Disclosed is a method performed by a user equipment (UE) including generating, by a first UE, first information, and transmitting the first information to a second UE, the first information being used, at the second UE, as reference information for selecting resources, wherein content of the first information includes at least one of resources preferred by the first UE, resources not preferred by the first UE, a channel sensing result from the first UE, transmission parameters preferred by the first UE, and transmission parameters not preferred by the first UE.