Active scanning method and apparatus

摘要

The present invention relates to an active scanning method and apparatus. The method of performing scanning in a wireless local area network (WLAN) includes: a step of a scanning station generating scan request information so as to order active scanning; a step of the scanning station receiving a scanning frame from the station; and a step of the scanning station transmitting a probe request frame in order to perform the active scanning in case the received scanning frame does not include any of the elements that are ordered in the scan request information. Accordingly, scanning procedures can be performed quickly.

主权项

1. A method of performing scanning in a wireless LAN system, the method comprising:
generating, by a scanning station, scan request information to indicate active scanning; waiting, by the scanning station, until probe delay time indicated by the scan request information expires or an indication primitive indicating a physical layer of the scanning station has successfully received a valid physical layer header of a new physical protocol data unit (PPDU) is received at a medium access control (MAC) layer of the scanning station; and upon waiting, determining, by the scanning station, whether to transmit a probe request frame by checking whether a broadcast addressed probe request frame received at the scanning station identifies an access point (AP) which the scanning station considers a suitable candidate for association, wherein the scanning station does not transmit the probe request frame if the broadcast addressed probe request frame identifies the access point (AP).