Abstract: A method of a terminal may comprise: receiving on-demand synchronization signal block (SSB) transmission configuration information from a first base station to which the terminal is connected; and receiving an on-demand SSB from a second base station based on the on-demand SSB transmission configuration information, wherein the on-demand SSB transmission configuration information includes at least one of capability information of the second base station, on-demand SSB resource information, a number of on-demand SSB transmissions, on-demand SSB transmission indication, or channel state information (CSI) configuration information.

Abstract: An operation method of a transmitting terminal in a communication system may comprise: receiving resource coordination information; selecting a resource for sidelink communication based on the resource coordination information; and transmitting data to one or more receiving terminals by using the selected resource, wherein the resource coordination information is one of information on a preferred resource and information on a non-preferred resource for the sidelink communication.

Abstract: A method and a device for configuring a reference signal for coverage extension are disclosed. A method of a terminal comprises the steps of: receiving, from a base station, DCI including information indicating whether PT-RS is mapped; identifying that the PT-RS is mapped to a data channel on the basis of the information; and performing a procedure of transmitting or receiving the data channel including the PT-RS to or from the base station.

Abstract: An operation method of a first terminal performing sidelink communication may comprise the steps of: receiving resource coordination information from a second terminal; if the resource coordination information is information on preferred resource(s), selecting candidate resources to be used for transmission of the first terminal based on the preferred resource(s); and if the resource coordination information is information on non-preferred resource(s), excluding the non-preferred resource(s) from the candidate resources to be used for transmission of the first terminal.

Abstract: An operation method of a relay in a mobile communication system may comprise the steps of: receiving information relating to a backhaul reception beam and/or a backhaul transmission beam from a base station; receiving information relating to an access link transmission beam and/or an access link reception beam from the base station or obtaining information relating to an access link transmission beam and/or an access link reception beam from the information relating to the backhaul reception beam and/or backhaul transmission beam; communicating with the base station by using the backhaul reception beam and/or the backhaul transmission beam formed using the information relating to the backhaul reception beam and/or backhaul transmission beam; and communicating with a terminal by using the access link transmission beam and/or the access link reception beam formed using the information relating to the access link transmission beam and/or access link reception beam.

Abstract: An operation method of a terminal in a communication system may comprise receiving first random access (RA) configuration information and second RA configuration information from a base station; transmitting a Msg1 to the base station based on the second RA configuration information; receiving a Msg2, which is a response to the Msg1, from the base station; and repeatedly transmitting a Msg3 K times to the base station.

Abstract: Disclosed is a method for configuring a bandwidth for supporting a broadband carrier in a communication system. An operation method of a base station comprises the steps of: configuring a first bandwidth part and a second bandwidth part for a terminal; configuring a reserved resource for the first bandwidth part in a resource area in which the first bandwidth part and the second bandwidth part overlap; and performing an operation of transmitting or receiving a second data channel, which is scheduled to the second bandwidth part, together with the terminal by using the reserved resource. Therefore, the performance of the communication system can be improved.

Abstract: Disclosed are methods and apparatuses for transmitting and receiving data channels in a communication system. An operation method of a terminal in a communication system may comprise receiving, from a base station, resource allocation information of a plurality of physical uplink shared channels (PUSCHs) used for repetitive transmission of a same transport block (TB); identifying a position of each of the plurality of PUSCHs in a time domain based on the resource allocation information; and repeatedly transmitting the same TB to the base station at the position of each of the plurality of PUSCHs. Therefore, performance of the communication system can be improved.

Abstract: An operation method of a terminal in a communication system may include: selecting one or more control elements among a plurality of control elements included first UCI in consideration of a size of an uplink resource; generating multiplexed UCIs by multiplexing second UCI with the one or more control elements; and transmitting the multiplexed UCIs to a base station by using the uplink resource.

Abstract: Disclosed is a method and apparatus for transmitting or receiving a control channel in a communication system. A method for transmitting control information by a base station includes: configuring a control resource set including a plurality of REGs; interleaving, on a frequency axis, the plurality of REGs included in the control resource set; configuring an REG pool including at least two interleaved REGs; configuring at least one CCE in the REG pool; and transmitting control information through a search space configured by the at least one CCE. Therefore, the present invention can improve performance of a communication system.

