing one STS for three resources. Therefore, power consumption of the UE can be saved.

Due to the above reasons, aggregated resource-based SL transmission needs to be allowed in order to reduce power consumption of a UE, ensure reliability of SL communication, and increase resource use efficiency.

On the other hand, in NR-V2X system supporting aperiodic transmissions, (partial) sensing or random selection based resource selection methods of LTE-V2X supporting only periodic transmissions may not be suitable.

According to an embodiment of the present disclosure, a burst transmission method suitable for an NR-V2X system supporting aperiodic transmission and a device supporting the same are proposed. Also, a burst resource selection method suitable for an NR-V2X system supporting aperiodic transmission and a device supporting the same are proposed. Also, a burst resource selection method considering HARQ feedback suitable for an NR-V2X system supporting aperiodic transmission and a device supporting the same are proposed.

For example, a " specific threshold value " may mean a threshold value predefined or (pre-)configured by a higher layer (including an application layer) of the network or base station or UE. The term "specific configuration value" may mean a value predefined or (pre-)configured by the network or higher layers (including application layers) of the base station or UE. The term "configured by the network/base station" may refer to an operation that a base station (pre-)configures to a UE by upper layer RRC signaling, configures/signals to a UE via MAC CE, or signals to a UE via DCI.

For example, a power-saving UE performing partial sensing or random resource selection may perform full sensing for a short time interval prior to the selected transmission resource to avoid resource collisions due to aperiodic transmissions. In the following, STS may refer to short-term sensing.

For example, since STS is performed before each selected transmission resource, UE power consumption by STS may be large if the selected resources are temporally distant. For example, to minimize such STS-induced UE power consumption, when a UE selects resources based on partial sensing or randomly, the UE may select adjacent or temporally close (burst) resources within a resource selection window.

According to an embodiment of the present disclosure, after the initial transmission resource is selected based on partial sensing or randomly, a resource that is temporally close to the initial transmission resource may be preferentially selected when retransmission resources are selected thereafter. In this case, the initial transmission resource and the retransmission resource may be selected such that they do not exist within the same slot.

According to an embodiment of the present disclosure, in the process of resource selection and reselection, if one resource is selected and then one additional resource is selected, the additional resource may be selected from the selected resources within a certain time interval determined by a certain configuration value or a value configured by the network, preferentially over the other resources.

According to an embodiment of the present disclosure, the additional resources may be randomly selected from among the preferentially selected resources with an RSRP lower than a specific threshold. For example, the specific threshold related to RSRP to which RSRP values of selected resources are compared may be configured differently for burst transmission resources than for general non-burst transmission resources. For example, the specific threshold value related to the RSRP may be configured to be higher for burst transmission resources than the value configured for general non-burst transmission resources.

According to an embodiment of the present disclosure, a specific configuration value related to an RSRP offset that is increased when the number of selected resources does not satisfy the ratio that the candidate resources selected should occupy of the total available resources targeted, may be configured differently for burst transmission resources than for general non-burst transmission resources. For example, the specific configuration value related to the RSRP offset may be higher for burst transmission resources than the value configured for general non-burst transmission resources.

According to an embodiment of the present disclosure, a specific threshold related to a target percentage occupied by a selected candidate resource among all available resources may be configured differently for burst transmission resources than for general non-burst transmission resources. For example, the specific threshold related to the target percentage may be configured to be lower for the burst transmission resources than the value configured for the general non-burst transmission resources.

As described above, if UEs select initial transmission resources and retransmission resources as burst type resources that are adjacent or close to each other, the probability of transmission resource collisions between UEs for the burst resources may increase. To address this issue, according to an embodiment of the present disclosure, the burst resource selection may be performed for resources (e.g., different sub-channels) in different/non-overlapping frequency regions between UEs for a particular slot. For example, such selection of different/non-overlapping frequency resources may be selected such that the UEs may be FDMed to each other based on a source ID, destination ID, or UE ID of the transmitted packet.

