Method for controlling platooning by device in wireless communication system supporting sidelink, and apparatus therefor

A method for performing platooning by a third device that is a platooning member of a first platooning group in a wireless communication system supporting sidelink, the method comprising:

• transmitting platooning information on the first platooning group;
• receiving a notification message for notification of merging with a second platooning group from a first device serving as a leader of the first platooning group;
• and
• updating the platooning information on the basis of the notification message and transmitting the updated platooning information,
• wherein the updated platooning information includes first platooning information on the previous first platooning group, which is sub-group information, and second platooning information on the merged first and second platooning groups, and a platooning level different from a platooning level of the second platooning group is set in the first platooning information.

A first device controlling platooning of a first platooning group in a wireless communication system supporting sidelink, the first device comprising:

• a radio frequency (RF) transceiver;
• and
• a processor connected to the RF transceiver,
• wherein the processor is configured to control the RF transceiver to receive information on a second platooning group controlled by a second device from the second device, to transmit a merge request message for merging with the second platooning group on the basis of the information on the second platooning group, and to update platooning information related to the platooning on the basis of merging of the first platooning group and the second platooning group,
• wherein the updated platooning information includes first platooning information on the previous first platooning group, which is sub-group information, and second platooning information on the merged first and second platooning groups.