Patent ID: 9743434
Date: 2017-08-22
CPC Classifications: H04B,H04W

Claim:
1. A method of performing link setup with an access point (AP) by a station (STA) in a wireless communication system, the method comprising: receiving a first frame related to link setup from an AP; wherein the first frame is a fast initial link setup (FILS) discovery frame, transmitting a second frame related to association to the AP; receiving a third frame from the AP as a response to the second frame; and synchronizing with the AP and performing the association with the AP, wherein if the second frame includes a timestamp request information, and an AP configuration change count (CCC) value of the STA is identical to an AP CCC value included in the received first frame, the third frame includes at least one or more of timestamp information and Timing Synchronization Function (TSF) information of the AP, and the STA and the AP are synchronized by the third frame without receiving a fourth frame, wherein if the second frame does not include the timestamp request information, a fourth frame including Timestamp information is received from the AP, and the STA and the AP are synchronized, and wherein the fourth frame is the beacon frame.