According to an embodiment of the present disclosure, a UE that selects resources based on partial sensing or randomly selects resources may select resources of the burst type under the following conditions.

According to an embodiment of the present disclosure, resource selection and transmission of the burst type may be determined based on the priority and requirements such as reliability/latency/distance, service requirements, etc. of a transmission packet.

According to an embodiment of the present disclosure, for a UE performing partial sensing or random resource selection, the time range of reserved resources signaled by SCI may be configured differently from the value configured for a UE performing full sensing. For example, for a UE performing partial sensing or random resource selection, the time range of reserved resources signaled by SCI may be configured to be smaller than the value configured for a UE performing full sensing (e.g., <NUM> slots). By configuring the resource reservation range to be smaller, a UE may select resources that are adjacent or close to each other.

According to an embodiment of the present disclosure, if HARQ is enabled in the resource pool, the burst-type resources described above are selected and transmitted as resources related to an initial transmission and a blind retransmission, and retransmission resources based on HARQ feedback may be selected sensing-based or randomly, without being limited to the burst resource configuration.

According to an embodiment of the present disclosure, the burst resource may be defined as a set of resources located within a time range corresponding to a specific configuration value or a value configured by the network. In this case, the time range of the burst resources may be greater than or equal to the number of hours/slots corresponding to the number of transmission resources to be selected.

According to an embodiment of the present disclosure, a candidate burst resource for the burst resource to be finally selected may comprise a combination of all frequency resources or subchannels that may be present in each SL slot within the time range and all SL slots present within the time range.

According to an embodiment of the present disclosure, the candidate burst resources may comprise a combination of frequency resources or sub-channels representative of each SL slot within the time range, after selecting one frequency resource or sub-channel as representative of each SL slot.

According to an embodiment of the present disclosure, when selecting a candidate burst resource of a power-saving UE based on partial sensing, the UE may determine an average RSRP value of all transmission resources belonging to the burst resource as the RSRP value of the burst resource, and select the burst resources with RSRP values below a specific threshold as candidate burst resources.

According to an embodiment of the present disclosure, candidate burst resources with an RSRP value less than or equal to a specific threshold may be selected from among combinations of frequency resources/sub-channels of each slot and slots within the time range. In this case, among the candidate burst resources, a burst resource with the lowest RSRP value may be selected from among the candidate burst resources that consist only of transmission resources included within the same slot, or a candidate burst resource may be randomly selected. For example, the number of candidate burst resources selected in the manner described above may be required to satisfy a ratio greater than X, which is a ratio of candidate resources to total available resources, determined by a specific configuration value or a value configured by the network.

According to an embodiment of the present disclosure, in order to reduce the complexity of the above method, a resource with the lowest RSRP for each slot may be selected as a representative resource for that slot, or a resource with an RSRP value lower than a specific threshold value may be randomly selected as a representative resource for that slot. Thereafter, after the burst resources that consist of the representative resources of each slot and exist within the time range are configured, a burst resource with the lowest RSRP value among the burst resources with a lower burst RSRP value than a specific threshold value may be selected, or a candidate burst resource may be randomly selected. For example, an RSRP threshold used to select a representative resource for each of the slots may be configured differently from an RSRP threshold used to determine each of the burst resources. For example, an RSRP threshold value used to select a representative resource for each of the slots may be configured to be the same as an RSRP threshold value used to determine each of the burst resources. For example, burst resources satisfying the burst resource RSRP for selecting a candidate burst resource may be configured to temporally partially overlap each other. For example, burst resources satisfying the burst resource RSRP for selecting a candidate burst resource may be configured to temporally non-overlap each other.

According to an embodiment of the present disclosure, when multiple candidate burst resources are selected, the temporal interval between the burst resources may be limited to be greater than or equal to the length of the STS window.

