Patent ID: 9144088
Filing Date: 2015-09-22
Classification: H04W

Abstract:
1. A method for managing a network allocation vector (NAV) by a station (STA) in a wireless LAN (WLAN) system, the method comprising: receiving a Contention Free (CF)-END frame including a duration field; if a value of duration field of the CF-END frame is equal to zero, resetting the NAV; and if the value of duration field of the CF-END frame is equal to non-zero, the STA discards the CF-END frame when the value of non-zero duration field of the CF-END frame is not within a predetermined range of values based on a NAV value of the STA, and the STA resets the NAV when the value of non-zero duration field of the CF-END frame is within the predetermined range of values based on the NAV value of the STA.