Method and device for exchanging connection capability information in wireless communication system

A first user equipment (UE) for performing connection capability exchange (CCEX) in a wireless communication system, the first UE comprising:

• a memory;
• and
• at least one processor coupled with the memory and configured to:
• transmit, to a second UE, a peer-to-peer (P2P) probe request frame comprising
• connection capability exchange (CCEX) information comprising information on indicating whether a connection topology is supported and information related to an infrastructure connection being supported, wherein the connection topology comprises a P2P connection;
• in response to the P2P probe request frame, receive, from the second UE, a P2P probe response frame comprising information on a selected connection interface;
• wherein the selected connection interface is one of:
• the connection topology or the infrastructure connection;
• establish, with the second UE, the ASP session over the selected connection interface based on the information on the selected connection interface;
• and wherein:
• the CCEX information comprises an information field with a bit sequence;
• a most significant bit (MSB), included in the bit sequence, indicates whether the P2P connection is supported;
• and
• a bit, included in the bit sequence and next to the MSB, indicates whether the infrastructure connection is supported.