According to an embodiment of the present disclosure, for a transmission in which an SL resource pool is configured to HARQ-enabled, and HARQ-enabed is indicated via SCI, when selecting a candidate burst resource, since resources that are at least HARQ RTT apart should be selected, a time range corresponding to the specific configuration value or a value configured by the network, which is the maximum time interval between resources belonging to the candidate burst resource, may be configured to be not less than the HARQ RTT value.

For example, if HARQ feedback is enabled in an SL resource pool and burst transmissions are performed as described above, if a UE makes an initial transmission and then continues to perform transmissions through the burst resource before receiving the linked HARQ feedback, it will waste resources for unnecessary transmissions when the initial transmission was successful.

According to an embodiment of the present disclosure, to address the above issues, SL burst resources and HARQ resources may be configured in TDM format. For example, when multiple burst resources are configured, a HARQ resource may be configured in a time interval between the burst resources. In this case, the HARQ resource is a HARQ resource related to a burst resource that is temporally prior to the HARQ resource, and by receiving the corresponding HARQ feedback after performing the burst transmission, not performing further burst transmission if the transmission is successful, and performing additional burst transmission only if the transmission is unsuccessful, congestion caused by unnecessary transmission may be prevented, and waste of transmission resources used for unnecessary transmission may be minimized. For example, burst resources and HARQ resources may be TDMed in the following order.

According to an embodiment of the present disclosure, the HARQ resource may also consist of burst resources that are temporally adjacent or whose time intervals are within a specific threshold.

According to an embodiment of the present disclosure, a UE may transmit through the burst resource for the initial transmission and blind retransmission, and then receive HARQ feedback through a HARQ resource configured temporally later, and transmit based on conventional partial sensing or random selection-based resource selection, without transmitting through a burst resource for further retransmissions based on the HARQ feedback.

According to an embodiment of the present disclosure, in the TDM configuration of the burst resource and the HARQ resource, one burst resource may be mapped to one PSFCH slot or one HARQ burst resource. For example, as a condition for configuring a burst resource, it may be limited to a resource linked to one PSFCH slot or one HARQ burst transmission resource.

By doing so, interference with other UE communications and HARQ feedback by HARQ feedback may be minimized even in communications between UEs performing random resource selection. For example, for a UE or resource pool performing random resource selection, a (burst) resource may be randomly selected from among burst resources that satisfy a structure that allows TDM of burst resources and HARQ resources as described above.

According to an embodiment of the present disclosure, if a UE selects a plurality of burst resources for power saving, it may configure a PSFCH slot for HARQ feedback to be mapped to any one of the selected burst resources. For example, as described above, to minimize unnecessary transmissions and resource waste, a HARQ feedback for the temporally n-th burst resource may be configured to be located in the first slot (initial slot) within the (n+<NUM>)th burst resource.

According to an embodiment of the present disclosure, when a burst resource and a HARQ resource are configured in TDM format, the temporally earliest burst resource after the HARQ resource may need to be configured to satisfy the SL HARQ RTT condition linked to the HARQ feedback.

According to various embodiments of the present disclosure, the proposed burst transmission method, the burst transmission resource selection method, and the HARQ-based burst transmission method may have the effect of minimizing power consumption of power-saving UE operations in an NR-V2X system supporting aperiodic transmission.