Abstract: A method and an apparatus for transmitting a hybrid automatic repeat request (HARQ) response of a physical downlink shared channel (PDSCH) may comprise receiving a first semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) from a base station, generating first hybrid automatic repeat request-acknowledgement (HARQ-ACK) information of the first SPS PDSCH, determining a second resource after a first resource when transmission of the first HARQ-ACK information is not performed in the first resource, and transmitting a HARQ-ACK codebook including the first HARQ-ACK information using the second resource to the base station.

Abstract: An operation method of a source terminal for sidelink communication comprises transmitting at least two transport blocks (TBs) or code block groups (CBGs) to a destination terminal, and receiving hybrid automatic repeat request-acknowledgement/negative acknowledgement (HARQ-ACK/NACK) bits for the at least two TBs or CBGs from the destination terminal. The operation method further comprises generating an HARQ codebook based on the HARQ-ACK/NACK bits, and reporting the generated HARQ codebook to a serving base station.

Abstract: A method and apparatus for transmitting or receiving a control channel in a communication system. A method for transmitting control information by a base station includes: configuring a control resource set including a plurality of REGs; interleaving, on a frequency axis, the plurality of REGs included in the control resource set; configuring an REG pool including at least two interleaved REGs; configuring at least one CCE in the REG pool; and transmitting control information through a search space configured by the at least one CCE. Therefore, the present invention improves performance of a communication system.

Abstract: An operation method of a transmitting terminal in a communication system may comprise: receiving resource coordination information; selecting a resource for sidelink communication based on the resource coordination information; and transmitting data to one or more receiving terminals by using the selected resource, wherein the resource coordination information is one of information on a preferred resource and information on a non-preferred resource for the sidelink communication.

Abstract: An operation method of a terminal in a communication system may comprise receiving first random access (RA) configuration information and second RA configuration information from a base station; transmitting a Msg1 to the base station based on the second RA configuration information; receiving a Msg2, which is a response to the Msg1, from the base station; and repeatedly transmitting a Msg3 K times to the base station.

Abstract: The method and apparatus for supporting sidelink carrier aggregation are disclosed. A method of a first terminal may comprise: aligning sidelink (SL) resources in a first component carrier (CC) and a second CC; and performing SL communication with a second terminal using the SL resources aligned within the first CC and the second CC.

Abstract: Disclosed is a method for configuring a bandwidth for supporting a broadband carrier in a communication system. An operation method of a base station comprises the steps of: configuring a first bandwidth part and a second bandwidth part for a terminal; configuring a reserved resource for the first bandwidth part in a resource area in which the first bandwidth part and the second bandwidth part overlap; and performing an operation of transmitting or receiving a second data channel, which is scheduled to the second bandwidth part, together with the terminal by using the reserved resource. Therefore, the performance of the communication system can be improved.

Abstract: A method of a terminal may comprise: receiving, from a base station, DCI including downlink scheduling information and information indicating that a beam adjustment period exists; receiving, from the base station, an initial signal in the beam adjustment period; adjusting a Rx beam of the terminal based on a measurement result of the initial signal; and receiving, from the base station, data by using the adjusted Rx beam in a resource region indicated by the downlink scheduling information.

Abstract: Disclosed are various methods for transmitting or receiving data or control information having high reliability conditions. A method for operating a terminal which transmits uplink control information (UCI) includes: a step of generating UCI; a step of comparing the priority of an uplink (UL) control channel for the transmission of the UCI with the priority of a UL data channel when some symbols of the UL control channel and the UL data channel overlap; and a step of selecting the UL channel having a higher priority among the UL control channel and the UL data channel, and transmitting the UCI to a base station through the selected UL channel.

Abstract: Disclosed are methods and apparatuses for transmitting and receiving downlink control channel in communication system. An operation method of a terminal in a communication system includes receiving configuration information of a resource set for a physical downlink control channel (PDCCH) monitoring operation from a base station; performing the PDCCH monitoring operation in the resource set; receiving at least one downlink control information (DCI) including scheduling information of a first physical downlink shared channel (PDSCH) by the PDCCH monitoring operation; and receiving the first PDSCH based on the scheduling information.