Method and device for shifting state of NAN terminal in wireless communication system

A method for changing a state of a neighbor awareness networking (NAN) terminal, which is performed by the NAN terminal in a wireless communication system, the method comprising:

• receiving, from a first anchor master, a first synchronization beacon frame;
• and
• receiving, from a second anchor master, a second synchronization beacon frame after the reception of the first synchronization beacon frame;
• changing the state of the NAN terminal to a state capable of transmitting a synchronization beacon frame, regardless of an received signal strength indicator (RSSI) of the first synchronization beacon frame and an RSSI of the second synchronization beacon frame, when anchor master information included in the first synchronization beacon frame is different from anchor master information included in the second synchronization beacon frame and the NAN terminal is in a Non-Master Non-Sync state;
• changing a master rank value to a predetermined value when the state of the NAN terminal is either an anchor master or a master and the NAN terminal fails to transmit discovery beacon frames a predetermined number of times or more during a prescribed period;
• and
• restoring the master rank value to a value before the change of the master rank value when a value related to a channel state becomes equal to or greater than the predetermined value.