For example, for (or, for each of) at least one among elements/parameters of service type (and/or (LCH or service) priority and/or QOS requirements (e.g., latency, reliability, minimum communication range) and/or PQI parameters) (and/or HARQ feedback enabled (and/or disabled) LCH/MAC PDU (transmission) and/or CBR measurement value of a resource pool and/or SL cast type (e.g., unicast, groupcast, broadcast) and/or SL groupcast HARQ feedback option (e.g., NACK only feedback, ACK/NACK feedback, NACK only feedback based on TX-RX distance) and/or SL mode <NUM> CG type (e.g., SL CG type <NUM>/<NUM>) and/or SL mode type (e.g., mode <NUM>/<NUM>) and/or resource pool and/or PSFCH resource configured resource pool and/or source (L2) ID (and/or destination (L2) ID) and/or PC5 RRC connection/link and/or SL link and/or (with base station) connection state (e.g., RRC connected state, IDLE state, inactive state) and/or whether an SL HARQ process (ID) and/or (of a transmitting UE or a receiving UE) performs an SL DRX operation and/or whether it is a power saving (transmitting or receiving) UE and/or (from the perspective of a specific UE) case when PSFCH transmission and PSFCH reception (and/or a plurality of PSFCH transmissions (exceeding UE capability)) overlap (and/or a case where PSFCH transmission (and/or PSFCH reception) is omitted) and/or a case where a receiving UE actually (successfully) receives a PSCCH (and/or PSSCH) (re)transmission from a transmitting UE, etc.), whether the rule is applied (and/or the proposed method/rule-related parameter value of the present disclosure) may be specifically (or differently or independently) configured/allowed. In addition, in the present disclosure, "configuration" (or "designation") wording may be extended and interpreted as a form in which a base station informs a UE through a predefined (physical layer or higher layer) channel/signal (e.g., SIB, RRC, MAC CE) (and/or a form provided through pre-configuration and/or a form in which a UE informs other UEs through a predefined (physical layer or higher layer) channel/signal (e.g., SL MAC CE, PC5 RRC)), etc. In addition, in this disclosure, the "PSFCH" wording may be extended and interpreted as "(NR or LTE) PSSCH (and/or (NR or LTE) PSCCH) (and/or (NR or LTE) SL SSB (and/or UL channel/signal))". And, the methods proposed in the present disclosure may be used in combination with each other (in a new type of manner).

According to an embodiment of the present disclosure, when a UE selects a burst transmission resource, the burst transmission resource may be selected more easily by configuring the RSRP threshold used when selecting the burst transmission resource to be higher than when selecting a non-burst transmission resource. In addition, burst transmission resource selection may allow partial sensing to be performed in a resource-efficient manner, thereby improving power savings.

<FIG> shows a procedure for a first device to perform wireless communication, according to one embodiment of the present disclosure.

Referring to <FIG>, in step S1110, a first device may obtain a configuration related to a resource pool. In step S1120, the first device may perform sensing for selecting a sidelink, SL, resource in the resource pool. In step S1130, the first device may select a burst transmission resource, in a selection window, including a plurality of transmission resources, based on the sensing. For example, a first reference signal received power, RSRP, threshold used in selection for the burst transmission resource may be greater than a second RSRP threshold used in selection for a non-burst transmission resource. In step S1140, the first device may transmit, to a second device, sidelink control information, SCI, for scheduling of a physical sidelink shared channel, PSSCH, through a physical sidelink control channel, PSCCH, based on the burst transmission resource. For example, the SCI may include information related to the burst transmission resource. In step S1150, the first device may transmit, to the second device, a medium access control, MAC, protocol data unit, PDU, through the PSSCH, based on the burst transmission resource.

For example, the burst transmission resource may be randomly selected among resources with a smaller RSRP value than the first RSRP threshold.

For example, an interval between the plurality of transmission resources may be less than or equal to a time threshold.

For example, an interval between an initial resource and a last resource among the plurality of transmission resources may be less than or equal to a time threshold.

For example, the sensing may be partial sensing.

For example, selecting the burst transmission resource may include: selecting a first resource included in the burst transmission resource; and selecting a second resource included in the burst transmission resource, based on the first resource.

For example, the first resource may be selected based on partial sensing.

For example, the first resource may be randomly selected.

For example, a resource located within a time threshold from the first resource may be preferentially selected as the second resource.

For example, the time threshold may be configured by network.

For example, a frequency region of the burst transmission resource may be determined based on at least one of a source identifier, ID, or a destination ID related to the MAC PDU.

For example, a frequency region of the burst transmission resource may be determined based on a user equipment, UE, ID of the first device.

For example, the burst transmission resource may be selected based on a hybrid automatic repeat request, HARQ, feedback being enabled to the resource pool, and the transmission of the MAC PDU may be an initial transmission or a blind retransmission for the MAC PDU.

