Method and apparatus for configuring bandwidth part in sidelink communication

An operation method of a second terminal in a communication system, comprising:

• receiving, at a processor from a first terminal, configuration information of a plurality of sidelink (SL) bandwidth parts (BWPs) configured by the first terminal through a default SL BWP;
• configuring, by the processor, a candidate SL BWP list including one or more SL BWPs based on a plurality of SL BWPs configured by the second terminal and the plurality of SL BWPs configured by the first terminal;
• transmitting, by the processor, the candidate SL BWP list to the first terminal via the default SL BWP;
• receiving, by the processor, a final SL BWP list determined based on the candidate SL BWP list and configuration information of an initial SL BWP from the first terminal via the default SL BWP;
• and
• performing, by the processor, SL communication with the first terminal using the initial SL BWP.

A first terminal in a communication system, the first terminal including a processor and a memory configured to store at least one instruction executable by the processor, wherein the at least one instruction causes the processor to:

• configure a plurality of sidelink (SL) bandwidth parts (BWPs) used for SL communication between the first terminal and a second terminal;
• receive a candidate SL BWP list including at least one SL BWP configured by the second terminal from the second terminal via a default SL BWP;
• transmit a final SL BWP list including one or more SL BWPs among the plurality of SL BWPs and the at least one SL BWP included in the candidate SL BWP list to the second terminal through the default SL BWP;
• and
• perform SL communication with the second terminal using an initial SL BWP among the one or more SL BWPs included in the final SL BWP list.

An operation method of a first terminal in a communication system, comprising:

• configuring, by a processor, a plurality of sidelink (SL) bandwidth parts (BWPs) used for SL communication between the first terminal and a second terminal;
• transmitting, by the processor, an SL BWP list including one or more SL BWPs among the plurality of SL BWPs to the second terminal via a default SL BWP;
• and
• performing, by the processor, SL communication with the second terminal using an initial SL BWP among the one or more SL BWPs included in the SL BWP list,
• wherein the initial SL BWP is determined by the first terminal, and configuration information of the initial SL BWP is transmitted to the second terminal together with the SL BWP list.