Abstract: A method and an apparatus for sidelink communication using a reserved resource in a communication system are disclosed. The operation method of a first terminal may comprise the steps of: generating SCI including a first information element indicating the presence or absence of transmission of SL data #1 using a reserved resource after transmission of SL data #0; transmitting the SCI to a second terminal; and transmitting the SL data #0 to the second terminal on the basis of the SCI.

Abstract: Disclosed are a method and apparatus for reporting channel state information for sidelink communication. An operating method for a first terminal comprises the steps of: transmitting, to a second terminal, first step SCI including resource allocation information; transmitting, to the second terminal, second step SCI including CSI request information; and when the CSI request information indicates a request for a CSI report, receiving, from the second terminal, a message including SL CSI in a resource indicated by the resource allocation information.

Abstract: An operation method of a first terminal in a communication system is provided. The method includes transmitting first SCI to a second terminal, the first SCI including one or more information elements among information indicating time resource(s) for sidelink communication, information indicating frequency resource(s) for the sidelink communication, information indicating a periodicity of physical resources for the sidelink communication, and information indicating an MCS for the sidelink communication. Second SCI is transmitted to the second terminal, the second SCI including information for an HARQ feedback operation and information indicating an NDI. The method further includes performing the sidelink communication with the second terminal based on the first SCI and the second SCI associated with the first SCI.

Abstract: A method and an apparatus for transmitting and receiving reference signals for sidelink communication are provided. The operation method of a first terminal includes receiving a message including a first DMRS scrambling identifier for sidelink communication from a base station and calculating a first DMRS sequence based on the first DMRS scrambling identifier. Additionally, the method includes transmitting SCI and a first DMRS generated based on the first DMRS sequence to a second terminal.

Abstract: A sidelink communication method performed by a UE is provided. The method includes receiving from a base station a message including zone configuration information and resource pool configuration information and selecting a zone type mapped to a speed of the UE among zone types indicated by the zone configuration information. A zone identifier is determined based on configuration information of the selected zone type, the configuration information of the selected zone type being included in the zone configuration information. The sidelink communication is performed using a resource pool mapped to the zone identifier among resource pools indicated by the resource pool configuration information.

Abstract: A sidelink communication method performed by a UE includes receiving from a base station a message including first configuration information of a common resource pool and second configuration information for an occupancy state reporting of the common resource pool. The method also includes receiving from the base station an indicator indicating resources used for sidelink communication within the common resource pool by performing a monitoring operation on resources indicated by the second configuration information and performing sidelink communication using resources other than the resources indicated by the indicator within the common resource pool indicated by the first configuration information.

Abstract: An operation method of a first communication node in a vehicle-to-everything (V2X) communication system may include: receiving, by the first communication node, control information including resource allocation information from a second communication node; receiving, by the first communication node, data from the second communication node through a radio resource indicated by the resource allocation information included in the control information; generating, by the first communication node, sidelink control information (SCI) including reception configuration information indicating the radio resource used for transmission of the data by the second communication node based on the resource allocation information; and transmitting, by the first communication node, the SCI to a third communication node.

Abstract: An operation method of a first terminal in a communication system is provided. The method includes transmitting first SCI to a second terminal, the first SCI including one or more information elements among information indicating time resource(s) for sidelink communication, information indicating frequency resource(s) for the sidelink communication, information indicating a periodicity of physical resources for the sidelink communication, and information indicating an MCS for the sidelink communication. Second SCI is transmitted to the second terminal, the second SCI including information for an HARQ feedback operation and information indicating an NDI. The method further includes performing the sidelink communication with the second terminal based on the first SCI and the second SCI associated with the first SCI.

Abstract: Disclosed are a method and apparatus for transmitting and receiving an HARQ response in a communication system. An operation method of a first terminal comprises the steps of: configuring a first HARQ identifier mapped to a first HARQ feedback resource; transmitting, to a second terminal, a message including the first HARQ identifier; transmitting sidelink data to a plurality of terminals belonging to a groupcast group in a groupcast method; and receiving, from the second terminal, an HARQ response to the sidelink data in the first HARQ feedback resource mapped to the first HARQ identifier.

Abstract: Disclosed is a method and device for allocating a sidelink resource in a communication system. An operation method of a first terminal comprises the steps of: generating first stage SCI including first resource allocation information and a first indicator indicating whether second stage SCI includes second resource allocation information; transmitting the first state SCI to a second terminal through a PSCCH; and performing sidelink communication with the second terminal by using a first resource area indicated by the first resource allocation information.

Abstract: A method and an apparatus for transmitting and receiving HARQ responses in a communication system are provided. An operation method of a first terminal in a communication system includes receiving configuration information including a first information element indicating a type of a hybrid automatic repeat request-acknowledgment (HARQ-ACK) codebook from a base station and generating the HARQ-ACK codebook including a downlink (DL) HARQ information bit for downlink communication between the base station and the first terminal and a sidelink (SL) HARQ information bit for sidelink communication between the first terminal and a second terminal. The HARQ-ACK codebook is transmitted to the base station using an uplink channel.