The embodiments described above may be applied to various devices described below. For example, a processor <NUM> of a first device <NUM> may obtain a configuration related to a resource pool. And, the processor <NUM> of the first device <NUM> may perform sensing for selecting a sidelink, SL, resource in the resource pool. And, the processor <NUM> of the first device <NUM> may select a burst transmission resource, in a selection window, including a plurality of transmission resources, based on the sensing. For example, a first reference signal received power, RSRP, threshold used in selection for the burst transmission resource may be greater than a second RSRP threshold used in selection for a non-burst transmission resource. And, the processor <NUM> of the first device <NUM> may control a transceiver <NUM> to transmit, to a second device <NUM>, sidelink control information, SCI, for scheduling of a physical sidelink shared channel, PSSCH, through a physical sidelink control channel, PSCCH, based on the burst transmission resource. For example, the SCI may include information related to the burst transmission resource. And, the processor <NUM> of the first device <NUM> may control the transceiver <NUM> to transmit, to the second device <NUM>, a medium access control, MAC, protocol data unit, PDU, through the PSSCH, based on the burst transmission resource.

According to an embodiment of the present disclosure, a first device for performing wireless communication may be proposed. For example, the first device may comprise: 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 the instructions to: obtain a configuration related to a resource pool; perform sensing for selecting a sidelink, SL, resource in the resource pool; select a burst transmission resource, in a selection window, including a plurality of transmission resources, based on the sensing, wherein a first reference signal received power, RSRP, threshold used in selection for the burst transmission resource may be greater than a second RSRP threshold used in selection for a non-burst transmission resource; transmit, to a second device, sidelink control information, SCI, for scheduling of a physical sidelink shared channel, PSSCH, through a physical sidelink control channel, PSCCH, based on the burst transmission resource, wherein the SCI may include information related to the burst transmission resource; and transmit, to the second device, a medium access control, MAC, protocol data unit, PDU, through the PSSCH, based on the burst transmission resource.

According to an embodiment of the present disclosure, a device adapted to control a first user equipment, UE, may be proposed. For example, the device may comprise: one or more processors; and one or more memories operably connectable to the one or more processors and storing instructions. For example, the one or more processors may execute the instructions to: obtain a configuration related to a resource pool; perform sensing for selecting a sidelink, SL, resource in the resource pool; select a burst transmission resource, in a selection window, including a plurality of transmission resources, based on the sensing, wherein a first reference signal received power, RSRP, threshold used in selection for the burst transmission resource may be greater than a second RSRP threshold used in selection for a non-burst transmission resource; transmit, to a second UE, sidelink control information, SCI, for scheduling of a physical sidelink shared channel, PSSCH, through a physical sidelink control channel, PSCCH, based on the burst transmission resource, wherein the SCI may include information related to the burst transmission resource; and transmit, to the second UE, a medium access control, MAC, protocol data unit, PDU, through the PSSCH, based on the burst transmission resource.

According to an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be proposed. For example, the instructions, when executed, may cause a first device to: obtain a configuration related to a resource pool; perform sensing for selecting a sidelink, SL, resource in the resource pool; select a burst transmission resource, in a selection window, including a plurality of transmission resources, based on the sensing, wherein a first reference signal received power, RSRP, threshold used in selection for the burst transmission resource may be greater than a second RSRP threshold used in selection for a non-burst transmission resource; transmit, to a second device, sidelink control information, SCI, for scheduling of a physical sidelink shared channel, PSSCH, through a physical sidelink control channel, PSCCH, based on the burst transmission resource, wherein the SCI may include information related to the burst transmission resource; and transmit, to the second device, a medium access control, MAC, protocol data unit, PDU, through the PSSCH, based on the burst transmission resource.

<FIG> shows a procedure for a second device to perform wireless communication, according to an embodiment of the present disclosure.

