Patent ID: 9749937
Date: 2017-08-29
CPC Classifications: H04L,H04W

Claim:
1. A method of scanning, performed by a station (STA) in a wireless communication system, the method comprising: broadcasting a first frame, by the STA, to one or more access points (APs); and receiving a second frame from a first AP among the one or more APs, which have received the broadcasted first frame, wherein the first frame comprises one or more basic service set ID (BSSID)-AP configuration change count (AP CCC) pairs, wherein the first AP is associated with a BSSID of a BSSID-AP CCC pair among the one or more BSSID-AP CCC pairs, and wherein when an AP CCC value of the first AP is different from an AP CCC value paired with the BSSID associated with the first AP, the second frame contains system information of the first AP, which includes a current AP CCC value of the first AP, an updated information element and dynamic information, wherein the AP CCC value of the first AP is maintained when a dynamic information update occurs, and wherein the AP CCC value of the first AP increases by 1 when a system information update, not including a dynamic information update, occurs.