Abstract: Disclosed are a method and apparatus for transmitting and receiving an HARQ response in a communication system supporting sidelink communication. An operating method for a transmitting terminal comprises the steps of: receiving, from a base station, a higher layer signaling message including PSFCH configuration information; transmitting, to one or more receiving terminals, an SCI including data resource allocation information; transmitting, to the one or more receiving terminals, the data on a PSSCH indicated by the SCI; and performing a monitoring operation on a dedicated PSFCH resource region indicated by the PSFCH configuration information in order to receive a reception response to the SCI from the one or more receiving terminals. Therefore, the performance of the communication system can be improved.

Abstract: A method and a device for aperiodic data transmission in sidelink communication are disclosed. An operating method of a first terminal comprises the steps of: transmitting, to a base station, a request message requesting the allocation of sidelink resources for aperiodic data; receiving, from the base station, first CG configuration information that includes first resource allocation information indicating the sidelink resources; checking the sidelink resources indicated by the first resource allocation information; and, when the aperiodic data is generated, transmitting, to a second terminal, the aperiodic data in a first transmission period comprising the sidelink resources. Therefore, the performance of a communication system can be improved.

Abstract: Disclosed is a method for configuring a sidelink resource in a communication system. An operation method of a first terminal comprises the steps of: generating SCI #n including scheduling information of data #n and resource allocation information for transmission or reception of data #m; transmitting SCI #n to a second terminal via PSCCH #n; and transmitting data #n to the second terminal via PSSCH #n indicated by the scheduling information included in SCI #n. Therefore, the performance of a communication system can be improved.

Abstract: A method and a device for reservation of a sidelink resource in a communication system are disclosed. An operation method of a transmission terminal comprises the steps of: generating an SCI #n including resource allocation information about a PSSCH #n and resource allocation information about a PSSCH #n+k; transmitting the SCI #n to a reception terminal in the PSCCH #n; transmitting data #n to the reception terminal in the PSSCH #n indicated by the SCI #n; and receiving, from the reception terminal, a HARQ response to the data #n.

Abstract: Disclosed are a method and apparatus for transmitting and receiving an HARQ response in a communication system supporting sidelink communication. An operating method for a transmitting terminal comprises the steps of: receiving, from a base station, a higher layer signaling message including PSFCH configuration information; transmitting, to a plurality of receiving terminals, SCI including resource allocation information of data and configuration information for HARQ feedback on the data; transmitting, to the plurality of receiving terminals, the data on a PSSCH indicated by the SCI; and receiving, from the plurality of receiving terminals, a sequence mapped to HARQ responses to the data on a PSFCH indicated by the PSFCH configuration information. Therefore, the performance of the communication system can be improved.

Abstract: Disclosed are a method and an apparatus for transmitting and receiving HARQ responses in a communication system supporting sidelink communication. The method of operating a transmitting terminal comprises the steps of: receiving, from a base station, a higher layer signaling message including PSFCH configuration information; transmitting, to a plurality of receiving terminals, SCI including resource allocation information of data and configuration information for HARQ feedback for the data; transmitting the data to the plurality of receiving terminals in a PSSCH indicated by the SCI; and performing a monitoring operation to receive, from the plurality of receiving terminals, sequences mapped to HARQ responses for the data in a PSFCH resource region indicated by the PSFCH configuration information. Therefore, the performance of a communication system can be improved.

Abstract: Disclosed is a resource allocation method in sidelink communication. An operation method of a terminal includes the steps of: receiving a first message, including mobility conditions to be used for selecting a resource allocation mode for sidelink communication, from a base station; selecting the resource allocation mode to be applied to the terminal, the selection being made on the basis of the results of a comparison between the mobility of the terminal and the mobility conditions; determining a resource pool on the basis of the selected resource allocation mode; and performing the sidelink communication by using the determined resource pool. Accordingly, the performance of a communication system can be enhanced.

Abstract: A method for configuring sidelink resources in a communication system is disclosed. An operation method of a first terminal comprises the steps of: generating SCI including a time aggregation level indicating n time intervals, time resource allocation information indicating time resources used for transmission of data within the n time intervals, and frequency resource allocation information; transmitting the SCI to a second terminal; and transmitting, to the second terminal, the data in a PSSCH consisting of the time resources and frequency resources indicated by the frequency resource allocation information. Therefore, the performance of the communication system can be improved.

Abstract: A method and apparatus for transmission and reception of sidelink control information in a communication system are disclosed. An operation method of a transmission terminal comprises the steps of: generating first stage SCI including resource allocation information of a plurality of pieces of second stage SCI; transmitting the first stage SCI to one or more reception terminals; and transmitting the plurality of pieces of second stage SCI to the one or more reception terminals in a resource area indicated by the resource allocation information. Therefore, the performance of the communication system can be improved.