Referring to <FIG>, in step S1210, a second device may receive, from a first device, sidelink control information, SCI, for scheduling of a physical sidelink shared channel, PSSCH, through a physical sidelink control channel, PSCCH, based on a burst transmission resource including a plurality of transmission resources. For example, the SCI may include information related to the burst transmission resource. In step S1220, the second device may receive, from the first device, a medium access control, MAC, protocol data unit, PDU, through the PSSCH, based on the burst transmission resource. For example, the burst transmission resource may be selected in a selection window based on sensing performed in a resource pool, and a first reference signal received power, RSRP, threshold used in selection for the burst transmission resource may be greater than a second RSRP threshold used in selection for a non-burst transmission resource.

The embodiments described above may be applied to various devices described below. For example, a processor <NUM> of a second device <NUM> may control a transceiver <NUM> to receive, from a first device <NUM>, sidelink control information, SCI, for scheduling of a physical sidelink shared channel, PSSCH, through a physical sidelink control channel, PSCCH, based on a burst transmission resource including a plurality of transmission resources. For example, the SCI may include information related to the burst transmission resource. And, the processor <NUM> of the second device <NUM> may control the transceiver <NUM> to receive, from the first device <NUM>, a medium access control, MAC, protocol data unit, PDU, through the PSSCH, based on the burst transmission resource. For example, the burst transmission resource may be selected in a selection window based on sensing performed in a resource pool, and a first reference signal received power, RSRP, threshold used in selection for the burst transmission resource may be greater than a second RSRP threshold used in selection for a non-burst transmission resource.

According to an embodiment of the present disclosure, a second device for performing wireless communication may be proposed. For example, the second device may comprise: 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 the instructions to: receive, from a first device, sidelink control information, SCI, for scheduling of a physical sidelink shared channel, PSSCH, through a physical sidelink control channel, PSCCH, based on a burst transmission resource including a plurality of transmission resources, wherein the SCI may include information related to the burst transmission resource; and receive, from the first device, a medium access control, MAC, protocol data unit, PDU, through the PSSCH, based on the burst transmission resource, wherein the burst transmission resource may be selected in a selection window based on sensing performed in a resource pool, and wherein a first reference signal received power, RSRP, threshold used in selection for the burst transmission resource may be greater than a second RSRP threshold used in selection for a non-burst transmission resource.

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

<FIG> shows a communication system <NUM>, based on an embodiment of the present disclosure.

Referring to <FIG>, a communication system <NUM> to which various embodiments of the present disclosure are applied includes wireless devices, Base Stations (BSs), and a network. Herein, the wireless devices represent devices performing communication using Radio Access Technology (RAT) (e.g., <NUM> New RAT (NR)) or Long-Term Evolution (LTE)) and may be referred to as communication/radio/<NUM> devices. The wireless devices may include, without being limited to, a robot 100a, vehicles 100b-<NUM> and 100b-<NUM>, an eXtended Reality (XR) device 100c, a hand-held device 100d, a home appliance 100e, an Internet of Things (IoT) device 100f, and an Artificial Intelligence (AI) device/server <NUM>. For example, the vehicles may include a vehicle having a wireless communication function, an autonomous vehicle, and a vehicle capable of performing communication between vehicles. Herein, the vehicles may include an Unmanned Aerial Vehicle (UAV) (e.g., a drone). The XR device may include an Augmented Reality (AR)/Virtual Reality (VR)/Mixed Reality (MR) device and may be implemented in the form of a Head-Mounted Device (HMD), a Head-Up Display (HUD) mounted in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, etc. The hand-held device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch or a smartglasses), and a computer (e.g., a notebook). For example, the BSs and the network may be implemented as wireless devices and a specific wireless device 200a may operate as a BS/network node with respect to other wireless devices.

