Patent ID: 9503967
Filing Date: 2016-11-22
CPC Classification: H04L,H04W

Claim Text:
1. A method for scanning by a station (STA), comprising: unicasting, by the STA, a short probe request frame to a target access point (AP) via a first channel, wherein the target AP is determined based on a basic service identifier (BSSID) included in an MAC Layer Management Entity (MLME).SCAN.request.primitive; unicasting, by the STA, a probe request frame to a the target AP via the first channel when receiving a first acknowledgement (ACK) transmitted by the target AP as a response to the short probe request frame, wherein the short probe request frame is transmitted before the probe request frame is transmitted via the first channel; determining, by the STA, whether a second ACK for the probe request frame is received via the first channel within a second ACK transmission time; monitoring, by the STA, for a probe response frame, as a response to the probe request frame, on the first channel if the second ACK is received within the second ACK transmission time; and switching, by the STA, a scanning channel from the first channel to a second channel regardless of a clear channel assessment (CCA) level detected during the second ACK transmission time when a timer for the second ACK transmission time expires if the second ACK is not received within the second ACK transmission time.