Here, wireless communication technology implemented in wireless devices 100a to 100f of the present disclosure may include Narrowband Internet of Things for low-power communication in addition to LTE, NR, and <NUM>. In this case, for example, NB-IoT technology may be an example of Low Power Wide Area Network (LPWAN) technology and may be implemented as standards such as LTE Cat NB1, and/or LTE Cat NB2, and is not limited to the name described above. 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, the LTE-M technology may be an example of the LPWAN and may be called by various names including enhanced Machine Type Communication (eMTC), and the like. For example, the LTE-M technology may be implemented as at least any one of various standards such as <NUM>) LTE CAT <NUM>, <NUM>) LTE Cat M1, <NUM>) LTE Cat M2, <NUM>) LTE non-Bandwidth Limited (non-BL), <NUM>) LTE-MTC, <NUM>) LTE Machine Type Communication, and/or <NUM>) LTE M, and is not limited to the name described above. 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, Low Power Wide Area Network (LPWAN), and ZigBee considering the low-power communication, and is not limited to the name described above. As an example, the ZigBee technology may generate personal area networks (PAN) related to small/low-power digital communication based on various standards including IEEE <NUM>. <NUM>, and the like, and may be called by various names.

Wireless communication/connections 150a, 150b, or 150c may be established between the wireless devices 100a to 100f/BS <NUM>, or BS <NUM>/BS <NUM>. Herein, the wireless communication/connections may be established through various RATs (e.g., <NUM> 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 devices and the BSs/the wireless devices may transmit/receive radio signals to/from each other through the wireless communication/connections 150a and 150b. For example, the wireless communication/connections 150a and 150b may transmit/receive signals through various physical channels. To this end, at least a part of various configuration information configuring processes, various signal processing processes (e.g., channel encoding/decoding, modulation/demodulation, and resource mapping/demapping), and resource allocating processes, for transmitting/receiving radio signals, may be performed based on the various proposals of the present disclosure.

<FIG> shows wireless devices, based on an embodiment of the present disclosure.

<FIG> shows a signal process circuit for a transmission signal, based on an embodiment of the present disclosure.

<FIG> shows another example of a wireless device, based on an embodiment of the present disclosure.

<FIG> shows a hand-held device, based on an embodiment of the present disclosure. The hand-held device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch or a smartglasses), or a portable computer (e.g., a notebook). The hand-held 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).

<FIG> shows a vehicle or an autonomous vehicle, based on an embodiment of the present disclosure. 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. The embodiment of <FIG> may be combined with various embodiments of the present disclosure.

For example, the communication unit <NUM> 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 obtained data. The control unit <NUM> may control the driving unit 140a such that the vehicle or the autonomous vehicle <NUM> 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 <NUM> may aperiodically/periodically acquire recent traffic information data from the external server and acquire surrounding traffic information data from neighboring vehicles. In the middle of autonomous driving, the sensor unit 140c may obtain a vehicle state and/or surrounding environment information. The autonomous driving unit 140d may update the autonomous driving path and the driving plan based on the newly obtained data/information. The communication unit <NUM> may transfer information about a vehicle position, the autonomous driving path, and/or the driving plan to the external server. The external server may predict traffic information data using AI technology, etc., based on the information collected from vehicles or autonomous vehicles and provide the predicted traffic information data to the vehicles or the autonomous vehicles.

Claim 1:
A method for performing, by a first device, wireless communication, the method comprising:
obtaining a configuration related to a resource pool;
performing sensing for selecting a sidelink, SL, resource in the resource pool;
selecting a burst transmission resource, in a selection window, including a plurality of transmission resources, based on the sensing,
wherein a first reference signal received power, RSRP, threshold used in selection for the burst transmission resource is greater than a second RSRP threshold used in selection for a non-burst transmission resource;
transmitting, to a second device, sidelink control information, SCI, for scheduling of a physical sidelink shared channel, PSSCH, through a physical sidelink control channel, PSCCH, based on the burst transmission resource,
wherein the SCI includes information related to the burst transmission resource; and transmitting, to the second device, a medium access control, MAC, protocol data unit, PDU, through the PSSCH, based on the burst transmission resource.